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Greiner JV, Glonek T. Adenosine Triphosphate (ATP) and Protein Aggregation in Age-Related Vision-Threatening Ocular Diseases. Metabolites 2023; 13:1100. [PMID: 37887425 PMCID: PMC10609282 DOI: 10.3390/metabo13101100] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2023] [Revised: 10/16/2023] [Accepted: 10/17/2023] [Indexed: 10/28/2023] Open
Abstract
Protein aggregation is the etiopathogenesis of the three most profound vision-threatening eye diseases: age-related cataract, presbyopia, and age-related macular degeneration. This perspective organizes known information on ATP and protein aggregation with a fundamental unrecognized function of ATP. With recognition that maintenance of protein solubility is related to the high intracellular concentration of ATP in cells, tissues, and organs, we hypothesize that (1) ATP serves a critical molecular function for organismal homeostasis of proteins and (2) the hydrotropic feature of ATP prevents pathological protein aggregation while assisting in the maintenance of protein solubility and cellular, tissue, and organismal function. As such, the metabolite ATP plays an extraordinarily important role in the prevention of protein aggregation in the leading causes of vision loss or blindness worldwide.
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Affiliation(s)
- Jack V. Greiner
- Schepens Eye Research Institute of Massachusetts Eye & Ear Infirmary, Boston, MA 02114, USA
- Department of Ophthalmology, Harvard Medical School, Boston, MA 02115, USA
- Clinical Eye Research of Boston, Boston, MA 01890, USA;
| | - Thomas Glonek
- Clinical Eye Research of Boston, Boston, MA 01890, USA;
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2
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Zhang SS, Gu LN, Zhang T, Xu L, Wei X, Chen SH, Shi SJ, Sun DQ, Zhou SH, Zhao QY. Case report: Fatal infantile hypertonic myofibrillar myopathy with compound heterozygous mutations in the CRYAB gene. Front Pediatr 2022; 10:993165. [PMID: 36727013 PMCID: PMC9884804 DOI: 10.3389/fped.2022.993165] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/13/2022] [Accepted: 12/09/2022] [Indexed: 01/17/2023] Open
Abstract
BACKGROUND Fatal infantile hypertonic myofibrillar myopathy (FIHMM) is an autosomal recessive hereditary disease characterized by amyotrophy, progressive flexion contracture and ankylosis of the trunk and limb muscles, apnea and respiratory failure, and increased creatine phosphate levels. It is caused by mutations in the CRYAB gene, and only around 18 cases including genetic mutations have been reported worldwide. All patients with FIHMM develop respiratory distress, progressive stiffness of the limbs, and have a poor prognosis. However, no effective treatment for CRYAB-associated respiratory failure has been reported. Here, we report a case of FIHMM with a novel heterozygous missense mutation. CASE PRESENTATION A 2-year-old female developed scoliosis of the lumbar spine and restrictive ventilatory dysfunction in infancy. She was admitted to the hospital with labored breathing on the third day after the second injection of inactivated poliomyelitis vaccine. Acute respiratory failure, pneumothorax, and cardiac arrest arose in the patient during hospitalization, and progressive stiffness of the trunk and limb muscles appeared, accompanied by obvious abdominal distension and an increase in phosphocreatine kinase levels. Screenings for genetic metabolic diseases in the blood and urine were normal. Electromyography revealed mild myogenic damage. A muscle biopsy indicated the accumulation of desmin, α-crystallin, and myotilin in the musculus biceps brachii, and dense granules were observed in muscle fibers using electron microscopy. Mutation analysis of CRYAB revealed a novel heterozygous missense mutation in the proband, c.302A > C (p.His101Pro) and c.3G > A (p.Met1Ile), which inherited from her asymptomatic, heterozygous carrier parents, respectively. The proband was finally diagnosed as FIHMM. One month after the FIHMM diagnosis, the child died of respiratory failure. CONCLUSION We report a case of FIHMM with a novel heterozygous missense mutation of CRYAB. This finding might improve our understanding of FIHMM and highlight a novel mutation in the Chinese population.
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Affiliation(s)
- Shan-Shan Zhang
- Pediatric Respiratory Ward I, Lianyungang Maternal and Children's Hospital, Lianyungang, China
| | - Li-Niu Gu
- Department of Immunization Planning, Lianyungang Center for Disease Control and revention, Lianyungang, China
| | - Teng Zhang
- Department of Science & Education, Lianyungang Maternal and Children's Hospital, Lianyungang, China
| | - Lu Xu
- Department of Neonatology, Lianyungang Maternal and Children's Hospital, Lianyungang, China
| | - Xiang Wei
- Pediatric Respiratory Ward I, Lianyungang Maternal and Children's Hospital, Lianyungang, China
| | - Su-Hong Chen
- Pediatric Respiratory Ward I, Lianyungang Maternal and Children's Hospital, Lianyungang, China
| | - Su-Jie Shi
- Pediatric Respiratory Ward I, Lianyungang Maternal and Children's Hospital, Lianyungang, China
| | - Da-Quan Sun
- Pediatric Respiratory Ward I, Lianyungang Maternal and Children's Hospital, Lianyungang, China
| | - Shao-Hong Zhou
- Pediatric Respiratory Ward I, Lianyungang Maternal and Children's Hospital, Lianyungang, China
| | - Qian-Ye Zhao
- Pediatric Respiratory Ward I, Lianyungang Maternal and Children's Hospital, Lianyungang, China
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3
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Eronina TB, Mikhaylova VV, Chebotareva NA, Shubin VV, Kleymenov SY, Kurganov BI. Effect of arginine on stability and aggregation of muscle glycogen phosphorylase b. Int J Biol Macromol 2020; 165:365-374. [PMID: 32961195 DOI: 10.1016/j.ijbiomac.2020.09.101] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2020] [Revised: 09/14/2020] [Accepted: 09/14/2020] [Indexed: 11/26/2022]
Abstract
Arginine (Arg) is frequently used in biotechnology and pharmaceutics to stabilize protein preparations. When using charged ions like Arg, it is necessary to take into account their contribution to the increase in ionic strength, in addition to the effect of Arg on particular processes occurring under the conditions of constancy of ionic strength. Here, we examined contribution of ionic strength (0.15 and 0.5 M) to the effects of Arg on denaturation, thermal inactivation and aggregation of skeletal muscle glycogen phosphorylase b (Phb). Dynamic light scattering, analytical ultracentrifugation, differential scanning calorimetry, circular dichroism and enzymatic activity assay were used to assess the effects of Arg at constant ionic strength compared with the effects of ionic strength alone. We found that high ionic strength did not affect the secondary structure of Phb, but changed conformation of the protein. Such a destabilization of the enzyme causes an increase in the initial rate of aggregation and inactivation of Phb thereby affecting its denaturation. Binding of Arg causes additional changes in the protein conformation, weakening the bonds between monomers in the dimer. This causes the dimer to dissociate into monomers, which rapidly aggregate. Thus, Arg acts on these processes much stronger than just ionic strength.
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Affiliation(s)
- Tatiana B Eronina
- Bach Institute of Biochemistry, Federal Research Centre "Fundamentals of Biotechnology", Russian Academy of Sciences, Leninsky pr. 33, Moscow 119071, Russia
| | - Valeriya V Mikhaylova
- Bach Institute of Biochemistry, Federal Research Centre "Fundamentals of Biotechnology", Russian Academy of Sciences, Leninsky pr. 33, Moscow 119071, Russia
| | - Natalia A Chebotareva
- Bach Institute of Biochemistry, Federal Research Centre "Fundamentals of Biotechnology", Russian Academy of Sciences, Leninsky pr. 33, Moscow 119071, Russia
| | - Vladimir V Shubin
- Bach Institute of Biochemistry, Federal Research Centre "Fundamentals of Biotechnology", Russian Academy of Sciences, Leninsky pr. 33, Moscow 119071, Russia
| | - Sergey Y Kleymenov
- Bach Institute of Biochemistry, Federal Research Centre "Fundamentals of Biotechnology", Russian Academy of Sciences, Leninsky pr. 33, Moscow 119071, Russia; Koltzov Institute of Developmental Biology, Russian Academy of Sciences, Vavilova 26, Moscow 119991, Russia
| | - Boris I Kurganov
- Bach Institute of Biochemistry, Federal Research Centre "Fundamentals of Biotechnology", Russian Academy of Sciences, Leninsky pr. 33, Moscow 119071, Russia.
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Brooks D, Naeem F, Stetsiv M, Goetting SC, Bawa S, Green N, Clark C, Bashirullah A, Geisbrecht ER. Drosophila NUAK functions with Starvin/BAG3 in autophagic protein turnover. PLoS Genet 2020; 16:e1008700. [PMID: 32320396 PMCID: PMC7176095 DOI: 10.1371/journal.pgen.1008700] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2019] [Accepted: 02/28/2020] [Indexed: 11/18/2022] Open
Abstract
The inability to remove protein aggregates in post-mitotic cells such as muscles or neurons is a cellular hallmark of aging cells and is a key factor in the initiation and progression of protein misfolding diseases. While protein aggregate disorders share common features, the molecular level events that culminate in abnormal protein accumulation cannot be explained by a single mechanism. Here we show that loss of the serine/threonine kinase NUAK causes cellular degeneration resulting from the incomplete clearance of protein aggregates in Drosophila larval muscles. In NUAK mutant muscles, regions that lack the myofibrillar proteins F-actin and Myosin heavy chain (MHC) instead contain damaged organelles and the accumulation of select proteins, including Filamin (Fil) and CryAB. NUAK biochemically and genetically interacts with Drosophila Starvin (Stv), the ortholog of mammalian Bcl-2-associated athanogene 3 (BAG3). Consistent with a known role for the co-chaperone BAG3 and the Heat shock cognate 71 kDa (HSC70)/HSPA8 ATPase in the autophagic clearance of proteins, RNA interference (RNAi) of Drosophila Stv, Hsc70-4, or autophagy-related 8a (Atg8a) all exhibit muscle degeneration and muscle contraction defects that phenocopy NUAK mutants. We further demonstrate that Fil is a target of NUAK kinase activity and abnormally accumulates upon loss of the BAG3-Hsc70-4 complex. In addition, Ubiquitin (Ub), ref(2)p/p62, and Atg8a are increased in regions of protein aggregation, consistent with a block in autophagy upon loss of NUAK. Collectively, our results establish a novel role for NUAK with the Stv-Hsc70-4 complex in the autophagic clearance of proteins that may eventually lead to treatment options for protein aggregate diseases.
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Affiliation(s)
- David Brooks
- Department of Biochemistry and Molecular Biophysics, Kansas State University, Manhattan, KS, United States of America
| | - Fawwaz Naeem
- Department of Biochemistry and Molecular Biophysics, Kansas State University, Manhattan, KS, United States of America
| | - Marta Stetsiv
- Department of Biochemistry and Molecular Biophysics, Kansas State University, Manhattan, KS, United States of America
| | - Samantha C Goetting
- Department of Biochemistry and Molecular Biophysics, Kansas State University, Manhattan, KS, United States of America
| | - Simranjot Bawa
- Department of Biochemistry and Molecular Biophysics, Kansas State University, Manhattan, KS, United States of America
| | - Nicole Green
- Department of Biochemistry and Molecular Biophysics, Kansas State University, Manhattan, KS, United States of America
| | - Cheryl Clark
- Department of Biochemistry and Molecular Biophysics, Kansas State University, Manhattan, KS, United States of America
| | - Arash Bashirullah
- Division of Pharmaceutical Sciences, University of Wisconsin-Madison, Madison, WI, United States of America
| | - Erika R Geisbrecht
- Department of Biochemistry and Molecular Biophysics, Kansas State University, Manhattan, KS, United States of America
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Honisch C, Donadello V, Hussain R, Peterle D, De Filippis V, Arrigoni G, Gatto C, Giurgola L, Siligardi G, Ruzza P. Application of Circular Dichroism and Fluorescence Spectroscopies To Assess Photostability of Water-Soluble Porcine Lens Proteins. ACS Omega 2020; 5:4293-4301. [PMID: 32149259 PMCID: PMC7057709 DOI: 10.1021/acsomega.9b04234] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/10/2019] [Accepted: 02/04/2020] [Indexed: 06/10/2023]
Abstract
The eye lens is mainly composed of the highly ordered water-soluble (WS) proteins named crystallins. The aggregation and insolubilization of these proteins lead to progressive lens opacification until cataract onset. Although this is a well-known disease, the mechanism of eye lens protein aggregation is not well understood; however, one of the recognized causes of proteins modification is related to the exposure to UV light. For this reason, the spectroscopic properties of WS lens proteins and their stability to UV irradiation have been evaluated by different biophysical methods including synchrotron radiation circular dichroism, fluorescence, and circular dichroism spectroscopies. Moreover, dynamic light scattering, gel electrophoresis, transmission electron microscopy, and protein digestion followed by tandem LC-MS/MS analysis were used to study the morphological and structural changes in protein aggregates induced by exposure to UV light. Our results clearly indicated that the exposure to UV radiation modified the protein conformation, inducing a loss of ordered structure and aggregation. Furthermore, we confirmed that these changes were attributable to the generation of reactive oxygen species due to the irradiation of the protein sample. This approach, involving the photodenaturation of proteins, provides a benchmark in high-throughput screening of small molecules suitable to prevent protein denaturation and aggregation.
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Affiliation(s)
- Claudia Honisch
- Institute
of Biomolecular Chemistry of CNR, Padua
Unit, 35131 Padova, Italy
- Department
of Chemical Sciences, University of Padova, 35131 Padova, Italy
| | - Viola Donadello
- Institute
of Biomolecular Chemistry of CNR, Padua
Unit, 35131 Padova, Italy
| | - Rohanah Hussain
- Diamond
Light Source Ltd., Harwell Science and
Innovation Campus, Didcot, Oxfordshire OX11 0DE, United Kingdom
| | - Daniele Peterle
- Department
of Pharmaceutical and Pharmacological Sciences, University of Padova, 35131 Padova, Italy
| | - Vincenzo De Filippis
- Department
of Pharmaceutical and Pharmacological Sciences, University of Padova, 35131 Padova, Italy
| | - Giorgio Arrigoni
- Department
of Biomedical Sciences, University of Padova, 35131 Padova, Italy
- Proteomics
Center, University of Padova and Azienda
Ospedaliera di Padova, 35129 Padova, Italy
| | - Claudio Gatto
- Alchilife
Srl, R&D, Viale Austria
14, 35020 Ponte
San Nicolò (PD), Italy
| | - Laura Giurgola
- Alchilife
Srl, R&D, Viale Austria
14, 35020 Ponte
San Nicolò (PD), Italy
| | - Giuliano Siligardi
- Diamond
Light Source Ltd., Harwell Science and
Innovation Campus, Didcot, Oxfordshire OX11 0DE, United Kingdom
| | - Paolo Ruzza
- Institute
of Biomolecular Chemistry of CNR, Padua
Unit, 35131 Padova, Italy
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7
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Oki S, Iwashita K, Kimura M, Kano H, Shiraki K. Mechanism of co-aggregation in a protein mixture with small additives. Int J Biol Macromol 2018; 107:1428-1437. [DOI: 10.1016/j.ijbiomac.2017.10.004] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2017] [Revised: 09/29/2017] [Accepted: 10/02/2017] [Indexed: 12/16/2022]
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Arrigo AP. Analysis of HspB1 (Hsp27) Oligomerization and Phosphorylation Patterns and Its Interaction with Specific Client Polypeptides. Methods Mol Biol 2018; 1709:163-78. [PMID: 29177658 DOI: 10.1007/978-1-4939-7477-1_12] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Human HspB1 (also denoted as Hsp27) belongs to the family of small (or stress) proteins (sHsps). The family, which contains ten members including αA,B-crystallin polypeptides, is characterized by a conserved C-terminal α-crystallin domain and molecular weights ranging from 20 to 40 kDa. Here, procedures are described for analyzing the dynamic oligomerization and phosphorylation patterns of HspB1 in cells exposed to different environments. Changes in the structural organization of HspB1 can reprogram its interaction with specific partner/client polypeptides. Methods are presented to analyze these interactions using tissue culture cells genetically modified to express different levels of this protein. In addition, the laboratory approaches presented here could be used to test the nine other human sHsp members as well as sHsps from other species.
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Cetinel S, Semenchenko V, Cho JY, Sharaf MG, Damji KF, Unsworth LD, Montemagno C. UV-B induced fibrillization of crystallin protein mixtures. PLoS One 2017; 12:e0177991. [PMID: 28542382 PMCID: PMC5444657 DOI: 10.1371/journal.pone.0177991] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2016] [Accepted: 05/05/2017] [Indexed: 12/28/2022] Open
Abstract
Environmental factors, mainly oxidative stress and exposure to sunlight, induce the oxidation, cross-linking, cleavage, and deamination of crystallin proteins, resulting in their aggregation and, ultimately, cataract formation. Various denaturants have been used to initiate the aggregation of crystallin proteins in vitro. All of these regimens, however, are obviously far from replicating conditions that exist in vivo that lead to cataract formation. In fact, it is our supposition that only UV-B radiation may mimic the observed in vivo cause of crystallin alteration leading to cataract formation. This means of inducing cataract formation may provide the most appropriate in vitro platform for in-depth study of the fundamental cataractous fibril properties and allow for testing of possible treatment strategies. Herein, we showed that cataractous fibrils can be formed using UV-B radiation from α:β:γ crystallin protein mixtures. Characterization of the properties of formed aggregates confirmed the development of amyloid-like fibrils, which are in cross-β-pattern and possibly in anti-parallel β-sheet arrangement. Furthermore, we were also able to confirm that the presence of the molecular chaperone, α-crystallin, was able to inhibit fibril formation, as observed for ‘naturally’ occurring fibrils. Finally, the time-dependent fibrillation profile was found to be similar to the gradual formation of age-related nuclear cataracts. This data provided evidence for the initiation of fibril formation from physiologically relevant crystallin mixtures using UV-B radiation, and that the formed fibrils had several traits similar to that expected from cataracts developing in vivo.
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Affiliation(s)
- Sibel Cetinel
- Department of Chemical and Materials Engineering, University of Alberta, Edmonton, AB, Canada
- Ingenuity Lab., University of Alberta, Edmonton, AB, Canada
| | - Valentyna Semenchenko
- National Institute of Nanotechnology (NINT), 11421, Saskatchewan Drive NW, Edmonton, AB, Canada
| | - Jae-Young Cho
- National Institute of Nanotechnology (NINT), 11421, Saskatchewan Drive NW, Edmonton, AB, Canada
| | - Mehdi Ghaffari Sharaf
- Department of Chemical and Materials Engineering, University of Alberta, Edmonton, AB, Canada
- Ingenuity Lab., University of Alberta, Edmonton, AB, Canada
| | - Karim F. Damji
- Department of Ophthalmology and Visual Sciences, University of Alberta, Edmonton, AB, Canada
| | - Larry D. Unsworth
- Department of Chemical and Materials Engineering, University of Alberta, Edmonton, AB, Canada
- National Institute of Nanotechnology (NINT), 11421, Saskatchewan Drive NW, Edmonton, AB, Canada
- * E-mail: (CM); (LDU)
| | - Carlo Montemagno
- Department of Chemical and Materials Engineering, University of Alberta, Edmonton, AB, Canada
- Ingenuity Lab., University of Alberta, Edmonton, AB, Canada
- * E-mail: (CM); (LDU)
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Abstract
The importance of in vitro measurements in explaining the mechanisms underlying protein self-assembly in physiologically relevant conditions has been demonstrated in solution and in artificial and mammalian cells.
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Poska H, Haslbeck M, Kurudenkandy FR, Hermansson E, Chen G, Kostallas G, Abelein A, Biverstål H, Crux S, Fisahn A, Presto J, Johansson J. Dementia-related Bri2 BRICHOS is a versatile molecular chaperone that efficiently inhibits Aβ42 toxicity in Drosophila. Biochem J 2016; 473:3683-704. [PMID: 27514716 DOI: 10.1042/BCJ20160277] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2016] [Accepted: 08/11/2016] [Indexed: 11/17/2022]
Abstract
Formation of fibrils of the amyloid-β peptide (Aβ) is suggested to play a central role in neurodegeneration in Alzheimer's disease (AD), for which no effective treatment exists. The BRICHOS domain is a part of several disease-related proproteins, the most studied ones being Bri2 associated with familial dementia and prosurfactant protein C (proSP-C) associated with lung amyloid. BRICHOS from proSP-C has been found to be an efficient inhibitor of Aβ aggregation and toxicity, but its lung-specific expression makes it unsuited to target in AD. Bri2 is expressed in the brain, affects processing of Aβ precursor protein, and increased levels of Bri2 are found in AD brain, but the specific role of its BRICHOS domain has not been studied in vivo Here, we find that transgenic expression of the Bri2 BRICHOS domain in the Drosophila central nervous system (CNS) or eyes efficiently inhibits Aβ42 toxicity. In the presence of Bri2 BRICHOS, Aβ42 is diffusely distributed throughout the mushroom bodies, a brain region involved in learning and memory, whereas Aβ42 expressed alone or together with proSP-C BRICHOS forms punctuate deposits outside the mushroom bodies. Recombinant Bri2 BRICHOS domain efficiently prevents Aβ42-induced reduction in γ-oscillations in hippocampal slices. Finally, Bri2 BRICHOS inhibits several steps in the Aβ42 fibrillation pathway and prevents aggregation of heat-denatured proteins, indicating that it is a more versatile chaperone than proSP-C BRICHOS. These findings suggest that Bri2 BRICHOS can be a physiologically relevant chaperone for Aβ in the CNS and needs to be further investigated for its potential in AD treatment.
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Abstract
Hen egg white contains more than 40 kinds of proteins with concentrations reaching 100 mg/mL. Highly concentrated protein mixtures are common in the food industry, but the effects of a crowded environment containing salts on protein stability and aggregation have only been investigated using pure protein solutions. Here, we investigated the thermal aggregation of hen egg white protein (EWP) at various concentrations in the presence of inorganic salts by solubility measurements and SDS-PAGE. EWP at 1 mg/mL formed aggregates with increasing temperature above 55 °C; the aggregation temperatures increased in the presence of inorganic salt with the Hofmeister series. Namely, the chaotrope 0.5 M NaSCN completely suppressed the thermal aggregation of 1 mg/mL EWP. As the protein concentration increased, NaSCN unexpectedly enhanced the protein aggregation; the aggregation temperature of 10 and 100 mg/mL EWP solutions were dramatically decreased at 62 and 47 °C, respectively. This decrease in aggregation temperatures due to the chaotrope was described by the excluded volume effect, based on a comparative experiment using Ficoll 70 as a neutral crowder. By contrast, the kosmotrope Na2SO4 did not affect the aggregation temperature at concentrations from 1 to 100 mg/mL EWPs. The unexpected fact that a chaotrope rather enhanced the protein aggregation at high concentration provides new insight into the aggregation phenomena with the Hofmeister effect as well as the crude state of highly concentrated proteins.
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Affiliation(s)
- Kazuki Iwashita
- Faculty of Pure and Applied Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8573, Japan
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Haslbeck M, Peschek J, Buchner J, Weinkauf S. Structure and function of α-crystallins: Traversing from in vitro to in vivo. Biochim Biophys Acta Gen Subj 2015; 1860:149-66. [PMID: 26116912 DOI: 10.1016/j.bbagen.2015.06.008] [Citation(s) in RCA: 74] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2015] [Revised: 06/10/2015] [Accepted: 06/22/2015] [Indexed: 12/11/2022]
Abstract
BACKGROUND The two α-crystallins (αA- and αB-crystallin) are major components of our eye lenses. Their key function there is to preserve lens transparency which is a challenging task as the protein turnover in the lens is low necessitating the stability and longevity of the constituent proteins. α-Crystallins are members of the small heat shock protein family. αB-crystallin is also expressed in other cell types. SCOPE OF THE REVIEW The review summarizes the current concepts on the polydisperse structure of the α-crystallin oligomer and its chaperone function with a focus on the inherent complexity and highlighting gaps between in vitro and in vivo studies. MAJOR CONCLUSIONS Both α-crystallins protect proteins from irreversible aggregation in a promiscuous manner. In maintaining eye lens transparency, they reduce the formation of light scattering particles and balance the interactions between lens crystallins. Important for these functions is their structural dynamics and heterogeneity as well as the regulation of these processes which we are beginning to understand. However, currently, it still remains elusive to which extent the in vitro observed properties of α-crystallins reflect the highly crowded situation in the lens. GENERAL SIGNIFICANCE Since α-crystallins play an important role in preventing cataract in the eye lens and in the development of diverse diseases, understanding their mechanism and substrate spectra is of importance. To bridge the gap between the concepts established in vitro and the in vivo function of α-crystallins, the joining of forces between different scientific disciplines and the combination of diverse techniques in hybrid approaches are necessary. This article is part of a Special Issue entitled Crystallin Biochemistry in Health and Disease.
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Affiliation(s)
- Martin Haslbeck
- Center for Integrated Protein Science at the Department Chemie, Technische Universität München, Lichtenbergstr. 4, D-85747 Garching, Germany
| | - Jirka Peschek
- Center for Integrated Protein Science at the Department Chemie, Technische Universität München, Lichtenbergstr. 4, D-85747 Garching, Germany
| | - Johannes Buchner
- Center for Integrated Protein Science at the Department Chemie, Technische Universität München, Lichtenbergstr. 4, D-85747 Garching, Germany.
| | - Sevil Weinkauf
- Center for Integrated Protein Science at the Department Chemie, Technische Universität München, Lichtenbergstr. 4, D-85747 Garching, Germany.
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Borzova VA, Markossian KA, Muranov KO, Polyansky NB, Kleymenov SY, Kurganov BI. Quantification of anti-aggregation activity of UV-irradiated α-crystallin. Int J Biol Macromol 2015; 73:84-91. [DOI: 10.1016/j.ijbiomac.2014.10.060] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2014] [Revised: 10/22/2014] [Accepted: 10/27/2014] [Indexed: 10/24/2022]
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Arrigo AP, Ducarouge B, Lavial F, Gibert B. Immense Cellular Implications Associated to Small Stress Proteins Expression: Impacts on Human Pathologies. Heat Shock Proteins 2015. [DOI: 10.1007/978-3-319-16077-1_2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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16
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Hossain MT, Teshiba S, Shigeoka Y, Fujisawa T, Inoko Y, Sakano D, Yamamoto K, Banno Y, Aso Y. Structural Properties of Silkworm Small Heat-Shock Proteins: sHSP19.9 and sHSP20.8. Biosci Biotechnol Biochem 2014; 74:1556-63. [DOI: 10.1271/bbb.100131] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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17
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Borzova VA, Markossian KA, Kara DA, Chebotareva NA, Makeeva VF, Poliansky NB, Muranov KO, Kurganov BI. Quantification of anti-aggregation activity of chaperones: a test-system based on dithiothreitol-induced aggregation of bovine serum albumin. PLoS One 2013; 8:e74367. [PMID: 24058554 PMCID: PMC3769246 DOI: 10.1371/journal.pone.0074367] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2012] [Accepted: 08/03/2013] [Indexed: 12/22/2022] Open
Abstract
The methodology for quantification of the anti-aggregation activity of protein and chemical chaperones has been elaborated. The applicability of this methodology was demonstrated using a test-system based on dithiothreitol-induced aggregation of bovine serum albumin at 45°C as an example. Methods for calculating the initial rate of bovine serum albumin aggregation (v agg) have been discussed. The comparison of the dependences of v agg on concentrations of intact and cross-linked α-crystallin allowed us to make a conclusion that a non-linear character of the dependence of v agg on concentration of intact α-crystallin was due to the dynamic mobility of the quaternary structure of α-crystallin and polydispersity of the α-crystallin-target protein complexes. To characterize the anti-aggregation activity of the chemical chaperones (arginine, arginine ethyl ester, arginine amide and proline), the semi-saturation concentration [L]0.5 was used. Among the chemical chaperones studied, arginine ethyl ester and arginine amide reveal the highest anti-aggregation activity ([L]0.5 = 53 and 58 mM, respectively).
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Affiliation(s)
- Vera A. Borzova
- Department of Molecular Organization of Biological Structures, Bach Institute of Biochemistry, Russian Academy of Sciences, Moscow, Russia
| | - Kira A. Markossian
- Department of Molecular Organization of Biological Structures, Bach Institute of Biochemistry, Russian Academy of Sciences, Moscow, Russia
| | - Dmitriy A. Kara
- Department of Biochemistry, Faculty of Biology, Lomonosov Moscow State University, Moscow, Russia
| | - Natalia A. Chebotareva
- Department of Molecular Organization of Biological Structures, Bach Institute of Biochemistry, Russian Academy of Sciences, Moscow, Russia
| | - Valentina F. Makeeva
- Department of Molecular Organization of Biological Structures, Bach Institute of Biochemistry, Russian Academy of Sciences, Moscow, Russia
| | - Nikolay B. Poliansky
- Department of Chemical and Biological Processes Kinetics, Emanuel Institute of Biochemical Physics, Russian Academy of Sciences, Moscow, Russia
| | - Konstantin O. Muranov
- Department of Chemical and Biological Processes Kinetics, Emanuel Institute of Biochemical Physics, Russian Academy of Sciences, Moscow, Russia
| | - Boris I. Kurganov
- Department of Molecular Organization of Biological Structures, Bach Institute of Biochemistry, Russian Academy of Sciences, Moscow, Russia
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Chebotareva NA, Eronina TB, Roman SG, Poliansky NB, Muranov KO, Kurganov BI. Effect of crowding and chaperones on self-association, aggregation and reconstitution of apophosphorylase b. Int J Biol Macromol 2013; 60:69-76. [DOI: 10.1016/j.ijbiomac.2013.05.010] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2013] [Revised: 05/14/2013] [Accepted: 05/15/2013] [Indexed: 12/21/2022]
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Liu QN, Zhu BJ, Dai LS, Fu WW, Lin KZ, Liu CL. Overexpression of small heat shock protein 21 protects the Chinese oak silkworm Antheraea pernyi against thermal stress. J Insect Physiol 2013; 59:848-854. [PMID: 23763950 DOI: 10.1016/j.jinsphys.2013.06.001] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/31/2012] [Revised: 06/01/2013] [Accepted: 06/03/2013] [Indexed: 06/02/2023]
Abstract
Small heat shock proteins (sHSPs) usually act as molecular chaperones to prevent proteins from being denatured in extreme conditions. We first report the sHSP21 gene, named as Ap-sHSP21, in the Chinese oak silkworm Antheraea pernyi (Lepidoptera: Saturniidae). The full-length cDNA of Ap-sHSP21 is 976 bp, including a 5'-untranslated region (UTR) of 99 bp, a 3'-UTR of 316 bp and an open reading frame (ORF) of 561 bp encoding a polypeptide of 186 amino acids. The deduced A. pernyi sHSP21 protein sequence reveals the percent identity is 82-93% in comparison to other sHSPs from insects. Real-time quantitative reverse transcription-PCR (qRT-PCR) analysis shows that Ap-sHSP21 expression is higher in testis than that in other examined tissues and significantly up-regulated after heat shock. In addition, prokaryotic expression and purification of the Ap-sHSP21 protein were performed. SDS-PAGE and Western blot analysis demonstrated that a 25 kDa recombinant protein was successfully expressed in Escherichia coli cells and the purified recombinant protein was also confirmed to protect restriction enzymes from thermal inactivation. The expression of Ap-sHSP21 was significantly down-regulated after RNA interference, which was confirmed by qRT-PCR and Western blot analysis. All together, these results suggest that Ap-sHSP21 play a key role in thermal tolerance.
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Affiliation(s)
- Qiu-Ning Liu
- College of Life Sciences, Anhui Agricultural University, Hefei 230036, PR China
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Wang K, Zhang J, Xu Y, Ren K, Xie WL, Yan YE, Zhang BY, Shi Q, Liu Y, Dong XP. Abnormally upregulated αB-crystallin was highly coincidental with the astrogliosis in the brains of scrapie-infected hamsters and human patients with prion diseases. J Mol Neurosci 2013; 51:734-48. [PMID: 23832485 DOI: 10.1007/s12031-013-0057-x] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2013] [Accepted: 06/17/2013] [Indexed: 01/22/2023]
Abstract
αB-crystallin is a member of the small heat shock protein family constitutively presenting in brains at a relatively low level. To address the alteration of αB-crystallin in prion disease, the αB-crystallin levels in the brains of scrapie agent 263 K-infected hamsters were analyzed. The levels of αB-crystallin were remarkably increased in the brains of 263 K-infected hamsters, showing a time-dependent manner along with incubation time. Immunohistochemical (IHC) and immunofluorescent (IFA) assays illustrated more αB-crystallin-positive signals in the regions of the cortex and thalamus containing severe astrogliosis. Double-stained IFA verified that the αB-crystallin signals colocalized with the enlarged glial fibrillary acidic protein-positive astrocytes, but not with neuronal nuclei-positive cells. IHC and IFA of the serial brain sections of infected hamsters showed no colocalization and correlation between PrP(Sc) deposits and αB-crystallin increase. Moreover, increased αB-crystallin deposits were observed in the brain sections of parietal lobe of a sporadic Creutzfeldt-Jakob disease (sCJD) case, parietal lobe and thalamus of a G114V genetic CJD case, and thalamus of a fatal family insomnia (FFI) case, but not in a parietal lobe of FFI where only very mild astrogliosis was addressed. Additionally, the molecular interaction between αB-crystallin and PrP was only observed in the reactions of recombinant proteins purified from Escherichia coli, but not either in that of brain homogenates or in that of the cultured cell lysates expressing human PrP and αB-crystallin. Our data indicate that brain αB-crystallin is abnormally upregulated in various prion diseases, which is coincidental with astrogliosis. Direct interaction between αB-crystallin and PrP seems not to be essential during the pathogenesis of prion infection.
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Affiliation(s)
- Ke Wang
- School of Medicine, Xi'an Jiaotong University, Xi'an, 710061, People's Republic of China
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21
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Arrigo AP, Gibert B. Protein interactomes of three stress inducible small heat shock proteins: HspB1, HspB5 and HspB8. Int J Hyperthermia 2013; 29:409-22. [DOI: 10.3109/02656736.2013.792956] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
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22
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Arrigo AP. Human small heat shock proteins: Protein interactomes of homo- and hetero-oligomeric complexes: An update. FEBS Lett 2013; 587:1959-69. [DOI: 10.1016/j.febslet.2013.05.011] [Citation(s) in RCA: 87] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2013] [Revised: 05/02/2013] [Accepted: 05/02/2013] [Indexed: 10/26/2022]
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23
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Veloso A, Kerman K. Advances in electrochemical detection for study of neurodegenerative disorders. Anal Bioanal Chem 2013; 405:5725-41. [DOI: 10.1007/s00216-013-6904-3] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2012] [Revised: 03/05/2013] [Accepted: 03/06/2013] [Indexed: 12/30/2022]
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Arrigo AP. Pathology-dependent effects linked to small heat shock proteins expression: an update. Scientifica (Cairo) 2012; 2012:185641. [PMID: 24278676 PMCID: PMC3820616 DOI: 10.6064/2012/185641] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/13/2012] [Accepted: 09/17/2012] [Indexed: 06/02/2023]
Abstract
Small heat shock proteins (small Hsps) are stress-induced molecular chaperones that act as holdases towards polypeptides that have lost their folding in stress conditions or consequently of mutations in their coding sequence. A cellular protection against the deleterious effects mediated by damaged proteins is thus provided to cells. These chaperones are also highly expressed in response to protein conformational and inflammatory diseases and cancer pathologies. Through specific and reversible modifications in their phospho-oligomeric organization, small Hsps can chaperone appropriate client proteins in order to provide cells with resistance to different types of injuries or pathological conditions. By helping cells to better cope with their pathological status, their expression can be either beneficial, such as in diseases characterized by pathological cell degeneration, or deleterious when they are required for tumor cell survival. Moreover, small Hsps are actively released by cells and can act as immunogenic molecules that have dual effects depending on the pathology. The cellular consequences linked to their expression levels and relationships with other Hsps as well as therapeutic strategies are discussed in view of their dynamic structural organization required to interact with specific client polypeptides.
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Affiliation(s)
- A.-P. Arrigo
- Apoptosis Cancer and Development Laboratory, Lyon Cancer Research Center, INSERM U1052-CNRS UMR5286, Centre Léon Bérard, Claude Bernard University Lyon1, 28 Rue Laennec, 69008 Lyon, France
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25
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Ciocca DR, Arrigo AP, Calderwood SK. Heat shock proteins and heat shock factor 1 in carcinogenesis and tumor development: an update. Arch Toxicol 2012; 87:19-48. [PMID: 22885793 DOI: 10.1007/s00204-012-0918-z] [Citation(s) in RCA: 194] [Impact Index Per Article: 16.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2012] [Accepted: 07/25/2012] [Indexed: 12/20/2022]
Abstract
Heat shock proteins (HSP) are a subset of the molecular chaperones, best known for their rapid and abundant induction by stress. HSP genes are activated at the transcriptional level by heat shock transcription factor 1 (HSF1). During the progression of many types of cancer, this heat shock transcriptional regulon becomes co-opted by mechanisms that are currently unclear, although evidently triggered in the emerging tumor cell. Concerted activation of HSF1 and the accumulation of HSPs then participate in many of the traits that permit the malignant phenotype. Thus, cancers of many histologies exhibit activated HSF1 and increased HSP levels that may help to deter tumor suppression and evade therapy in the clinic. We review here the extensive work that has been carried out and is still in progress aimed at (1) understanding the oncogenic mechanisms by which HSP genes are switched on, (2) determining the roles of HSF1/HSP in malignant transformation and (3) discovering approaches to therapy based on disrupting the influence of the HSF1-controlled transcriptome in cancer.
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Affiliation(s)
- Daniel R Ciocca
- Oncology Laboratory, Institute of Experimental Medicine and Biology of Cuyo (IMBECU), Scientific and Technological Center (CCT), CONICET, 5500 Mendoza, Argentina.
| | - Andre Patrick Arrigo
- Apoptosis Cancer and Development, Cancer Research Center of Lyon (CRCL), UMR INSERM 1052-CNRS 5286, Claude Bernard University, Lyon-1, Cheney A Building, Centre Regional Léon Bérard, 28, rue Laennec 69008 LYON, France. ;
| | - Stuart K Calderwood
- Molecular and Cellular Radiation Oncology, Department of Radiation Oncology, Beth Israel Deaconess Medical Center, Boston, MA02215
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26
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Ramshini H, Ebrahim-Habibi A. Thermal disaggregation of type B yeast hexokinase by indole derivatives: a mechanistic study. Int J Biol Macromol 2012; 50:1260-6. [PMID: 22421217 DOI: 10.1016/j.ijbiomac.2012.02.016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2011] [Revised: 02/14/2012] [Accepted: 02/14/2012] [Indexed: 10/28/2022]
Abstract
Protein aggregation is a pathological hallmark of several human disorders, and a central problem in biotechnology, occurring during purification, sterilization, shipping and storage of protein structures. The process is a very complex one, characterized with a remarkable polymorphism of aggregates, including soluble amyloid oligomers, amyloid fibrils and amorphous species. While amyloid structure formation has been extensively investigated during the recent years, amorphous aggregation is still not well characterized. Use of small molecules that affect this process could be informative in this regard. In order to explore the inhibiting effect of small molecules on the amorphous aggregate formation, yeast hexokinase-B, a key enzyme in metabolism, has been chosen for the present study. Thermal aggregation of the enzyme was investigated in 50 mM phosphate buffer, pH 7 at 55°C and the extent of aggregation was measured by monitoring the increase in absorbance at 350 nm versus time. Possible anti-aggregation effects of a variety of non-specific ligands including indole, tryptophan, carbinol, and indomethacin were explored. Turbidity of the protein solutions was found to be diminished by the presence of these small molecules in the above conditions, with the highest effects being exerted by indomethacin. Dynamic light scattering and HPLC confirmed that indomethacin had the highest anti-aggregation effect. These observations, taken together, suggest that the indole ring is likely to play an important role in aggregation inhibition.
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Affiliation(s)
- Hassan Ramshini
- Department of Biology, Payame Noor University, Tehran, Iran.
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27
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Roman SG, Chebotareva NA, Kurganov BI. Concentration dependence of chaperone-like activities of α-crystallin, αB-crystallin and proline. Int J Biol Macromol 2012; 50:1341-5. [DOI: 10.1016/j.ijbiomac.2012.03.015] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2011] [Revised: 03/16/2012] [Accepted: 03/22/2012] [Indexed: 01/03/2023]
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28
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Braun J, Renggli K, Razumovitch J, Vebert C. Dynamic Light Scattering in Supramolecular Materials Chemistry. Supramol Chem 2012. [DOI: 10.1002/9780470661345.smc039] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Hirano A, Yoshikawa H, Matsushita S, Yamada Y, Shiraki K. Adsorption and disruption of lipid bilayers by nanoscale protein aggregates. Langmuir 2012; 28:3887-3895. [PMID: 22276744 DOI: 10.1021/la204717c] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Nanoparticles taken into biological systems can have biological impacts through their interactions with cell membranes, accompanied by protein adsorption onto the nanoparticle surfaces, forming a so-called protein corona. Our current research aims to demonstrate that nanoscale protein aggregates behave like such nanoparticles with regard to the interaction with lipid membranes. In this study, the adsorption and disruption of the lipid membranes by protein aggregates were investigated using amyloid fibrils and nanoscale thermal aggregates of lysozyme. Both types of protein aggregates had disruptive effects on the negatively charged liposomes, similar to polycationic nanoparticles. Interestingly, adsorption of liposomes on the amyloid fibrils preceding disruption occurred even if the net charge of the liposome was zero, suggesting the importance of hydrophobic interactions in addition to electrostatic interactions. The results of the present study provide new insights into the biological impacts of nanoparticles in vivo.
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Affiliation(s)
- Atsushi Hirano
- Nanosystem Research Institute, National Institute of Advanced Industrial Science and Technology, Tsukuba, Ibaraki 305-8562, Japan
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Maloletkina OI, Markossian KA, Chebotareva NA, Asryants RA, Kleymenov SY, Poliansky NB, Muranov KO, Makeeva VF, Kurganov BI. Kinetics of aggregation of UV-irradiated glyceraldehyde-3-phosphate dehydrogenase from rabbit skeletal muscle. Effect of agents possessing chaperone-like activity. Biophys Chem 2012; 163-164:11-20. [PMID: 22377264 DOI: 10.1016/j.bpc.2012.02.001] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2011] [Revised: 01/30/2012] [Accepted: 02/04/2012] [Indexed: 10/14/2022]
Abstract
An aggregation test system based on the aggregation of UV-irradiated glyceraldehyde-3-phosphate dehydrogenase (GAPDH) from rabbit skeletal muscle has been proposed. On the basis of the measurements of the enzyme activity and differential scanning calorimetry data a conclusion has been made that UV radiation results in formation of damaged protein molecules with lower thermostability. It was shown that the order of aggregation rate for UV-irradiated GAPDH with respect to the protein was close to 2. This means that such a test system allows detecting the effect of various agents exclusively on the stage of aggregation of unfolded protein molecules. The influence of α-crystallin and 2-hydroxypropyl-β-cyclodextrin (HP-β-CD) on aggregation of UV-irradiated GAPDH was studied. Despite the fact that HP-β-CD accelerates thermal aggregation of non-irradiated GAPDH, in the case of aggregation of UV-irradiated GAPDH HP-β-CD reveals a purely protective effect.
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Affiliation(s)
- Olga I Maloletkina
- Bach Institute of Biochemistry, Russian Academy of Sciences, Moscow, Russia
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31
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Roman SG, Chebotareva NA, Eronina TB, Kleymenov SY, Makeeva VF, Poliansky NB, Muranov KO, Kurganov BI. Does the Crowded Cell-like Environment Reduce the Chaperone-like Activity of α-Crystallin? Biochemistry 2011; 50:10607-23. [DOI: 10.1021/bi201030y] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Svetlana G. Roman
- Bach Institute of Biochemistry, Russian Academy of Sciences, Leninsky pr. 33, Moscow 119071, Russia
- Department of Physics, Moscow State University, Leninskie Gory, Moscow 119992, Russia
| | - Natalia A. Chebotareva
- Bach Institute of Biochemistry, Russian Academy of Sciences, Leninsky pr. 33, Moscow 119071, Russia
| | - Tatyana B. Eronina
- Bach Institute of Biochemistry, Russian Academy of Sciences, Leninsky pr. 33, Moscow 119071, Russia
| | - Sergey Yu. Kleymenov
- Bach Institute of Biochemistry, Russian Academy of Sciences, Leninsky pr. 33, Moscow 119071, Russia
- Kol’tsov Institute of Developmental
Biology, Russian Academy of Sciences, Vavilova
st. 26, Moscow 119991, Russia
| | - Valentina F. Makeeva
- Bach Institute of Biochemistry, Russian Academy of Sciences, Leninsky pr. 33, Moscow 119071, Russia
| | - Nikolay B. Poliansky
- Emanuel Institute of Biochemical Physics, Russian Academy of Sciences, Kosygin st. 4, Moscow 119991, Russia
| | - Konstantin O. Muranov
- Emanuel Institute of Biochemical Physics, Russian Academy of Sciences, Kosygin st. 4, Moscow 119991, Russia
| | - Boris I. Kurganov
- Bach Institute of Biochemistry, Russian Academy of Sciences, Leninsky pr. 33, Moscow 119071, Russia
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Eronina T, Borzova V, Maloletkina O, Kleymenov S, Asryants R, Markossian K, Kurganov B. A protein aggregation based test for screening of the agents affecting thermostability of proteins. PLoS One 2011; 6:e22154. [PMID: 21760963 DOI: 10.1371/journal.pone.0022154] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2010] [Accepted: 06/19/2011] [Indexed: 11/30/2022] Open
Abstract
To search for agents affecting thermal stability of proteins, a test based on the registration of protein aggregation in the regime of heating with a constant rate was used. The initial parts of the dependences of the light scattering intensity (I) on temperature (T) were analyzed using the following empiric equation: I = Kagg(T−T0)2, where Kagg is the parameter characterizing the initial rate of aggregation and T0 is a temperature at which the initial increase in the light scattering intensity is registered. The aggregation data are interpreted in the frame of the model assuming the formation of the start aggregates at the initial stages of the aggregation process. Parameter T0 corresponds to the moment of the origination of the start aggregates. The applicability of the proposed approach was demonstrated on the examples of thermal aggregation of glycogen phosphorylase b from rabbit skeletal muscles and bovine liver glutamate dehydrogenase studied in the presence of agents of different chemical nature. The elaborated approach to the study of protein aggregation may be used for rapid identification of small molecules that interact with protein targets.
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Tomita S, Yoshikawa H, Shiraki K. Arginine controls heat-induced cluster-cluster aggregation of lysozyme at around the isoelectric point. Biopolymers 2011; 95:695-701. [DOI: 10.1002/bip.21637] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2011] [Revised: 04/08/2011] [Accepted: 04/11/2011] [Indexed: 12/11/2022]
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Del Bigio MR, Chudley AE, Sarnat HB, Campbell C, Goobie S, Chodirker BN, Selcen D. Infantile muscular dystrophy in Canadian aboriginals is an αB-crystallinopathy. Ann Neurol 2011; 69:866-71. [PMID: 21337604 DOI: 10.1002/ana.22331] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2010] [Revised: 10/12/2010] [Accepted: 11/05/2010] [Indexed: 11/10/2022]
Abstract
OBJECTIVE A recessively transmitted fatal hypertonic infantile muscular dystrophy has been described in Canadian aboriginals. The affected infants present with progressive limb and axial muscle stiffness and develop severe respiratory insufficiency, and most die in the first year of life. We sought to determine the genetic basis of this disease. METHODS We performed histochemical, immunocytochemical, electron microscopy, and molecular genetic studies in a cohort of 12 patients affected by this disease. RESULTS Conventional histochemical and electron microscopy studies suggested myofibrillar myopathy (MFM). Therefore, we searched for ectopic expression of multiple proteins typical of MFM. Alpha B-crystallin (αBC) expression was absent from all fibers using a monoclonal antibody raised against the entire protein. However, a monoclonal antibody directed against the first 10 residues of αBC immunostained portions of abnormal fibers. Pursuing this clue, we searched for mutations in the gene for αBC (CRYAB) in available DNA samples of 8 patients. All harbored a homozygous deletion, c.60C, predicting a Ser to Ala change at codon 21 and a stop codon after 23 missense residues (p.Ser21AlafsX24). Clinically unaffected parents were heterozygous for this mutation. INTERPRETATION The homozygous c.60delC in CRYAB pinpoints the genetic basis of the fatal infantile hypertonic muscular dystrophy of Canadian aboriginals. MFMs are typically transmitted by dominant inheritance, but in this disease the parental phenotype is rescued by limited expression of the highly truncated nonfunctional mutant gene product. The severe patient phenotype is due to homozygosity for the markedly hypomorphic allele. Ann Neurol, 2011.
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Affiliation(s)
- Marc R Del Bigio
- Department of Pathology, University of Manitoba, Winnipeg, Canada
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Abstract
Human HspB1 (also denoted Hsp27) is a well-known member, together with alphaB-crystallin, of the small heat-shock (or stress) proteins (sHsps) (20-40 kDa). In this chapter, I describe procedures for testing the oligomeric and phosphorylation patterns of HspB1 as well as its interaction with specific partner/client polypeptides using tissue culture cells genetically modified to express different levels of this protein. The procedures have been developed in my laboratory and could be used in any well-established cellular laboratory. In addition, the different procedures presented here could be extended to test the nine other human sHsp members as well as sHsps from other species.
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Chen Q, Yan M, Xiang F, Zhou X, Liu Y, Zheng F. Characterization of a mutant R11H αB-crystallin associated with human inherited cataract. Biol Chem 2010; 391:1391-400. [DOI: 10.1515/bc.2010.143] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
αB-Crystallin plays an important part in cataract development. A novel mutation (R11H) was previously detected by our group. In the present study, we set out to investigate the possible molecular mechanism by which the R11H mutation causes cataract. We found that the mutant αB-crystallin exhibits folding defects, decreased surface hydrophobicity and enhanced chaperone-like activity compared with the wild-type αB-crystallin. The mutant protein shows nearly the same molecular mass and thermal stability as the wild-type form. Transfection studies revealed that the R11H mutant was remarkably similar to the wild-type protein in its subcellular distribution, but has an abnormal ability to induce cell apoptosis. These results suggest that the changes in hydrophobic exposure and the abnormal ability to induce programmed cell death of the mutant protein are likely to be responsible for the onset of cataract.
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Muranov KO, Maloletkina OI, Poliansky NB, Markossian KA, Kleymenov SY, Rozhkov SP, Goryunov AS, Ostrovsky MA, Kurganov BI. Mechanism of aggregation of UV-irradiated β(L)-crystallin. Exp Eye Res 2010; 92:76-86. [PMID: 21093434 DOI: 10.1016/j.exer.2010.11.005] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2010] [Revised: 11/09/2010] [Accepted: 11/09/2010] [Indexed: 11/19/2022]
Abstract
Thermal denaturation and aggregation of UV-irradiated β(L)-crystallin from eye lenses of steers have been studied. The data on size-exclusion chromatography and SDS-PAGE indicated that UV irradiation of β(L)-crystallin at 10 °С resulted in fragmentation of the protein molecule and formation of cross-linked aggregates. Fluorescence data showed that tryptophan fluorescence in the irradiated protein decreased exponentially with the UV dose. Decrease in tryptophan fluorescence is a result of photochemical destruction, but not of conformational changes of protein, because there is no red shift in the fluorescence maximum. The differential scanning calorimetry (DSC) profiles of the samples of UV-irradiated and wild type β(L)-crystallin were registered. The area under curves, which is proportional to the amount of the native protein, decreased exponentially with increasing the irradiation dose. The shape of the DSC profiles for the samples of UV-irradiated β(L)-crystallin was identical to that for wild type β(L)-crystallin. The DSC data allowed estimating the portion of UV-denatured β(L)-crystallin, which is not registered by DSC, and the portion of the combined fraction consisting of native and UV-damaged molecules retaining the native structure. A conclusion has been made that UV-induced denaturation of β(L)-crystallin follows the one-hit model. The study of the kinetics of thermal aggregation of UV-irradiated β(L)-crystallin at 37 °С using dynamic light scattering showed that the initial stage of aggregation was that of formation of the start aggregates with the hydrodynamic radius of 20 nm. Further sticking of the start aggregates proceeded in the regime of reaction-limited cluster-cluster aggregation. Splitting of the aggregate population into two components occurred above a definite point in time.
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Affiliation(s)
- Konstantin O Muranov
- Emanuel Institute of Biochemical Physics, Russian Academy of Sciences, Moscow, Russia.
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Bumagina Z, Gurvits B, Artemova N, Muranov K, Kurganov B. Paradoxical acceleration of dithiothreitol-induced aggregation of insulin in the presence of a chaperone. Int J Mol Sci 2010; 11:4556-79. [PMID: 21151456 PMCID: PMC3000100 DOI: 10.3390/ijms11114556] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2010] [Revised: 10/21/2010] [Accepted: 11/09/2010] [Indexed: 11/29/2022] Open
Abstract
The kinetics of dithiothreitol (DTT)-induced aggregation of human recombinant insulin and the effect of α-crystallin, a representative of the family of small heat shock proteins, on the aggregation process have been studied using dynamic light scattering technique. Analysis of the distribution of the particles by size measured in the course of aggregation showed that the initial stage of the aggregation process was the stage of formation of the start aggregates with a hydrodynamic radius (R(h)) of about 90 nm. When studying the effect of α-crystallin on the rate of DTT-induced aggregation of insulin, it was demonstrated that low concentrations of α-crystallin dramatically accelerated the aggregation process, whereas high concentrations of α-crystallin suppressed insulin aggregation. In the present study, at the molar stoichiometric ratio (insulin:α-crystallin) less than 1:0.5, a pronounced accelerating effect of α-crystallin was observed; whereas a ratio exceeding the value of 1:0.6 caused suppression of insulin aggregation. The mechanisms underlying the dual effect of α-crystallin have been proposed. It is assumed that heterogeneous nucleation occurring on the surface of the α-crystallin particle plays the key role in the paradoxical acceleration of insulin aggregation by α-crystallin that may provide an alternative biologically significant pathway of the aggregation process.
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Affiliation(s)
- Zoya Bumagina
- A. N. Bakh Institute of Biochemistry, Russian Academy of Sciences, Leninsky prospect 33, Moscow 119071, Russia; E-Mails: (Z.B.); (N.A.); (B.K.)
| | - Bella Gurvits
- A. N. Bakh Institute of Biochemistry, Russian Academy of Sciences, Leninsky prospect 33, Moscow 119071, Russia; E-Mails: (Z.B.); (N.A.); (B.K.)
| | - Natalya Artemova
- A. N. Bakh Institute of Biochemistry, Russian Academy of Sciences, Leninsky prospect 33, Moscow 119071, Russia; E-Mails: (Z.B.); (N.A.); (B.K.)
| | - Konstantin Muranov
- Emanuel Institute of Biochemical Physics, Russian Academy of Sciences, Kosygina 4, Moscow 119991, Russia; E-Mail:
| | - Boris Kurganov
- A. N. Bakh Institute of Biochemistry, Russian Academy of Sciences, Leninsky prospect 33, Moscow 119071, Russia; E-Mails: (Z.B.); (N.A.); (B.K.)
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Markov DI, Zubov EO, Nikolaeva OP, Kurganov BI, Levitsky DI. Thermal denaturation and aggregation of myosin subfragment 1 isoforms with different essential light chains. Int J Mol Sci 2010; 11:4194-226. [PMID: 21151434 PMCID: PMC3000078 DOI: 10.3390/ijms11114194] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2010] [Revised: 10/08/2010] [Accepted: 10/22/2010] [Indexed: 11/16/2022] Open
Abstract
We compared thermally induced denaturation and aggregation of two isoforms of the isolated myosin head (myosin subfragment 1, S1) containing different “essential” (or “alkali”) light chains, A1 or A2. We applied differential scanning calorimetry (DSC) to investigate the domain structure of these two S1 isoforms. For this purpose, a special calorimetric approach was developed to analyze the DSC profiles of irreversibly denaturing multidomain proteins. Using this approach, we revealed two calorimetric domains in the S1 molecule, the more thermostable domain denaturing in two steps. Comparing the DSC data with temperature dependences of intrinsic fluorescence parameters and S1 ATPase inactivation, we have identified these two calorimetric domains as motor domain and regulatory domain of the myosin head, the motor domain being more thermostable. Some difference between the two S1 isoforms was only revealed by DSC in thermal denaturation of the regulatory domain. We also applied dynamic light scattering (DLS) to analyze the aggregation of S1 isoforms induced by their thermal denaturation. We have found no appreciable difference between these S1 isoforms in their aggregation properties under ionic strength conditions close to those in the muscle fiber (in the presence of 100 mM KCl). Under these conditions kinetics of this process was independent of protein concentration, and the aggregation rate was limited by irreversible denaturation of the S1 motor domain.
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Affiliation(s)
- Denis I. Markov
- A.N. Bach Institute of Biochemistry, Russian Academy of Sciences, Leninsky prosp. 33, 119071, Moscow, Russia; E-Mails: (D.I.M.); (E.O.Z.); (B.I.K.)
| | - Eugene O. Zubov
- A.N. Bach Institute of Biochemistry, Russian Academy of Sciences, Leninsky prosp. 33, 119071, Moscow, Russia; E-Mails: (D.I.M.); (E.O.Z.); (B.I.K.)
| | - Olga P. Nikolaeva
- A.N. Belozersky Institute of Physico-Chemical Biology, Moscow State University, 119992, Moscow, Russia; E-Mail: (O.P.N.)
| | - Boris I. Kurganov
- A.N. Bach Institute of Biochemistry, Russian Academy of Sciences, Leninsky prosp. 33, 119071, Moscow, Russia; E-Mails: (D.I.M.); (E.O.Z.); (B.I.K.)
| | - Dmitrii I. Levitsky
- A.N. Bach Institute of Biochemistry, Russian Academy of Sciences, Leninsky prosp. 33, 119071, Moscow, Russia; E-Mails: (D.I.M.); (E.O.Z.); (B.I.K.)
- A.N. Belozersky Institute of Physico-Chemical Biology, Moscow State University, 119992, Moscow, Russia; E-Mail: (O.P.N.)
- Author to whom correspondence should be addressed; E-Mail: ; Fax: +7-495-954-2732
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Santiago PS, Carvalho JW, Domingues MM, Santos NC, Tabak M. Thermal stability of extracellular hemoglobin of Glossoscolex paulistus: determination of activation parameters by optical spectroscopic and differential scanning calorimetric studies. Biophys Chem 2010; 152:128-38. [PMID: 20875698 DOI: 10.1016/j.bpc.2010.08.010] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2010] [Revised: 08/24/2010] [Accepted: 08/31/2010] [Indexed: 11/20/2022]
Abstract
Glossoscolex paulistus hemoglobin (HbGp) was studied by dynamic light scattering (DLS), optical absorption spectroscopy (UV-VIS) and differential scanning calorimetry (DSC). At pH 7.0, cyanomet-HbGp is very stable, no oligomeric dissociation is observed, while denaturation occurs at 56°C, 4°C higher as compared to oxy-HbGp. The oligomeric dissociation of HbGp occurs simultaneously with some protein aggregation. Kinetic studies for oxy-HbGp using UV-VIS and DLS allowed to obtain activation energy (E(a)) values of 278-262 kJ/mol (DLS) and 333 kJ/mol (UV-VIS). Complimentary DSC studies indicate that the denaturation is irreversible, giving endotherms strongly dependent upon the heating scan rates, suggesting a kinetically controlled process. Dependence on protein concentration suggests that the two components in the endotherms are due to oligomeric dissociation effect upon denaturation. Activation energies are in the range 200-560 kJ/mol. The mid-point transition temperatures were in the range 50-65 °C. Cyanomet-HbGp shows higher mid-point temperatures as well as activation energies, consistent with its higher stability. DSC data are reported for the first time for an extracellular hemoglobin.
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Pang M, Su JT, Feng S, Tang ZW, Gu F, Zhang M, Ma X, Yan YB. Effects of congenital cataract mutation R116H on αA-crystallin structure, function and stability. Biochimica et Biophysica Acta (BBA) - Proteins and Proteomics 2010; 1804:948-56. [PMID: 20079887 DOI: 10.1016/j.bbapap.2010.01.001] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/20/2009] [Revised: 12/11/2009] [Accepted: 01/07/2010] [Indexed: 10/20/2022]
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Maloletkina OI, Markossian KA, Asryants RA, Semenyuk PI, Makeeva VF, Kurganov BI. Effect of 2-hydroxypropyl-beta-cyclodextrin on thermal inactivation, denaturation and aggregation of glyceraldehyde-3-phosphate dehydrogenase from rabbit skeletal muscle. Int J Biol Macromol 2010; 46:487-92. [PMID: 20338194 DOI: 10.1016/j.ijbiomac.2010.03.008] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2010] [Revised: 03/12/2010] [Accepted: 03/16/2010] [Indexed: 11/20/2022]
Abstract
The effect of 2-hydroxypropyl-beta-cyclodextrin (HP-beta-CD) on thermal aggregation of glyceraldehyde-3-phosphate dehydrogenase (GAPDH) from rabbit skeletal muscle at 45 degrees C has been studied using dynamic light scattering. In the presence of HP-beta-CD higher values of the rate of aggregation and larger aggregates were registered. The acceleration of GAPDH aggregation was due to destabilization of the enzyme molecule under the action of HP-beta-CD. This is evidenced by the data on thermal inactivation of GAPDH and differential scanning calorimetry.
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Maloletkina OI, Markossian KA, Belousova LV, Kleimenov SY, Orlov VN, Makeeva VF, Kurganov BI. Thermal stability and aggregation of creatine kinase from rabbit skeletal muscle. Effect of 2-hydroxypropyl-beta-cyclodextrin. Biophys Chem 2010; 148:121-30. [PMID: 20378240 DOI: 10.1016/j.bpc.2010.03.005] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2009] [Revised: 03/03/2010] [Accepted: 03/05/2010] [Indexed: 11/28/2022]
Abstract
Effect of 2-hydroxypropyl-beta-cyclodextrin (HP-beta-CD) on thermal aggregation of creatine kinase from rabbit skeletal muscle (RMCK) at 48 degrees C has been studied using dynamic light scattering. An increase in the duration of the lag period on the kinetic curves of aggregation, registered as an increment of the light scattering intensity in time, has been observed in the presence of HP-beta-CD. It has been shown that the initial parts of the dependences of the hydrodynamic radius (R(h)) of the protein aggregates on time follow the exponential law. The reciprocal value of parameter t(2R) (t(2R) is the time interval over which the R(h) value is doubled) was used to characterize the rate of aggregation. A 10-fold decrease in the 1/t(2R) value was observed in the presence of 76mM HP-beta-CD. Judging from the data on the kinetics of RMCK inactivation and the data on differential scanning calorimetry of RMCK, HP-beta-CD does not affect the rate of RMCK unfolding.
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Affiliation(s)
- Olga I Maloletkina
- Bach Institute of Biochemistry, Russian Academy of Sciences, Moscow, Russia
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Markossian KA, Golub NV, Chebotareva NA, Asryants RA, Naletova IN, Muronetz VI, Muranov KO, Kurganov BI. Comparative analysis of the effects of alpha-crystallin and GroEL on the kinetics of thermal aggregation of rabbit muscle glyceraldehyde-3-phosphate dehydrogenase. Protein J 2010; 29:11-25. [PMID: 19936900 DOI: 10.1007/s10930-009-9217-9] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Effects of alpha-crystallin and GroEL on the kinetics of thermal aggregation of rabbit muscle glyceraldehyde-3-phosphate dehydrogenase (GAPDH) have been studied using dynamic light scattering and analytical ultracentrifugation. The analysis of the initial parts of the dependences of the hydrodynamic radius of protein aggregates on time shows that in the presence of alpha-crystallin or GroEL the kinetic regime of GAPDH aggregation is changed from the regime of diffusion-limited cluster-cluster aggregation to the regime of reaction-limited cluster-cluster aggregation, wherein the sticking probability for the colliding particles becomes lower the unity. In contrast to alpha-crystallin, GroEL does not interfere with formation of the start aggregates which include denatured GAPDH molecules. On the basis of the analytical ultracentrifugation data the conclusion has been made that the products of dissociation of GAPDH and alpha-crystallin or GroEL play an important role in the interactions of GAPDH and chaperones at elevated temperatures.
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Affiliation(s)
- Kira A Markossian
- Bach Institute of Biochemistry, Russian Academy of Sciences, 119071, Moscow, Russia.
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45
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Bumagina ZM, Gurvits BY, Artemova NV, Muranov KO, Yudin IK, Kurganov BI. Mechanism of suppression of dithiothreitol-induced aggregation of bovine alpha-lactalbumin by alpha-crystallin. Biophys Chem 2009; 146:108-17. [PMID: 19954880 DOI: 10.1016/j.bpc.2009.11.002] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2009] [Revised: 11/10/2009] [Accepted: 11/11/2009] [Indexed: 11/16/2022]
Abstract
The kinetics of dithiothreitol (DTT)-induced aggregation of alpha-lactalbumin from bovine milk has been studied using dynamic light-scattering technique. Analysis of the distribution of the particles formed in the solution of alpha-lactalbumin after the addition of DTT by size showed that the initial stage of the aggregation process was the stage of formation of the start aggregates with the hydrodynamic radius (R(h)) of 80-100nm. Further growth of the protein aggregates proceeds as a result of sticking of the start aggregates. Suppression of alpha-lactalbumin aggregation by alpha-crystallin is mainly due to the increase in the duration of the lag period on the kinetic curves of aggregation. It is assumed that the initially formed complexes of unfolded alpha-lactalbumin with alpha-crystallin were transformed to the primary clusters prone to aggregation as a result of the redistribution of the denatured protein molecules on the surface of the alpha-crystallin particles.
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Affiliation(s)
- Zoya M Bumagina
- A.N. Bakh Institute of Biochemistry, Russian Academy of Sciences, Moscow, Russia
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Marchenkov VV, Semisotnov GV. GroEL-assisted protein folding: does it occur within the chaperonin inner cavity? Int J Mol Sci 2009; 10:2066-83. [PMID: 19564940 DOI: 10.3390/ijms10052066] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2009] [Revised: 05/08/2009] [Accepted: 05/11/2009] [Indexed: 11/22/2022] Open
Abstract
The folding of protein molecules in the GroEL inner cavity under the co-chaperonin GroES lid is widely accepted as a crucial event of GroEL-assisted protein folding. This review is focused on the data showing that GroEL-assisted protein folding may proceed out of the complex with the chaperonin. The models of GroEL-assisted protein folding assuming ligand-controlled dissociation of nonnative proteins from the GroEL surface and their folding in the bulk solution are also discussed.
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