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Borzova VA, Chernikov AM, Mikhaylova VV, Kurganov BI. Change in the Kinetic Regime of Aggregation of Yeast Alcohol Dehydrogenase in the Presence of 2-Hydroxypropyl-β-cyclodextrin. Int J Mol Sci 2023; 24:16140. [PMID: 38003330 PMCID: PMC10671268 DOI: 10.3390/ijms242216140] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2023] [Revised: 11/05/2023] [Accepted: 11/07/2023] [Indexed: 11/26/2023] Open
Abstract
Chemical chaperones are low-molecular-weight compounds that suppress protein aggregation. They can influence different stages of the aggregation process-the stage of protein denaturation, the nucleation stage and the stage of aggregate growth-and this may lead to a change in the aggregation kinetic regime. Here, the possibility of changing the kinetic regime in the presence of a chemical chaperone 2-hydroxypropyl-β-cyclodextrin (2-HP-β-CD) was investigated for a test system based on the thermally induced aggregation of yeast alcohol dehydrogenase (yADH) at 56 °C. According to differential scanning calorimetry data, 2-HP-β-CD did not affect the stage of the protein molecule unfolding. Dynamic light scattering data indicated changes in the aggregation kinetics of yADH during the nucleation and aggregate growth stages in the presence of the chaperone. The analysis of kinetic curves showed that the order of aggregation with respect to protein (nc), calculated for the stage of aggregate growth, changed from nc = 1 to nc = 2 with the addition of 100 mM 2-HP-β-CD. The mechanism of 2-HP-β-CD action on the yADH thermal aggregation leading to a change in its kinetic regime of aggregation is discussed.
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Affiliation(s)
- Vera A. Borzova
- Bach Institute of Biochemistry, Federal Research Centre “Fundamentals of Biotechnology” of the Russian Academy of Sciences, Leninsky pr. 33, 119071 Moscow, Russia; (A.M.C.); (V.V.M.)
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Borzova VA, Eronina TB, Mikhaylova VV, Roman SG, Chernikov AM, Chebotareva NA. Effect of Chemical Chaperones on the Stability of Proteins during Heat- or Freeze-Thaw Stress. Int J Mol Sci 2023; 24:10298. [PMID: 37373447 DOI: 10.3390/ijms241210298] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2023] [Revised: 06/15/2023] [Accepted: 06/16/2023] [Indexed: 06/29/2023] Open
Abstract
The importance of studying the structural stability of proteins is determined by the structure-function relationship. Protein stability is influenced by many factors among which are freeze-thaw and thermal stresses. The effect of trehalose, betaine, sorbitol and 2-hydroxypropyl-β-cyclodextrin (HPCD) on the stability and aggregation of bovine liver glutamate dehydrogenase (GDH) upon heating at 50 °C or freeze-thawing was studied by dynamic light scattering, differential scanning calorimetry, analytical ultracentrifugation and circular dichroism spectroscopy. A freeze-thaw cycle resulted in the complete loss of the secondary and tertiary structure, and aggregation of GDH. All the cosolutes suppressed freeze-thaw- and heat-induced aggregation of GDH and increased the protein thermal stability. The effective concentrations of the cosolutes during freeze-thawing were lower than during heating. Sorbitol exhibited the highest anti-aggregation activity under freeze-thaw stress, whereas the most effective agents stabilizing the tertiary structure of GDH were HPCD and betaine. HPCD and trehalose were the most effective agents suppressing GDH thermal aggregation. All the chemical chaperones stabilized various soluble oligomeric forms of GDH against both types of stress. The data on GDH were compared with the effects of the same cosolutes on glycogen phosphorylase b during thermal and freeze-thaw-induced aggregation. This research can find further application in biotechnology and pharmaceutics.
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Affiliation(s)
- Vera A Borzova
- Bach Institute of Biochemistry, Federal Research Centre "Fundamentals of Biotechnology" of the Russian Academy of Sciences, Leninsky pr. 33, 119071 Moscow, Russia
| | - Tatiana B Eronina
- Bach Institute of Biochemistry, Federal Research Centre "Fundamentals of Biotechnology" of the Russian Academy of Sciences, Leninsky pr. 33, 119071 Moscow, Russia
| | - Valeriya V Mikhaylova
- Bach Institute of Biochemistry, Federal Research Centre "Fundamentals of Biotechnology" of the Russian Academy of Sciences, Leninsky pr. 33, 119071 Moscow, Russia
| | - Svetlana G Roman
- Bach Institute of Biochemistry, Federal Research Centre "Fundamentals of Biotechnology" of the Russian Academy of Sciences, Leninsky pr. 33, 119071 Moscow, Russia
| | - Andrey M Chernikov
- Bach Institute of Biochemistry, Federal Research Centre "Fundamentals of Biotechnology" of the Russian Academy of Sciences, Leninsky pr. 33, 119071 Moscow, Russia
| | - Natalia A Chebotareva
- Bach Institute of Biochemistry, Federal Research Centre "Fundamentals of Biotechnology" of the Russian Academy of Sciences, Leninsky pr. 33, 119071 Moscow, Russia
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Eronina TB, Mikhaylova VV, Chebotareva NA, Shubin VV, Sluchanko NN, Kurganov BI. Comparative effects of trehalose and 2-hydroxypropyl-β-cyclodextrin on aggregation of UV-irradiated muscle glycogen phosphorylase b. Biochimie 2019; 165:196-205. [DOI: 10.1016/j.biochi.2019.08.006] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2019] [Accepted: 08/06/2019] [Indexed: 01/14/2023]
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Artificial chaperones based on thermoresponsive polymers recognize the unfolded state of the protein. Int J Biol Macromol 2018; 121:536-545. [PMID: 30312700 DOI: 10.1016/j.ijbiomac.2018.10.031] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2018] [Accepted: 10/08/2018] [Indexed: 11/23/2022]
Abstract
Stabilization of the enzymes under stress conditions is of special interest for modern biochemistry, bioengineering, as well as for formulation and target delivery of protein-based drugs. Aiming to achieve an efficient stabilization at elevated temperature with no influence on the enzyme under normal conditions, we studied chaperone-like activity of thermoresponsive polymers based on poly(dimethylaminoethyl methacrylate) (PDMAEMA) toward two different proteins, glyceraldehyde-3-phosphate dehydrogenase and chicken egg lysozyme. The polymers has been shown to do not interact with the folded protein at room temperature but form a complex upon heating to either protein unfolding or polymer phase transition temperature. A PDMAEMA-PEO block copolymer with a dodecyl end-group (d-PDMAEMA-PEO) as well as PDMAEMA-PEO without the dodecyl groups protected the denatured protein against aggregation in contrast to PDMAEMA homopolymer. No effect of the polymers on the enzymatic activity of the client protein was observed at room temperature. The polymers also partially protected the enzyme against inactivation at high temperature. The results provide a platform for creation of artificial chaperones with unfolded protein recognition which is a major feature of natural chaperones.
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Li S, Yuan L, Zhang B, Zhou W, Wang X, Bai D. Photostability and antioxidant activity studies on the inclusion complexes of trans-polydatin with β-cyclodextrin and derivatives. RSC Adv 2018; 8:25941-25948. [PMID: 35541971 PMCID: PMC9082899 DOI: 10.1039/c8ra04778b] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2018] [Accepted: 07/10/2018] [Indexed: 01/13/2023] Open
Abstract
The inclusion complexes of trans-polydatin and three cyclodextrins (CDs), namely β-cyclodextrin (β-CD), methyl-β-cyclodextrin (Me-β-CD) and (2-hydroxy) propyl-β-cyclodextrin (HP-β-CD) were prepared.
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Affiliation(s)
- Shujing Li
- Beijing Advanced Innovation Center for Food Nutrition and Human Health
- Beijing Technology and Business University
- Beijing 100048
- PR China
- Department of Chemistry
| | - Li Yuan
- Beijing Advanced Innovation Center for Food Nutrition and Human Health
- Beijing Technology and Business University
- Beijing 100048
- PR China
- Department of Chemistry
| | - Bing Zhang
- Technical Institute of Physics and Chemistry
- Chinese Academy of Science
- Beijing 100190
- PR China
| | - Wei Zhou
- Beijing Advanced Innovation Center for Food Nutrition and Human Health
- Beijing Technology and Business University
- Beijing 100048
- PR China
- Department of Chemistry
| | - Xinrui Wang
- Beijing Advanced Innovation Center for Food Nutrition and Human Health
- Beijing Technology and Business University
- Beijing 100048
- PR China
- Department of Chemistry
| | - Dongsheng Bai
- Beijing Advanced Innovation Center for Food Nutrition and Human Health
- Beijing Technology and Business University
- Beijing 100048
- PR China
- Department of Chemistry
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Kurganov BI. Quantification of anti-aggregation activity of chaperones. Int J Biol Macromol 2017; 100:104-117. [DOI: 10.1016/j.ijbiomac.2016.07.066] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2016] [Revised: 07/18/2016] [Accepted: 07/21/2016] [Indexed: 12/11/2022]
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Borzova VA, Markossian KA, Kara DA, Kurganov B. Kinetic regime of dithiothreitol-induced aggregation of bovine serum albumin. Int J Biol Macromol 2015; 80:130-8. [PMID: 26116389 DOI: 10.1016/j.ijbiomac.2015.06.040] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2015] [Revised: 06/18/2015] [Accepted: 06/20/2015] [Indexed: 12/25/2022]
Abstract
A search for agents, which are capable of effectively suppressing protein aggregation, and elaboration of the appropriate test systems, are among important problems of modern biochemistry and biotechnology. One such test system is based on dithiothreitol (DTT)-induced aggregation of bovine serum albumin (BSA). Study of the kinetics of DTT-induced aggregation of BSA by asymmetric flow field flow fractionation showed that a decrease in the portion of the non-aggregated protein in time followed the exponential law, the rate constant of the first order remaining unchanged at varying protein concentration (0.1M Na-phosphate buffer, pH 7.0; 45 °C). The obtained results indicate that the rate-limiting stage of the general aggregation process is that of unfolding of the protein molecule. When studying the kinetics of DTT-induced aggregation of BSA by dynamic light scattering, we proposed to use parameter K(LS) as a measure of the initial rate of aggregation. Parameter K(LS) corresponds to the initial slope of the dependence of (I-I0)(0.5) on time (I0 and I are the initial and current values of the light scattering intensity, respectively). The K(LS) value has been applied to estimate anti-aggregation activity of chemical chaperones (arginine, its derivatives and proline).
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Affiliation(s)
- Vera A Borzova
- Bach Institute of Biochemistry, Russian Academy of Sciences, Leninsky pr. 33, Moscow 119071, Russia
| | - Kira A Markossian
- Bach Institute of Biochemistry, Russian Academy of Sciences, Leninsky pr. 33, Moscow 119071, Russia
| | - Dmitriy A Kara
- Bach Institute of Biochemistry, Russian Academy of Sciences, Leninsky pr. 33, Moscow 119071, Russia
| | - Boris Kurganov
- Bach Institute of Biochemistry, Russian Academy of Sciences, Leninsky pr. 33, Moscow 119071, Russia.
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Relationship between the initial rate of protein aggregation and the lag period for amorphous aggregation. Int J Biol Macromol 2014; 68:144-50. [PMID: 24794200 DOI: 10.1016/j.ijbiomac.2014.04.046] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2014] [Revised: 04/22/2014] [Accepted: 04/22/2014] [Indexed: 01/21/2023]
Abstract
Lag period is an inherent characteristic of the kinetic curves registered for protein aggregation. The appearance of a lag period is connected with the nucleation stage and the stages of the formation of folding or unfolding intermediates prone to aggregation (for example, the stage of protein unfolding under stress conditions). Discovering the kinetic regularities essential for elucidation of the protein aggregation mechanism comprises deducing the relationship between the lag period and aggregation rate. Fändrich proposed the following equation connecting the duration of the lag phase (tlag) and the aggregate growth rate (kg) in the amyloid fibrillation: kg=const/tlag. To establish the relationship between the initial rate of protein aggregation (v) and the lag period (t0) in the case of amorphous aggregation, the kinetics of dithithreitol-induced aggregation of holo-α-lactalbumin from bovine milk was studied (0.1M Na-phosphate buffer, pH 6.8; 37°C). The order of aggregation with respect to protein (n) was calculated from the dependence of the initial rate of protein aggregation on the α-lactalbumin concentration (n=5.3). The following equation connecting v and t0 has been proposed: v(1/n)=const/(t0-t0,lim), where t0,lim is the limiting value of t0 at high concentrations of the protein.
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Kurganov BI. Antiaggregation activity of chaperones and its quantification. BIOCHEMISTRY (MOSCOW) 2014; 78:1554-66. [DOI: 10.1134/s0006297913130129] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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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] [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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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] [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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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] [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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Serno T, Geidobler R, Winter G. Protein stabilization by cyclodextrins in the liquid and dried state. Adv Drug Deliv Rev 2011; 63:1086-106. [PMID: 21907254 DOI: 10.1016/j.addr.2011.08.003] [Citation(s) in RCA: 126] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2011] [Revised: 08/16/2011] [Accepted: 08/23/2011] [Indexed: 02/07/2023]
Abstract
Aggregation is arguably the biggest challenge for the development of stable formulations and robust manufacturing processes of therapeutic proteins. In search of novel excipients inhibiting protein aggregation, cyclodextrins and their derivatives have been under examination for use in parenteral protein products since more than 20 years and significant research work has been accomplished highlighting the great potential of cyclodextrins as stabilizers of therapeutic proteins. Oftentimes, the potential of cyclodextrins to inhibit protein aggregation has been attributed to their capability to incorporate hydrophobic residues on aggregation-prone proteins or on their partially unfolded intermediates into the hydrophobic cavity. In addition, also other mechanisms besides or even instead of complex formation play a role in the stabilization mechanism, e.g. non-ionic surfactant-like effects. In this review a comprehensive overview of the available research work on the beneficial use of cyclodextrins and their derivatives in protein formulations, liquid as well as dried, is provided. The mechanisms of stabilization against different kinds of stress conditions, such as thermal or surface-induced, are discussed in detail.
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A protein aggregation based test for screening of the agents affecting thermostability of proteins. PLoS One 2011; 6:e22154. [PMID: 21760963 PMCID: PMC3132324 DOI: 10.1371/journal.pone.0022154] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [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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Eronina TB, Chebotareva NA, Kleymenov SY, Roman SG, Makeeva VF, Kurganov BI. Effect of 2-hydroxypropyl-β-cyclodextrin on thermal stability and aggregation of glycogen phosphorylase b from rabbit skeletal muscle. Biopolymers 2010; 93:986-93. [PMID: 20540152 DOI: 10.1002/bip.21508] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
The study of the kinetics of thermal aggregation of glycogen phosphorylase b (Phb) from rabbit skeletal muscles by dynamic light scattering at 48°C showed that 2-hydroxypropyl-β-cyclodextrin (HP-β-CD) accelerated the aggregation process and induced the formation of the larger protein aggregates. The reason of the accelerating effect of HP-β-CD is destabilization of the protein molecule under action of HP-β-CD. This conclusion was supported by the data on differential scanning calorimetry and the kinetic data on thermal inactivation of Phb. It is assumed that destabilization of the Phb molecule is due to preferential binding of HP-β-CD to intermediates of protein unfolding in comparison with the original native state. The conclusion regarding the ability of the native Phb for binding of HP-β-CD was substantiated by the data on the enzyme inhibition by HP-β-CD. © 2010 Wiley Periodicals, Inc. Biopolymers 93: 986-993, 2010.
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Affiliation(s)
- Tatyana B Eronina
- Department of Structural Biochemistry of Proteins, A.N. Bach Institute of Biochemistry, Russian Academy of Sciences, Leninsky Prospect 33, Moscow 119071, Russia.
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