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Li CT, How SC, Chen ME, Lo CH, Chun MC, Chang CK, Chen WA, Wu JW, Wang SSS. Effects of glycation on human γd-crystallin proteins by different glycation-inducing agents. Int J Biol Macromol 2018; 118:442-451. [DOI: 10.1016/j.ijbiomac.2018.06.108] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2018] [Revised: 06/17/2018] [Accepted: 06/22/2018] [Indexed: 01/22/2023]
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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] [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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Wu JW, Chen ME, Wen WS, Chen WA, Li CT, Chang CK, Lo CH, Liu HS, Wang SSS. Comparative analysis of human γD-crystallin aggregation under physiological and low pH conditions. PLoS One 2014; 9:e112309. [PMID: 25389780 PMCID: PMC4229192 DOI: 10.1371/journal.pone.0112309] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2014] [Accepted: 10/04/2014] [Indexed: 11/19/2022] Open
Abstract
Cataract, a major cause of visual impairment worldwide, is the opacification of the eye’s crystalline lens due to aggregation of the crystallin proteins. The research reported here is aimed at investigating the aggregating behavior of γ-crystallin proteins in various incubation conditions. Thioflavin T binding assay, circular dichroism spectroscopy, 1-anilinonaphthalene-8-sulfonic acid fluorescence spectroscopy, intrinsic (tryptophan) fluorescence spectroscopy, light scattering, and electron microscopy were used for structural characterization. Molecular dynamics simulations and bioinformatics prediction were performed to gain insights into the γD-crystallin mechanisms of fibrillogenesis. We first demonstrated that, except at pH 7.0 and 37°C, the aggregation of γD-crystallin was observed to be augmented upon incubation, as revealed by turbidity measurements. Next, the types of aggregates (fibrillar or non-fibrillar aggregates) formed under different incubation conditions were identified. We found that, while a variety of non-fibrillar, granular species were detected in the sample incubated under pH 7.0, the fibrillogenesis of human γD-crystallin could be induced by acidic pH (pH 2.0). In addition, circular dichroism spectroscopy, 1-anilinonaphthalene-8-sulfonic acid fluorescence spectroscopy, and intrinsic fluorescence spectroscopy were used to characterize the structural and conformational features in different incubation conditions. Our results suggested that incubation under acidic condition led to a considerable change in the secondary structure and an enhancement in solvent-exposure of the hydrophobic regions of human γD-crystallin. Finally, molecular dynamics simulations and bioinformatics prediction were performed to better explain the differences between the structures and/or conformations of the human γD-crystallin samples and to reveal potential key protein region involved in the varied aggregation behavior. Bioinformatics analyses revealed that the initiation of amyloid formation of human γD-crystallin may be associated with a region within the C-terminal domain. We believe the results from this research may contribute to a better understanding of the possible mechanisms underlying the pathogenesis of senile nuclear cataract.
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Affiliation(s)
- Josephine W. Wu
- Department of Optometry, Central Taiwan University of Science and Technology, Taichung 40601, Taiwan
- * E-mail: (JWW); (SSW)
| | - Mei-Er Chen
- Department of Entomology, National Chung Hsing University, Taichung 402, Taiwan
| | - Wen-Sing Wen
- Department of Chemical Engineering, National Taiwan University, Taipei 10617, Taiwan
| | - Wei-An Chen
- Department of Chemical Engineering, National Taiwan University, Taipei 10617, Taiwan
| | - Chien-Ting Li
- Department of Chemical Engineering, National Taiwan University, Taipei 10617, Taiwan
| | - Chih-Kai Chang
- Department of Chemical Engineering, National Taiwan University, Taipei 10617, Taiwan
| | - Chun-Hsien Lo
- Department of Chemical Engineering, National Taiwan University, Taipei 10617, Taiwan
| | - Hwai-Shen Liu
- Department of Chemical Engineering, National Taiwan University, Taipei 10617, Taiwan
| | - Steven S.-S. Wang
- Department of Chemical Engineering, National Taiwan University, Taipei 10617, Taiwan
- * E-mail: (JWW); (SSW)
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Krivandin AV, Muranov KO, Yakovlev FY, Poliansky NB, Wasserman LA, Ostrovsky MA. Resistance of α-crystallin quaternary structure to UV irradiation. BIOCHEMISTRY (MOSCOW) 2009; 74:633-42. [DOI: 10.1134/s0006297909060078] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Dhir P, Akhtar NJ, Sun TX, Liang JJN. Photooxidized Products of Recombinant αA-Crystallin and W9F Mutant. Photochem Photobiol 2008. [DOI: 10.1111/j.1751-1097.1999.tb03294.x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Greinert R, Boguhn O, Harder D, Wilhelm Breitbart E, Mitchell DL, Volkmer B. The Dose Dependence of Cyclobutane Dimer Induction and Repair in UVB-irradiated Human Keratinocytes¶. Photochem Photobiol 2007. [DOI: 10.1562/0031-8655(2000)0720701tddocd2.0.co2] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Chazal M, Roux E, Alapetite C, Roulin C, Moustacchi E, Douki T, Baudouin C, Charveron M, Basset-Séguin N. Interexperimental and interindividual variations of DNA repair capacities after UV-B and UV-C irradiations of human keratinocytes and fibroblasts. Photochem Photobiol 2007. [DOI: 10.1111/j.1751-1097.2004.tb00397.x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Chazal M, Roux E, Alapetite C, Roulin C, Moustacchi E, Douki T, Baudouin C, Charveron M, Basset-Séguin N. Interexperimental and Interindividual Variations of DNA Repair Capacities After UV-B and UV-C Irradiations of Human Keratinocytes and Fibroblasts. Photochem Photobiol 2004; 79:286-90. [PMID: 15115302 DOI: 10.1562/ca-03-17.1] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
DNA repair plays a central role in the cellular response to UV. In this work we have studied the response of skin cells (i.e. fibroblasts and keratinocytes) from the same or from different individuals after both ultraviolet-B (UV-B) and ultraviolet-C (UV-C) irradiations using the comet assay to characterize the specific cellular response to UV-induced DNA damage. Cells were irradiated with increasing doses of UV-B or UV-C. To study the UV dose dependency of initial steps of DNA repair, namely recognition and incision at DNA damage level, the comet assay was performed, under alkaline conditions, 60 min after UV irradiation to allow detection of DNA strand breaks. Comparative analysis of tail moment values after UV exposure of cells from the same or from different individuals showed interexperimental and interindividual variations, implying that repeated assays are necessary to characterize the individual DNA repair capacity. With increasing doses of UV in keratinocytes, a plateau was rapidly reached after irradiation, whereas in fibroblasts a linear dose-effect relationship was observed. These interindividual variations associated with cellular specificity in DNA response may be of significance in skin cell and individual susceptibility toward UV-induced carcinogenesis.
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Affiliation(s)
- Marjorie Chazal
- 1INSERM U532, Institut de Recherche sur la Peau, Paris, France
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Reddy GB, Narayanan S, Reddy PY, Surolia I. Suppression of DTT-induced aggregation of abrin by alphaA- and alphaB-crystallins: a model aggregation assay for alpha-crystallin chaperone activity in vitro. FEBS Lett 2002; 522:59-64. [PMID: 12095619 DOI: 10.1016/s0014-5793(02)02884-3] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
The eye lens small heat shock proteins (sHSP), alphaA- and alphaB-crystallins, have been shown to function like molecular chaperones, both in vitro and in vivo. It is essential to assess the protective effect of alphaA- and alphaB-crystallins under native conditions to extrapolate the results to in vivo conditions. Insulin and alpha-lactalbumin have widely been used to investigate the chaperone mechanism of alpha-crystallin under native conditions. Due to its smaller size, insulin B-chain may not represent the binding of putative physiological substrate proteins. As it stands, the aggregation of alpha-lactalbumin and binding of alpha-crystallin to it varies under different experimental conditions. Abrin, a ribosome inactivating protein isolated from the seeds of Abrus precatorius, consists of a 30 kDa A-chain and a lectin-like B-chain of 33 kDa joined by a single disulfide bond. Reduction of the disulfide link between the two chains of abrin leads to the aggregation of the B-chain. In this study, we demonstrate that dithiothreitol (DTT)-induced aggregation of abrin B-chain could be monitored by light scattering similar to that of insulin. Moreso, this process could be suppressed by recombinant human alphaA- and alphaB-crystallins in a concentration dependent manner, notably by binding to aggregation prone abrin B-chain. SDS-PAGE and HPLC gel filtration analysis indicate that there is a soluble complex formation between alpha-crystallin and abrin B-chain. Interestingly, in contrast to insulin, there is no significant difference between alphaA- and alphaB-crystallin in suppressing the aggregation of abrin B-chain at two different temperatures (25 and 37 degrees C). HSP26, an another small heat shock/alpha-crystallin family protein, was also able to prevent the DTT-induced aggregation of abrin. These results suggest that due to relatively larger size of its B-chain (33 kDa), compared to insulin B-chain (about 3 kDa), abrin may serve as a better model substrate for in vitro chaperone studies of alpha-crystallin and as well as other sHSP.
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Affiliation(s)
- G Bhanuprakash Reddy
- Biochemistry Division, National Institute of Nutrition, Hyderabad 500 007, India.
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Weinreb O, Dovrat A, Dunia I, Benedetti EL, Bloemendal H. UV-A-related alterations of young and adult lens water-insoluble alpha-crystallin, plasma membranous and cytoskeletal proteins. EUROPEAN JOURNAL OF BIOCHEMISTRY 2001; 268:536-43. [PMID: 11168392 DOI: 10.1046/j.1432-1327.2001.01885.x] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
The damaging effects of UV-A irradiation on lens water-insoluble alpha-crystallin, plasma membranous and cytoskeletal proteins derived from bovine lenses were studied. Young and adult bovine lenses were kept viable for 2 months in organ culture. After 24 h of incubation they were irradiated, and analyses of the proteins by one-dimensional and two-dimensional gel electrophoresis followed by Western blotting were carried out at several time intervals. RNA isolation, PCR and Northern blotting were also performed. We identified age-related changes in water-insoluble alpha-crystallin, the major membrane protein MP26 and the cytoskeletal proteins vimentin, phakinin and actin between control and UV-irradiated lenses. It appeared that adult lenses are more susceptible to UV light than young lenses, and protein modification occurred more frequently in adult lenses. UV-A irradiation affects not only the cytoskeletal structure, as deduced by the abnormal arrangement of actin in the fiber cells, but also leads to degradation of actin mRNA. Furthermore, analysis of the expression of hsp25 and hsp70 revealed some alteration in the protein pattern of adult lenses. We suggest that degradation of the cytoskeletal proteins following irradiation is due to, at least in part, the decreased protective ability of heat shock proteins upon aging.
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Affiliation(s)
- O Weinreb
- Department of Biochemistry, University of Nijmegen, the Netherlands
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Greinert R, Boguhn O, Harder D, Breitbart EW, Mitchell DL, Volkmer B. The dose dependence of cyclobutane dimer induction and repair in UVB-irradiated human keratinocytes. Photochem Photobiol 2000; 72:701-8. [PMID: 11107858 DOI: 10.1562/0031-8655(2000)072<0701:tddocd>2.0.co;2] [Citation(s) in RCA: 39] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
UVB and UVA components of the solar spectrum or from artificial UV-sources might be important etiological factors for the induction and development of skin cancer. In particular, deficiencies in the capacity to repair UV-induced DNA-lesions have been linked to this phenomenon. However, until now only limited data are available on the biological and physical parameters governing repair capacity. We have, therefore, developed a flowcytometric assay using fluorescence-labeled monoclonal antibodies to study the dose-dependence of induction and repair of UVB-induced cyclobutane pyrimidine dimers in a spontaneously immortalized keratinocytic cell line (HaCaT). Our results show that the kinetics of recognition and incision of UVB-induced DNA lesions slows down by a factor of about 3 in a dose range of 100-800 J m-2. Furthermore, a thorough analysis of repair kinetics indicates that this reduction in repair capacity might not be dependent on saturation of enzymatic repair capacity (Michaelis-Menten) but may be caused by a UV-induced impairment of enzymes involved in DNA repair. Because this effect is evident in vitro at doses comparable to the minimal erythemal dose in vivo, our results might have significant impact on risk assessment for UV-induced carcinogenesis.
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Affiliation(s)
- R Greinert
- Dermatologisches Zentrum Buxtehude, Krankenhaus Buxtehude, Germany.
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Gerhardt KE, Wilson MI, Greenberg BM. Tryptophan Photolysis Leads to a UVB-lnduced 66 kDa Photoproduct of Ribulose-1,5 Bisphosphate Carboxylase/Oxygenase (Rubisco) In Vitro and In Vivo. Photochem Photobiol 1999. [DOI: 10.1111/j.1751-1097.1999.tb01948.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Raman B, Ramakrishna T, Rao CM. Effect of the chaperone-like alpha-crystallin on the refolding of lysozyme and ribonuclease A. FEBS Lett 1997; 416:369-72. [PMID: 9373187 DOI: 10.1016/s0014-5793(97)01240-4] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Alpha-crystallin exhibits chaperone-like properties in preventing aggregation of proteins. We have studied the effect of alpha-crystallin on the refolding of denatured-disulfide intact and denatured-reduced lysozyme and RNase A. Alpha-crystallin does not have any effect on the refolding of both the denatured-disulfide intact enzymes. However, it inhibits the aggregation and oxidative renaturation of denatured-reduced lysozyme. Interestingly, it has no effect on the refolding of denatured-reduced RNase A. In order to probe the molecular basis of this differential behavior of alpha-crystallin towards lysozyme and RNase A, we have carried out circular dichroism and fluorescence studies on the refolding of denatured-reduced RNase A. It exhibits an extended conformation with little difference in the exposed hydrophobicity during the refolding process. We have earlier shown the presence of an aggregation-prone, refolding-competent, molten-globule-like intermediate on the refolding pathway of lysozyme. Alpha-crystallin binds to this intermediate, prevents its aggregation and inhibits its oxidative refolding. It was earlier believed that alpha-crystallin, unlike other chaperones, does not recognize intermediates on the refolding pathway but only recognizes intermediates on the unfolding pathway of proteins. Our present study clearly shows that it recognizes the refolding intermediates as well.
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Affiliation(s)
- B Raman
- Centre for Cellular and Molecular Biology, Hyderabad, India
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