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A p53-like protein from a freshwater mollusc Lamellidens corrianus

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Title A p53-like protein from a freshwater mollusc Lamellidens corrianus
 
Creator Mohanty, B P
 
Subject p53
p53-Homologue
p53-like protein
Bivalve mollusc
Biomarker
Aquatic pollution
 
Description 247-250
p53 is the most frequently mutated protein in human cancers and the accumulation of its high levels is a potential novel marker for malignancy. Recently, its homologues such as p63 and p73 have been reported in human, mice and fish. Environmentally induced alterations in p53 protein have been reported to contribute to pathogenesis of leukemia in soft-shell clam Mya arenaria inhabiting polluted water, suggesting that p53 proteins can also be used as pollution markers. In the present study, the presence of p53 protein or its homologues was investigated in tissues of bivalve molluscs Lamellidens corrianus that are predominant in the freshwater riverine environment and are well suited to act as test organisms for evaluation of habitat degradation. The molluscs were collected live from the river Ganga at three sampling sites viz., Kanpur, Allahabad and Varanasi and different tissues (foot, gill and mantle) were collected. Proteins were analyzed by sodium dodecyl sulfate polyacrylamide gel electrophoresis (SDS-PAGE). On immunoblot analysis, a 45 kDa protein (p45) was recognized by the monoclonal anti-p53 antibody in the molluscan tissues. The p45 showed immunoreactivity in all the three tissues of molluscs collected at Kanpur, in foot and gill tissues in those collected at Allahabad, and in foot tissue only, in those collected at Varanasi. Since monoclonal anti-p53 recognizes a denaturation-resistant epitope on the p53 (53 kDa) nuclear protein and does not react with other cellular proteins, the molluscan p45 is a p53-homologue or p53-like protein. Further, the differential expression of p45 in the different organs might serve as a useful biomarker that would help in establishing pollution gradient for environmental monitoring in the large aquatic ecosystems.
 
Date 2009-02-27T05:43:23Z
2009-02-27T05:43:23Z
2006-08
 
Type Article
 
Identifier 0301-1208
http://hdl.handle.net/123456789/3284
 
Language en_US
 
Publisher CSIR
 
Source IJBB Vol.43(4) [August 2006]