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Articles by Sunil Kumar Sahu
Total Records ( 2 ) for Sunil Kumar Sahu
  P. Gnanamoorthy , Sunil Kumar Sahu and V. Ashok Prabu
  Phytoplankton are the major source of primary production in water bodies. But, due to increased anthropogenic pressures in the coastal waters, there is a gradual decrease in the population of this biological resource. In the present study, multivariate statistical methods including principal component and cluster analysis were applied to surface water quality data sets obtained from Vellar Estuary, Parangipettai, Southeast coast of India. Studies on physicochemical and biological parameters were made during August 2008 to July 2009. Totally 45 species representing different classes namely Bacillariophyceae (36); Dinophyceae (6); Chlorophyceae (1) and Cyanophyceae (2) were recorded. Among the four classes, Bacillariophyceae appeared as the dominant group in terms of total species and cell numbers. The multivariate statistical analysis revealed that the surface water quality and phytoplankton density of the Parangipettai waters and its tributaries is being affected by increased aquaculture practices, agriculture discharges and high level of organic load. These data on the phytoplankton distribution and abundance with reference to hydrography will be of immense help for further ecological assessment in Parangipettai waters.
  P. Senthilraja , Sunil Kumar Sahu and K. Kathiresan
  Antimicrobial peptides (AMPs) are an important component of the natural defences of most living organisms against invading pathogens. In the present study marine yeast (Saccharomyces cerevisiae) was cultured in Yeast Malt Agar medium followed by protein extraction and quantification by using sonication method and Bradford assay, respectively. The isolated protein was then subjected for native PAGE and the four distinct bands were excised and tested for antibacterial activity against five bacterial human pathogens viz. Escherichia coli, Staphylococcus aureus, Vibrio cholera, Salmonella typhi and Shigella flexneri. Of the four protein bands, only one band exhibited antibacterial activity which was identified to have a molecular weight of 60 KDa. The peptides analysis was made through using the MASCOT search engine, using MALDI-TOF/MS result revealed that the peptides machinhg 51%, 10 peptides sequence was mached 60 KDa heat shock protein. the protein retrieve uniprot database total primary sequence 341 amino acids. The secondary structure of the identified protein indicated that the amino acids was mainly composed of helical form (49.85%) followed by the Coil structure (24.63%) and strand (14.08%). The identification of HPS60 heat shock proteins from marine yeast provides further evidence that this protein may play a pivotal role against a wide range of human pathogens.
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