Bright Singh, I S; Rosamma, Philip; Swapna, Antony P(Elsevier, June 23, 2011)
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Abstract:
Antimicrobial peptides (AMPs) play a major role in innate immunity. Penaeidins are a family of AMPs that
appear to be expressed in all penaeid shrimps. Penaeidins are composed of an N-terminal proline-rich
domain, followed by a C-terminal domain containing six cysteine residues organized in two doublets. This
study reports the first penaeidin AMP sequence, Fi-penaeidin (GenBank accession number HM243617) from
the Indian white shrimp, Fenneropenaeus indicus. The full length cDNA consists of 186 base pairs encoding 61
amino acidswith an ORF of 42 amino acids and contains a putative signal peptide of 19 amino acids. Comparison
of F. indicus penaeidin (Fi-penaeidin) with other known penaeidins showed that it shared maximum similarity
with penaeidins of Farfantepenaeus paulensis and Farfantepenaeus subtilis (96% each). Fi-penaeidin has a predicted
molecular weight (MW) of 4.478 kDa and theoretical isoelectric point (pI) of 5.3
Bright Singh, I S; Preetha, R; Jayaprakash, N S(Inter-Research, March , 2007)
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Abstract:
Synechocystis MCCB 114 and 115 were segregated as putative probionts for shrimp
larvae from a collection of 54 cyanobacterial cultures enriched from seawater. On feeding Penaeus
monodon post-larvae with the cyanobacteria, the generic diversity of the intestinal bacterial flora
could be enhanced with substantial reduction or total absence of Vibrio spp. A significant difference
(p < 0.001) in the percent survival of batches of post-larvae fed on the cyanobacterial cultures was
observed and, on repeated challenge with V. harveyi, the relative percent survival of those batches
of larvae fed on Synechocystis MCCB 114 and 115 was significantly higher. The Synechocystis
MCCB 114 and 115 cultures were found to contain high levels of protein (34 to 43%), in addition to
carotenoids