PubMed:25797797 JSONTXT

{"target":"https://pubannotation.org/docs/sourcedb/PubMed/sourceid/25797797","sourcedb":"PubMed","sourceid":"25797797","source_url":"http://www.ncbi.nlm.nih.gov/pubmed/25797797","text":"Peptidoglycan recognition protein S2 from silkworm integument: characterization, microbe-induced expression, and involvement in the immune-deficiency pathway.\nPeptidoglycan recognition protein (PGRP) binds specifically to peptidoglycan and plays an important role as a pattern recognition receptor in the innate immunity of insects. The cDNA of a short-type PGRP, an open reading frame of 588 bp encoding a polypeptide of 196 amino acids, was cloned from Bombyx mori. A phylogenetic tree was constructed, and the results showed that BmPGRP-S2 was most similar to Drosophila melanogaster PGRP (DmPGRP-SA). The induced expression profile of BmPGRP-S2 in healthy Escherichia coli- and Bacillus subtilis-challenged B. mori was measured using semiquantitative reverse transcriptase polymerase chain reaction analysis. The expression of BmPGRP-S2 was upregulated at 24 h by E. coli and Ba. subtilis challenge. In addition, in the integument of B. mori, RNAi knockdown of BmPGRP-S2 caused an obvious reduction in the transcription expression of the transcription factor Relish and in antibacterial effector genes Attacin, Gloverin, and Moricin. The results indicated that BmPGRP-S2 participates in the signal transduction pathway of B. 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