2axv
From Proteopedia
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Structure of PrgX Y153C mutant
Overview
Many bacterial activities, including expression of virulence factors, horizontal genetic transfer, and production of antibiotics, are controlled by intercellular signaling using small molecules. To date, understanding of the molecular mechanisms of peptide-mediated cell-cell signaling has been limited by a dearth of published information about the molecular structures of the signaling components. Here, we present the molecular structure of PrgX, a DNA- and peptide-binding protein that regulates expression of the conjugative transfer genes of the Enterococcus faecalis plasmid pCF10 in response to an intercellular peptide pheromone signal. Comparison of the structures of PrgX and the PrgX/pheromone complex suggests that pheromone binding destabilizes PrgX tetramers, opening a 70-bp pCF10 DNA loop required for conjugation repression.
About this Structure
2AXV is a Single protein structure of sequence from Enterococcus faecalis. Full crystallographic information is available from OCA.
Reference
Structure of peptide sex pheromone receptor PrgX and PrgX/pheromone complexes and regulation of conjugation in Enterococcus faecalis., Shi K, Brown CK, Gu ZY, Kozlowicz BK, Dunny GM, Ohlendorf DH, Earhart CA, Proc Natl Acad Sci U S A. 2005 Dec 20;102(51):18596-601. Epub 2005 Dec 8. PMID:16339309
Page seeded by OCA on Thu Mar 20 15:55:13 2008
