« Previous AbstractSensitive detection of bacterial transcription initiation sites and differentiation from RNA processing sites in the pheromone-induced plasmid transfer system of Enterococcus faecalis    Next AbstractPheromone-inducible expression of an aggregation protein in Enterococcus faecalis requires interaction of a plasmid-encoded RNA with components of the ribosome »

Mol Microbiol

Title:		Pheromone cCF10 and plasmid pCF10-encoded regulatory molecules act post-transcriptionally to activate expression of downstream conjugation functions
Author(s):		Bensing BA; Manias DA; Dunny GM;
Address:		"Department of Microbiology and Institute for Advanced Studies in Biological Process Technology, University of Minnesota, Minneapolis 55455, USA"
Journal Title:		Mol Microbiol
Year:		1997
Volume:		24
Issue:		2
Page Number:		285 - 294
DOI:		10.1046/j.1365-2958.1997.3301710.x
ISSN/ISBN:		0950-382X (Print) 0950-382X (Linking)
Abstract:		"Expression of aggregation protein Asc10 from the prgB gene of conjugative plasmid pCF10 in Enterococcus faecalis is induced by the peptide pheromone cCF10. Genes required for Asc10 production, prgQ and prgS, lie 3-5 kb upstream, but can function at much greater distances. The prgQ transcripts encode a pheromone inhibitor peptide (iCF10) at the extreme 5' end. Neither production of this peptide nor translation of the 5' end of prgQ transcripts was found to be necessary for prgB expression. Pheromone cCF10 is required to activate prgB expression, even in the absence of iCF10 production, and does not affect initiation of transcription. The prgS gene encodes a 10.5 kDa protein that appears to be required for translation of prgB, and a non-coding RNA at the 3' end of prgS may be required for readthrough of transcription to prgB from the prgQ promoter. Although the entire positive control region is transcribed constitutively from the prgQ promoter, translation of PrgS and transcriptional readthrough to prgB occur only after induction with pheromone. The combined data are consistent with a model in which the positive regulatory molecules and pheromone cCF10 activate prgB expression post-transcriptionally"
Keywords:		"Bacterial Proteins/chemistry/*genetics/*metabolism Base Sequence Chromosome Mapping Enterococcus faecalis/*genetics/*metabolism *Gene Expression Regulation, Bacterial Membrane Proteins/chemistry/*genetics/*metabolism Models, Biological Molecular Sequence;"
Notes:		"MedlineBensing, B A Manias, D A Dunny, G M eng 1RO1GM49530/GM/NIGMS NIH HHS/ 1T32GM08347/GM/NIGMS NIH HHS/ Research Support, U.S. Gov't, P.H.S. England 1997/04/01 Mol Microbiol. 1997 Apr; 24(2):285-94. doi: 10.1046/j.1365-2958.1997.3301710.x"