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J Bacteriol

Title:		Identification and characterization of a determinant (eep) on the Enterococcus faecalis chromosome that is involved in production of the peptide sex pheromone cAD1
Author(s):		An FY; Sulavik MC; Clewell DB;
Address:		"Department of Biologic and Materials Sciences, School of Dentistry, The University of Michigan, Ann Arbor, Michigan 48109, USA"
Journal Title:		J Bacteriol
Year:		1999
Volume:		181
Issue:		19
Page Number:		5915 - 5921
DOI:		10.1128/JB.181.19.5915-5921.1999
ISSN/ISBN:		0021-9193 (Print) 1098-5530 (Electronic) 0021-9193 (Linking)
Abstract:		"Plasmid-free strains of Enterococcus faecalis secrete a peptide sex pheromone, cAD1, which specifically induces a mating response by donors carrying the hemolysin plasmid pAD1 or related elements. A determinant on the E. faecalis OG1X chromosome has been found to encode a 46.5-kDa protein that plays an important role in the production of the extracellular cAD1. Wild-type E. faecalis OG1X cells harboring a plasmid chimera carrying the determinant exhibited an eightfold enhanced production of cAD1, and plasmid-free cells carrying a mutated chromosomal determinant secreted undetectable or very low amounts of the pheromone. The production of other pheromones such as cPD1, cOB1, and cCF10 was also influenced, although there was no effect on the pheromone cAM373. The determinant, designated eep (for enhanced expression of pheromone), did not include the sequence of the pheromone. Its deduced product (Eep) contains apparent membrane-spanning sequences; conceivably it is involved in processing a pheromone precursor structure or in some way regulates expression or secretion"
Keywords:		"Amino Acid Sequence *Bacterial Proteins Base Sequence Chromosomes, Bacterial Cloning, Molecular Enterococcus faecalis/*genetics Genes, Bacterial Membrane Proteins/biosynthesis/*genetics Molecular Sequence Data Mutation Oligopeptides/*biosynthesis Open Rea;"
Notes:		"MedlineAn, F Y Sulavik, M C Clewell, D B eng GM33956/GM/NIGMS NIH HHS/ Research Support, U.S. Gov't, P.H.S. 1999/09/28 J Bacteriol. 1999 Oct; 181(19):5915-21. doi: 10.1128/JB.181.19.5915-5921.1999"