Journal
MOLECULAR MICROBIOLOGY
Volume 89, Issue 1, Pages 113-122Publisher
WILEY-BLACKWELL
DOI: 10.1111/mmi.12262
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Funding
- Netherlands Organization for Scientific Research (NWO)
- National Science Foundation
- National Institutes of Health [GM18568]
- Department of Defense Multi-disciplinary University Research Initiative through the US Army Research Laboratory
- US Army Research Office [W911NF-09-1-0286]
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A growing class of proteins regulates transcription through interaction with DNA-dependent RNA polymerase. Here we report that a recently identified, highly conserved sporulation gene ylyA encodes a novel RNA polymerase-binding protein that influences the expression of genes under the control of the late-acting, sporulation sigma factor sigma G in Bacillus subtilis. Spores from a ylyA mutant exhibited defects in germination corresponding to changes in the levels of membrane receptors for spore germinants and a protein channel governing the release of dipicolinic acid and hydration of the spore core during germination. Purified YlyA interacted with RNA polymerase and stimulated transcription from promoters dependent on sigma G but not promoters dependent on the housekeeping sigma factor sigma A. YlyA is a previously unrecognized RNA polymerase-binding protein that is dedicated to modulating the expression of genes involved in spore germination.
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