A novel RNA polymerase-binding protein controlling genes involved in spore germination in Bacillus subtilis

作者：Traag Bjorn A; Ramirez Peralta Arturo; Erickson Anna F Wang; Setlow Peter; Losick Richard^*

来源：Molecular Microbiology, 2013, 89(1): 113-122.

DOI：10.1111/mmi.12262

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.

• 出版日期2013-7