Was originally thought to be involved in heat shock response (PubMed:8400364, PubMed:8478327), however it was later shown not to be induced by sigma-32 (rpoH) (PubMed:16818608). This gene is encoded entirely within the yaaW gene on the opposite strand (PubMed:18226237). Disruptions of one gene are also usually disruptions in the other. Extended N-terminus. Truncated N-terminus.