Complete genome sequence of Priestia megaterium S188, a hydrogen sulfide-degrading bacterium

<italic>Priestia megaterium </italic>(formerly <italic>Bacillus megaterium)</italic> is a gram-positive, aerobic, spore-forming bacterium found in a wide range of environmental niches. Here, we report the complete genome sequence of <italic>P. megaterium </italic>S188 isolated from soil, which can decrease hydrogen sulfide (H₂S) levels and help reduce malodor generation in livestock farms. Putative genes related to sulfide assimilation and conversion were found in the genome of <italic>P. megaterium</italic> S188; among these, one O-acetylhomoserine<italic> (O-AH) </italic>desulfhydrase, two cysteine synthases<italic>—</italic>primarily related to the biosynthesis of sulfur-containing amino acids, five rhodanese or sulfurtransferases, and one nitrogen reductase were identified. The genomic information on <italic>P. megaterium</italic> S188 provides insights into the possible biodegradation or conversion mechanisms of sulfur-containing substances that cause malodors, which can help reduce odor generation. Furthermore, identification of the key genes or molecules responsible for H₂S reduction would facilitate the optimization of the H₂S-degrading ability of S188.