The plsX gene is part of the bacterial fab gene cluster which encodes several key fatty acid biosynthetic enzymes [1]. The exact function of the plsX protein in fatty acid synthesis is unknown.

1: Transcriptional analysis of essential genes of the Escherichia coli fatty acid biosynthesis gene cluster by functional replacement with the analogous Salmonella typhimurium gene cluster. Zhang Y, Cronan JE Jr; J Bacteriol 1998;180:3295-3303. PMID:9642179