Inner membrane-spanning protein YciB (also known as intracellular septation protein A) is a family of proteins which are essential for both normal cell division and bacterial virulence and are believed to play a role in the septation process [1,2,3]. These proteins play a role in cell envelope biogenesis, maintenance of cell envelope integrity and membrane homeostasis [3,4,5,6].

1: Identification and characterization of ispA, a Shigella flexneri chromosomal gene essential for normal in vivo cell division and intracellular spreading. Mac Siomoin RA, Nakata N, Murai T, Yoshikawa M, Tsuji H, Sasakawa C.; Mol Microbiol 1996;19:599-609. PMID:8830250

2: Identification of two Shigella flexneri chromosomal loci involved in intercellular spreading. Hong M, Gleason Y, Wyckoff EE, Payne SM; Infect Immun. 1998;66:4700-4710. PMID:9746567

3: Escherichia coli inner membrane protein YciB interacts with ZipA that is important for cell division. Badaluddin NA, Kitakawa M; Genes Cells. 2015;20:956-965. PMID:26391555

4: Characterization of inner membrane protein YciB in Escherichia coli: YciB interacts with cell elongation and division proteins. Li G, Badaluddin NA, Kitakawa M; Microbiol Immunol. 2015;59:700-704. PMID:26454142

5: A synergistic role for two predicted inner membrane proteins of Escherichia coli in cell envelope integrity. Mychack A, Amrutha RN, Chung C, Cardenas Arevalo K, Reddy M, Janakiraman A; Mol Microbiol. 2019;111:317-337. PMID:30368949

6: Defects in The First Step of Lipoprotein Maturation Underlie The Synthetic Lethality of Escherichia coli Lacking The Inner Membrane Proteins YciB And DcrB. Mychack A, Janakiraman A; J Bacteriol. 2021; [Epub ahead of print] PMID:33431434