The MsyB protein has been found to be able to restore protein export defects caused by a temperature-sensitive secY or secA mutation [1]. However, its exact molecular function is still unknown, but it may play a role in protein export. Proteins in this family are approximately 120 amino acids in length. This family of proteins is found in bacteria.

1: Multicopy suppression: an approach to understanding intracellular functioning of the protein export system. Ueguchi C, Ito K; J Bacteriol. 1992;174:1454-1461. PMID:1537791

2: The acidity of protein fusion partners predominantly determines the efficacy to improve the solubility of the target proteins expressed in Escherichia coli. Su Y, Zou Z, Feng S, Zhou P, Cao L; J Biotechnol. 2007;129:373-382. PMID:17374413