Members of this protein family are BshC, an enzyme required for bacillithiol biosynthesis and described as a cysteine-adding enzyme. Bacillithiol is a low-molecular-weight thiol, an analog of glutathione and mycothiol, and is found largely in the Firmicutes. [Biosynthesis of cofactors, prosthetic groups, and carriers, Glutathione and analogs]
Jiyao W et al.(2023). "The conserved domain database in 2023.",