In molecular biology, YecM refers to a protein domain found in Escherichia coli. It is a conserved, hypothetical protein with sequence homologues found exclusively in bacteria. Several bacterial YecM proteins in this particular family are of unknown function.
The precise function of the YecM domain remains to be elucidated. However, YecM structural homologues reveal that all the proteins bind a divalent metal cation. This comparison suggests that YecM may be a metal-binding protein and therefore may function as an enzyme.
The protein domain, YecM, is a monomer. The eight, mostly antiparallel beta-strands form around C-terminal alpha-helix. There are four alpha helices in total.