This family consists of several bacterial MltA-interacting protein (MipA) like sequences. As well as interacting with the membrane-bound lytic transglycosylase MltA, MipA is known to bind to PBP1B, a bifunctional murein transglycosylase/transpeptidase. MipA is considered to be a structural protein mediating the assembly of MltA to PBP1B into a complex [1].

1: Demonstration of molecular interactions between the murein polymerase PBP1B, the lytic transglycosylase MltA, and the scaffolding protein MipA of Escherichia coli. Vollmer W, von Rechenberg M, Holtje JV; J Biol Chem 1999;274:6726-6734. PMID:10037771