An extracellular domain found in many receptors [1]. The MAM domain along with the associated Ig domain in type IIB receptor protein tyrosine phosphatases forms a structural unit (termed MIg) with a seamless interdomain interface. It plays a major role in homodimerisation of the phosphatase ectoprotein and in cell adhesion [2,3]. MAM is a beta-sandwich consisting of two five-stranded antiparallel beta-sheets rotated away from each other by approx 25 degrees, and plays a similar role in meprin metalloproteinases [4].

1: An adhesive domain detected in functionally diverse receptors. Beckmann G, Bork P; Trends Biochem Sci. 1993;18:40-41. PMID:8387703

2: Structure of a tyrosine phosphatase adhesive interaction reveals a spacer-clamp mechanism. Aricescu AR, Siebold C, Choudhuri K, Chang VT, Lu W, Davis SJ, van der Merwe PA, Jones EY; Science. 2007;317:1217-1220. PMID:17761881

3: Molecular analysis of receptor protein tyrosine phosphatase mu-mediated cell adhesion. Aricescu AR, Hon WC, Siebold C, Lu W, van der Merwe PA, Jones EY; EMBO J. 2006;25:701-712. PMID:16456543

4: Structural basis for the sheddase function of human meprin beta metalloproteinase at the plasma membrane. Arolas JL, Broder C, Jefferson T, Guevara T, Sterchi EE, Bode W, Stocker W, Becker-Pauly C, Gomis-Ruth FX; Proc Natl Acad Sci U S A. 2012;109:16131-16136. PMID:22988105