Domain

MATH/TRAF domain (IPR002083)

Short name: MATH/TRAF_dom

Domain relationships

None.

Description

Although apparently functionally unrelated, intracellular TRAFs and extracellular meprins share a conserved region of about 180 residues, the meprin and TRAF homology (MATH) domain [PMID: 12387856]. Meprins are mammalian tissue-specific metalloendopeptidases of the astacin family implicated in developmental, normal and pathological processes by hydrolysing a variety of proteins. Various growth factors, cytokines, and extracellular matrix proteins are substrates for meprins. They are composed of five structural domains: an N-terminal endopeptidase domain, a MAM domain (see PDOC00604), a MATH domain, an EGF-like domain (see PDOC00021) and a C-terminal transmembrane region. Meprin A and B form membrane bound homotetramer whereas homooligomers of meprin A are secreted. A proteolitic site adjacent to the MATH domain, only present in meprin A, allows the release of the protein from the membrane [PMID: 7890660].

TRAF proteins were first isolated by their ability to interact with TNF receptors [PMID: 8069916]. They promote cell survival by the activation of downstream protein kinases and, finally, transcription factors of the NF-kB and AP-1 family. The TRAF proteins are composed of 3 structural domains: a RING finger (see PDOC00449) in the N-terminal part of the protein, one to seven TRAF zinc fingers (see PDOC50145) in the middle and the MATH domain in the C-terminal part [PMID: 12387856]. The MATH domain is necessary and sufficient for self-association and receptor interaction. From the structural analysis two consensus sequence recognised by the TRAF domain have been defined: a major one, [PSAT]x[QE]E and a minor one, PxQxxD [PMID: 10518213].

The structure of the TRAF2 protein reveals a trimeric self-association of the MATH domain [PMID: 10206649]. The domain forms a new, light-stranded antiparallel beta sandwich structure. A coiled-coil region adjacent to the MATH domain is also important for the trimerisation. The oligomerisation is essential for establishing appropriate connections to form signalling complexes with TNF receptor-1. The ligand binding surface of TRAF proteins is located in beta-strands 6 and 7 [PMID: 10518213].

GO terms

Biological Process

No terms assigned in this category.

Molecular Function

GO:0005515 protein binding

Cellular Component

No terms assigned in this category.

Contributing signatures

Signatures from InterPro member databases are used to construct an entry.
CDD
Pfam
PROSITE profiles
SMART