This entry corresponds to the TED domain of the complement components such as C3, C4 and C5. This domain contains a short highly conserved region of proteinase-binding alpha-macro-globulins contains the cysteine and a glutamine of a thiol-ester bond that is cleaved at the moment of proteinase binding, and mediates the covalent binding of the alpha-macro-globulin to the proteinase. The GCGEQ motif is highly conserved.

1: NMR solution structure of the receptor binding domain of human alpha(2)-macroglobulin. Huang W, Dolmer K, Liao X, Gettins PG; J Biol Chem 2000;275:1089-1094. PMID:10625650

2: Structure of a rat alpha 1-macroglobulin receptor-binding domain dimer. Xiao T, DeCamp DL, Spran SR; Protein Sci 2000;9:1889-1897. PMID:11106161

3: Structure of complement receptor 2 in complex with its C3d ligand. Szakonyi G, Guthridge JM, Li D, Young K, Holers VM, Chen XS; Science 2001;292:1725-1728. PMID:11387479

4: Structure at 1.44 A resolution of an N-terminally truncated form of the rat serum complement C3d fragment. Zanotti G, Bassetto A, Battistutta R, Folli C, Arcidiaco P, Stoppini M, Berni R; Biochim Biophys Acta 2000;1478:232-238. PMID:10825534