1BMT

HOW A PROTEIN BINDS B12: A 3.O ANGSTROM X-RAY STRUCTURE OF THE B12-BINDING DOMAINS OF METHIONINE SYNTHASE


ChainDomainClassArchitectureTopologyHomology
A, B
1.10.1240.10 Mainly Alpha Orthogonal Bundle Methyltransferase, Methionine Synthase (B12-binding Domains) Chain A, domain 1
A, B
3.40.50.280 Alpha Beta 3-Layer(aba) Sandwich Rossmann fold Cobalamin-binding domain
A, B
1.10.1240.10 Mainly Alpha Orthogonal Bundle Methyltransferase, Methionine Synthase (B12-binding Domains) Chain A, domain 1
A, B
3.40.50.280 Alpha Beta 3-Layer(aba) Sandwich Rossmann fold Cobalamin-binding domain

Protein Family Annotation Pfam Database Homepage

ChainsAccessionIdentifierDescriptionCommentsSource
A, B
PF02607B12 binding domain (B12-binding_2)B12 binding domainThis B12 binding domain is found in methionine synthase EC:2.1.1.13 Swiss:Q99707, and other shorter proteins that bind to B12. This domain is always found to the N-terminus of Pfam:PF02310. The structure of this domain is known [1], it is a 4 helix ...This B12 binding domain is found in methionine synthase EC:2.1.1.13 Swiss:Q99707, and other shorter proteins that bind to B12. This domain is always found to the N-terminus of Pfam:PF02310. The structure of this domain is known [1], it is a 4 helix bundle. Many of the conserved residues in this domain are involved in B12 binding, such as those in the MXXVG motif.
Domain
A, B
PF02310B12 binding domain (B12-binding)B12 binding domainThis domain binds to B12 (adenosylcobamide)[1-3], it is found in several enzymes, such as glutamate mutase Swiss:Q05488, methionine synthase Swiss:Q99707 and methylmalonyl-CoA mutase Swiss:P22033. It contains a conserved DxHxxGx(41)SxVx(26)GG motif, ...This domain binds to B12 (adenosylcobamide)[1-3], it is found in several enzymes, such as glutamate mutase Swiss:Q05488, methionine synthase Swiss:Q99707 and methylmalonyl-CoA mutase Swiss:P22033. It contains a conserved DxHxxGx(41)SxVx(26)GG motif, which is important for B12 binding [2].
Domain