Methionine synthase: Difference between revisions

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== Cobalamin binding ==
== Cobalamin binding ==


[[Image:cob_1_alamin.jpeg|250px]]
[[Image:cob_1_alamin.jpeg|300px]]


The Cobalamin binding domain has a special characteristic in that, it is most naturally found in a protective conformation to prevent unwanted chemistry from occurring (PDB: 1BMT). This is referred to as a 'capping' mechanism.  
The Cobalamin binding domain has a special characteristic in that, it is most naturally found in a protective conformation to prevent unwanted chemistry from occurring (PDB: 1BMT). This is referred to as a 'capping' mechanism.  


The lower ligand of the <scene name='90/907471/Bindingdomain2/1'>B12 binding domain</scene> is where DMB is displaced from the Cobalt by a Histidine residue to form Me-Cob(III)alamin.
DMB, in the lower ligand of the <scene name='90/907471/Bindingdomain2/1'>B12 binding domain</scene> is displaced from the Cobalt by a Histidine residue to be 'uncapped' to form Me-Cob(III)alamin.