2.1.1.326: N-acetyldemethylphosphinothricin P-methyltransferase
This is an abbreviated version!
For detailed information about N-acetyldemethylphosphinothricin P-methyltransferase, go to the full flat file.
Reaction
2 S-adenosyl-L-methionine + + = + + + +
Synonyms
BcpD, P-methylase, PhpK, SD_1168
ECTree
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Metals Ions
Metals Ions on EC 2.1.1.326 - N-acetyldemethylphosphinothricin P-methyltransferase
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[4Fe-4S] center
the enzyme is a radical S-adenosyl-L-methionine enzyme that contains a [4Fe-4S] center and a methylcob(III)alamin cofactor. According to the proposed mechanism, the reduced iron-sulfur center donates an electron to S-adenosyl-L-methionine, resulting in homolytic cleavage of the carbon-sulfur bond to form a 5'-deoxyadenosyl radical that abstracts the hydrogen atom from the P-H bond of the substrate, forming a phosphinate-centered radical. This radical reacts with methylcob(III)alamin to produce the methylated product and cob(II)alamin, which is reduced by an unknown donor to cob(I)alamin. A potential route for restoring the latter back to methylcob(III)alamin is a nucleophilic attack on a second S-adenosyl-L-methionine molecule
[4Fe-4S] cluster
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the enzyme binds 6.1 mol of iron per mol protein and 4.0 mol of sulfid