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Results 1 - 2 of 2
EC Number Reaction Commentary Reference
Display the word mapDisplay the reaction diagram Show all sequences 1.3.7.3(3Z)-phycoerythrobilin + oxidized ferredoxin = 15,16-dihydrobiliverdin + reduced ferredoxin + 2 H+ - -
Display the word mapDisplay the reaction diagram Show all sequences 1.3.7.3(3Z)-phycoerythrobilin + oxidized ferredoxin = 15,16-dihydrobiliverdin + reduced ferredoxin + 2 H+ analysis of the reaction mechanism, after binding of 15,16-dihydrobiliverdin (DHBV) to the enzyme, Asp99 delivers a proton to the A-ring oxygen, forming a positively charged DHBVH+. After acceptance of an electron from ferredoxin, the A-ring pyrrole proton tautomerizes to the C2 position and is stabilized there. This is facilitated by the catalytic action of the axial water, which is activated/positioned by Asp219 and (indirectly) by Arg215. For the second protonation step, the reprotonation of the A-ring nitrogen, uptake of another electron, and a final tautomerization to yield the product PEB is assumed, flipped binding mode for PEB biosynthesis -, 763264
Results 1 - 2 of 2