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Literature summary for 1.3.1.33 extracted from

  • Heyes, D.J.; Heathcote, P.; Rigby, S.E.; Palacios, M.A.; van Grondelle, R.; Hunter, C.N.
    The first catalytic step of the light-driven enzyme protochlorophyllide oxidoreductase proceeds via a charge transfer complex (2006), J. Biol. Chem., 281, 26847-26853.
    View publication on PubMed
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KM Value [mM]

KM Value [mM] KM Value Maximum [mM] Substrate Comment Organism Structure
additional information
-
 additional information EPR and Stark spectroscopies analysis of enzyme reaction Synechocystis sp.

Organism

Organism UniProt Comment Textmining
Synechocystis sp.
-
 strain PCC6803
-

Reaction

Reaction Comment Organism Reaction ID
chlorophyllide a + NADP+ = protochlorophyllide + NADPH + H+ catalytic mechanism suggested: protochlorophillide absorbs a photon, creating a transient charge separtaion across the C17-C18 double bond, which promotes ultrafast hydride transfer from the pro-S face of NADPH to the C17 of protochlorophillide. The resulting A696 charge transfer intermediate facilitates transfer of a proton to the C18 of protochlorophillide during the subsequent first dark reaction Synechocystis sp.
a