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. 2003 Jun;10(6):491-2.
doi: 10.1038/nsb929.

Ultrafast enzymatic reaction dynamics in protochlorophyllide oxidoreductase

Derren J Heyes  1 , C Neil Hunter, Ivo H M van Stokkum, Rienk van Grondelle, Marie Louise Groot
Affiliations

Ultrafast enzymatic reaction dynamics in protochlorophyllide oxidoreductase

Derren J Heyes et al. Nat Struct Biol. 2003 Jun.

Abstract

The reaction catalyzed by the light-driven enzyme protochlorophyllide oxidoreductase (POR) has been initiated with a 50-fs laser pulse. We show that the catalytic mechanism, involving proton and hydride transfers, proceeds with time constants of 3 ps and 400 ps. It is known that catalysis by POR involves thermally excited protein dynamics; our results show that these molecular motions occur on an ultrafast timescale.

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