The orientation and accessibility of substrates on the active site of triosephosphate isomerase.

Abstract:

:Tritiated sodium borohydride was used to reduce the substrates of triosephosphate isomerase in the presence of the enzyme, and the mixture of the four possible products (D-[1(R)-3H]; D-[1(S)-3H]-; D-[2-3H]-, and L-[2-3H]glycerol 3-phosphate) was analyzed. While enzyme-bound dihydroxyacetone phosphate is reduced completely stereoselectively and at a rate eight imes faster than in free solution, D-glyceraldehyde 3-phosphate is inaccessible to reduction by borohydride when bound to the active site of the enzyme.

journal_name

Biochemistry

journal_title

Biochemistry

authors

Webb MR,Knowles JR

doi

10.1021/bi00692a020

subject

Has Abstract

pub_date

1975-10-21 00:00:00

pages

4692-8

issue

21

eissn

0006-2960

issn

1520-4995

journal_volume

14

pub_type

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