University:
Boston University
Course:
CAS BI 108 | Biology 2
Academic year:

2024
Views:

457

Pages:

1
Author:

ke1ra3p2uaper

Photosynthesis Transketolase: exchange of 2C from ketose to an aldose acceptor Uses Thiamine Pyrophosphate (TPP) as the Cofactor OVERALL Reaction: Photosynthesis Transketolase: exchange of 2C from ketose to an aldose acceptor Uses Thiamine Pyrophosphate (TPP) as the Cofactor • Contains thiazolium anion for nucleophilic attack on carbonyls of ketose e.g., fructose 6-phosphate • Also used by: – pyruvate dehydrogenase in acetyl CoA formation – pyruvate decarboxylase in ethanol metabolism – a-ketoglutarate dehydrogenase in CAC – transketolase in pentose phosphate pathway Aldose product e.g., erythrose 4-phosphate e.g., glyceraldehyde 3-phosphate e.g., xyulose 5-phosphate