Ontology highlight
ABSTRACT:
SUBMITTER: Saen-Oon S
PROVIDER: S-EPMC2575456 | biostudies-literature | 2008 Oct
REPOSITORIES: biostudies-literature
Proceedings of the National Academy of Sciences of the United States of America 20081022 43
Transition path sampling (TPS) has been applied to the chemical step of human purine nucleoside phosphorylase (PNP). The transition path ensemble provides insight into the detailed mechanistic dynamics and atomic motion involved in transition state passage. The reaction mechanism involves early loss of the ribosidic bond to form a transition state with substantial ribooxacarbenium ion character, followed by dynamic motion from the enzyme and a conformational change in the ribosyl group leading t ...[more]