Generating enzyme and radical-mediated bisubstrates as tools for investigating Gcn5-related N-acetyltransferases

© 2017 Federation of European Biochemical Societies..

Gcn5-related N-acetyltransferases (GNATs) are found in all kingdoms of life and catalyze important acyl transfer reactions in diverse cellular processes. While many 3D structures of GNATs have been determined, most do not contain acceptor substrates in their active sites. To expand upon existing crystallographic strategies for improving acceptor-bound GNAT structures, we synthesized peptide substrate analogs and reacted them with CoA in PA4794 protein crystals. We found two separate mechanisms for bisubstrate formation: (a) a novel X-ray induced radical-mediated alkylation of CoA with an alkene peptide and (b) direct alkylation of CoA with a halogenated peptide. Our approach is widely applicable across the GNAT superfamily and can be used to improve the success rate of obtaining liganded structures of other acyltransferases.

Medienart:

E-Artikel

Erscheinungsjahr:

2017

Erschienen:

2017

Enthalten in:

Zur Gesamtaufnahme - volume:591

Enthalten in:

FEBS letters - 591(2017), 15 vom: 19. Aug., Seite 2348-2361

Sprache:

Englisch

Beteiligte Personen:

Reidl, Cory [VerfasserIn]
Majorek, Karolina A [VerfasserIn]
Dang, Joseph [VerfasserIn]
Tran, David [VerfasserIn]
Jew, Kristen [VerfasserIn]
Law, Melissa [VerfasserIn]
Payne, Yasmine [VerfasserIn]
Minor, Wladek [VerfasserIn]
Becker, Daniel P [VerfasserIn]
Kuhn, Misty L [VerfasserIn]

Links:

Volltext

Themen:

Acetyltransferases
Coenzyme A
Dipeptides
EC 2.3.1.-
Gcn5-related N-acetyltransferase
Letter
Product-based transition-state modeling
Radical-mediated bisubstrate
Research Support, N.I.H., Extramural
Research Support, Non-U.S. Gov't
Research Support, U.S. Gov't, Non-P.H.S.
SAA04E81UX

Anmerkungen:

Date Completed 10.10.2017

Date Revised 06.01.2023

published: Print-Electronic

Citation Status MEDLINE

doi:

10.1002/1873-3468.12753

funding:

Förderinstitution / Projekttitel:

PPN (Katalog-ID):

NLM273794140