NMR structure of activated CheY.Cho, H.S., Lee, S.Y., Yan, D., Pan, X., Parkinson, J.S., Kustu, S., Wemmer, D.E., Pelton, J.G.
(2000) J.Mol.Biol. 297: 543-551
- PubMed: 10731410
- DOI: 10.1006/jmbi.2000.3595
- Also Cited By: 1ZDM
- PubMed Abstract:
- Beryllofluoride Mimics Phosphorylation of NtrC and Other Bacterial Response Regulators
Yan, D.,Cho, H.S.,Hastings, C.A.,Igo, M.M.,Lee, S.Y.,Pelton, J.G.,Stewart, V.,Wemmer, D.E.,Kustu, S.
(1999) Proc.Natl.Acad.Sci.USA 96: 14789
The CheY protein is the response regulator in bacterial chemotaxis. Phosphorylation of a conserved aspartyl residue induces structural changes that convert the protein from an inactive to an active state. The short half-life of the aspartyl-phosphate ...
The CheY protein is the response regulator in bacterial chemotaxis. Phosphorylation of a conserved aspartyl residue induces structural changes that convert the protein from an inactive to an active state. The short half-life of the aspartyl-phosphate has precluded detailed structural analysis of the active protein. Persistent activation of Escherichia coli CheY was achieved by complexation with beryllofluoride (BeF(3)(-)) and the structure determined by NMR spectroscopy to a backbone r.m.s.d. of 0.58(+/-0.08) A. Formation of a hydrogen bond between the Thr87 OH group and an active site acceptor, presumably Asp57.BeF(3)(-), stabilizes a coupled rearrangement of highly conserved residues, Thr87 and Tyr106, along with displacement of beta4 and H4, to yield the active state. The coupled rearrangement may be a more general mechanism for activation of receiver domains.
Physical Biosciences Division, Lawrence Berkeley National Laboratory, 1 Cyclotron Rd, Berkeley, CA, 94720, USA.