5lam

Publication Abstract from PubMed

S-Nitrosylation is well established as an important post-translational regulator in protein function and signaling. However, relatively little is known about its structural and dynamical consequences. We have investigated the effects of S-nitrosylation on the rhodanese domain of the Escherichia coli integral membrane protein YgaP by NMR, X-ray crystallography, and mass spectrometry. The results show that the active cysteine in the rhodanese domain of YgaP is subjected to two competing modifications: S-nitrosylation and S-sulfhydration, which are naturally occurring in vivo. It has been observed that in addition to inhibition of the sulfur transfer activity, S-nitrosylation of the active site residue Cys63 causes an increase in slow motion and a displacement of helix 5 due to a weakening of the interaction between the active site and the helix dipole. These findings provide an example of how nitrosative stress can exert action at the atomic level.

S-Nitrosylation Induces Structural and Dynamical Changes in a Rhodanese Family Protein.,Eichmann C, Tzitzilonis C, Nakamura T, Kwiatkowski W, Maslennikov I, Choe S, Lipton SA, Riek R J Mol Biol. 2016 Jul 27. pii: S0022-2836(16)30255-8. doi:, 10.1016/j.jmb.2016.07.010. PMID:27473602^[1]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.