[Proteopedia] New kind of inter-chain bond involved in redox allostery
Eric Martz
emartz at microbio.umass.edu
Tue May 25 20:03:20 EDT 2021
Earlier this month, a new kind of covalent linkage between the
sidechains of Lys and Cys was reported in Nature, a
Nitrogen-Oxygen-Sulfur (NOS) bond. In the initial case of the
transaldolases studied, it serves as an allosteric redox switch for
enzymatic activity. NOS appears likely to occur in proteins in all
domains of life including /Homo sapiens/, apparently overlooked in
earlier interpretations of electron density maps.
Have a look at this new page:
https://proteopedia.org/w/Lysine-cysteine_NOS_bonds
-Eric
P.S. Thanks to crystallographer Fadel Samatey for pointing out the
original report to me.
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