Cysteine regulation of protein function--as exemplified by NMDA-receptor modulation.

Article Details

Citation

Lipton SA, Choi YB, Takahashi H, Zhang D, Li W, Godzik A, Bankston LA

Cysteine regulation of protein function--as exemplified by NMDA-receptor modulation.

Trends Neurosci. 2002 Sep;25(9):474-80.

PubMed ID
12183209 [ View in PubMed
]
Abstract

Until recently cysteine residues, especially those located extracellularly, were thought to be important for metal coordination, catalysis and protein structure by forming disulfide bonds - but they were not thought to regulate protein function. However, this is not the case. Crucial cysteine residues can be involved in modulation of protein activity and signaling events via other reactions of their thiol (sulfhydryl; -SH) groups. These reactions can take several forms, such as redox events (chemical reduction or oxidation), chelation of transition metals (chiefly Zn(2+), Mn(2+) and Cu(2+)) or S-nitrosylation [the catalyzed transfer of a nitric oxide (NO) group to a thiol group]. In several cases, these disparate reactions can compete with one another for the same thiol group on a single cysteine residue, forming a molecular switch composed of a latticework of possible redox, NO or Zn(2+) modifications to control protein function. Thiol-mediated regulation of protein function can also involve reactions of cysteine residues that affect ligand binding allosterically. This article reviews the basis for these molecular cysteine switches, drawing on the NMDA receptor as an exemplary protein, and proposes a molecular model for the action of S-nitrosylation based on recently derived crystal structures.

DrugBank Data that Cites this Article

Drug Targets
DrugTargetKindOrganismPharmacological ActionActions
AcetylcysteineGlutamate receptor ionotropic, NMDA 1ProteinHumans
Unknown
Activator
Details
AcetylcysteineGlutamate receptor ionotropic, NMDA 2AProteinHumans
Unknown
Activator
Details
AcetylcysteineGlutamate receptor ionotropic, NMDA 2BProteinHumans
Unknown
Activator
Details
AcetylcysteineGlutamate receptor ionotropic, NMDA 2DProteinHumans
Unknown
Activator
Details
AcetylcysteineGlutamate receptor ionotropic, NMDA 3AProteinHumans
Unknown
Activator
Details