Disulfide Bonds


Also found in: Medical.

Disulfide Bonds

 

(—S—S— bonds), bonds that are formed by the union of sulfur atoms of two mercapto groups. Crosslinking of polypeptide chains containing residues of the amino acid cysteine takes place with the formation of disulfide bonds.

References in periodicals archive ?
GranRepair PowerBond protects existing disulfide bonds and as well as reconnects broken ones caused from excessive bleaching, over-treatment, and extreme flat iron use.
Selenocysteine has a structure and chemical properties very similar to cysteine, however diselenide bonds are stable under the same conditions where disulfide bonds are not, leading to a much longer half-life of the therapeutic protein.
A variety of bonding interactions including hydrogen bonding, salt bridges, and disulfide bonds hold the various chains into a particular geometry.
After reducing the disulfide bonds holding the heavy and light chains together, they were able to identify unique light chains derived from monoclonal immunoglobulins by using liquid chromatography coupled with electrospray ionization (ESI) and time of flight (TOF).
Thiols engage in oxidation reactions with oxidant molecules, forming disulfide bonds.
Thrombolysis is the first choice of therapy for Acute Myocardial Infarction (AMI) (1) Tissue Plasminogen Activator (tPA) which derives from fibrinolytic system of blood vessel endothelial cells is a thrombolytic agent that activates plasminogen to form plasmin (2,3) Native tPA is a 70 kDa serine protease composed of 527 amino acid residues with five structural domains and 17 disulfide bonds (2,4).
Hogg, "Control of mature protein function by allosteric disulfide bonds," Antioxidants and Redox Signaling, vol.
Another approach for intrinsic self-healing is by means of the formation of covalent bonds that allow chain exchange reactions such as the dynamic reversible formation of acylhydrazones [11], trithiocarbonates reshuffling [12], the reaction exchange of siloxane segments [13, 14], and the metathesis reaction of disulfide bonds [15-17].
These reactions are expected to be increased in OxS, since the reduction of disulfide bonds has been shown to promote platelet aggregation and isomerization is an essential step towards [[alpha].
We aim to detect motion within the receptor on the angstrom scale by trapping conformational states during activation with artificial metal ion binding sites and disulfide bonds.
2]S reduces cysteine disulfide bonds at the ligand-binding domain of NMDA receptors to enhance the activity of the receptors, but this reaction does not fully explain the mechanism for its facilitation of LTP induction.
The tertiary structure of a protein is the three-dimensional structure and is stabilized by the series of hydrophobic amino acid residues and by disulfide bonds formed among two cysteine amino acid.