Dictionary > Disulfide bond

Disulfide bond

Definition
noun
(chemistry)
(1) The single covalent bond formed from the coupling of thiol groups, especially of cysteine residues.
(2) The linkage formed by the oxidation of two SH groups, each attached to a cysteine, stabilizing the structure of many protein molecules (during protein synthesis).
Supplement
Disulfide bonds play an important role in the folding and stability of some proteins, usually proteins secreted to the extracellular medium.
Below is an example of a disulfide bond:
Cysteine—SH + HS—Cysteine → Cysteine—S-S—Cysteine + 2H+ + 2e
Two cysteines linked by a disulfide bond forms a cystine.
Variant: disulphide bond


You will also like...

dinosaurs
The Dinosaurs

Dinosaurs represented a major turn in the evolutionary development of organisms on Earth. The first dinosaurs were presu..

Human Nervous System
The Human Nervous System

The nervous system is essentially a biological information highway. This tutorial gives an overview of the nervous syste..

Kidneys
Kidneys and Regulation of Water and Inorganic Ions

The kidneys are responsible for the regulation of water and inorganic ions. Read this tutorial to learn about the differ..

Chromosomes X and Y and Sex Determination
Chromosomes X and Y and Sex Determination

This tutorial looks at sex determination via the sex chromosomes, X and Y. Read it to get more info on X and Y chromosom..

Water Cycle
The Water Cycle

The water cycle (also referred to as the hydrological cycle) is a system of continuous transfer of water from the air, s..

Salmon jumping upstream in the river
Lotic Communities & Animals

A running water environment offers numerous microhabitats for many types of animals. Similar to plants, animals in lotic..

Related Articles...

No related articles found

See all Related Topics