Salt_bridge_(protein)

Salt bridge (protein)

In protein chemistry, the term salt bridge or salt bond denotes a relatively weak ionic bond between positively and negatively charged side-chains of proteins. Salt bridges contribute to the stability of protein structure.

External links

Examples of salt bridges

Sources

Oxford dictionary of biochemistry and molecular biology, 2000, ISBN 0-19-850673-2

v • d • e

Chemical bonds

"Strong"

Covalent bonds & Antibonding	Sigma bonds: 3c-2e (bent bond) · 3c-4e (Hydrogen bond, Dihydrogen bond, Agostic interaction) · 4c-2e Pi bonds: π backbonding · Conjugation · Hyperconjugation · Aromaticity · Metal aromaticity Delta bond: Quadruple bond · Quintuple bond · Sextuple bond Coordinate covalent bond · Hapticity

Ionic bonds	Cation-pi interaction · Salt bridge

Metallic bonds	Metal aromaticity

"Weak"

Hydrogen bond	Dihydrogen bond · Dihydrogen complex · Low-barrier hydrogen bond · Symmetric hydrogen bond · Hydrophile

Other noncovalent	van der Waals force · Mechanical bond · Halogen bond · Aurophilicity · Intercalation · Stacking · Entropic force · Chemical polarity

other

Disulfide bond · Peptide bond · Phosphodiester bond

Note: the weakest strong bonds are not necessarily stronger than the strongest weak bonds

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