TERMIUM Plus®

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PONTE DISSULFETO [1 record]

Record 1 2013-03-11

English

Subject field(s)
  • Biological Sciences
  • Biotechnology
DEF

The -S-S- link binding two peptide chains (or different parts of one peptide chain); it occurs as part of the molecule of the amino acid, cystine, and is important as a structural determinant in many protein molecules, notably keratin, insulin, and oxytocin.

French

Domaine(s)
  • Sciences biologiques
  • Biotechnologie
DEF

Dans une protéine, liaison covalente (pont) qui comporte deux atomes de soufre (S) provenant d'acides aminés soufrés de même nature (cystéine).

CONT

Pour certaines protéines, l'existence de ponts disulfures, liaisons covalentes, confère une stabilité supplémentaire en même temps qu'elle impose certaines restrictions à la conformation de la protéine.

Spanish

Campo(s) temático(s)
  • Ciencias biológicas
  • Biotecnología
DEF

Enlace químico entre pares de átomos de azufre que estabiliza la estructura tridimensional de las proteínas y por tanto, su normal funcionamiento; estos enlaces se forman con especial facilidad entre residuos de cisteína de la misma o de diferentes moléculas de péptidos.

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