A protein modification that effectively cross-links two L-cysteine residues to form L-cystine. [ PubMed : 1988019 PubMed : 3083866 PubMed : 2001356 PubMed : 2076469 PubMed : 7918467 ChEBI : 16283 PubMed : 8344916 PubMed : 366603 https://proteininformationresource.org/cgi-bin/resid?id=AA0025#CYS2 DeltaMass : 0 ]

Synonyms:

dicysteine

DISULFID Interchain

3,3'-dithiobis(2-aminopropanoic acid)

3,3'-dithiodialanine

3,3'-disulfane-1,2-diylbis(2-azanylpropanoic acid)

beta,beta'-diamino-beta,beta'-dicarboxydiethyldisulfide

3,3'-dithiobisalanine

XLNK-SCys-SCys

(2R,2'R)-3,3'-disulfane-1,2-diylbis(2-aminopropanoic acid)

bis(alpha-aminopropionic acid)-beta-disulfide

Cys2

bis(beta-amino-beta-carboxyethyl)disulfide

DISULFID

beta,beta'-dithiodialanine

L-cystine

Cystine ((Cys)2)

This is just here as a test because I lose it

Term information

Subsets

PSI-MOD-slim

Name from RESID
L-cystine
Alternate name from RESID
3,3'-dithiobisalanine
Misnomer tagged alternate name from RESID
2-amino-3-(2-amino-2-carboxy-ethyl)disulfanyl-propanoic acid
Alternate name from RESID
bis(alpha-aminopropionic acid)-beta-disulfide
Alternate name from RESID
3,3'-dithiobis(2-aminopropanoic acid)
Alternate name from RESID
3,3'-dithiodialanine
Alternate name from RESID
beta,beta'-diamino-beta,beta'-dicarboxydiethyldisulfide
Systematic name from RESID
(2R,2'R)-3,3'-disulfane-1,2-diylbis(2-aminopropanoic acid)
Alternate name from RESID
beta,beta'-dithiodialanine
Alternate name from RESID
bis(beta-amino-beta-carboxyethyl)disulfide
Label from MS DeltaMass
Cystine ((Cys)2)
Alternate name from RESID
3,3'-disulfane-1,2-diylbis(2-azanylpropanoic acid)
DiffAvg
  • -2.02
DiffFormula
  • C 0 H -2 N 0 O 0 S 0
DiffMono
  • -2.01565
Formula
  • C 6 H 8 N 2 O 2 S 2
MassAvg
  • 204.26
MassMono
  • 204.00272
Origin
  • C, C
Source
  • natural
comment
  • Cross-link 2; for formation of a disulfide bond between a peptide cysteine and a free cysteine, see MOD:00765.
has related synonym
  • 2-amino-3-(2-amino-2-carboxy-ethyl)disulfanyl-propanoic acid
id
  • MOD:00034