Desmosine

Desmosine

IUPAC name	4-(4-amino-4-carboxybutyl)-1-(5-amino-5-carboxypentyl)- 3,5-bis(3-amino-3-carboxypropyl)pyridinium
Molecular formula	C24H40N5O8
Molar mass	526.603
CAS number	[11003-57-9]
PubChem	25435
Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) Infobox disclaimer and references

A desmosine cross-link is formed when three allysyl side chains plus one unaltered lysyl side chain from the same or neighbouring polypeptides.

It is found in elastin. Desmosine causes a yellow color.

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v • d • e Protein primary structure and posttranslational modifications

General	Protein biosynthesis \| Peptide bond \| Proteolysis \| Racemization \| N-O acyl shift

N terminus	Acetylation \| Formylation \| Pyroglutamate \| Methylation \| Glycation \| Myristoylation (Gly) \| carbamylation

C terminus	Amidation \| Glycosyl phosphatidylinositol (GPI) \| O-methylation \| Glypiation \| Ubiquitination \| Sumoylation

Lysine	Methylation \| Acetylation \| Acylation \| Hydroxylation \| Ubiquitination \| SUMOylation \| Desmosine \| ADP-ribosylation \| Deamination and Oxidation to aldehyde

Cysteine	Disulfide bond \| Prenylation \| Palmitoylation

Serine/Threonine	Phosphorylation \| Glycosylation \| Methylidene-imidazolone (MIO) formation

Tyrosine	Phosphorylation \| Sulfation \| Porphyrin ring linkage \| Flavin linkage \| p-Hydroxybenzylidene-imidazolone formation \| Lysine tyrosyl quinone (LTQ) formation \| Topaquinone (TPQ) formation

Asparagine	Deamidation \| Glycosylation

Aspartate	Succinimide formation

Glutamine	Transglutamination

Glutamate	Carboxylation \| Methylation \| Polyglutamylation \| Polyglycylation

Arginine	Citrullination \| Methylation

Proline	Hydroxylation

←Amino acids Secondary structure→