Category:GO:0180062 ! protein O-linked galactosylation

name: protein O-linked galactosylation
namespace: biological_process
def: "A glycoprotein biosynthetic process starting with the covalent linkage of galactose via a beta-glycosidic bond to the oxygen atom of the hydroxyl group of a hydroxyproline or a hydroxylysine in a protein, which can be further elongated with the sequential addition of sugar units resulting in the formation of a protein O-linked glycan. Hydroxylysine modification occurs in the endoplasmic reticulum and is predominantly found in collagen. Hydroxyproline modification occurs in the Golgi and is found only in plant proteins." [GOC:curators, PMID:17516569, PMID:30822656, PMID:33815452]
is_a: GO:0006493 ! protein O-linked glycosylation

AmiGO <GOterm>GO:0180062</GOterm>
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