IgA displays site- and subclass-specific glycoform differences despite equal glycoenzyme expression.

ABSTRACT:

Background

Glycosylation is an important posttranslational modification of proteins and in most cases indispensable for proper protein function. Like most soluble proteins, IgA, the second most prevalent antibody in human serum, contains several N- and O-glycosylation sites. While for IgG the impact of Fc glycosylation on effector functions and inflammatory potential has been studied intensively, only little is known for IgA. In addition, only glimpses exist regarding the regulation of IgA glycosylation. We have previously shown that IgA1 and IgA2 differ functionally and also show differences in their glycosylation pattern. The more pro-inflammatory IgA2 which is linked to autoimmune diseases displays decreased sialylation, galactosylation, fucosylation and bisection as compared to

SUBMITTER: Falck D 

PROVIDER: S-EPMC11834270 | biostudies-literature | 2025 Feb

REPOSITORIES: biostudies-literature