CD74 Antibody (YA3638)

Cell membrane; Single-pass type II membrane protein; Endoplasmic reticulum membrane; Golgi apparatus, trans-Golgi network; Endosome; Lysosome; Secreted; Late endosome; Lysosome

Tissue_specificity:Protein levels are detectable in urine; it accounts for 10% of total CD74 expression in B cells and 70% of total CD74 expression in other B cells.

P04233 has 5 isomers: P04233-1: 33516 Da (predicted); P04233-2: 26399 Da (predicted); P04233-3: 18328 Da (predicted); P04233-4: 31492 Da (predicted); P04233-5: 24375 Da (predicted).
O-glycosylated with core 1 or possibly core 8 glycans (PubMed:22171320, PubMed:23234360). Contains chondroitin sulfate (PubMed:25326458)

Homotrimer. In the endoplasmic reticulum (ER) it forms a heterononameric MHC II-Ii complex: 3 MHC class II molecules (heterodimers of an alpha and a beta subunit) bind to the CD74 homotrimer (also known as invariant chain or HLA class II histocompatibility antigen gamma chain). In the endosomal/lysosomal system, the CD74 component undergoes sequential degradation by various proteases, including CTSS and CTSL, leaving a small fragment termed CLIP (class-II-associated invariant chain peptide) attached to the MHC class II molecule (alpha-beta-CLIP complex). This processed complex interacts with HLA_DM and HLA_DO heterodimers in order to release CLIP and facilitate the binding of antigenic peptides to the MHC class II molecules. Interacts with CD44; this complex is essential for the MIF-induced signaling cascade that results in B cell survival

P04233

II; DHLAG; HLADG; Ia-GAMMA