UNIPROT #

P27797

PROTEIN NAME

Calreticulin

SYNONYMS

Autoantigen RO antibody; CALR antibody; CALR protein antibody; CALR_HUMAN antibody; Calregulin antibody; Calreticulin antibody; cC1qR antibody; CRP55 antibody; CRT antibody; CRTC antibody; Endoplasmic reticulum resident protein 60 antibody; Epididymis secretory sperm binding protein Li 99n antibody; ERp60 antibody; FLJ26680 antibody; grp60 antibody; HACBP antibody; HEL S 99n antibody; RO antibody; Sicca syndrome antigen A (autoantigen Ro; calreticulin) antibody; Sicca syndrome antigen A antibody; SSA antibody

SEQUENCE SIMILARITIES

Belongs to the calreticulin family.

SUBCELLULAR LOCATION

Endoplasmic reticulum. Secreted. Cytosol.

FUNCTION

Calnexin and calregulin (also called calreticulin) are calcium-binding proteins that are localized to the endoplasmic reticulum, Calnexin to the membrane and calregulin to the lumen. Calnexin is a type I membrane protein that interacts with newly synthesized glycoproteins in the endoplasmic reticulum. It may play a role in assisting with protein assembly and in retaining unassembled protein subunits in the endoplasmic reticulum. Calregulin has both low- and high-affinity calcium-binding sites. Neither Calnexin nor calregulin contains the calcium-binding "E-F hand" motif found in calmodulins. Calnexin and calregulin are important for the maturation of glycoproteins in the endoplasmic reticulum and appear to bind many of the same proteins.