Calr or Calreticulin is a calcium-binding chaperone that promotes folding, oligomeric assembly and quality control in the endoplasmic reticulum (ER) via the calreticulin/calnexin cycle. Calr, a lectin, interacts transiently with almost all of the monoglucosylated glycoproteins that are synthesized in the ER. Calr also interacts with with the DNA-binding domain of NR3C1 and mediates its nuclear export. It may also be involved in maternal gene expression regulation and oocyte maturation via the regulation of calcium homeostasis.
Protein Aliases: Autoantigen RO; CABP3; CALBP; Calcium-binding protein 3; Calregulin; Calreticulin; CRP55; Endoplasmic reticulum resident protein 60; epididymis secretory sperm binding protein Li 99n; ERp60; FLJ26680; grp60; HACBP; Ro/SS-A Antigen; Sicca syndrome antigen A (autoantigen Ro; calreticulin)
Gene Aliases: CALR; Calregulin; cC1qR; CRT; CRTC; HEL-S-99n; RO; SSA
Molecular Function: calcium-binding protein