Endocytic receptor which plays a role in lipoprotein, vitamin and iron metabolism by facilitating their uptake. Acts together with LRP2 to mediate endocytosis of high-density lipoproteins, GC, hemoglobin, ALB, TF and SCGB1A1. Acts together with AMN to mediate endocytosis of the CBLIF-cobalamin complex. Binds to ALB, MB, Kappa and lambda-light chains, TF, hemoglobin, GC, SCGB1A1, APOA1, high density lipoprotein, and the CBLIF-cobalamin complex. Ligand binding requires calcium. Serves as important transporter in several absorptive epithelia, including intestine, renal proximal tubules and embryonic yolk sac. May play an important role in the development of the peri-implantation embryo through internalization of APOA1 and cholesterol. Binds to LGALS3 at the maternal-fetal interface.

1. Cubilin is involved in 25(OH) vitamin D uptake by adipocytes. PMID: 29186386
2. In adult mouse testes, strong Cubn immunoreactivity was found in the elongating spermatids. In Sertoli cells and peritubular cells, Cubn immunoreactivity was weak throughout the testis development. In the inter-stitium, Cubn immunoreactivity was found in foetal Leydig cells, was weak to negligible in the stem cells and progenitor Leydig cells and was strong in immature and adult Leydig cells. PMID: 26148765
3. Cubilin deficiency reduces renal salvage and delivery back to the blood of albumin and apolipoprotein (apo)A-I, which decreases blood levels of albumin and apoA-I/HD PMID: 24357674
4. cubilin and megalin mRNA expression is under epigenetic control PMID: 23773363
5. plasma membrane binding of Fgf8, and most likely of the Fgf8 family members Fgf17 and Fgf18, to Cubn improves Fgf ligand endocytosis and availability to FgfRs, thus modulating Fgf signaling activity. PMID: 23592779
6. Impaired protein endocytosis caused by invalidation of ClC-5 primarily reflects a trafficking defect of megalin and cubilin in PTC. PMID: 12815097
7. Cubilin expression is pronounced in the extraembryonic visceral endoderm of embryos. Cubilin, is also expressed by a subpopulation of cells dispersed within the embryonic endoderm having a migratory morphology. PMID: 14983511
8. Amn is an essential component of the Cubn receptor complex PMID: 15342463
9. Cubilin is required for embryonic development and is essential for the formation of somites, and definitive endoderm. PMID: 16787536

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Apical cell membrane; Peripheral membrane protein. Cell membrane; Peripheral membrane protein. Membrane, coated pit. Endosome. Lysosome membrane; Peripheral membrane protein.

Expressed in kidney, thymus, ileum, placenta, small intestine and yolk sac. In kidney expressed on the apical brush border surface of proximal tubular cells, in particular in endosomes and recycling membranes vesicles, so-called dense apical tubules, whic

KEGG: mmu:65969

STRING: 10090.ENSMUSP00000089009

UniGene: Mm.313915