Nephronectin (NPNT)

EGFL6L; POEM; Preosteoblast EGF-like repeat protein with MAM domain; Protein EGFL6-like

SPN	P214
HGNC	27405
MGI	2148811
PubMed	22613833
UniProt	Q6UXI9

Nephronectin contains 561 amino acids. In situ hybridization detected nephronectin in the developing mouse kidney and in several other tissues and organs. Expression appeared particularly prominent at epithelial-mesenchymal interfaces in tissues undergoing morphogenesis.

The deduced 565- and 582-amino acid proteins have calculated molecular masses of 61.9 and 64.0 kD, respectively. Both proteins contain an N-terminal signal sequence, followed by 5 EGF domains, and a C-terminal MAM domain. They also contain an RGD integrin-binding site, a potential glycosylation site, and a potential tyrosine phosphorylation site. EGF repeats 2, 4, and 5 contain Ca(2+)-binding EGF domains. In the longer variant, the 17 additional amino acids are inserted N-terminal to the first EGF domain.

Reference

"The secreted protein discovery initiative (SPDI), a large-scale effort to identify novel human secreted and transmembrane proteins: a bioinformatics assessment."
Genome Res. 13:2265-2270(2003) [PubMed] [Europe PMC] [Abstract]

"Complete sequencing and characterization of 21,243 full-length human cDNAs."
Nat. Genet. 36:40-45(2004) [PubMed] [Europe PMC] [Abstract]

"Generation and annotation of the DNA sequences of human chromosomes 2 and 4."
Nature 434:724-731(2005) [PubMed] [Europe PMC] [Abstract]

"Identification and characterization of a novel human nephronectin gene in silico."
Int. J. Mol. Med. 15:719-724(2005) [PubMed] [Europe PMC] [Abstract]