Nephrin

NPHS1
Available structures PDB Ortholog search: PDBe RCSB List of PDB id codes 4ZRT
Identifiers
Aliases	NPHS1, CNF, NPHN, nephrin, NPHS1 nephrin, nephrin, NPHS1 adhesion molecule, nephrin
External IDs	OMIM: 602716; MGI: 1859637; HomoloGene: 20974; GeneCards: NPHS1; OMA:NPHS1 - orthologs
Gene location (Human) Chr. Chromosome 19 (human) Band 19q13.12 Start 35,825,372 bp End 35,869,287 bp
Gene location (Mouse) Chr. Chromosome 7 (mouse) Band 7|7 B1 Start 30,157,740 bp End 30,186,648 bp
RNA expression pattern Bgee Human Mouse (ortholog) Top expressed in buccal mucosa cell body of pancreas vena cava tendon of biceps brachii Skeletal muscle tissue of rectus abdominis glomerulus metanephric glomerulus human kidney mucosa of pharynx nipple Top expressed in glomerulus embryo embryo morula neural layer of retina gastrula blastocyst dentate gyrus of hippocampal formation granule cell right kidney pancreas More reference expression data BioGPS n/a
Gene ontology Molecular function myosin binding protein binding Cellular component integral component of membrane cell projection membrane plasma membrane integral component of plasma membrane intracellular anatomical structure slit diaphragm extracellular exosome focal adhesion Biological process excretion glomerular visceral epithelial cell development positive regulation of actin filament polymerization glomerular basement membrane development muscle organ development regulation of excretion MAPK cascade multicellular organism development JNK cascade cell adhesion myoblast fusion skeletal muscle tissue development protein localization to synapse axon guidance T cell costimulation Sources:Amigo / QuickGO
Orthologs Species Human Mouse Entrez 4868 54631 Ensembl ENSG00000161270 ENSMUSG00000006649 UniProt O60500 Q9QZS7 RefSeq (mRNA) NM_004646 NM_019459 RefSeq (protein) NP_004637 NP_062332 Location (UCSC) Chr 19: 35.83 – 35.87 Mb Chr 7: 30.16 – 30.19 Mb PubMed search
Wikidata
View/Edit Human View/Edit Mouse

Nephrin is a protein necessary for the proper functioning of the renal filtration barrier. The renal filtration barrier consists of fenestrated endothelial cells, the glomerular basement membrane, and the podocytes of epithelial cells. Nephrin is a transmembrane protein that is a structural component of the slit diaphragm. It is present on the tips of the podocytes as an intricate mesh connecting adjacent foot processes. Nephrin contributes to the strong size selectivity of the slit diaphragm, however, the relative contribution of the slit diaphragm to exclusion of protein by the glomerulus is debated. The extracellular interactions, both homophilic and heterophilic—between nephrin and NEPH1—are not completely understood. In addition to eight immunoglobulin G–like motifs and a fibronectin type 3 repeat, nephrin has a single transmembrane domain and a short intracellular tail. Tyrosine phosphorylation at different sites on the intracellular tail contribute to the regulation of slit diaphragm formation during development and repair in pathology affecting podocytes. Podocin may interact with nephrin to guide it onto lipid rafts in podocytes, requiring the integrity of an arginine residue of nephrin at position 1160.

A defect in the gene for nephrin, NPHS1, is associated with congenital nephrotic syndrome of the Finnish type and causes massive amounts of protein to be leaked into the urine, or proteinuria. Nephrin is also required for cardiovascular development.

Interactions

Nephrin has been shown to interact with:

• CASK,
• CD2AP,
• CDH3 and
• CTNND1,
• FYN,
• KIRREL, and
• NPHS2.

See also

• Podocyte

Further reading

• Tryggvason K (2002). "Nephrin: role in normal kidney and in disease". Adv. Nephrol. Necker Hosp. 31: 221–34. PMID 11692461.
• Kestilä M, Lenkkeri U, Männikkö M, Lamerdin J, McCready P, Putaala H, Ruotsalainen V, Morita T, Nissinen M, Herva R, Kashtan CE, Peltonen L, Holmberg C, Olsen A, Tryggvason K (1998). "Positionally cloned gene for a novel glomerular protein--nephrin--is mutated in congenital nephrotic syndrome". Mol. Cell. 1 (4): 575–82. doi:10.1016/S1097-2765(00)80057-X. PMID 9660941.
• Lenkkeri U, Männikkö M, McCready P, Lamerdin J, Gribouval O, Niaudet PM, Antignac CK, Kashtan CE, Homberg C, Olsen A, Kestilä M, Tryggvason K (1999). "Structure of the gene for congenital nephrotic syndrome of the finnish type (NPHS1) and characterization of mutations". Am. J. Hum. Genet. 64 (1): 51–61. doi:10.1086/302182. PMC 1377702. PMID 9915943.
• Ruotsalainen V, Ljungberg P, Wartiovaara J, Lenkkeri U, Kestilä M, Jalanko H, Holmberg C, Tryggvason K (1999). "Nephrin is specifically located at the slit diaphragm of glomerular podocytes". Proc. Natl. Acad. Sci. U.S.A. 96 (14): 7962–7. Bibcode:1999PNAS...96.7962R. doi:10.1073/pnas.96.14.7962. PMC 22170. PMID 10393930.
• Bolk S, Puffenberger EG, Hudson J, Morton DH, Chakravarti A (2000). "Elevated frequency and allelic heterogeneity of congenital nephrotic syndrome, Finnish type, in the old order Mennonites". Am. J. Hum. Genet. 65 (6): 1785–90. doi:10.1086/302687. PMC 1288392. PMID 10577936.
• Aya K, Tanaka H, Seino Y (2000). "Novel mutation in the nephrin gene of a Japanese patient with congenital nephrotic syndrome of the Finnish type". Kidney Int. 57 (2): 401–4. doi:10.1046/j.1523-1755.2000.00859.x. PMID 10652016.
• Li C, Ruotsalainen V, Tryggvason K, Shaw AS, Miner JH (2000). "CD2AP is expressed with nephrin in developing podocytes and is found widely in mature kidney and elsewhere". Am. J. Physiol. Renal Physiol. 279 (4): F785–92. doi:10.1152/ajprenal.2000.279.4.F785. PMID 10997929. S2CID 37166239.
• Huber TB, Kottgen M, Schilling B, Walz G, Benzing T (2001). "Interaction with podocin facilitates nephrin signaling". J. Biol. Chem. 276 (45): 41543–6. doi:10.1074/jbc.C100452200. PMID 11562357.
• Palmén T, Ahola H, Palgi J, Aaltonen P, Luimula P, Wang S, Jaakkola I, Knip M, Otonkoski T, Holthöfer H (2002). "Nephrin is expressed in the pancreatic beta cells". Diabetologia. 44 (10): 1274–80. doi:10.1007/s001250100641. PMID 11692176.
• Schwarz K, Simons M, Reiser J, Saleem MA, Faul C, Kriz W, Shaw AS, Holzman LB, Mundel P (2002). "Podocin, a raft-associated component of the glomerular slit diaphragm, interacts with CD2AP and nephrin". J. Clin. Invest. 108 (11): 1621–9. doi:10.1172/JCI12849. PMC 200981. PMID 11733557.
• Koziell A, Grech V, Hussain S, Lee G, Lenkkeri U, Tryggvason K, Scambler P (2002). "Genotype/phenotype correlations of NPHS1 and NPHS2 mutations in nephrotic syndrome advocate a functional inter-relationship in glomerular filtration". Hum. Mol. Genet. 11 (4): 379–88. doi:10.1093/hmg/11.4.379. PMID 11854170.
• Yan K, Khoshnoodi J, Ruotsalainen V, Tryggvason K (2002). "N-linked glycosylation is critical for the plasma membrane localization of nephrin". J. Am. Soc. Nephrol. 13 (5): 1385–9. doi:10.1097/01.ASN.0000013297.11876.5B. PMID 11961028.
• Shimizu J, Tanaka H, Aya K, Ito S, Sado Y, Seino Y (2002). "A missense mutation in the nephrin gene impairs membrane targeting". Am. J. Kidney Dis. 40 (4): 697–703. doi:10.1053/ajkd.2002.35676. PMID 12324903.
• Saleem MA, Ni L, Witherden I, Tryggvason K, Ruotsalainen V, Mundel P, Mathieson PW (2002). "Co-localization of nephrin, podocin, and the actin cytoskeleton: evidence for a role in podocyte foot process formation". Am. J. Pathol. 161 (4): 1459–66. doi:10.1016/S0002-9440(10)64421-5. PMC 1867300. PMID 12368218.
• Kim BK, Hong HK, Kim JH, Lee HS (2002). "Differential expression of nephrin in acquired human proteinuric diseases". Am. J. Kidney Dis. 40 (5): 964–73. doi:10.1053/ajkd.2002.36328. PMID 12407641.
• Langham RG, Kelly DJ, Cox AJ, Thomson NM, Holthöfer H, Zaoui P, Pinel N, Cordonnier DJ, Gilbert RE (2003). "Proteinuria and the expression of the podocyte slit diaphragm protein, nephrin, in diabetic nephropathy: effects of angiotensin converting enzyme inhibition". Diabetologia. 45 (11): 1572–6. doi:10.1007/s00125-002-0946-y. PMID 12436341.
• Gigante M, Monno F, Roberto R, Laforgia N, Assael MB, Livolti S, Caringella A, La Manna A, Masella L, Iolascon A (2003). "Congenital nephrotic syndrome of the Finnish type in Italy: a molecular approach". J. Nephrol. 15 (6): 696–702. PMID 12495287.
• Pettersson-Fernholm K, Forsblom C, Perola M, Groop PH (2003). "Polymorphisms in the nephrin gene and diabetic nephropathy in type 1 diabetic patients". Kidney Int. 63 (4): 1205–10. doi:10.1046/j.1523-1755.2003.00855.x. PMID 12631336.
• Kapodistria K, Tsilibary EP, Politis P, Moustardas P, Charonis A, Kitsiou P (2015). "Nephrin, a transmembrane protein, is involved in pancreatic beta-cell survival signaling". Mol. Cell. Endocrinol. 400: 112–28. doi:10.1016/j.mce.2014.11.003. PMID 25448064.

External links

• nephrin at the U.S. National Library of Medicine Medical Subject Headings (MeSH)