NPHP4 explained

Nephrocystin-4 is a protein that in humans is encoded by the NPHP4 gene.^{[1] [2] [3]}

This gene encodes a protein which contains a proline-rich region. The encoded protein may function in renal tubular development and function.

This protein interacts with nephrocystin. Mutations in this gene are associated with nephronophthisis type 4. Multiple alternative transcript variants have been described but their full-length nature has not been determined.

Further reading

• Ishikawa K, Nagase T, Suyama M, etal . Prediction of the coding sequences of unidentified human genes. X. The complete sequences of 100 new cDNA clones from brain which can code for large proteins in vitro. . DNA Res. . 5 . 3 . 169–76 . 1998 . 9734811 . 10.1093/dnares/5.3.169 . free .
• Donaldson JC, Dise RS, Ritchie MD, Hanks SK . Nephrocystin-conserved domains involved in targeting to epithelial cell-cell junctions, interaction with filamins, and establishing cell polarity. . J. Biol. Chem. . 277 . 32 . 29028–35 . 2002 . 12006559 . 10.1074/jbc.M111697200 . free .
• Mollet G, Salomon R, Gribouval O, etal . The gene mutated in juvenile nephronophthisis type 4 encodes a novel protein that interacts with nephrocystin. . Nat. Genet. . 32 . 2 . 300–5 . 2002 . 12244321 . 10.1038/ng996 . 24216974 .
• Strausberg RL, Feingold EA, Grouse LH, etal . Generation and initial analysis of more than 15,000 full-length human and mouse cDNA sequences. . Proc. Natl. Acad. Sci. U.S.A. . 99 . 26 . 16899–903 . 2003 . 12477932 . 10.1073/pnas.242603899 . 139241 . 2002PNAS...9916899M . free .
• Ota T, Suzuki Y, Nishikawa T, etal . Complete sequencing and characterization of 21,243 full-length human cDNAs. . Nat. Genet. . 36 . 1 . 40–5 . 2004 . 14702039 . 10.1038/ng1285 . free .
• Mollet G, Silbermann F, Delous M, etal . Characterization of the nephrocystin/nephrocystin-4 complex and subcellular localization of nephrocystin-4 to primary cilia and centrosomes. . Hum. Mol. Genet. . 14 . 5 . 645–56 . 2005 . 15661758 . 10.1093/hmg/ddi061 . free .
• Hoefele J, Sudbrak R, Reinhardt R, etal . Mutational analysis of the NPHP4 gene in 250 patients with nephronophthisis. . Hum. Mutat. . 25 . 4 . 411 . 2006 . 15776426 . 10.1002/humu.9326 . 2027.42/39127 . 20251528 . free .
• Roepman R, Letteboer SJ, Arts HH, etal . Interaction of nephrocystin-4 and RPGRIP1 is disrupted by nephronophthisis or Leber congenital amaurosis-associated mutations. . Proc. Natl. Acad. Sci. U.S.A. . 102 . 51 . 18520–5 . 2006 . 16339905 . 10.1073/pnas.0505774102 . 1317916 . free .
• Szafranski K, Schindler S, Taudien S, etal . Violating the splicing rules: TG dinucleotides function as alternative 3' splice sites in U2-dependent introns. . Genome Biology. 8 . 8 . R154 . 2007. 17672918 . 10.1186/gb-2007-8-8-r154 . 2374985 . free .
• Mistry K, Ireland JH, Ng RC, etal . Novel mutations in NPHP4 in a consanguineous family with histological findings of focal segmental glomerulosclerosis. . Am. J. Kidney Dis. . 50 . 5 . 855–64 . 2007 . 17954299 . 10.1053/j.ajkd.2007.08.009 .

Notes and References

1. Schuermann MJ, Otto E, Becker A, Saar K, Ruschendorf F, Polak BC, Ala-Mello S, Hoefele J, Wiedensohler A, Haller M, Omran H, Nurnberg P, Hildebrandt F . Mapping of gene loci for nephronophthisis type 4 and Senior-Loken syndrome, to chromosome 1p36 . Am J Hum Genet . 70 . 5 . 1240–6 . Apr 2002 . 11920287 . 447598 . 10.1086/340317 .
2. Otto E, Hoefele J, Ruf R, Mueller AM, Hiller KS, Wolf MT, Schuermann MJ, Becker A, Birkenhager R, Sudbrak R, Hennies HC, Nurnberg P, Hildebrandt F . A gene mutated in nephronophthisis and retinitis pigmentosa encodes a novel protein, nephroretinin, conserved in evolution . Am J Hum Genet . 71 . 5 . 1161–7 . Oct 2002 . 12205563 . 385091 . 10.1086/344395 .
3. Web site: Entrez Gene: NPHP4 nephronophthisis 4.