4q3h

Structural highlights

Disease

NHRF1_HUMAN Defects in SLC9A3R1 are the cause of hypophosphatemic nephrolithiasis/osteoporosis type 2 (NPHLOP2) [MIM:612287. Hypophosphatemia results from idiopathic renal phosphate loss. It contributes to the pathogenesis of hypophosphatemic urolithiasis (formation of urinary calculi) as well to that of hypophosphatemic osteoporosis (bone demineralization).^{[1] [2]}

Function

NHRF1_HUMAN Scaffold protein that connects plasma membrane proteins with members of the ezrin/moesin/radixin family and thereby helps to link them to the actin cytoskeleton and to regulate their surface expression. Necessary for recycling of internalized ADRB2. Was first known to play a role in the regulation of the activity and subcellular location of SLC9A3. Necessary for cAMP-mediated phosphorylation and inhibition of SLC9A3. May enhance Wnt signaling. May participate in HTR4 targeting to microvilli (By similarity). Involved in the regulation of phosphate reabsorption in the renal proximal tubules.^{[3] [4] [5] [6]}

See Also

• Sodium-hydrogen exchange regulatory factor
• Sodium-hydrogen exchange regulatory factor 3D structures

References

1. ↑ Karim Z, Gerard B, Bakouh N, Alili R, Leroy C, Beck L, Silve C, Planelles G, Urena-Torres P, Grandchamp B, Friedlander G, Prie D. NHERF1 mutations and responsiveness of renal parathyroid hormone. N Engl J Med. 2008 Sep 11;359(11):1128-35. PMID:18784102 doi:359/11/1128
2. ↑ Courbebaisse M, Leroy C, Bakouh N, Salaun C, Beck L, Grandchamp B, Planelles G, Hall RA, Friedlander G, Prie D. A new human NHERF1 mutation decreases renal phosphate transporter NPT2a expression by a PTH-independent mechanism. PLoS One. 2012;7(4):e34764. doi: 10.1371/journal.pone.0034764. Epub 2012 Apr 10. PMID:22506049 doi:10.1371/journal.pone.0034764
3. ↑ Murthy A, Gonzalez-Agosti C, Cordero E, Pinney D, Candia C, Solomon F, Gusella J, Ramesh V. NHE-RF, a regulatory cofactor for Na(+)-H+ exchange, is a common interactor for merlin and ERM (MERM) proteins. J Biol Chem. 1998 Jan 16;273(3):1273-6. PMID:9430655
4. ↑ Yun CH, Oh S, Zizak M, Steplock D, Tsao S, Tse CM, Weinman EJ, Donowitz M. cAMP-mediated inhibition of the epithelial brush border Na+/H+ exchanger, NHE3, requires an associated regulatory protein. Proc Natl Acad Sci U S A. 1997 Apr 1;94(7):3010-5. PMID:9096337
5. ↑ Cao TT, Deacon HW, Reczek D, Bretscher A, von Zastrow M. A kinase-regulated PDZ-domain interaction controls endocytic sorting of the beta2-adrenergic receptor. Nature. 1999 Sep 16;401(6750):286-90. PMID:10499588 doi:10.1038/45816
6. ↑ Karim Z, Gerard B, Bakouh N, Alili R, Leroy C, Beck L, Silve C, Planelles G, Urena-Torres P, Grandchamp B, Friedlander G, Prie D. NHERF1 mutations and responsiveness of renal parathyroid hormone. N Engl J Med. 2008 Sep 11;359(11):1128-35. PMID:18784102 doi:359/11/1128