| Structural highlights
Disease
BMPR2_HUMAN Defects in BMPR2 are the cause of primary pulmonary hypertension (PPH1) [MIM:178600. PPH1 is a rare autosomal dominant disorder characterized by plexiform lesions of proliferating endothelial cells in pulmonary arterioles. The lesions lead to elevated pulmonary arterial pression, right ventricular failure, and death. The disease can occur from infancy throughout life and it has a mean age at onset of 36 years. Penetrance is reduced. Although familial PPH1 is rare, cases secondary to known etiologies are more common and include those associated with the appetite-suppressant drugs.[1] [2] [3] [4] [5] [6] Defects in BMPR2 are a cause of pulmonary venoocclusive disease (PVOD) [MIM:265450. PVOD is a rare form of pulmonary hypertension in which the vascular changes originate in the small pulmonary veins and venules. The pathogenesis is unknown and any link with PPH1 has been speculative. The finding of PVOD associated with a BMPR2 mutation reveals a possible pathogenetic connection with PPH1.[7] [8]
Function
BMPR2_HUMAN On ligand binding, forms a receptor complex consisting of two type II and two type I transmembrane serine/threonine kinases. Type II receptors phosphorylate and activate type I receptors which autophosphorylate, then bind and activate SMAD transcriptional regulators. Binds to BMP-7, BMP-2 and, less efficiently, BMP-4. Binding is weak but enhanced by the presence of type I receptors for BMPs.
Publication Abstract from PubMed
Heterozygous mutations in BMPR2 (bone morphogenetic protein (BMP) receptor type II) cause pulmonary arterial hypertension. BMPRII is a receptor for over 15 BMP ligands, but why BMPR2 mutations cause lung-specific pathology is unknown. To elucidate the molecular basis of BMP:BMPRII interactions, we report crystal structures of binary and ternary BMPRII receptor complexes with BMP10, which contain an ensemble of seven different BMP10:BMPRII 1:1 complexes. BMPRII binds BMP10 at the knuckle epitope, with the A-loop and beta4 strand making BMPRII-specific interactions. The BMPRII binding surface on BMP10 is dynamic, and the affinity is weaker in the ternary complex than in the binary complex. Hydrophobic core and A-loop interactions are important in BMPRII-mediated signalling. Our data reveal how BMPRII is a low affinity receptor, implying that forming a signalling complex requires high concentrations of BMPRII, hence mutations will impact on tissues with highest BMPR2 expression such as the lung vasculature.
Crystal structures of BMPRII extracellular domain in binary and ternary receptor complexes with BMP10.,Guo J, Liu B, Thorikay M, Yu M, Li X, Tong Z, Salmon RM, Read RJ, Ten Dijke P, Morrell NW, Li W Nat Commun. 2022 May 3;13(1):2395. doi: 10.1038/s41467-022-30111-2. PMID:35504921[9]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
See Also
References
- ↑ Deng Z, Morse JH, Slager SL, Cuervo N, Moore KJ, Venetos G, Kalachikov S, Cayanis E, Fischer SG, Barst RJ, Hodge SE, Knowles JA. Familial primary pulmonary hypertension (gene PPH1) is caused by mutations in the bone morphogenetic protein receptor-II gene. Am J Hum Genet. 2000 Sep;67(3):737-44. Epub 2000 Jul 20. PMID:10903931 doi:10.1086/303059
- ↑ Thomson JR, Machado RD, Pauciulo MW, Morgan NV, Humbert M, Elliott GC, Ward K, Yacoub M, Mikhail G, Rogers P, Newman J, Wheeler L, Higenbottam T, Gibbs JS, Egan J, Crozier A, Peacock A, Allcock R, Corris P, Loyd JE, Trembath RC, Nichols WC. Sporadic primary pulmonary hypertension is associated with germline mutations of the gene encoding BMPR-II, a receptor member of the TGF-beta family. J Med Genet. 2000 Oct;37(10):741-5. PMID:11015450
- ↑ Lane KB, Machado RD, Pauciulo MW, Thomson JR, Phillips JA 3rd, Loyd JE, Nichols WC, Trembath RC. Heterozygous germline mutations in BMPR2, encoding a TGF-beta receptor, cause familial primary pulmonary hypertension. Nat Genet. 2000 Sep;26(1):81-4. PMID:10973254 doi:10.1038/79226
- ↑ Machado RD, Pauciulo MW, Thomson JR, Lane KB, Morgan NV, Wheeler L, Phillips JA 3rd, Newman J, Williams D, Galie N, Manes A, McNeil K, Yacoub M, Mikhail G, Rogers P, Corris P, Humbert M, Donnai D, Martensson G, Tranebjaerg L, Loyd JE, Trembath RC, Nichols WC. BMPR2 haploinsufficiency as the inherited molecular mechanism for primary pulmonary hypertension. Am J Hum Genet. 2001 Jan;68(1):92-102. Epub 2000 Dec 12. PMID:11115378
- ↑ Humbert M, Deng Z, Simonneau G, Barst RJ, Sitbon O, Wolf M, Cuervo N, Moore KJ, Hodge SE, Knowles JA, Morse JH. BMPR2 germline mutations in pulmonary hypertension associated with fenfluramine derivatives. Eur Respir J. 2002 Sep;20(3):518-23. PMID:12358323
- ↑ Sankelo M, Flanagan JA, Machado R, Harrison R, Rudarakanchana N, Morrell N, Dixon M, Halme M, Puolijoki H, Kere J, Elomaa O, Kupari M, Raisanen-Sokolowski A, Trembath RC, Laitinen T. BMPR2 mutations have short lifetime expectancy in primary pulmonary hypertension. Hum Mutat. 2005 Aug;26(2):119-24. PMID:15965979 doi:10.1002/humu.20200
- ↑ Runo JR, Vnencak-Jones CL, Prince M, Loyd JE, Wheeler L, Robbins IM, Lane KB, Newman JH, Johnson J, Nichols WC, Phillips JA 3rd. Pulmonary veno-occlusive disease caused by an inherited mutation in bone morphogenetic protein receptor II. Am J Respir Crit Care Med. 2003 Mar 15;167(6):889-94. Epub 2002 Nov 21. PMID:12446270 doi:10.1164/rccm.200208-861OC
- ↑ Machado RD, Aldred MA, James V, Harrison RE, Patel B, Schwalbe EC, Gruenig E, Janssen B, Koehler R, Seeger W, Eickelberg O, Olschewski H, Elliott CG, Glissmeyer E, Carlquist J, Kim M, Torbicki A, Fijalkowska A, Szewczyk G, Parma J, Abramowicz MJ, Galie N, Morisaki H, Kyotani S, Nakanishi N, Morisaki T, Humbert M, Simonneau G, Sitbon O, Soubrier F, Coulet F, Morrell NW, Trembath RC. Mutations of the TGF-beta type II receptor BMPR2 in pulmonary arterial hypertension. Hum Mutat. 2006 Feb;27(2):121-32. PMID:16429395 doi:10.1002/humu.20285
- ↑ Guo J, Liu B, Thorikay M, Yu M, Li X, Tong Z, Salmon RM, Read RJ, Ten Dijke P, Morrell NW, Li W. Crystal structures of BMPRII extracellular domain in binary and ternary receptor complexes with BMP10. Nat Commun. 2022 May 3;13(1):2395. PMID:35504921 doi:10.1038/s41467-022-30111-2
|
