| Structural highlights
1yk0 is a 3 chain structure with sequence from Homo sapiens. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
| | Ligands: | ,
| | Related: | 1yk1 |
| Gene: | NPR3, ANPRC (Homo sapiens) |
| Resources: | FirstGlance, OCA, RCSB, PDBsum |
Disease
[ANF_HUMAN] Defects in NPPA are the cause of familial atrial fibrillation type 6 (ATFB6) [MIM:612201]. Atrial fibrillation is a common disorder of cardiac rhythm that is hereditary in a small subgroup of patients. It is characterized by disorganized atrial electrical activity, progressive deterioration of atrial electromechanical function and ineffective pumping of blood into the ventricles. It can be associated with palpitations, syncope, thromboembolic stroke, and congestive heart failure.[1]
Function
[ANF_HUMAN] Hormone playing a key role in cardiovascular homeostasis through regulation of natriuresis, diuresis, and vasodilation. Also plays a role in female pregnancy by promoting trophoblast invasion and spiral artery remodeling in uterus. Specifically binds and stimulates the cGMP production of the NPR1 receptor. Binds the clearance receptor NPR3.[2]
Evolutionary Conservation
Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf.
Publication Abstract from PubMed
Cardiovascular homeostasis and blood pressure regulation are reliant, in part, on interactions between natriuretic peptide (NP) hormones and natriuretic peptide receptors (NPR). The C-type NPR (NPR-C) is responsible for clearance of NP hormones from the circulation, and displays a cross-reactivity for all NP hormones (ANP, BNP, and CNP), in contrast to other NPRs, which are more restricted in their specificity. In order to elucidate the structural determinants for the binding specificity and cross-reactivity of NPR-C with NP hormones, we have determined the crystal structures of the complexes of NPR-C with atrial natriuretic peptide (ANP), and with brain natriuretic peptide (BNP). A structural comparison of these complexes, with the previous structure of the NPR-C/CNP complex, reveals that NPR-C uses a conformationally inflexible surface to bind three different, highly flexible, NP ligands. The complex structures support a mechanism of rigid promiscuity rather than conformational plasticity by the receptor. While ANP and BNP appear to adopt similar receptor-bound conformations, the CNP structure diverges, yet shares sets of common receptor contacts with the other ligands. The degenerate versus selective hormone recognition properties of different NPRs appears to derive largely from two cavities on the receptor surfaces, pocket I and pocket II, that serve as anchoring sites for hormone side-chains and modulate receptor selectivity.
Structural determinants of natriuretic peptide receptor specificity and degeneracy.,He XL, Dukkipati A, Garcia KC J Mol Biol. 2006 Aug 25;361(4):698-714. Epub 2006 Jul 10. PMID:16870210[3]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
References
- ↑ Hodgson-Zingman DM, Karst ML, Zingman LV, Heublein DM, Darbar D, Herron KJ, Ballew JD, de Andrade M, Burnett JC Jr, Olson TM. Atrial natriuretic peptide frameshift mutation in familial atrial fibrillation. N Engl J Med. 2008 Jul 10;359(2):158-65. PMID:18614783 doi:359/2/158
- ↑ Koller KJ, Lowe DG, Bennett GL, Minamino N, Kangawa K, Matsuo H, Goeddel DV. Selective activation of the B natriuretic peptide receptor by C-type natriuretic peptide (CNP). Science. 1991 Apr 5;252(5002):120-3. PMID:1672777
- ↑ He XL, Dukkipati A, Garcia KC. Structural determinants of natriuretic peptide receptor specificity and degeneracy. J Mol Biol. 2006 Aug 25;361(4):698-714. Epub 2006 Jul 10. PMID:16870210 doi:10.1016/j.jmb.2006.06.060
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