| Structural highlights
Disease
MYPC3_HUMAN Defects in MYBPC3 are the cause of familial hypertrophic cardiomyopathy type 4 (CMH4) [MIM:115197. Familial hypertrophic cardiomyopathy is a hereditary heart disorder characterized by ventricular hypertrophy, which is usually asymmetric and often involves the interventricular septum. The symptoms include dyspnea, syncope, collapse, palpitations, and chest pain. They can be readily provoked by exercise. The disorder has inter- and intrafamilial variability ranging from benign to malignant forms with high risk of cardiac failure and sudden cardiac death.[1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12] [13] [14] [15] [16] [17] [18] [19] [20]
Function
MYPC3_HUMAN Thick filament-associated protein located in the crossbridge region of vertebrate striated muscle a bands. In vitro it binds MHC, F-actin and native thin filaments, and modifies the activity of actin-activated myosin ATPase. It may modulate muscle contraction or may play a more structural role.
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
The large multidomain muscle protein myosin binding protein C (MyBP-C) has been implicated for some time in cardiac disease while until recently little was known about its structure and function. Here we present a detailed study of the central domain C5 of the cardiac isoform of MyBP-C. This domain is unusual in several aspects. Firstly it contains two sizeable insertions compared to the non-cardiac isoforms. The first insertion comprises the linker between domains cC4 and cC5 that is elongated by ten amino acid residues, the second insertion comprises an elongation of the CD-loop in the middle of the domain by approximately 30 amino acid residues. Secondly two point mutations linked to familial hypertrophic cardiomyopathy (FHC) have been identified in this domain. This work shows that the general fold of cC5 is in agreement with the IgI family of beta-sandwich structures. The long cardiac-specific linker between cC4 and cC5 is not a linker at all but an integral part of the fold of cC5, as evidenced by an unfolded mutant in which this segment was removed. The second insertion is shown to be unstructured, highly dynamic and mostly extended according to NMR relaxation measurements and analytical ultracentrifugation. The loss of several key interactions conserved in the CD-loop of the IgI fold is assumed to be responsible for the low stability of cC5 compared to other IgI domains from titin and MyBP-C itself. The low thermodynamic stability of cC5 is most evident in one of the two FHC-linked mutations, N755K (Asn115 in this construct) which is mainly unfolded with a small proportion of a native-like folded species. In contrast, the second FHC-linked mutation, R654H (Arg14 in this construct) is as well folded and stable as the wild-type. This residue is located in the extended beta-bulge at the N terminus of the protein, pointing towards the surface of the CFGA' beta-sheet. This position is in agreement with recent data pointing to a function of Arg654 in an intermolecular interaction with MyBP-C domain cC8.
Structure, stability and dynamics of the central domain of cardiac myosin binding protein C (MyBP-C): implications for multidomain assembly and causes for cardiomyopathy.,Idowu SM, Gautel M, Perkins SJ, Pfuhl M J Mol Biol. 2003 Jun 13;329(4):745-61. PMID:12787675[21]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
References
- ↑ Gautel M, Zuffardi O, Freiburg A, Labeit S. Phosphorylation switches specific for the cardiac isoform of myosin binding protein-C: a modulator of cardiac contraction? EMBO J. 1995 May 1;14(9):1952-60. PMID:7744002
- ↑ Carrier L, Bonne G, Bahrend E, Yu B, Richard P, Niel F, Hainque B, Cruaud C, Gary F, Labeit S, Bouhour JB, Dubourg O, Desnos M, Hagege AA, Trent RJ, Komajda M, Fiszman M, Schwartz K. Organization and sequence of human cardiac myosin binding protein C gene (MYBPC3) and identification of mutations predicted to produce truncated proteins in familial hypertrophic cardiomyopathy. Circ Res. 1997 Mar;80(3):427-34. PMID:9048664
- ↑ Niimura H, Bachinski LL, Sangwatanaroj S, Watkins H, Chudley AE, McKenna W, Kristinsson A, Roberts R, Sole M, Maron BJ, Seidman JG, Seidman CE. Mutations in the gene for cardiac myosin-binding protein C and late-onset familial hypertrophic cardiomyopathy. N Engl J Med. 1998 Apr 30;338(18):1248-57. PMID:9562578
- ↑ Yu B, French JA, Carrier L, Jeremy RW, McTaggart DR, Nicholson MR, Hambly B, Semsarian C, Richmond DR, Schwartz K, Trent RJ. Molecular pathology of familial hypertrophic cardiomyopathy caused by mutations in the cardiac myosin binding protein C gene. J Med Genet. 1998 Mar;35(3):205-10. PMID:9541104
- ↑ Moolman-Smook JC, Mayosi B, Brink P, Corfield VA. Identification of a new missense mutation in MyBP-C associated with hypertrophic cardiomyopathy. J Med Genet. 1998 Mar;35(3):253-4. PMID:9541115
- ↑ Maron BJ, Niimura H, Casey SA, Soper MK, Wright GB, Seidman JG, Seidman CE. Development of left ventricular hypertrophy in adults in hypertrophic cardiomyopathy caused by cardiac myosin-binding protein C gene mutations. J Am Coll Cardiol. 2001 Aug;38(2):315-21. PMID:11499718
- ↑ Erdmann J, Raible J, Maki-Abadi J, Hummel M, Hammann J, Wollnik B, Frantz E, Fleck E, Hetzer R, Regitz-Zagrosek V. Spectrum of clinical phenotypes and gene variants in cardiac myosin-binding protein C mutation carriers with hypertrophic cardiomyopathy. J Am Coll Cardiol. 2001 Aug;38(2):322-30. PMID:11499719
- ↑ Daehmlow S, Erdmann J, Knueppel T, Gille C, Froemmel C, Hummel M, Hetzer R, Regitz-Zagrosek V. Novel mutations in sarcomeric protein genes in dilated cardiomyopathy. Biochem Biophys Res Commun. 2002 Oct 18;298(1):116-20. PMID:12379228
- ↑ Niimura H, Patton KK, McKenna WJ, Soults J, Maron BJ, Seidman JG, Seidman CE. Sarcomere protein gene mutations in hypertrophic cardiomyopathy of the elderly. Circulation. 2002 Jan 29;105(4):446-51. PMID:11815426
- ↑ Nanni L, Pieroni M, Chimenti C, Simionati B, Zimbello R, Maseri A, Frustaci A, Lanfranchi G. Hypertrophic cardiomyopathy: two homozygous cases with "typical" hypertrophic cardiomyopathy and three new mutations in cases with progression to dilated cardiomyopathy. Biochem Biophys Res Commun. 2003 Sep 19;309(2):391-8. PMID:12951062
- ↑ Richard P, Charron P, Carrier L, Ledeuil C, Cheav T, Pichereau C, Benaiche A, Isnard R, Dubourg O, Burban M, Gueffet JP, Millaire A, Desnos M, Schwartz K, Hainque B, Komajda M. Hypertrophic cardiomyopathy: distribution of disease genes, spectrum of mutations, and implications for a molecular diagnosis strategy. Circulation. 2003 May 6;107(17):2227-32. Epub 2003 Apr 21. PMID:12707239 doi:10.1161/01.CIR.0000066323.15244.54
- ↑ Erdmann J, Daehmlow S, Wischke S, Senyuva M, Werner U, Raible J, Tanis N, Dyachenko S, Hummel M, Hetzer R, Regitz-Zagrosek V. Mutation spectrum in a large cohort of unrelated consecutive patients with hypertrophic cardiomyopathy. Clin Genet. 2003 Oct;64(4):339-49. PMID:12974739
- ↑ Alders M, Jongbloed R, Deelen W, van den Wijngaard A, Doevendans P, Ten Cate F, Regitz-Zagrosek V, Vosberg HP, van Langen I, Wilde A, Dooijes D, Mannens M. The 2373insG mutation in the MYBPC3 gene is a founder mutation, which accounts for nearly one-fourth of the HCM cases in the Netherlands. Eur Heart J. 2003 Oct;24(20):1848-53. PMID:14563344
- ↑ Konno T, Shimizu M, Ino H, Matsuyama T, Yamaguchi M, Terai H, Hayashi K, Mabuchi T, Kiyama M, Sakata K, Hayashi T, Inoue M, Kaneda T, Mabuchi H. A novel missense mutation in the myosin binding protein-C gene is responsible for hypertrophic cardiomyopathy with left ventricular dysfunction and dilation in elderly patients. J Am Coll Cardiol. 2003 Mar 5;41(5):781-6. PMID:12628722
- ↑ Morner S, Richard P, Kazzam E, Hellman U, Hainque B, Schwartz K, Waldenstrom A. Identification of the genotypes causing hypertrophic cardiomyopathy in northern Sweden. J Mol Cell Cardiol. 2003 Jul;35(7):841-9. PMID:12818575
- ↑ Andersen PS, Havndrup O, Bundgaard H, Larsen LA, Vuust J, Pedersen AK, Kjeldsen K, Christiansen M. Genetic and phenotypic characterization of mutations in myosin-binding protein C (MYBPC3) in 81 families with familial hypertrophic cardiomyopathy: total or partial haploinsufficiency. Eur J Hum Genet. 2004 Aug;12(8):673-7. PMID:15114369 doi:10.1038/sj.ejhg.5201190
- ↑ Van Driest SL, Vasile VC, Ommen SR, Will ML, Tajik AJ, Gersh BJ, Ackerman MJ. Myosin binding protein C mutations and compound heterozygosity in hypertrophic cardiomyopathy. J Am Coll Cardiol. 2004 Nov 2;44(9):1903-10. PMID:15519027 doi:S0735-1097(04)01614-6
- ↑ Song L, Zou Y, Wang J, Wang Z, Zhen Y, Lou K, Zhang Q, Wang X, Wang H, Li J, Hui R. Mutations profile in Chinese patients with hypertrophic cardiomyopathy. Clin Chim Acta. 2005 Jan;351(1-2):209-16. PMID:15563892 doi:10.1016/j.cccn.2004.09.016
- ↑ Ingles J, Doolan A, Chiu C, Seidman J, Seidman C, Semsarian C. Compound and double mutations in patients with hypertrophic cardiomyopathy: implications for genetic testing and counselling. J Med Genet. 2005 Oct;42(10):e59. PMID:16199542 doi:10.1136/jmg.2005.033886
- ↑ Morita H, Rehm HL, Menesses A, McDonough B, Roberts AE, Kucherlapati R, Towbin JA, Seidman JG, Seidman CE. Shared genetic causes of cardiac hypertrophy in children and adults. N Engl J Med. 2008 May 1;358(18):1899-908. doi: 10.1056/NEJMoa075463. Epub 2008, Apr 9. PMID:18403758 doi:10.1056/NEJMoa075463
- ↑ Idowu SM, Gautel M, Perkins SJ, Pfuhl M. Structure, stability and dynamics of the central domain of cardiac myosin binding protein C (MyBP-C): implications for multidomain assembly and causes for cardiomyopathy. J Mol Biol. 2003 Jun 13;329(4):745-61. PMID:12787675
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