ANKRD1

Human cardiac ankyrin repeat protein is a 36.2kDa protein composed of 319 amino acids.,{{cite web|title=Protein sequence of human ANKRD1 (Uniprot ID: Q15327)|url=http://www.heartproteome.org/copa/ProteinInfo.aspx?QType=Protein%20ID&QValue=Q15327|website=Cardiac Organellar Protein Atlas Knowledgebase|access-date=23 June 2015|archive-url=https://web.archive.org/web/20150623183847/http://www.heartproteome.org/copa/ProteinInfo.aspx?QType=Protein%20ID&QValue=Q15327|archive-date=23 June 2015|url-status=dead}} though in cardiomyocytes, CARP can exist as multiple alternatively spliced forms.{{cite journal | vauthors = Torrado M, Iglesias R, Nespereira B, Centeno A, López E, Mikhailov AT | title = Intron retention generates ANKRD1 splice variants that are co-regulated with the main transcript in normal and failing myocardium | journal = Gene | volume = 440 | issue = 1–2 | pages = 28–41 | date = Jul 2009 | pmid = 19341785 | doi = 10.1016/j.gene.2009.03.017 | hdl = 2183/20009 | hdl-access = free }} CARP contains five tandem ankyrin repeats. Studies have shown that CARP can homodimerize.{{cite journal | vauthors = Witt SH, Labeit D, Granzier H, Labeit S, Witt CC | title = Dimerization of the cardiac ankyrin protein CARP: implications for MARP titin-based signaling | journal = Journal of Muscle Research and Cell Motility | volume = 26 | issue = 6–8 | pages = 401–8 | date = 2005 | pmid = 16450059 | doi = 10.1007/s10974-005-9022-9 | s2cid = 22939053 }} Studies have also shown that CARP is N-terminally, post-translationally cleaved by calpain-3 in skeletal muscle, suggesting alternate bioactive forms of CARP exist.{{cite journal | vauthors = Laure L, Danièle N, Suel L, Marchand S, Aubert S, Bourg N, Roudaut C, Duguez S, Bartoli M, Richard I | title = A new pathway encompassing calpain 3 and its newly identified substrate cardiac ankyrin repeat protein is involved in the regulation of the nuclear factor-κB pathway in skeletal muscle | journal = The FEBS Journal | volume = 277 | issue = 20 | pages = 4322–37 | date = Oct 2010 | pmid = 20860623 | doi = 10.1111/j.1742-4658.2010.07820.x | s2cid = 21285950 | doi-access = free }} CARP has been localized to nuclei and Z-discs in animal and human muscle cells, and at intercalated discs in human cardiac muscle cells. {{cite journal | vauthors = Jasnic-Savovic J, Nestorovic A, Savic S, Karasek S, Vitulo N, Valle G, Faulkner G, Radojkovic D, Kojic S | title = Profiling of skeletal muscle Ankrd2 protein in human cardiac tissue and neonatal rat cardiomyocytes | journal = Histochemistry and Cell Biology | volume = 143 | issue = 6 | pages = 583–97 | date = Jun 2015 | pmid = 25585647 | doi = 10.1007/s00418-015-1307-5 | s2cid = 5174178 }}

CARP was originally identified as a YB-1-associating, cardiac-restricted transcription co-repressor in the homeobox NKX2-5 pathway that is involved in cardiac ventricular chamber specification, maturation and morphogenesis,{{cite journal | vauthors = Zou Y, Evans S, Chen J, Kuo HC, Harvey RP, Chien KR | title = CARP, a cardiac ankyrin repeat protein, is downstream in the Nkx2-5 homeobox gene pathway | journal = Development | volume = 124 | issue = 4 | pages = 793–804 | date = Feb 1997 | doi = 10.1242/dev.124.4.793 | pmid = 9043061 }}{{cite journal | vauthors = Kuo H, Chen J, Ruiz-Lozano P, Zou Y, Nemer M, Chien KR | title = Control of segmental expression of the cardiac-restricted ankyrin repeat protein gene by distinct regulatory pathways in murine cardiogenesis | journal = Development | volume = 126 | issue = 19 | pages = 4223–34 | date = Oct 1999 | doi = 10.1242/dev.126.19.4223 | pmid = 10477291 }}{{cite journal | vauthors = Takimoto E, Mizuno T, Terasaki F, Shimoyama M, Honda H, Shiojima I, Hiroi Y, Oka T, Hayashi D, Hirai H, Kudoh S, Toko H, Kawamura K, Nagai R, Yazaki Y, Komuro I | title = Up-regulation of natriuretic peptides in the ventricle of Csx/Nkx2-5 transgenic mice | journal = Biochemical and Biophysical Research Communications | volume = 270 | issue = 3 | pages = 1074–9 | date = Apr 2000 | pmid = 10772952 | doi = 10.1006/bbrc.2000.2561 }} and whose mRNA levels are exquisitely sensitive to Doxorubicin, mediated through a hydrogen peroxide/ERK/p38MAP kinase-dependent{{cite journal | vauthors = Jeyaseelan R, Poizat C, Baker RK, Abdishoo S, Isterabadi LB, Lyons GE, Kedes L | title = A novel cardiac-restricted target for doxorubicin. CARP, a nuclear modulator of gene expression in cardiac progenitor cells and cardiomyocytes | journal = The Journal of Biological Chemistry | volume = 272 | issue = 36 | pages = 22800–8 | date = Sep 1997 | pmid = 9278441 | doi=10.1074/jbc.272.36.22800| doi-access = free }}{{cite journal | vauthors = Aihara Y, Kurabayashi M, Tanaka T, Takeda SI, Tomaru K, Sekiguchi KI, Ohyama Y, Nagai R | title = Doxorubicin represses CARP gene transcription through the generation of oxidative stress in neonatal rat cardiac myocytes: possible role of serine/threonine kinase-dependent pathways | journal = Journal of Molecular and Cellular Cardiology | volume = 32 | issue = 8 | pages = 1401–14 | date = Aug 2000 | pmid = 10900167 | doi = 10.1006/jmcc.2000.1173 }} as well as M-CAT cis-element-dependent{{cite journal | vauthors = Aihara Y, Kurabayashi M, Saito Y, Ohyama Y, Tanaka T, Takeda S, Tomaru K, Sekiguchi K, Arai M, Nakamura T, Nagai R | title = Cardiac ankyrin repeat protein is a novel marker of cardiac hypertrophy: role of M-CAT element within the promoter | journal = Hypertension | volume = 36 | issue = 1 | pages = 48–53 | date = Jul 2000 | pmid = 10904011 | doi=10.1161/01.hyp.36.1.48| doi-access = free }} mechanism. Subsequent studies showed that CARP expression in cardiomyocytes is regulated by alpha-adrenergic signaling, in part via the transcription factor GATA4.{{cite journal | vauthors = Maeda T, Sepulveda J, Chen HH, Stewart AF | title = Alpha(1)-adrenergic activation of the cardiac ankyrin repeat protein gene in cardiac myocytes | journal = Gene | volume = 297 | issue = 1–2 | pages = 1–9 | date = Sep 2002 | pmid = 12384280 | doi=10.1016/s0378-1119(02)00924-1}}{{cite journal | vauthors = Zhong L, Chiusa M, Cadar AG, Lin A, Samaras S, Davidson JM, Lim CC | title = Targeted inhibition of ANKRD1 disrupts sarcomeric ERK-GATA4 signal transduction and abrogates phenylephrine-induced cardiomyocyte hypertrophy | journal = Cardiovascular Research | volume = 106 | issue = 2 | pages = 261–71 | date = May 2015 | pmid = 25770146 | doi = 10.1093/cvr/cvv108 | pmc=4481572}} An additional study showed that beta-adrenergic signaling via protein kinase A and CaM kinase induces the expression of CARP, and that CARP may have a negative effect on contractile function.{{cite journal | vauthors = Zolk O, Marx M, Jäckel E, El-Armouche A, Eschenhagen T | title = Beta-adrenergic stimulation induces cardiac ankyrin repeat protein expression: involvement of protein kinase A and calmodulin-dependent kinase | journal = Cardiovascular Research | volume = 59 | issue = 3 | pages = 563–72 | date = Sep 2003 | pmid = 14499857 | doi=10.1016/s0008-6363(03)00476-0| doi-access = }} CARP has also been identified as a transcriptional co-activator of tumor suppressor protein p53 for stimulating gene expression in muscle; p53 was found to be an upstream effector of CARP via upregulation of the proximal ANKRD1 promoter.{{cite journal | vauthors = Kojic S, Nestorovic A, Rakicevic L, Belgrano A, Stankovic M, Divac A, Faulkner G | title = A novel role for cardiac ankyrin repeat protein Ankrd1/CARP as a co-activator of the p53 tumor suppressor protein | journal = Archives of Biochemistry and Biophysics | volume = 502 | issue = 1 | pages = 60–7 | date = Oct 2010 | pmid = 20599664 | doi = 10.1016/j.abb.2010.06.029 }} CARP has a relatively short half-life being longer in cardiomyocytes than endothelial cells; and CARP is degraded by the 26S proteasome via a PEST degron.{{cite journal | vauthors = Samaras SE, Chen B, Koch SR, Sawyer DB, Lim CC, Davidson JM | title = 26S proteasome regulation of Ankrd1/CARP in adult rat ventricular myocytes and human microvascular endothelial cells | journal = Biochemical and Biophysical Research Communications | volume = 425 | issue = 4 | pages = 830–5 | date = Sep 2012 | pmid = 22892129 | doi = 10.1016/j.bbrc.2012.07.162 | pmc=3460693}}{{cite journal | vauthors = Badi I, Cinquetti R, Frascoli M, Parolini C, Chiesa G, Taramelli R, Acquati F | title = Intracellular ANKRD1 protein levels are regulated by 26S proteasome-mediated degradation | journal = FEBS Letters | volume = 583 | issue = 15 | pages = 2486–92 | date = Aug 2009 | pmid = 19589340 | doi = 10.1016/j.febslet.2009.07.001 | s2cid = 2634819 | doi-access = | bibcode = 2009FEBSL.583.2486B }}

In animal models of disease and injury, CARP has been characterized to be a stress-inducible myofibrillar protein. CARP has been shown to play a role in skeletal muscle structure{{cite journal | vauthors = Barash IA, Bang ML, Mathew L, Greaser ML, Chen J, Lieber RL | s2cid = 29659381 | title = Structural and regulatory roles of muscle ankyrin repeat protein family in skeletal muscle | journal = American Journal of Physiology. Cell Physiology | volume = 293 | issue = 1 | pages = C218–27 | date = Jul 2007 | pmid = 17392382 | doi = 10.1152/ajpcell.00055.2007 }} remodeling,{{cite journal | vauthors = Laure L, Suel L, Roudaut C, Bourg N, Ouali A, Bartoli M, Richard I, Danièle N | title = Cardiac ankyrin repeat protein is a marker of skeletal muscle pathological remodelling | journal = The FEBS Journal | volume = 276 | issue = 3 | pages = 669–84 | date = Feb 2009 | pmid = 19143834 | doi = 10.1111/j.1742-4658.2008.06814.x | s2cid = 24104656 | doi-access = free }} and repair, being expressed in skeletal muscle near myotendinous junctions,{{cite journal | vauthors = Baumeister A, Arber S, Caroni P | title = Accumulation of muscle ankyrin repeat protein transcript reveals local activation of primary myotube endcompartments during muscle morphogenesis | journal = The Journal of Cell Biology | volume = 139 | issue = 5 | pages = 1231–42 | date = Dec 1997 | pmid = 9382869 | doi=10.1083/jcb.139.5.1231 | pmc=2140219}} and in vascular smooth muscle cells, as a downstream target of TGF-beta/Smad sigmaling in response to balloon injury{{cite journal | vauthors = Kanai H, Tanaka T, Aihara Y, Takeda S, Kawabata M, Miyazono K, Nagai R, Kurabayashi M | title = Transforming growth factor-beta/Smads signaling induces transcription of the cell type-restricted ankyrin repeat protein CARP gene through CAGA motif in vascular smooth muscle cells | journal = Circulation Research | volume = 88 | issue = 1 | pages = 30–6 | date = Jan 2001 | pmid = 11139470 | doi=10.1161/01.res.88.1.30| doi-access = free }} and atherosclerotic plaques.{{cite journal | vauthors = de Waard V, van Achterberg TA, Beauchamp NJ, Pannekoek H, de Vries CJ | title = Cardiac ankyrin repeat protein (CARP) expression in human and murine atherosclerotic lesions: activin induces CARP in smooth muscle cells | journal = Arteriosclerosis, Thrombosis, and Vascular Biology | volume = 23 | issue = 1 | pages = 64–8 | date = Jan 2003 | pmid = 12524226 | doi=10.1161/01.atv.0000042218.13101.50| doi-access = free }} Further studies have identified a role for CARP in initiation and regulation of arteriogenesis.{{cite journal | vauthors = Boengler K, Pipp F, Fernandez B, Ziegelhoeffer T, Schaper W, Deindl E | title = Arteriogenesis is associated with an induction of the cardiac ankyrin repeat protein (carp) | journal = Cardiovascular Research | volume = 59 | issue = 3 | pages = 573–81 | date = Sep 2003 | pmid = 14499858 | doi=10.1016/s0008-6363(03)00511-x| doi-access = free }}{{cite journal | vauthors = Shi Y, Reitmaier B, Regenbogen J, Slowey RM, Opalenik SR, Wolf E, Goppelt A, Davidson JM | title = CARP, a cardiac ankyrin repeat protein, is up-regulated during wound healing and induces angiogenesis in experimental granulation tissue | journal = The American Journal of Pathology | volume = 166 | issue = 1 | pages = 303–12 | date = Jan 2005 | pmid = 15632022 | doi = 10.1016/S0002-9440(10)62254-7 | pmc=1602297}}{{cite journal | vauthors = Samaras SE, Shi Y, Davidson JM | title = CARP: fishing for novel mechanisms of neovascularization | journal = The Journal of Investigative Dermatology. Symposium Proceedings | volume = 11 | issue = 1 | pages = 124–31 | date = Sep 2006 | pmid = 17069020 | doi=10.1038/sj.jidsymp.5650014| doi-access = free }} Decreased expression of CARP in cardiac cells within the ischemic region was detected in a rat model of ischemic injury, and was thought to be linked to the induction of GADD153, an apoptosis-related gene.{{cite journal | vauthors = Lee MJ, Kwak YK, You KR, Lee BH, Kim DG | title = Involvement of GADD153 and cardiac ankyrin repeat protein in cardiac ischemia-reperfusion injury | journal = Experimental & Molecular Medicine | volume = 41 | issue = 4 | pages = 243–52 | date = Apr 2009 | pmid = 19299913 | doi = 10.3858/emm.2009.41.4.027 | pmc=2679233}} In cardiomyocytes treated with doxorubicin, a model of anthracycline-induced cardiomyopathy, CARP mRNA and protein levels were depleted, myofilament gene transcription was attenuated and sarcomeres showed significant disarray.{{cite journal | vauthors = Chen B, Zhong L, Roush SF, Pentassuglia L, Peng X, Samaras S, Davidson JM, Sawyer DB, Lim CC | title = Disruption of a GATA4/Ankrd1 signaling axis in cardiomyocytes leads to sarcomere disarray: implications for anthracycline cardiomyopathy | journal = PLOS ONE | volume = 7 | issue = 4 | pages = e35743 | date = 2012 | pmid = 22532871 | doi = 10.1371/journal.pone.0035743 | pmc=3332030| bibcode = 2012PLoSO...735743C | doi-access = free }}

In a transgenic mouse model of cardiac-specific overexpression of CARP, mice exhibited normal physiology at baseline, but were protected against pathological cardiac hypertrophy induced via pressure-overload or isoproterenol, which could be attributed to the downregulation of the ERK1/2, MEK and TGFbeta-1 pathways.{{cite journal | vauthors = Song Y, Xu J, Li Y, Jia C, Ma X, Zhang L, Xie X, Zhang Y, Gao X, Zhang Y, Zhu D | title = Cardiac ankyrin repeat protein attenuates cardiac hypertrophy by inhibition of ERK1/2 and TGF-β signaling pathways | journal = PLOS ONE | volume = 7 | issue = 12 | pages = e50436 | date = 2012 | pmid = 23227174 | doi = 10.1371/journal.pone.0050436 | pmc=3515619| bibcode = 2012PLoSO...750436S | doi-access = free }} Another study demonstrated that adenoviral overexpression of CARP in cardiomyocytes enhances cardiac hypertrophy induced by Angiotensin II or pressure-overload{{cite journal | vauthors = Chen C, Shen L, Cao S, Li X, Xuan W, Zhang J, Huang X, Bin J, Xu D, Li G, Kitakaze M, Liao Y | title = Cytosolic CARP promotes angiotensin II- or pressure overload-induced cardiomyocyte hypertrophy through calcineurin accumulation | journal = PLOS ONE | volume = 9 | issue = 8 | pages = e104040 | date = 2014 | pmid = 25089522 | doi = 10.1371/journal.pone.0104040 | pmc=4121294| bibcode = 2014PLoSO...9j4040C | doi-access = free }} and promotes cardiomyocyte apoptosis via p53 activation and mitochondrial dysfunction.{{cite journal | vauthors = Shen L, Chen C, Wei X, Li X, Luo G, Zhang J, Bin J, Huang X, Cao S, Li G, Liao Y | title = Overexpression of ankyrin repeat domain 1 enhances cardiomyocyte apoptosis by promoting p53 activation and mitochondrial dysfunction in rodents | journal = Clinical Science | volume = 128 | issue = 10 | pages = 665–78 | date = May 2015 | pmid = 25511237 | doi = 10.1042/CS20140586 }} However, transgenic knockout models of either CARP alone or CARP in combination with the other muscle ankyrin repeat proteins (MARPs), ANKRD2 and ANKRD23 demonstrated a lack of cardiac phenotype; mice displayed normal cardiac function at baseline and in response to pressure overload-induced cardiac hypertrophy, suggesting that these proteins are not essential.{{cite journal | vauthors = Bang ML, Gu Y, Dalton ND, Peterson KL, Chien KR, Chen J | title = The muscle ankyrin repeat proteins CARP, Ankrd2, and DARP are not essential for normal cardiac development and function at basal conditions and in response to pressure overload | journal = PLOS ONE | volume = 9 | issue = 4 | pages = e93638 | date = 2014 | pmid = 24736439 | doi = 10.1371/journal.pone.0093638 | pmc=3988038| bibcode = 2014PLoSO...993638B | doi-access = free }}

Interactions between CARP and the sarcomeric proteins myopalladin and titin suggest that it may also be involved in the myofibrillar stretch-sensor system. Passive stretch in fetal cardiomyocytes induced differential CARP distribution at nuclei and I-band titin N2A regions.{{cite journal | vauthors = Miller MK, Bang ML, Witt CC, Labeit D, Trombitas C, Watanabe K, Granzier H, McElhinny AS, Gregorio CC, Labeit S | title = The muscle ankyrin repeat proteins: CARP, ankrd2/Arpp and DARP as a family of titin filament-based stress response molecules | journal = Journal of Molecular Biology | volume = 333 | issue = 5 | pages = 951–64 | date = Nov 2003 | pmid = 14583192 | doi=10.1016/j.jmb.2003.09.012}} In a mouse model of muscular dystrophy with myositis (mdm) caused by a small deletion in titin, CARP mRNA expression was shown to be 30-fold elevated in skeletal muscle tissue.{{cite journal | vauthors = Witt CC, Ono Y, Puschmann E, McNabb M, Wu Y, Gotthardt M, Witt SH, Haak M, Labeit D, Gregorio CC, Sorimachi H, Granzier H, Labeit S | title = Induction and myofibrillar targeting of CARP, and suppression of the Nkx2.5 pathway in the MDM mouse with impaired titin-based signaling | journal = Journal of Molecular Biology | volume = 336 | issue = 1 | pages = 145–54 | date = Feb 2004 | pmid = 14741210 | doi=10.1016/j.jmb.2003.12.021}}

A wide spectrum of clinical features have been associated with ANKRD1/CARP. Mutations in ANKRD1 have been associated with dilated cardiomyopathy, two of which result in altered binding with TLN1 and FHL2.{{cite journal | vauthors = Moulik M, Vatta M, Witt SH, Arola AM, Murphy RT, McKenna WJ, Boriek AM, Oka K, Labeit S, Bowles NE, Arimura T, Kimura A, Towbin JA | title = ANKRD1, the gene encoding cardiac ankyrin repeat protein, is a novel dilated cardiomyopathy gene | journal = Journal of the American College of Cardiology | volume = 54 | issue = 4 | pages = 325–33 | date = Jul 2009 | pmid = 19608030 | doi = 10.1016/j.jacc.2009.02.076 | pmc=2915893}}{{cite journal | vauthors = Duboscq-Bidot L, Charron P, Ruppert V, Fauchier L, Richter A, Tavazzi L, Arbustini E, Wichter T, Maisch B, Komajda M, Isnard R, Villard E | title = Mutations in the ANKRD1 gene encoding CARP are responsible for human dilated cardiomyopathy | journal = European Heart Journal | volume = 30 | issue = 17 | pages = 2128–36 | date = Sep 2009 | pmid = 19525294 | doi = 10.1093/eurheartj/ehp225 | doi-access = free }} Mutations in ANKRD1 have also been associated with hypertrophic cardiomyopathy, and have shown to increase binding of CARP to Titin and MYPN.{{cite journal | vauthors = Arimura T, Bos JM, Sato A, Kubo T, Okamoto H, Nishi H, Harada H, Koga Y, Moulik M, Doi YL, Towbin JA, Ackerman MJ, Kimura A | title = Cardiac ankyrin repeat protein gene (ANKRD1) mutations in hypertrophic cardiomyopathy | journal = Journal of the American College of Cardiology | volume = 54 | issue = 4 | pages = 334–42 | date = Jul 2009 | pmid = 19608031 | doi = 10.1016/j.jacc.2008.12.082 | doi-access = | s2cid = 39348417 }} Examination of the functional effects of CARP hypertrophic cardiomyopathy mutations in engineered heart tissue demonstrated that Thr123Met was a gain-of-function mutation exhibiting augmented contractile properties; whereas Pro52Ala and Ile280Val were unstable and failed to incorporate into sarcomeres, an effect that was remedied upon proteasome inhibition via epoxomicin.{{cite journal | vauthors = Crocini C, Arimura T, Reischmann S, Eder A, Braren I, Hansen A, Eschenhagen T, Kimura A, Carrier L | title = Impact of ANKRD1 mutations associated with hypertrophic cardiomyopathy on contraction parameters of engineered heart tissue | journal = Basic Research in Cardiology | volume = 108 | issue = 3 | pages = 349 | date = May 2013 | pmid = 23572067 | doi = 10.1007/s00395-013-0349-x | s2cid = 986109 }}

A missense mutation in ANKRD1 was shown to be associated with the congenital heart defect, Anomalous pulmonary venous connection.{{cite journal | vauthors = Cinquetti R, Badi I, Campione M, Bortoletto E, Chiesa G, Parolini C, Camesasca C, Russo A, Taramelli R, Acquati F | title = Transcriptional deregulation and a missense mutation define ANKRD1 as a candidate gene for total anomalous pulmonary venous return | journal = Human Mutation | volume = 29 | issue = 4 | pages = 468–74 | date = Apr 2008 | pmid = 18273862 | doi = 10.1002/humu.20711 | s2cid = 26121041 }} CARP has been found as a sensitive and specific biomarker for the differential diagnosis of rhabdomyosarcoma.{{cite journal | vauthors = Ishiguro N, Motoi T, Araki N, Ito H, Moriyama M, Yoshida H | title = Expression of cardiac ankyrin repeat protein, CARP, in malignant tumors: diagnostic use of CARP protein immunostaining in rhabdomyosarcoma | journal = Human Pathology | volume = 39 | issue = 11 | pages = 1673–9 | date = Nov 2008 | pmid = 18656235 | doi = 10.1016/j.humpath.2008.04.009 }} ANKRD1 mRNA levels correlate with patient platinum sensitivity, thus ANKRD1 associates with platinum-based chemotherapy treatment outcome in ovarian adenocarcinoma patients.{{cite journal | vauthors = Scurr LL, Guminski AD, Chiew YE, Balleine RL, Sharma R, Lei Y, Pryor K, Wain GV, Brand A, Byth K, Kennedy C, Rizos H, Harnett PR, deFazio A | title = Ankyrin repeat domain 1, ANKRD1, a novel determinant of cisplatin sensitivity expressed in ovarian cancer | journal = Clinical Cancer Research | volume = 14 | issue = 21 | pages = 6924–32 | date = Nov 2008 | pmid = 18980987 | doi = 10.1158/1078-0432.CCR-07-5189 | doi-access = free }}

CARP and mRNA expression has been shown to be upregulated in left ventricles of heart failure patients.{{cite journal | vauthors = Bogomolovas J, Brohm K, Čelutkienė J, Balčiūnaitė G, Bironaitė D, Bukelskienė V, Daunoravičus D, Witt CC, Fielitz J, Grabauskienė V, Labeit S | title = Induction of ankrd1 in dilated cardiomyopathy correlates with the heart failure progression | journal = BioMed Research International | volume = 2015 | pages = 273936 | date = 2015 | pmid = 25961010 | doi = 10.1155/2015/273936 | pmc=4415747| doi-access = free }}{{cite journal | vauthors = Wei YJ, Cui CJ, Huang YX, Zhang XL, Zhang H, Hu SS | title = Upregulated expression of cardiac ankyrin repeat protein in human failing hearts due to arrhythmogenic right ventricular cardiomyopathy | journal = European Journal of Heart Failure | volume = 11 | issue = 6 | pages = 559–66 | date = Jun 2009 | pmid = 19359327 | doi = 10.1093/eurjhf/hfp049 | s2cid = 653256 | doi-access = free }}{{cite journal | vauthors = Nagueh SF, Shah G, Wu Y, Torre-Amione G, King NM, Lahmers S, Witt CC, Becker K, Labeit S, Granzier HL | title = Altered titin expression, myocardial stiffness, and left ventricular function in patients with dilated cardiomyopathy | journal = Circulation | volume = 110 | issue = 2 | pages = 155–62 | date = Jul 2004 | pmid = 15238456 | doi = 10.1161/01.CIR.0000135591.37759.AF | doi-access = free }}{{cite journal | vauthors = Zolk O, Frohme M, Maurer A, Kluxen FW, Hentsch B, Zubakov D, Hoheisel JD, Zucker IH, Pepe S, Eschenhagen T | title = Cardiac ankyrin repeat protein, a negative regulator of cardiac gene expression, is augmented in human heart failure | journal = Biochemical and Biophysical Research Communications | volume = 293 | issue = 5 | pages = 1377–82 | date = May 2002 | pmid = 12054667 | doi = 10.1016/S0006-291X(02)00387-X }} Studies in patients with amyotrophic lateral sclerosis,{{cite journal | vauthors = Nakamura K, Nakada C, Takeuchi K, Osaki M, Shomori K, Kato S, Ohama E, Sato K, Fukayama M, Mori S, Ito H, Moriyama M | title = Altered expression of cardiac ankyrin repeat protein and its homologue, ankyrin repeat protein with PEST and proline-rich region, in atrophic muscles in amyotrophic lateral sclerosis | journal = Pathobiology | volume = 70 | issue = 4 | pages = 197–203 | date = Apr 2003 | pmid = 12679596 | doi = 10.1159/000069329| s2cid = 37199318 }} spinal muscular atrophy, and congenital myopathy,{{cite journal | vauthors = Nakada C, Oka A, Nonaka I, Sato K, Mori S, Ito H, Moriyama M | title = Cardiac ankyrin repeat protein is preferentially induced in atrophic myofibers of congenital myopathy and spinal muscular atrophy | journal = Pathology International | volume = 53 | issue = 10 | pages = 653–8 | date = Oct 2003 | pmid = 14516314 | doi=10.1046/j.1440-1827.2003.01541.x| s2cid = 23238020 }} also found altered expression of CARP in skeletal muscle fibers. Another study in congenital muscular dystrophy and Duchenne muscular dystrophy patients showed elevated expression of CARP.{{cite journal | vauthors = Nakada C, Tsukamoto Y, Oka A, Nonaka I, Takeda S, Sato K, Mori S, Ito H, Moriyama M | title = Cardiac-restricted ankyrin-repeated protein is differentially induced in duchenne and congenital muscular dystrophy | journal = Laboratory Investigation | volume = 83 | issue = 5 | pages = 711–9 | date = May 2003 | pmid = 12746480 | doi=10.1097/01.lab.0000067484.35298.1a| doi-access = free }} CARP expression is also elevated in patients with lupus nephritis, and associates with proteinuria severity, suggesting that it may have biomarker potential.{{cite journal | vauthors = Matsuura K, Uesugi N, Hijiya N, Uchida T, Moriyama M | title = Upregulated expression of cardiac ankyrin-repeated protein in renal podocytes is associated with proteinuria severity in lupus nephritis | journal = Human Pathology | volume = 38 | issue = 3 | pages = 410–9 | date = Mar 2007 | pmid = 17239933 | doi = 10.1016/j.humpath.2006.09.006 }}

ANKRD1 has been shown to interact with:

{{div col|colwidth=20em}}

• Titin,{{cite journal | vauthors = Miller MK, Bang ML, Witt CC, Labeit D, Trombitas C, Watanabe K, Granzier H, McElhinny AS, Gregorio CC, Labeit S | title = The muscle ankyrin repeat proteins: CARP, ankrd2/Arpp and DARP as a family of titin filament-based stress response molecules | journal = J. Mol. Biol. | volume = 333 | issue = 5 | pages = 951–64 | date = November 2003 | pmid = 14583192 | doi = 10.1016/j.jmb.2003.09.012 }}
• MYPN,{{cite journal | vauthors = Bang ML, Mudry RE, McElhinny AS, Trombitás K, Geach AJ, Yamasaki R, Sorimachi H, Granzier H, Gregorio CC, Labeit S | title = Myopalladin, a novel 145-kilodalton sarcomeric protein with multiple roles in Z-disc and I-band protein assemblies | journal = J. Cell Biol. | volume = 153 | issue = 2 | pages = 413–27 | date = April 2001 | pmid = 11309420 | pmc = 2169455 | doi = 10.1083/jcb.153.2.413 }}
• YBX1,
• CASQ2,{{cite journal | vauthors = Torrado M, Nespereira B, López E, Centeno A, Castro-Beiras A, Mikhailov AT | title = ANKRD1 specifically binds CASQ2 in heart extracts and both proteins are co-enriched in piglet cardiac Purkinje cells | journal = Journal of Molecular and Cellular Cardiology | volume = 38 | issue = 2 | pages = 353–65 | date = Feb 2005 | pmid = 15698842 | doi = 10.1016/j.yjmcc.2004.11.034 }}
• DES,
• TP53,
• TLN1, and
• FHL2.

{{Div col end}}

{{Reflist|33em}}

• {{UCSC gene info|ANKRD1}}

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• {{cite journal | vauthors = Bang ML, Mudry RE, McElhinny AS, Trombitás K, Geach AJ, Yamasaki R, Sorimachi H, Granzier H, Gregorio CC, Labeit S | title = Myopalladin, a novel 145-kilodalton sarcomeric protein with multiple roles in Z-disc and I-band protein assemblies | journal = J. Cell Biol. | volume = 153 | issue = 2 | pages = 413–27 | year = 2001 | pmid = 11309420 | pmc = 2169455 | doi = 10.1083/jcb.153.2.413 }}
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Category:Human proteins