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Symbol TCAP contributors: mct/pgu - updated : 28-03-2012
HGNC name titin-cap (telethonin)
HGNC id 11610
Corresponding disease
CMD1N cardiomyopathy, dilated 1N
LGMD2G limb girdle muscular dystrophy 2G
Location 17q12      Physical location : 37.821.598 - 37.822.806
Synonym name
  • 19 kDa sarcomeric protein
  • titin-cap protein
  • limb girdle muscular dystrophy 2G (autosomal recessive)
  • Synonym symbol(s) TELE, TELETHONIN, TELT, T-cap, TELE, CMD1N, LGMD2G
    TYPE functioning gene
    STRUCTURE 1.21 kb     2 Exon(s)
    10 Kb 5' upstream gene genomic sequence study
    regulatory sequence Promoter
    Binding site
    text structure
  • highly conserved 421 bp promoter proximal promoter fragment that contains two E boxes and multiple putative Mef2 binding sequences (
  • MAPPING cloned Y linked N status confirmed
    Map cen - D17S2005 - D17S1542 - D17S1867 - D17S1660 - D17S946 - D17S838 - [D17S1818 - D17S1814 ] - THRA - RARA RARA - D17S2038 - qter
    Text [TCAP ]
    Physical map
    LOC388381 17 LOC388381 RPL23 17q12 ribosomal protein L23 LASP1 17q12-q21 LIM and SH3 protein 1 LOC388382 17 hypothetical gene supported by BC009632; BC042124 FLJ43826 17q21.2 FLJ43826 protein PLXDC1 17q21.1 plexin domain containing 1 LOC390790 17 similar to Cg7197-prov protein CACNB1 17q21 calcium channel, voltage-dependent, beta 1 subunit RPL19 17q11 ribosomal protein L19 24b2/STAC2 17q21.2 24b2/STAC2 protein LOC388383 17 similar to upstream binding protein 1 MGC15482 17q21.2 F-box protein FBL2 PPARBP 17q12-q21.1 PPAR binding protein CRK7 17q21.2 CDC2-related protein kinase 7 NEUROD2 17p13.1 neurogenic differentiation 2 PPP1R1B 17q21.2 protein phosphatase 1, regulatory (inhibitor) subunit 1B (dopamine and cAMP regulated phosphoprotein, DARPP-32) STARD3 17q21.1 START domain containing 3 TCAP 17q12-q21.1 titin-cap (telethonin) PNMT 17q21.1 phenylethanolamine N-methyltransferase CAB2 17q21.2 CAB2 protein ERBB2 17q11.2-q12 v-erb-b2 erythroblastic leukemia viral oncogene homolog 2, neuro/glioblastoma derived oncogene homolog (avian) MGC14832 GRB7 17q11.2-q12 growth factor receptor-bound protein 7 ZNFN1A3 17q11.2 zinc finger protein, subfamily 1A, 3 (Aiolos) ZPBP2 17q21.2 zona pellucida binding protein 2 GSDML 17q21.2 gasdermin-like ORMDL3 17q12 ORM1-like 3 (S. cerevisiae) LOC342669 17q21.2 similar to leucine-rich repeat domain-containing protein GSDM 17q21.2 gasdermin PSMD3 17q21.1 proteasome (prosome, macropain) 26S subunit, non-ATPase, 3 CSF3 17q11.2-q12 colony stimulating factor 3 (granulocyte) TRAP100 THRA 17q11.2 thyroid hormone receptor, alpha (erythroblastic leukemia viral (v-erb-a) oncogene homolog, avian) NR1D1 17q11.2 nuclear receptor subfamily 1, group D, member 1 MLN51 17q12-q21.3 nuclear receptor subfamily 1, group D, member 1 LOC339287 17q21.2 hypothetical protein LOC339287 Link-GEFII 17q21.2 Link guanine nucleotide exchange factor II WIRE 17q21.2 WIRE protein CDC6 17q21.3 CDC6 cell division cycle 6 homolog (S. cerevisiae)
    TRANSCRIPTS type messenger
    identificationnb exonstypebpproduct
    ProteinkDaAAspecific expressionYearPubmed
    2 - 963 19 167 - 2002 12379311
    Type widely
       expressed in (based on citations)
    SystemOrgan level 1Organ level 2Organ level 3Organ level 4LevelPubmedSpeciesStageRna symbol
    Cardiovascularheart   highly
    Reproductivemale systemprostate  moderately
    Visualeye   moderately
    SystemTissueTissue level 1Tissue level 2LevelPubmedSpeciesStageRna symbol
    Muscularstriatumcardiac highly
    Muscularstriatumskeletal highly
    cell lineage
    cell lines
    at STAGE
  • N-terminus forming a unique structure linking two titin N-termini at the Z-disc
  • C-terminus that may have a regulatory function
    interspecies homolog to murine Tcap (90.4 pc)
    CATEGORY structural protein
    SUBCELLULAR LOCALIZATION     intracellular
  • localized to the Z-disc of skeletal and cardiac muscles
  • co-localized with SCN5A
  • co-localized in the nucleus with MDM2
  • basic FUNCTION
  • required for the structural integrity of sarcomere
  • muscle assembly regulating factor, mediating the antiparallel assembly of titin (ttn) molecules at the sarcomeric z-disk
  • in skeletal muscle, anchoring TTN in the Z-disk
  • acting as a kinase
  • may play a role in intestinal pseudo-obstruction
  • one of the titin interacting Z-disc proteins involved in the regulation and development of normal sarcomeric structure
  • is a stretch-sensitive Z-disc protein that binds to proteins in the t-tubule membrane
  • is a critical, load-sensitive regulator of t-tubule structure and function
  • plays an important role in the response to cardiac overload
  • might be a load-dependent molecular regulator of the t-tubule membrane in the skeletal muscle
  • involved in the regulation of t-tubule structure, especially after mechanical overload
    a component
  • protein constituent of sarcomere
  • titin/TCAP/MLP complex serving as a mechanical stretch sensor
  • complex between the muscle proteins titin and telethonin forms a highly directed molecular bond
    small molecule
  • binding to N terminal Ig repeats Z1 and Z2 of titin
  • binding to CSRP3 (Z disc MLP/TCAP complex, key component of the cardiomyocytes stretch sensor machinery)
  • interacting with MYOZ1 and MYOZ3
  • interacting with SCN5A
  • binding to BMP10
  • important role for MYOD1 in activating TCAP expression through the promoter proximal E box
  • cell & other
    Other downregulated at the protein level through the proteasomal pathway, by MDM2
    corresponding disease(s) LGMD2G , CMD1N
    related resource Limb-Girdle Muscular Dystrophy pages
    Other morbid association(s)
    TypeGene ModificationChromosome rearrangementProtein expressionProtein Function
    constitutional     --low  
    loss of telethonin mRNA and nuclear accumulation of this protein is associated with heart failure, an effect that may contribute to enhanced rates of apoptosis found in these hearts
  • to hypertrophic cardiomyopathy (HCM)
  • to dilated cardiomyopathy (DCM)
  • Variant & Polymorphism other
  • T137I and R153H, were found in patients with HCM (mutation augment the ability of TCAP to interact with titin and MYOZ2)
  • E132Q, in a patient with DCM (mutation impair the interaction of TCAP with MLP, titin, and MYOZ2)
  • Candidate gene
    Therapy target