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Aliases for TNNI1 Gene

Aliases for TNNI1 Gene

  • Troponin I Type 1 (Skeletal, Slow) 2 3
  • Troponin I, Slow-Twitch Isoform 3 4
  • Troponin I, Slow Skeletal Muscle 3
  • Troponin I, Skeletal, Slow 2
  • SSTNI 3
  • TNN1 3

External Ids for TNNI1 Gene

Summaries for TNNI1 Gene

Entrez Gene Summary for TNNI1 Gene

  • Troponin proteins associate with tropomyosin and regulate the calcium sensitivity of the myofibril contractile apparatus of striated muscles. Troponin I (TnI), along with troponin T (TnT) and troponin C (TnC), is one of 3 subunits that form the troponin complex of the thin filaments of striated muscle. TnI is the inhibitory subunit; blocking actin-myosin interactions and thereby mediating striated muscle relaxation. The TnI subfamily contains three genes: TnI-skeletal-fast-twitch, TnI-skeletal-slow-twitch, and TnI-cardiac. The TnI-fast and TnI-slow genes are expressed in fast-twitch and slow-twitch skeletal muscle fibers, respectively, while the TnI-cardiac gene is expressed exclusively in cardiac muscle tissue. This gene encodes the Troponin-I-skeletal-slow-twitch protein. This gene is expressed in cardiac and skeletal muscle during early development but is restricted to slow-twitch skeletal muscle fibers in adults. The encoded protein prevents muscle contraction by inhibiting calcium-mediated conformational changes in actin-myosin complexes. [provided by RefSeq, Jul 2008]

GeneCards Summary for TNNI1 Gene

TNNI1 (Troponin I Type 1 (Skeletal, Slow)) is a Protein Coding gene. Diseases associated with TNNI1 include atrophy of testis. Among its related pathways are Activation of cAMP-Dependent PKA and Activation of cAMP-Dependent PKA. GO annotations related to this gene include actin binding and tropomyosin binding. An important paralog of this gene is TNNI2.

UniProtKB/Swiss-Prot for TNNI1 Gene

  • Troponin I is the inhibitory subunit of troponin, the thin filament regulatory complex which confers calcium-sensitivity to striated muscle actomyosin ATPase activity

Gene Wiki entry for TNNI1 Gene

No data available for Tocris Summary , PharmGKB "VIP" Summary , fRNAdb sequence ontologies and piRNA Summary for TNNI1 Gene

Genomics for TNNI1 Gene

Genomic Location for TNNI1 Gene

201,403,767 bp from pter
201,429,866 bp from pter
26,100 bases
Minus strand

Genomic View for TNNI1 Gene

UCSC Golden Path with GeneCards custom track
Cytogenetic band:
Genomic Location for TNNI1 Gene
GeneLoc Logo Genomic Neighborhood Exon StructureGene Density

RefSeq DNA sequence for TNNI1 Gene

Regulatory Elements for TNNI1 Gene

Proteins for TNNI1 Gene

  • Protein details for TNNI1 Gene (UniProtKB/Swiss-Prot)

    Protein Symbol:
    Recommended name:
    Troponin I, slow skeletal muscle
    Protein Accession:
    Secondary Accessions:
    • A6NEH3
    • A8MSJ0
    • Q659A5
    • Q6FGS7
    • Q6FGW1
    • Q6ICU2
    • Q86T57
    • Q96DT9

    Protein attributes for TNNI1 Gene

    187 amino acids
    Molecular mass:
    21692 Da
    Quaternary structure:
    • Binds to actin and tropomyosin

neXtProt entry for TNNI1 Gene

Proteomics data for TNNI1 Gene at MOPED

Post-translational modifications for TNNI1 Gene

  • Modification sites at PhosphoSitePlus
  • Modification sites at neXtProt

Other Protein References for TNNI1 Gene

No data available for DME Specific Peptides for TNNI1 Gene

Domains for TNNI1 Gene

Protein Domains for TNNI1 Gene


Suggested Antigen Peptide Sequences for TNNI1 Gene

GenScript: Design optimal peptide antigens:

Graphical View of Domain Structure for InterPro Entry



  • Belongs to the troponin I family.:
    • P19237
genes like me logo Genes that share domains with TNNI1: view

No data available for Gene Families for TNNI1 Gene

Function for TNNI1 Gene

Molecular function for TNNI1 Gene

GENATLAS Biochemistry: troponin I1,inhibitory subunit,component of the troponin complex forming the calcium-sensitive molecular switch that regulates striated muscle contraction in response to modifications in intracellular concentration,slow twitch skeletal muscle,also expressed in cartilage,acting as a potent and specific inhibitor of angiogenesis
UniProtKB/Swiss-Prot Function: Troponin I is the inhibitory subunit of troponin, the thin filament regulatory complex which confers calcium-sensitivity to striated muscle actomyosin ATPase activity

Gene Ontology (GO) - Molecular Function for TNNI1 Gene

GO ID Qualified GO term Evidence PubMed IDs
GO:0003779 actin binding IEA --
GO:0005515 protein binding IPI 25416956
GO:0046872 metal ion binding IEA --
genes like me logo Genes that share ontologies with TNNI1: view

Phenotypes for TNNI1 Gene

GenomeRNAi human phenotypes for TNNI1:
genes like me logo Genes that share phenotypes with TNNI1: view

miRNA for TNNI1 Gene

miRTarBase miRNAs that target TNNI1

No data available for Enzyme Numbers (IUBMB) , Animal Models , Transcription Factor Targeting and HOMER Transcription for TNNI1 Gene

Localization for TNNI1 Gene

Subcellular locations from

Jensen Localization Image for TNNI1 Gene COMPARTMENTS Subcellular localization image for TNNI1 gene
Compartment Confidence
cytoskeleton 5
cytosol 4
nucleus 2
mitochondrion 1

Gene Ontology (GO) - Cellular Components for TNNI1 Gene

GO ID Qualified GO term Evidence PubMed IDs
GO:0005829 cytosol TAS --
GO:0005861 troponin complex IEA --
genes like me logo Genes that share ontologies with TNNI1: view

No data available for Subcellular locations from UniProtKB/Swiss-Prot for TNNI1 Gene

Pathways for TNNI1 Gene

genes like me logo Genes that share pathways with TNNI1: view

Pathways by source for TNNI1 Gene

Gene Ontology (GO) - Biological Process for TNNI1 Gene

GO ID Qualified GO term Evidence PubMed IDs
GO:0006942 regulation of striated muscle contraction NAS 2365354
GO:0030049 muscle filament sliding TAS --
GO:0055010 ventricular cardiac muscle tissue morphogenesis IEA --
genes like me logo Genes that share ontologies with TNNI1: view

Compounds for TNNI1 Gene

(1) HMDB Compounds for TNNI1 Gene

Compound Synonyms Cas Number PubMed IDs
  • Ca
genes like me logo Genes that share compounds with TNNI1: view

Transcripts for TNNI1 Gene

mRNA/cDNA for TNNI1 Gene

Unigene Clusters for TNNI1 Gene

Troponin I type 1 (skeletal, slow):
Representative Sequences:

Alternative Splicing Database (ASD) splice patterns (SP) for TNNI1 Gene

ExUns: 1 ^ 2 ^ 3 ^ 4 ^ 5 ^ 6 ^ 7a · 7b ^ 8a · 8b ^ 9a · 9b · 9c ^ 10a · 10b
SP1: -
SP2: - - - - -
SP4: - -

Relevant External Links for TNNI1 Gene

GeneLoc Exon Structure for
ECgene alternative splicing isoforms for

Expression for TNNI1 Gene

mRNA expression in normal human tissues for TNNI1 Gene

mRNA expression in embryonic tissues and stem cells from LifeMap Discovery

mRNA differential expression in normal tissues according to GTEx for TNNI1 Gene

This gene is overexpressed in Muscle - Skeletal (50.1).

Integrated Proteomics: protein expression from ProteomicsDB, PaxDb, and MOPED for TNNI1 Gene

SOURCE GeneReport for Unigene cluster for TNNI1 Gene Hs.320890

mRNA Expression by UniProt/SwissProt for TNNI1 Gene

Tissue specificity: Highest levels observed in human skeletal muscle (e.g. gastrocnemious muscle), differentiated cultures of primary human muscle cells and rhabdomyosarcoma cells cultured in low serum medium. Expressed in C2 muscle cell myoblasts and myotubes.
genes like me logo Genes that share expressions with TNNI1: view

Orthologs for TNNI1 Gene

This gene was present in the common ancestor of chordates.

Orthologs for TNNI1 Gene

Organism Taxonomy Gene Similarity Type Details
(Pan troglodytes)
Mammalia TNNI1 35
  • 99.29 (n)
  • 100 (a)
TNNI1 36
  • 100 (a)
(Bos Taurus)
Mammalia TNNI1 35
  • 90.73 (n)
  • 97.33 (a)
TNNI1 36
  • 97 (a)
(Canis familiaris)
Mammalia TNNI1 35
  • 92.16 (n)
  • 97.86 (a)
TNNI1 36
  • 98 (a)
(Mus musculus)
Mammalia Tnni1 35
  • 89.66 (n)
  • 97.86 (a)
Tnni1 16
Tnni1 36
  • 98 (a)
(Monodelphis domestica)
Mammalia TNNI1 36
  • 96 (a)
(Rattus norvegicus)
Mammalia Tnni1 35
  • 90.02 (n)
  • 97.33 (a)
(Gallus gallus)
Aves TNNI1 35
  • 80.75 (n)
  • 88.77 (a)
TNNI1 36
  • 77 (a)
(Anolis carolinensis)
Reptilia TNNI1 36
  • 87 (a)
African clawed frog
(Xenopus laevis)
Amphibia LOC397803 35
tropical clawed frog
(Silurana tropicalis)
Amphibia LOC100125108 35
  • 69.88 (n)
  • 80.75 (a)
(Danio rerio)
Actinopterygii tnni1a 36
  • 77 (a)
tnni1b 35
  • 74.73 (n)
  • 79.12 (a)
tnni1b 36
  • 68 (a)
tnni1d 36
  • 60 (a)
tnni1d 36
  • 60 (a)
sea squirt
(Ciona intestinalis)
Ascidiacea Cin.13140 35
sea squirt
(Ciona savignyi)
Ascidiacea CSA.11013 36
  • 44 (a)
Species with no ortholog for TNNI1:
  • A. gosspyii yeast (Ashbya gossypii)
  • Actinobacteria (Mycobacterium tuberculosis)
  • African malaria mosquito (Anopheles gambiae)
  • Alicante grape (Vitis vinifera)
  • alpha proteobacteria (Wolbachia pipientis)
  • amoeba (Dictyostelium discoideum)
  • Archea (Pyrococcus horikoshii)
  • baker's yeast (Saccharomyces cerevisiae)
  • barley (Hordeum vulgare)
  • beta proteobacteria (Neisseria meningitidis)
  • bread mold (Neurospora crassa)
  • Chromalveolata (Phytophthora infestans)
  • common water flea (Daphnia pulex)
  • corn (Zea mays)
  • E. coli (Escherichia coli)
  • filamentous fungi (Aspergillus nidulans)
  • Firmicute bacteria (Streptococcus pneumoniae)
  • fission yeast (Schizosaccharomyces pombe)
  • fruit fly (Drosophila melanogaster)
  • green algae (Chlamydomonas reinhardtii)
  • honey bee (Apis mellifera)
  • K. lactis yeast (Kluyveromyces lactis)
  • loblloly pine (Pinus taeda)
  • malaria parasite (Plasmodium falciparum)
  • medicago trunc (Medicago Truncatula)
  • moss (Physcomitrella patens)
  • orangutan (Pongo pygmaeus)
  • pig (Sus scrofa)
  • platypus (Ornithorhynchus anatinus)
  • rainbow trout (Oncorhynchus mykiss)
  • rice (Oryza sativa)
  • rice blast fungus (Magnaporthe grisea)
  • schistosome parasite (Schistosoma mansoni)
  • sea anemone (Nematostella vectensis)
  • sea urchin (Strongylocentrotus purpuratus)
  • sorghum (Sorghum bicolor)
  • soybean (Glycine max)
  • stem rust fungus (Puccinia graminis)
  • sugarcane (Saccharum officinarum)
  • thale cress (Arabidopsis thaliana)
  • tomato (Lycopersicon esculentum)
  • toxoplasmosis (Toxoplasma gondii)
  • Trichoplax (Trichoplax adhaerens)
  • wheat (Triticum aestivum)
  • worm (Caenorhabditis elegans)

Evolution for TNNI1 Gene

Gene Tree for TNNI1 (if available)
Gene Tree for TNNI1 (if available)

Paralogs for TNNI1 Gene

Paralogs for TNNI1 Gene

Selected SIMAP similar genes for TNNI1 Gene using alignment to 4 proteins:

genes like me logo Genes that share paralogs with TNNI1: view

Variants for TNNI1 Gene

Sequence variations from dbSNP and Humsavar for TNNI1 Gene

SNP ID Clin Chr 01 pos Sequence Context AA Info Type MAF
rs1022972 -- 201,412,475(+) TTCTC(C/T)GCTCT intron-variant
rs1051895 -- 201,409,005(-) GGCTT(C/T)TCAGC utr-variant-3-prime
rs1107256 -- 201,404,716(+) GTGGA(A/G)CAGTT utr-variant-3-prime
rs1138431 -- 201,409,959(-) gcctt(C/T)taggt intron-variant
rs1256941 -- 201,423,636(+) GAACA(A/C)AAGCC upstream-variant-2KB

Structural Variations from Database of Genomic Variants (DGV) for TNNI1 Gene

Variant ID Type Subtype PubMed ID
nsv467961 CNV Gain 19166990
nsv470776 CNV Gain 18288195
nsv832315 CNV Loss 17160897
nsv832326 CNV Loss 17160897
nsv508687 CNV Loss 20534489
nsv4065 CNV Insertion 18451855
nsv522795 CNV Loss 19592680

Relevant External Links for TNNI1 Gene

HapMap Linkage Disequilibrium report

No data available for Polymorphic Variants from UniProtKB/Swiss-Prot for TNNI1 Gene

Disorders for TNNI1 Gene

(1) MalaCards Diseases for TNNI1 Gene

Search for TNNI1 Gene in MalaCards »

(2) University of Copenhagen DISEASES for TNNI1 Gene

Relevant External Links for TNNI1

Genetic Association Database (GAD)
genes like me logo Genes that share disorders with TNNI1: view

No data available for UniProtKB/Swiss-Prot for TNNI1 Gene

Publications for TNNI1 Gene

  1. cDNA sequence, tissue-specific expression, and chromosomal mapping of the human slow-twitch skeletal muscle isoform of troponin I. (PMID: 2365354) Wade R. … Kedes L. (Genomics 1990) 2 3 4
  2. Structure and expression of the human slow twitch skeletal muscle troponin I gene. (PMID: 8144655) Corin S.J. … Wade R. (J. Biol. Chem. 1994) 2 3 4
  3. Troponin I isoform expression in human heart. (PMID: 1934363) Hunkeler N.M. … Murphy A.M. (Circ. Res. 1991) 3 23
  4. hMusTRD1alpha1 represses MEF2 activation of the troponin I slow enhancer. (PMID: 12857748) Polly P. … Hardeman E.C. (J. Biol. Chem. 2003) 3 23
  5. The status, quality, and expansion of the NIH full-length cDNA project: the Mammalian Gene Collection (MGC). (PMID: 15489334) Gerhard D.S. … Malek J. (Genome Res. 2004) 3 4

Products for TNNI1 Gene

Sources for TNNI1 Gene

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