FB2025_01 , released February 20, 2025
Human Disease Model Report: cardiomyopathy, TNNI3-related
Open Close
General Information
Name
cardiomyopathy, TNNI3-related
FlyBase ID
FBhh0000420
Disease Ontology Term
Parent Disease
OMIM
Overview

This report describes fly models relevant to cardiomyopathies that are TNNI3-related. The human gene implicated in these diseases (TNNI3) encodes cardiac-type troponin I, a component of sarcomere thin filaments. TNNI3 is implicated in several forms of heart disease (see MIM:191044), including CMD1FF (FBhh0000166), CMD2A (FBhh0000165), CMH7 (FBhh0000415), and familial restrictive cardiomyopathy 1 (MIM:115210). Involvement of TNNI3 with hypertrophic cardiomyopathy is strongly supported by a large-scale WES analysis (Walsh, et al., 2016; pubmed:27532257).

A UAS construct of a tagged wild-type human Hsap\TNNI3 gene has been introduced into flies and has been made available; it has not been characterized.

There is one fly ortholog of TNNI3, wupA; Dmel\wupA is also orthologous to human genes TNNI1 and TNNI2, which are described as skeletal-type troponins. Multiple genetic reagents have been been generated for the wupA gene including classical loss-of-function alleles, RNAi targeting constructs, and alleles caused by insertional mutagenesis. Homozygous loss-of-function alleles are lethal in the embryonic stage. A well-characterized missense mutation that survives to adulthood exhibits multiple defects in heart function, indirect flight muscle hypercontraction, and other muscle defects. Genetic and physical interactions of Dmel\wupA have been described; see below and the wupA gene report.

[updated Apr. 2018 by FlyBase; FBrf0222196]

Disease Summary Information
Disease Summary: cardiomyopathy, TNNI3-related
OMIM report
Human gene(s) implicated
Symptoms and phenotype
Genetics
Cellular phenotype and pathology
Molecular information

The troponin complex is located on the thin filament of striated muscle and is composed of 3 component polypeptides: troponin I (TNNI1, MIM:191042; TNNI2, MIM:191043; and TNNI3, OMIM), troponin T (TNNT1, MIM:191041; and TNNT2, MIM:191045), and troponin C (TNNC1, MIM:191040; and TNNC2 MIM:191039). [From MIM:191044; 2016.02.02]

External links
Disease synonyms
Ortholog Information
Human gene(s) in FlyBase
Human gene (HGNC)
D. melanogaster ortholog (based on DIOPT)
Comments on ortholog(s)

Many to one: 3 human to 1 Drosophila; additional human orthologs are TNNI1 and TNNI2. TNNI3 is described as cardiac-type I troponin; TNNI1 and TNNI2 are described as skeletal-type I troponins.

Other mammalian ortholog(s) used
    D. melanogaster Gene Information (1)
    Gene Snapshot
    wings up A (wupA) encodes a cytoskeletal protein of the troponin complex of the muscle thin filament. It is involved in calcium-dependent regulation of muscle contraction, and in development of the embryonic heart, skeletal muscle and flight muscle It also contributes to non-muscle functions such as apico-basal polarity formation, nuclear division and maintenance of nuclear integrity. [Date last reviewed: 2019-03-21]
    Molecular function (GO)
    Gene Groups / Pathways
    Comments on ortholog(s)

    Ortholog of human TNNI1, TNNI2, and TNNI3 (1 Drosophila to 3 human). Dmel\wupA shares 31-34% identity and 50-55% similarity with the human genes.

    Orthologs and Alignments from DRSC
    DIOPT - DRSC Integrative Ortholog Prediction Tool - Click the link below to search for orthologs in Humans
    Other Genes Used: Viral, Bacterial, Synthetic (0)
      Summary of Physical Interactions (45 groups)
      protein-protein
      Interacting group
      Assay
      References
      experimental knowledge based
      experimental knowledge based
      experimental knowledge based
      experimental knowledge based
      anti bait coimmunoprecipitation, western blot
      experimental knowledge based
      experimental knowledge based
      experimental knowledge based
      experimental knowledge based
      experimental knowledge based
      anti bait coimmunoprecipitation, western blot
      experimental knowledge based
      experimental knowledge based
      experimental knowledge based
      experimental knowledge based
      experimental knowledge based
      anti bait coimmunoprecipitation, western blot
      experimental knowledge based
      experimental knowledge based
      experimental knowledge based
      experimental knowledge based
      experimental knowledge based
      anti tag coimmunoprecipitation, peptide massfingerprinting
      experimental knowledge based
      experimental knowledge based
      experimental knowledge based
      experimental knowledge based
      experimental knowledge based
      experimental knowledge based
      experimental knowledge based
      experimental knowledge based
      experimental knowledge based
      anti tag coimmunoprecipitation, western blot
      anti tag coimmunoprecipitation, Identification by mass spectrometry
      experimental knowledge based
      experimental knowledge based
      anti bait coimmunoprecipitation, western blot
      experimental knowledge based
      experimental knowledge based
      experimental knowledge based
      experimental knowledge based
      experimental knowledge based
      RNA-protein
      Interacting group
      Assay
      References
      anti tag coimmunoprecipitation, quantitative reverse transcription pcr
      electrophoretic mobility shift assay, autoradiography
      Alleles Reported to Model Human Disease (Disease Ontology) (3 alleles)
      Models Based on Experimental Evidence ( 3 )
      Modifiers Based on Experimental Evidence ( 2 )
      Allele
      Disease
      Interaction
      References
      Alleles Representing Disease-Implicated Variants
      Genetic Tools, Stocks and Reagents
      Sources of Stocks
      Contact lab of origin for a reagent not available from a public stock center.
      Bloomington Stock Center Disease Page
      Related mammalian, viral, bacterial, or synthetic transgenes
      Allele
      Transgene
      Publicly Available Stocks
      Selected Drosophila transgenes
      Allele
      Transgene
      Publicly Available Stocks
      RNAi constructs available
      Allele
      Transgene
      Publicly Available Stocks
      Selected Drosophila classical alleles
      Allele
      Allele class
      Mutagen
      Publicly Available Stocks
      loss of function allele
      Delta2-3 transposase
      loss of function allele
      Delta2-3 transposase
      loss of function allele
      X ray
      loss of function allele
      X ray
      loss of function allele
      ethyl methanesulfonate
      loss of function allele
      X ray
      loss of function allele
      X ray
      loss of function allele
      References (19)