NM_000363.5(TNNI3):c.55A>G (p.Ile19Val) AND Hypertrophic cardiomyopathy

Germline classification:: Uncertain significance (1 submission)
Last evaluated:: Feb 28, 2018
Review status:: 1 star out of maximum of 4 stars
criteria provided, single submitter

Somatic classification of clinical impact:: None
Review status:: (0/4) 0 stars out of maximum of 4 stars
no assertion criteria provided

Somatic classification of oncogenicity:: None
Review status:: (0/4) 0 stars out of maximum of 4 stars
no assertion criteria provided

Record status:: current
Accession:: RCV000694571.2

Allele description [Variation Report for NM_000363.5(TNNI3):c.55A>G (p.Ile19Val)]

NM_000363.5(TNNI3):c.55A>G (p.Ile19Val)

Gene:

TNNI3:troponin I3, cardiac type [Gene - OMIM - HGNC]

Variant type:

single nucleotide variant

Cytogenetic location:

19q13.42

Genomic location:

Preferred name:

NM_000363.5(TNNI3):c.55A>G (p.Ile19Val)

HGVS:

NC_000019.10:g.55157103T>C
NG_007866.2:g.5630A>G
NG_032759.1:g.14620A>G
NM_000363.5:c.55A>GMANE SELECT
NP_000354.4:p.Ile19Val
LRG_432t1:c.55A>G
LRG_432:g.5630A>G
NC_000019.9:g.55668471T>C
NM_000363.4:c.55A>G

Protein change:

I19V

Links:

dbSNP: rs755862334

NCBI 1000 Genomes Browser:

rs755862334

Molecular consequence:

NM_000363.5:c.55A>G - missense variant - [Sequence Ontology: SO:0001583]

Condition(s)

Name:: Hypertrophic cardiomyopathy
Synonyms:: HYPERTROPHIC MYOCARDIOPATHY
Identifiers:: MONDO: MONDO:0005045; MeSH: D002312; MedGen: C0007194; Human Phenotype Ontology: HP:0001639

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Submission Accession	Submitter	Review Status (Assertion method)	Clinical Significance (Last evaluated)	Origin	Method	Citations
SCV000823022	Invitae	criteria provided, single submitter (Invitae Variant Classification Sherloc (09022015))	Uncertain significance (Feb 28, 2018)	germline	clinical testing	PubMed (1) [See all records that cite this PMID]

Submission Accession

Submitter

Review Status
(Assertion method)

Clinical Significance
(Last evaluated)

Origin

Method

Citations

SCV000823022

Invitae

criteria provided, single submitter

(Invitae Variant Classification Sherloc (09022015))

Uncertain significance
(Feb 28, 2018)

germline

clinical testing

PubMed (1)
[See all records that cite this PMID]

Help

Summary from all submissions

Ethnicity	Origin	Affected	Individuals	Families	Chromosomes tested	Number Tested	Family history	Method
not provided	germline	unknown	not provided	not provided	not provided	not provided	not provided	clinical testing

Citations

PubMed

Sherloc: a comprehensive refinement of the ACMG-AMP variant classification criteria.

Nykamp K, Anderson M, Powers M, Garcia J, Herrera B, Ho YY, Kobayashi Y, Patil N, Thusberg J, Westbrook M; Invitae Clinical Genomics Group., Topper S.

Genet Med. 2017 Oct;19(10):1105-1117. doi: 10.1038/gim.2017.37. Epub 2017 May 11. Erratum in: Genet Med. 2020 Jan;22(1):240-242.

PubMed [citation]

PMID:: 28492532
PMCID:: PMC5632818

Details of each submission

From Invitae, SCV000823022.2

#	Ethnicity	Individuals	Chromosomes Tested	Family History	Method	Citations
1	not provided	not provided	not provided	not provided	clinical testing	PubMed (1)

Description

This sequence change replaces isoleucine with valine at codon 19 of the TNNI3 protein (p.Ile19Val). The isoleucine residue is weakly conserved and there is a small physicochemical difference between isoleucine and valine. This variant is present in population databases (rs755862334, ExAC 0.06%). This variant has not been reported in the literature in individuals with TNNI3-related disease. Algorithms developed to predict the effect of missense changes on protein structure and function output the following: SIFT: "Tolerated"; PolyPhen-2: "Benign"; Align-GVGD: "Class C0". The valine amino acid residue is found in multiple mammalian species, suggesting that this missense change does not adversely affect protein function. These predictions have not been confirmed by published functional studies and their clinical significance is uncertain. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance.

#	Sample				Method		Observation
#	Origin	Affected	Number tested	Tissue	Purpose	Method	Individuals	Allele frequency	Families	Co-occurrences
1	germline	unknown	not provided	not provided	not provided		not provided	not provided	not provided	not provided

Last Updated: Feb 7, 2023

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