VCV001006848.9 - ClinVar

NM_003289.4(TPM2):c.757A>G (p.Ile253Val)

Germline

Classification

criteria provided, multiple submitters, no conflicts. Learn more about how ClinVar calculates review status.

Uncertain significance
Uncertain significance (2)

2 out of 2 submissions contributed to this classification

The aggregate germline classification for this variant, typically for a monogenic or Mendelian disorder as in the ACMG/AMP guidelines, or for response to a drug. This value is calculated by NCBI based on data from submitters. Read our rules for calculating the aggregate classification.

Somatic

No data submitted for somatic clinical impact

Somatic

No data submitted for oncogenicity

Variant Details

Identifiers

NM_003289.4(TPM2):c.757A>G (p.Ile253Val)

Variation ID: 1006848 Accession: VCV001006848.9

Type and length

single nucleotide variant, 1 bp

Location

Cytogenetic: 9p13.3 9: 35684261 (GRCh38) [ NCBI UCSC ] 9: 35684258 (GRCh37) [ NCBI UCSC ]

Timeline in ClinVar

	First in ClinVar Help The date this variant first appeared in ClinVar with each type of classification.	Last submission Help The date of the most recent submission for each type of classification for this variant.	Last evaluated Help The most recent date that a submitter evaluated this variant for each type of classification.
Germline	Mar 7, 2021	Feb 15, 2026	May 28, 2025

HGVS

Nucleotide	Protein	Molecular consequence
NM_003289.4:c.757A>G MANE Select Help Transcripts from the Matched Annotation from the NCBI and EMBL-EBI (MANE) collaboration.	NP_003280.2:p.Ile253Val	missense
NM_001301226.2:c.757A>G	NP_001288155.1:p.Ile253Val	missense
NM_001301227.2:c.757A>G	NP_001288156.1:p.Ile253Val	missense
NM_003289.3:c.757A>G
NM_213674.1:c.757A>G	NP_998839.1:p.Ile253Val	missense
NC_000009.12:g.35684261T>C
NC_000009.11:g.35684258T>C
NG_011620.1:g.10797A>G
LRG_680:g.10797A>G
LRG_680t1:c.757A>G	LRG_680p1:p.Ile253Val
LRG_680t2:c.757A>G

... more HGVS ... less HGVS

Protein change

I253V

Other names

Canonical SPDI

NC_000009.12:35684260:T:C

Global minor allele frequency (GMAF) Help The global minor allele frequency calculated by the 1000 Genomes Project. The minor allele at this location is indicated in parentheses and may be different from the allele represented by this VCV record.

Allele frequency Help The frequency of the allele represented by this VCV record.

The Genome Aggregation Database (gnomAD), exomes 0.00000

The Genome Aggregation Database (gnomAD), exomes 0.00001

Links

ClinGen: CA373363851 dbSNP: rs1476739780 VarSome

Genes

Gene	OMIM	ClinGen Gene Dosage Sensitivity Curation		Variation Viewer Help Links to Variation Viewer, a genome browser to view variation data from NCBI databases.	Related variants
Gene	OMIM	HI score Help The haploinsufficiency score for the gene, curated by ClinGen’s Dosage Sensitivity Curation task team.	TS score Help The triplosensitivity score for the gene, curated by ClinGen’s Dosage Sensitivity Curation task team.		Within gene Help The number of variants in ClinVar that are contained within this gene, with a link to view the list of variants.	All Help The number of variants in ClinVar for this gene, including smaller variants within the gene and larger CNVs that overlap or fully contain the gene.
TPM2		Little evidence for dosage pathogenicity	No evidence available	GRCh38 GRCh37	384	464

Conditions - Germline

Condition Help The condition for this variant-condition (RCV) record in ClinVar.	Classification Help The aggregate germline classification for this variant-condition (RCV) record in ClinVar. The number of submissions that contribute to this aggregate classification is shown in parentheses. (# of submissions)	Review status Help The aggregate review status for this variant-condition (RCV) record in ClinVar. This value is calculated by NCBI based on data from submitters. Read our rules for calculating the review status.	Last evaluated Help The most recent date that a submitter evaluated this variant for the condition.	Variation/condition record Help The RCV accession number, with most recent version number, for the variant-condition record, with a link to the RCV web page.
Arthrogryposis, distal, type 1A	Uncertain significance (1)	criteria provided, single submitter	May 29, 2024	RCV001303952.9
Inborn genetic diseases	Uncertain significance (1)	criteria provided, single submitter	May 28, 2025	RCV005503071.1

Submissions - Germline

Classification Help The submitted germline classification for each SCV record. (Last evaluated)	Review status Help Stars represent the review status, or the level of review supporting the submitted (SCV) record. This value is calculated by NCBI based on data from the submitter. Read our rules for calculating the review status. This column also includes a link to the submitter’s assertion criteria if provided, and the collection method. (Assertion criteria)	Condition Help The condition for the classification, provided by the submitter for this submitted (SCV) record. This column also includes the affected status and allele origin of individuals observed with this variant.	Submitter Help The submitting organization for this submitted (SCV) record. This column also includes the SCV accession and version number, the date this SCV first appeared in ClinVar, and the date that this SCV was last updated in ClinVar.	Expand all rows Collapse all rows Help This column includes more information supporting the classification, including citations, the comment on classification, and detailed evidence provided as observations of the variant by the submitter.
Uncertain significance (May 28, 2025) C Contributing to aggregate classification	criteria provided, single submitter (Ambry Variant Classification Scheme 2023)	Inborn genetic diseases	Ambry Genetics Accession: SCV006178442.1 First in ClinVar: Jul 13, 2025 Last updated: Jul 13, 2025	Comment: show The c.757A>G (p.I253V) alteration is located in exon 8 (coding exon 8) of the TPM2 gene. This alteration results from a A to G substitution at nucleotide position 757, causing the isoleucine (I) at amino acid position 253 to be replaced by a valine (V). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. (less) Observation: 1 Collection method: clinical testing Allele origin: germline Affected status: unknown Observation 1 Collection method: clinical testing Allele origin: germline Affected status: unknown

Uncertain significance (May 29, 2024) C Contributing to aggregate classification	criteria provided, single submitter (Invitae Variant Classification Sherloc (09022015))	Arthrogryposis, distal, type 1A	Labcorp Genetics (formerly Invitae), Labcorp Accession: SCV001493219.6 First in ClinVar: Mar 07, 2021 Last updated: Feb 15, 2026	Comment: show This sequence change replaces isoleucine, which is neutral and non-polar, with valine, which is neutral and non-polar, at codon 253 of the TPM2 protein (p.Ile253Val). This variant is present in population databases (no rsID available, gnomAD 0.0009%). This variant has not been reported in the literature in individuals affected with TPM2-related conditions. ClinVar contains an entry for this variant (Variation ID: 1006848). Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is not expected to disrupt TPM2 protein function with a negative predictive value of 80%. 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. (less) Observation: 1 Collection method: clinical testing Allele origin: germline Affected status: unknown Observation 1 Collection method: clinical testing Allele origin: germline Affected status: unknown

Comment:

The c.757A>G (p.I253V) alteration is located in exon 8 (coding exon 8) of the TPM2 gene. This alteration results from a A to G substitution at nucleotide position 757, causing the isoleucine (I) at amino acid position 253 to be replaced by a valine (V). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear.

Comment:

This sequence change replaces isoleucine, which is neutral and non-polar, with valine, which is neutral and non-polar, at codon 253 of the TPM2 protein (p.Ile253Val). This variant is present in population databases (no rsID available, gnomAD 0.0009%). This variant has not been reported in the literature in individuals affected with TPM2-related conditions. ClinVar contains an entry for this variant (Variation ID: 1006848). Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is not expected to disrupt TPM2 protein function with a negative predictive value of 80%. 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.

Citations for germline classification of this variant

There are no citations for germline classification of this variant in ClinVar. If you know of citations for this variation, please consider submitting that information to ClinVar.

Text-mined citations for rs1476739780 ...

These citations are identified by LitVar using the rs number, so they may include citations for more than one variant at this location. Please review the LitVar results carefully for your variant of interest.

Record last updated May 30, 2026