1-154162360-G-A

Variant summary

Our verdict is Likely benign. Variant got -5 ACMG points: 0P and 5B. BP4_Strong BS1_Supporting

The NM_152263.4(TPM3):c.*5577C>T variant causes a 3 prime UTR change involving the alteration of a non-conserved nucleotide. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: 𝑓 0.0013 (0 hom., cov: 20)
• Consequence: TPM3 NM_152263.4 3_prime_UTR
• Clinical Significance: Uncertain significance criteria provided, single submitter U:2
• Conservation: PhyloP100: -0.447

Genes affected

TPM3 (HGNC:12012): (tropomyosin 3) This gene encodes a member of the tropomyosin family of actin-binding proteins. Tropomyosins are dimers of coiled-coil proteins that provide stability to actin filaments and regulate access of other actin-binding proteins. Mutations in this gene result in autosomal dominant nemaline myopathy and other muscle disorders. This locus is involved in translocations with other loci, including anaplastic lymphoma receptor tyrosine kinase (ALK) and neurotrophic tyrosine kinase receptor type 1 (NTRK1), which result in the formation of fusion proteins that act as oncogenes. There are numerous pseudogenes for this gene on different chromosomes. Alternative splicing results in multiple transcript variants. [provided by RefSeq, May 2013]

ACMG classification

Verdict is Likely_benign. Variant got -5 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.97).
• BS1: Variant frequency is greater than expected in population sas. gnomad4 allele frequency = 0.00127 (110/86372) while in subpopulation SAS AF= 0.000907 (2/2204). AF 95% confidence interval is 0.000562. There are 0 homozygotes in gnomad4. There are 51 alleles in male gnomad4 subpopulation. Median coverage is 20. This position pass quality control queck. Existence of Clinvar submissions makes me limit the strength of this signal to Supporting

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
TPM3	NM_152263.4	c.*5577C>T		3_prime_UTR_variant	10/10	ENST00000651641.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
TPM3	ENST00000651641.1	c.*5577C>T		3_prime_UTR_variant	10/10		NM_152263.4	P1

Frequencies

GnomAD3 genomes AF: 0.00127 AC: 110 AN: 86372 Hom.: 0 Cov.: 20

Gnomad AFR AF: 0.000337

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.000372

Gnomad ASJ AF: 0.0216

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.000907

Gnomad FIN AF: 0.000769

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.000754

Gnomad OTH AF: 0.00299

We have no GnomAD4 exomes data on this position. Probably position not covered by the project.

GnomAD4 genome AF: 0.00127 AC: 110 AN: 86372 Hom.: 0 Cov.: 20 AF XY: 0.00131 AC XY: 51 AN XY: 38964

Gnomad4 AFR AF: 0.000337

Gnomad4 AMR AF: 0.000372

Gnomad4 ASJ AF: 0.0216

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.000907

Gnomad4 FIN AF: 0.000769

Gnomad4 NFE AF: 0.000754

Gnomad4 OTH AF: 0.00299

Alfa AF: 0.00101 Hom.: 0

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, single submitter

Submissions by phenotype

Congenital myopathy with fiber type disproportion Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Jun 14, 2016

- -

Nemaline myopathy Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Jun 14, 2016

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.97
Cadd	Benign	0.37
Dann	Benign	0.35

Splicing

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

LitVar

Other links and lift over

dbSNP: rs886045287; hg19: chr1-154134836;