15-63042880-C-T

Variant names:

• chr15-63042880-C-T
• rs878854150
• NM_001018005.2:c.51C>T

Variant summary

Our verdict is Benign. The variant received -9 ACMG points: 2P and 11B. PM2 BP4_Moderate BP6_Very_Strong BP7

The NM_001018005.2(TPM1):​c.51C>T​(p.Asn17Asn) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000137 in 1,461,004 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★). The gene TPM1 is included in the ClinGen Criteria Specification Registry.

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 0.0000014 (0 hom.)
• Consequence: TPM1 NM_001018005.2 synonymous
• Clinical Significance: Likely benign criteria provided, multiple submitters, no conflicts B:2
• Conservation: PhyloP100: -0.233
• Publications: 1 publications found

Genes affected

TPM1 (HGNC:12010): (tropomyosin 1) This gene is a member of the tropomyosin family of highly conserved, widely distributed actin-binding proteins involved in the contractile system of striated and smooth muscles and the cytoskeleton of non-muscle cells. Tropomyosin is composed of two alpha-helical chains arranged as a coiled-coil. It is polymerized end to end along the two grooves of actin filaments and provides stability to the filaments. The encoded protein is one type of alpha helical chain that forms the predominant tropomyosin of striated muscle, where it also functions in association with the troponin complex to regulate the calcium-dependent interaction of actin and myosin during muscle contraction. In smooth muscle and non-muscle cells, alternatively spliced transcript variants encoding a range of isoforms have been described. Mutations in this gene are associated with type 3 familial hypertrophic cardiomyopathy and dilated cardiomyopathy 1Y. [provided by RefSeq, Jun 2022]

TPM1-AS (HGNC:53635): (TPM1 antisense RNA)

ACMG classification

Specifications for TPM1 are available in the ClinGen Criteria Specification Registry and recommended for reference when assigning criteria.

Our verdict: Benign. The variant received -9 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.38).
• BP6: Variant 15-63042880-C-T is Benign according to our data. Variant chr15-63042880-C-T is described in ClinVar as Likely_benign. ClinVar VariationId is 1102187.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.
• BP7: Synonymous conserved (PhyloP=-0.233 with no splicing effect.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001018005.2. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	TPM1	NM_001018005.2	MANE Select	c.51C>T	p.Asn17Asn	synonymous	Exon 1 of 10	NP_001018005.1	D9YZV4
	TPM1	NM_001365778.1		c.51C>T	p.Asn17Asn	synonymous	Exon 1 of 10	NP_001352707.1	Q6ZN40
	TPM1	NM_001407322.1		c.51C>T	p.Asn17Asn	synonymous	Exon 1 of 11	NP_001394251.1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	TPM1	ENST00000403994.9	TSL:1 MANE Select	c.51C>T	p.Asn17Asn	synonymous	Exon 1 of 10	ENSP00000385107.4	P09493-1
	TPM1	ENST00000267996.11	TSL:1	c.51C>T	p.Asn17Asn	synonymous	Exon 1 of 9	ENSP00000267996.7	P09493-7
	TPM1	ENST00000288398.10	TSL:1	c.51C>T	p.Asn17Asn	synonymous	Exon 1 of 10	ENSP00000288398.6	P09493-10

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD2 exomes AF: 0.00000403 AC: 1 AN: 248262 AF XY: 0.00

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00000898

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000137 AC: 2 AN: 1461004 Hom.: 0 Cov.: 31 AF XY: 0.00000275 AC XY: 2 AN XY: 726842

African (AFR) AF: 0.00 AC: 0 AN: 33448

American (AMR) AF: 0.00 AC: 0 AN: 44678

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26094

East Asian (EAS) AF: 0.00 AC: 0 AN: 39668

South Asian (SAS) AF: 0.0000116 AC: 1 AN: 86214

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53322

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5766

European-Non Finnish (NFE) AF: 9.00e-7 AC: 1 AN: 1111470

Other (OTH) AF: 0.00 AC: 0 AN: 60344

GnomAD4 genome Cov.: 33

ClinVar

ClinVar submissions

Significance: Likely benign

Revision: criteria provided, multiple submitters, no conflicts

Pathogenic	VUS	Benign	Condition
-	-	2	Hypertrophic cardiomyopathy (2)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.38
CADD	Benign	11
DANN	Benign	0.96
PhyloP100		-0.23
PromoterAI		-0.050	Neutral
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		2.7

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.0		Details are displayed if max score is > 0.2

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

Other links and lift over

dbSNP: rs878854150; hg19: chr15-63335079;