TPM1 p.Asp28Asn

Variant names:

• chr15-63042911-G-A
• rs397516391
• NM_001018005.2:c.82G>A
• TPM1 p.Asp28Asn

Your query was ambiguous. Multiple possible variants found:

• chr15-63042911-G-A
• chr15-63042911-GAC-AAT

Variant summary

Our verdict is Likely benign. The variant received -1 ACMG points: 4P and 5B. PM1 PM2 BP4 BS2

The NM_001018005.2(TPM1):​c.82G>A​(p.Asp28Asn) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00000343 in 1,457,046 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 Uncertain significance (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. D28H) has been classified as Uncertain significance. The gene TPM1 is included in the ClinGen Criteria Specification Registry.

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 0.0000034 (0 hom.)
• Consequence: TPM1 NM_001018005.2 missense
• Clinical Significance: Uncertain significance criteria provided, multiple submitters, no conflicts U:10
• Conservation: PhyloP100: 7.92
• Publications: 2 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: Likely_benign. The variant received -1 ACMG points.

• PM1: In a hotspot region, there are 2 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 0 benign, 33 uncertain in NM_001018005.2
• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.39926195).
• BS2: High AC in GnomAdExome4 at 5 AD gene.

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.82G>A	p.Asp28Asn	missense	Exon 1 of 10	NP_001018005.1	D9YZV4
	TPM1	NM_001365778.1		c.82G>A	p.Asp28Asn	missense	Exon 1 of 10	NP_001352707.1	Q6ZN40
	TPM1	NM_001407322.1		c.82G>A	p.Asp28Asn	missense	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.82G>A	p.Asp28Asn	missense	Exon 1 of 10	ENSP00000385107.4	P09493-1
	TPM1	ENST00000267996.11	TSL:1	c.82G>A	p.Asp28Asn	missense	Exon 1 of 9	ENSP00000267996.7	P09493-7
	TPM1	ENST00000288398.10	TSL:1	c.82G>A	p.Asp28Asn	missense	Exon 1 of 10	ENSP00000288398.6	P09493-10

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD2 exomes AF: 0.00000839 AC: 2 AN: 238332 AF XY: 0.00000773

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.0000569

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000343 AC: 5 AN: 1457046 Hom.: 0 Cov.: 31 AF XY: 0.00000414 AC XY: 3 AN XY: 724424

African (AFR) AF: 0.00 AC: 0 AN: 33398

American (AMR) AF: 0.00 AC: 0 AN: 44008

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26046

East Asian (EAS) AF: 0.0000253 AC: 1 AN: 39536

South Asian (SAS) AF: 0.0000351 AC: 3 AN: 85578

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 52590

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5760

European-Non Finnish (NFE) AF: 9.01e-7 AC: 1 AN: 1109962

Other (OTH) AF: 0.00 AC: 0 AN: 60168

GnomAD4 genome Cov.: 33

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.00000378

ClinVar

ClinVar submissions

Significance: Uncertain significance

Revision: criteria provided, multiple submitters, no conflicts

Pathogenic	VUS	Benign	Condition
-	3	-	Hypertrophic cardiomyopathy (3)
-	3	-	not provided (3)
-	2	-	Cardiomyopathy (2)
-	1	-	Cardiovascular phenotype (1)
-	1	-	not specified (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.19
CardioboostCm	Pathogenic	0.97
BayesDel_addAF	Uncertain	0.14	D
BayesDel_noAF	Uncertain	-0.030
CADD	Pathogenic	28
DANN	Uncertain	1.0
DEOGEN2	Benign	0.38	T
Eigen	Uncertain	0.21
Eigen_PC	Benign	0.19
FATHMM_MKL	Benign	0.57	D
LIST_S2	Benign	0.81	T
M_CAP	Pathogenic	0.45	D
MetaRNN	Benign	0.40	T
MetaSVM	Pathogenic	0.95	D
MutationAssessor	Pathogenic	3.1	M
PhyloP100		7.9
PrimateAI	Pathogenic	0.79	T
PROVEAN	Benign	-1.7	N
REVEL	Uncertain	0.36
Sift	Uncertain	0.0020	D
Sift4G	Benign	0.096	T
PromoterAI		-0.055	Neutral
Varity_R		0.61
gMVP		0.92
Mutation Taster		=4/96	disease causing

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

MaxEntScan Visualizer can be used to analyze the impact of this mutation on the neighboring sequence.

Other links and lift over

dbSNP: rs397516391;

hg19: chr15-63335110;