14-64541643-G-T

Position:

• chr14-64541643-G-T

Variant summary

Our verdict is Uncertain significance. Variant got 4 ACMG points: 4P and 0B. PM2 PP3_Moderate

The NM_021979.4(HSPA2):​c.794G>T​(p.Arg265Leu) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency: Genomes: not found (cov: 31)
• Consequence: HSPA2 NM_021979.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 10.0

Genes affected

HSPA2 (HGNC:5235): (heat shock protein family A (Hsp70) member 2) Enables disordered domain specific binding activity; enzyme binding activity; and unfolded protein binding activity. Involved in negative regulation of inclusion body assembly and protein refolding. Located in cytosol. [provided by Alliance of Genome Resources, Apr 2022]

ACMG classification

Verdict is Uncertain_significance. Variant got 4 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.869

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
HSPA2	NM_021979.4	c.794G>T	p.Arg265Leu	missense_variant	1/1	ENST00000247207.7	NP_068814.2
HSPA2	NM_001387931.1	c.794G>T	p.Arg265Leu	missense_variant	2/2		NP_001374860.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
HSPA2	ENST00000247207.7	c.794G>T	p.Arg265Leu	missense_variant	1/1	6	NM_021979.4	ENSP00000247207.6
HSPA2	ENST00000394709.2	c.794G>T	p.Arg265Leu	missense_variant	2/2	1		ENSP00000378199.1

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD4 exome Cov.: 86

GnomAD4 genome Cov.: 31

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Jul 22, 2024

The c.794G>T (p.R265L) alteration is located in exon 1 (coding exon 1) of the HSPA2 gene. This alteration results from a G to T substitution at nucleotide position 794, causing the arginine (R) at amino acid position 265 to be replaced by a leucine (L). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.99
BayesDel_addAF	Pathogenic	0.20	D
BayesDel_noAF	Uncertain	0.060
CADD	Pathogenic	33
DANN	Uncertain	1.0
DEOGEN2	Benign	0.26	T;T
Eigen	Pathogenic	0.95
Eigen_PC	Pathogenic	0.80
FATHMM_MKL	Uncertain	0.96	D
LIST_S2	Benign	0.75	.;T
M_CAP	Benign	0.039	D
MetaRNN	Pathogenic	0.87	D;D
MetaSVM	Benign	-0.90	T
MutationAssessor	Pathogenic	3.6	H;H
PrimateAI	Pathogenic	0.91	D
PROVEAN	Pathogenic	-6.1	D;D
REVEL	Uncertain	0.39
Sift	Pathogenic	0.0	D;D
Sift4G	Pathogenic	0.0010	D;D
Polyphen		1.0	D;D
Vest4		0.89
MutPred		0.65		Loss of disorder (P = 0.0204);Loss of disorder (P = 0.0204);
MVP		0.78
ClinPred		1.0	D
GERP RS		4.0
Varity_R		0.96
gMVP		0.98

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

Publications

No publications associated with this variant yet.

Other links and lift over

hg19: chr14-65008361; COSMIC: COSV55971543; COSMIC: COSV55971543;