chr14-64541615-A-G

Position:

• chr14-64541615-A-G

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_021979.4(HSPA2):​c.766A>G​(p.Ile256Val) 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 benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 31)
• Consequence: HSPA2 NM_021979.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 7.36

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 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.19917011).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
HSPA2	NM_021979.4	c.766A>G	p.Ile256Val	missense_variant	1/1	ENST00000247207.7	NP_068814.2
HSPA2	NM_001387931.1	c.766A>G	p.Ile256Val	missense_variant	2/2		NP_001374860.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
HSPA2	ENST00000247207.7	c.766A>G	p.Ile256Val	missense_variant	1/1		NM_021979.4	ENSP00000247207	P1
HSPA2	ENST00000394709.2	c.766A>G	p.Ile256Val	missense_variant	2/2	1		ENSP00000378199	P1
HSPA2	ENST00000554883.1			downstream_gene_variant		3

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

Oct 03, 2023

The c.766A>G (p.I256V) alteration is located in exon 1 (coding exon 1) of the HSPA2 gene. This alteration results from a A to G substitution at nucleotide position 766, causing the isoleucine (I) at amino acid position 256 to be replaced by a valine (V). 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	Benign	0.091
BayesDel_addAF	Benign	-0.11	T
BayesDel_noAF	Benign	-0.39
CADD	Uncertain	24
DANN	Uncertain	0.99
DEOGEN2	Benign	0.066	T;T
Eigen	Benign	0.018
Eigen_PC	Benign	0.18
FATHMM_MKL	Uncertain	0.96	D
LIST_S2	Benign	0.73	.;T
M_CAP	Benign	0.0072	T
MetaRNN	Benign	0.20	T;T
MetaSVM	Benign	-0.75	T
MutationAssessor	Benign	0.84	L;L
MutationTaster	Benign	0.99	D;D
PrimateAI	Uncertain	0.59	T
PROVEAN	Benign	-0.71	N;N
REVEL	Benign	0.17
Sift	Uncertain	0.0020	D;D
Sift4G	Benign	0.13	T;T
Polyphen		0.0	B;B
Vest4		0.33
MutPred		0.46		Gain of catalytic residue at G257 (P = 0.0555);Gain of catalytic residue at G257 (P = 0.0555);
MVP		0.29
ClinPred		0.58	D
GERP RS		5.0
Varity_R		0.51
gMVP		0.71

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: chr14-65008333;