chr14-64541169-A-G

Position:

• chr14-64541169-A-G

Variant summary

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

The NM_021979.4(HSPA2):​c.320A>G​(p.Glu107Gly) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.000000684 in 1,461,874 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 6.8e-7 (0 hom.)
• Consequence: HSPA2 NM_021979.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 9.29

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 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
HSPA2	NM_021979.4	c.320A>G	p.Glu107Gly	missense_variant	1/1	ENST00000247207.7	NP_068814.2
HSPA2	NM_001387931.1	c.320A>G	p.Glu107Gly	missense_variant	2/2		NP_001374860.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
HSPA2	ENST00000247207.7	c.320A>G	p.Glu107Gly	missense_variant	1/1		NM_021979.4	ENSP00000247207	P1
HSPA2	ENST00000394709.2	c.320A>G	p.Glu107Gly	missense_variant	2/2	1		ENSP00000378199	P1
HSPA2	ENST00000554883.1	n.219-168A>G		intron_variant, non_coding_transcript_variant		3

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome AF: 6.84e-7 AC: 1 AN: 1461874 Hom.: 0 Cov.: 30 AF XY: 0.00 AC XY: 0 AN XY: 727238

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 8.99e-7

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 33

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

Dec 02, 2021

The c.320A>G (p.E107G) 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 320, causing the glutamic acid (E) at amino acid position 107 to be replaced by a glycine (G). 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	0.28
BayesDel_addAF	Uncertain	0.084	D
BayesDel_noAF	Benign	-0.12
CADD	Pathogenic	27
DANN	Uncertain	1.0
DEOGEN2	Benign	0.21	T;T
Eigen	Uncertain	0.52
Eigen_PC	Uncertain	0.57
FATHMM_MKL	Uncertain	0.94	D
LIST_S2	Benign	0.56	.;T
M_CAP	Benign	0.036	D
MetaRNN	Uncertain	0.43	T;T
MetaSVM	Benign	-1.1	T
MutationAssessor	Uncertain	2.5	M;M
MutationTaster	Benign	1.0	D;D
PrimateAI	Uncertain	0.67	T
PROVEAN	Uncertain	-3.5	D;D
REVEL	Uncertain	0.42
Sift	Uncertain	0.0040	D;D
Sift4G	Uncertain	0.0060	D;D
Polyphen		0.53	P;P
Vest4		0.52
MutPred		0.34		Gain of catalytic residue at K103 (P = 0.0057);Gain of catalytic residue at K103 (P = 0.0057);
MVP		0.39
ClinPred		0.99	D
GERP RS		5.2
Varity_R		0.80
gMVP		0.91

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: chr14-65007887;