6-44250426-G-T

Position:

• chr6-44250426-G-T

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 2P and 1B. PM2 BP4

The NM_007355.4(HSP90AB1):​c.784G>T​(p.Gly262Cys) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 13/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: HSP90AB1 NM_007355.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 2.87

Genes affected

HSP90AB1 (HGNC:5258): (heat shock protein 90 alpha family class B member 1) This gene encodes a member of the heat shock protein 90 family; these proteins are involved in signal transduction, protein folding and degradation and morphological evolution. This gene encodes the constitutive form of the cytosolic 90 kDa heat-shock protein and is thought to play a role in gastric apoptosis and inflammation. Alternative splicing results in multiple transcript variants. Pseudogenes have been identified on multiple chromosomes. [provided by RefSeq, Dec 2012]

POLR1C (HGNC:):

ACMG classification

Verdict is Uncertain_significance. Variant got 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.2830861).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
HSP90AB1	NM_007355.4	c.784G>T	p.Gly262Cys	missense_variant	6/12	ENST00000371646.10

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
HSP90AB1	ENST00000371646.10	c.784G>T	p.Gly262Cys	missense_variant	6/12	1	NM_007355.4	P1
HSP90AB1	ENST00000353801.7	c.784G>T	p.Gly262Cys	missense_variant	6/12	1		P1
HSP90AB1	ENST00000371554.2	c.784G>T	p.Gly262Cys	missense_variant	6/12	5		P1
HSP90AB1	ENST00000620073.4	c.784G>T	p.Gly262Cys	missense_variant	6/12	5		P1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 33

GnomAD4 genome Cov.: 32

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 16, 2023

The c.784G>T (p.G262C) alteration is located in exon 6 (coding exon 5) of the HSP90AB1 gene. This alteration results from a G to T substitution at nucleotide position 784, causing the glycine (G) at amino acid position 262 to be replaced by a cysteine (C). 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	0.18
BayesDel_addAF	Benign	-0.18	T
BayesDel_noAF	Benign	-0.50
CADD	Benign	20
DANN	Uncertain	0.99
DEOGEN2	Benign	0.29	T;T;T;T
Eigen	Benign	-0.099
Eigen_PC	Benign	-0.16
FATHMM_MKL	Uncertain	0.90	D
LIST_S2	Benign	0.66	T;.;.;.
M_CAP	Benign	0.021	T
MetaRNN	Benign	0.28	T;T;T;T
MetaSVM	Benign	-0.99	T
MutationAssessor	Benign	1.8	L;L;L;L
MutationTaster	Benign	1.0	N;N;N
PrimateAI	Uncertain	0.51	T
PROVEAN	Benign	-0.81	.;N;N;N
REVEL	Benign	0.086
Sift	Uncertain	0.014	.;D;D;D
Sift4G	Uncertain	0.043	D;D;D;D
Polyphen		0.98	D;D;D;D
Vest4		0.26
MutPred		0.39		Loss of helix (P = 0.0558);Loss of helix (P = 0.0558);Loss of helix (P = 0.0558);Loss of helix (P = 0.0558);
MVP		0.61
MPC		1.1
ClinPred		0.81	D
GERP RS		3.5
RBP_binding_hub_radar		1.1
RBP_regulation_power_radar		3.8
Varity_R		0.23
gMVP		0.26

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: chr6-44218163;