17-7654629-T-C

Variant summary

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

The NM_001678.5(ATP1B2):c.554T>C(p.Val185Ala) variant causes a missense, splice region change. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. 3/3 splice prediction tools predict no significant impact on normal splicing. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 31)
• Consequence: ATP1B2 NM_001678.5 missense, splice_region
• Scores: Splicing: ADA: 0.06131
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 5.16

Genes affected

ATP1B2 (HGNC:805): (ATPase Na+/K+ transporting subunit beta 2) The protein encoded by this gene belongs to the family of Na+/K+ and H+/K+ ATPases beta chain proteins, and to the subfamily of Na+/K+ -ATPases. Na+/K+ -ATPase is an integral membrane protein responsible for establishing and maintaining the electrochemical gradients of Na and K ions across the plasma membrane. These gradients are essential for osmoregulation, for sodium-coupled transport of a variety of organic and inorganic molecules, and for electrical excitability of nerve and muscle. This enzyme is composed of two subunits, a large catalytic subunit (alpha) and a smaller glycoprotein subunit (beta). The beta subunit regulates, through assembly of alpha/beta heterodimers, the number of sodium pumps transported to the plasma membrane. The glycoprotein subunit of Na+/K+ -ATPase is encoded by multiple genes. This gene encodes a beta 2 subunit. Two transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Dec 2014]

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, 0.917

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
ATP1B2	NM_001678.5	c.554T>C	p.Val185Ala	missense_variant, splice_region_variant	5/7	ENST00000250111.9
ATP1B2	NM_001303263.2	c.308T>C	p.Val103Ala	missense_variant, splice_region_variant	4/6

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
ATP1B2	ENST00000250111.9	c.554T>C	p.Val185Ala	missense_variant, splice_region_variant	5/7	1	NM_001678.5	P1
ATP1B2	ENST00000577113.1	c.152T>C	p.Val51Ala	missense_variant, splice_region_variant	2/6	3
ATP1B2	ENST00000577026.5	c.308T>C	p.Val103Ala	missense_variant, splice_region_variant	4/6	4

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD4 exome Cov.: 31

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

Mar 29, 2022

The c.554T>C (p.V185A) alteration is located in exon 5 (coding exon 5) of the ATP1B2 gene. This alteration results from a T to C substitution at nucleotide position 554, causing the valine (V) at amino acid position 185 to be replaced by an alanine (A). 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	0.98
BayesDel_addAF	Benign	-0.016	T
BayesDel_noAF	Benign	-0.26
Cadd	Uncertain	24
Dann	Uncertain	1.0
Eigen	Benign	0.11
Eigen_PC	Benign	0.19
FATHMM_MKL	Uncertain	0.90	D
LIST_S2	Benign	0.77	T;T
M_CAP	Benign	0.063	D
MetaRNN	Pathogenic	0.92	D;D
MetaSVM	Benign	-0.85	T
MutationTaster	Benign	1.0	D
PrimateAI	Pathogenic	0.85	D
Sift4G	Uncertain	0.0030	D;D
Polyphen		0.22	.;B
Vest4		0.68
MutPred		0.84		.;Loss of stability (P = 0.0141);
MVP		0.62
MPC		0.69
ClinPred		0.98	D
GERP RS		4.3
Varity_R		0.69
gMVP		0.88

Splicing

Name	Calibrated prediction	Score	Prediction
dbscSNV1_ADA	Benign	0.061
dbscSNV1_RF	Benign	0.34
SpliceAI score (max)		0.050		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: chr17-7557947;