1-169106829-C-A

Position:

• chr1-169106829-C-A

Variant summary

Our verdict is Benign. Variant got -8 ACMG points: 0P and 8B. BP4_Moderate BP6_Moderate BS2

The NM_001677.4(ATP1B1):​c.-1C>A variant causes a 5 prime UTR change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000479 in 1,578,024 control chromosomes in the GnomAD database, including 3 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★).

• Frequency:
  • Genomes: 𝑓 0.0027 (1 hom., cov: 32)
  • Exomes 𝑓: 0.00024 (2 hom.)
• Consequence: ATP1B1 NM_001677.4 5_prime_UTR
• Clinical Significance: Benign criteria provided, single submitter B:1
• Conservation: PhyloP100: 0.627

Genes affected

ATP1B1 (HGNC:804): (ATPase Na+/K+ transporting subunit beta 1) 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 1 subunit. Alternatively spliced transcript variants encoding different isoforms have been described, but their biological validity is not known. [provided by RefSeq, Mar 2010]

ACMG classification

Verdict is Benign. Variant got -8 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.27).
• BP6: Variant 1-169106829-C-A is Benign according to our data. Variant chr1-169106829-C-A is described in ClinVar as [Benign]. Clinvar id is 933171.Status of the report is criteria_provided_single_submitter, 1 stars.
• BS2: High AC in GnomAd4 at 417 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
ATP1B1	NM_001677.4	c.-1C>A		5_prime_UTR_variant	1/6	ENST00000367815.9

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
ATP1B1	ENST00000367815.9	c.-1C>A		5_prime_UTR_variant	1/6	1	NM_001677.4	P1

Frequencies

GnomAD3 genomes AF: 0.00273 AC: 415 AN: 152206 Hom.: 1 Cov.: 32

Gnomad AFR AF: 0.00936

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00111

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.0000441

Gnomad OTH AF: 0.00334

GnomAD3 exomes AF: 0.000567 AC: 120 AN: 211690 Hom.: 0 AF XY: 0.000326 AC XY: 38 AN XY: 116462

Gnomad AFR exome AF: 0.00971

Gnomad AMR exome AF: 0.000334

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.0000207

Gnomad OTH exome AF: 0.000617

GnomAD4 exome AF: 0.000238 AC: 339 AN: 1425710 Hom.: 2 Cov.: 30 AF XY: 0.000209 AC XY: 148 AN XY: 708938

Gnomad4 AFR exome AF: 0.00899

Gnomad4 AMR exome AF: 0.000513

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.0000486

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00000820

Gnomad4 OTH exome AF: 0.000631

GnomAD4 genome AF: 0.00274 AC: 417 AN: 152314 Hom.: 1 Cov.: 32 AF XY: 0.00267 AC XY: 199 AN XY: 74468

Gnomad4 AFR AF: 0.00938

Gnomad4 AMR AF: 0.00111

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.00

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.0000441

Gnomad4 OTH AF: 0.00331

Alfa AF: 0.00227 Hom.: 1

Bravo AF: 0.00312

ClinVar

Significance: Benign

Submissions summary: Benign:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Benign:1

Benign, criteria provided, single submitter

clinical testing

Women's Health and Genetics/Laboratory Corporation of America, LabCorp

Jun 15, 2020

Variant summary: ATP1B1 c.-1C>A is located in the untranslated mRNA region upstream of the initiation codon. The variant allele was found at a frequency of 0.00057 in 211690 control chromosomes, predominantly at a frequency of 0.0097 within the African or African-American subpopulation in the gnomAD database. The observed variant frequency within African or African-American control individuals in the gnomAD database is approximately 970 fold of the estimated maximal expected allele frequency for a pathogenic variant in ATP1B1 causing Arrhythmia phenotype (1e-05), strongly suggesting that the variant is a benign polymorphism found primarily in populations of African or African-American origin. To our knowledge, no occurrence of c.-1C>A in individuals affected with Arrhythmia and no experimental evidence demonstrating its impact on protein function have been reported. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar after 2014. Based on the evidence outlined above, the variant was classified as benign. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.27
CADD	Benign	17
DANN	Benign	0.95

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

LitVar

Other links and lift over

dbSNP: rs144750047; hg19: chr1-169076067;