rs144879674

Positions:

Variant summary

Our verdict is Likely benign. Variant got -3 ACMG points: 2P and 5B. PM4BP6BS2

The NM_002234.4(KCNA5):c.213_245del(p.Asp72_Pro82del) variant causes a inframe deletion change. The variant allele was found at a frequency of 0.000545 in 152,242 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars). Synonymous variant affecting the same amino acid position (i.e. S62S) has been classified as Likely benign.

Frequency

Genomes: 𝑓 0.00055 ( 0 hom., cov: 33)

Exomes 𝑓: 0.00092 ( 1 hom. )

Failed GnomAD Quality Control

Consequence

KCNA5
NM_002234.4 inframe_deletion

Scores

Not classified

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:2B:3

Conservation

PhyloP100: 4.17

Variant links:

Genes affected

KCNA5 (HGNC:6224): (potassium voltage-gated channel subfamily A member 5) Potassium channels represent the most complex class of voltage-gated ino channels from both functional and structural standpoints. Their diverse functions include regulating neurotransmitter release, heart rate, insulin secretion, neuronal excitability, epithelial electrolyte transport, smooth muscle contraction, and cell volume. Four sequence-related potassium channel genes - shaker, shaw, shab, and shal - have been identified in Drosophila, and each has been shown to have human homolog(s). This gene encodes a member of the potassium channel, voltage-gated, shaker-related subfamily. This member contains six membrane-spanning domains with a shaker-type repeat in the fourth segment. It belongs to the delayed rectifier class, the function of which could restore the resting membrane potential of beta cells after depolarization and thereby contribute to the regulation of insulin secretion. This gene is intronless, and the gene is clustered with genes KCNA1 and KCNA6 on chromosome 12. Defects in this gene are a cause of familial atrial fibrillation type 7 (ATFB7). [provided by RefSeq, May 2012]

KCNA5 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -3 ACMG points.

PM4

Nonframeshift variant in NON repetitive region in NM_002234.4.

BP6

Variant 12-5044331-TCGGGAGTGCGGCCCTTGCCTCCGCTGCCGGACC-T is Benign according to our data. Variant chr12-5044331-TCGGGAGTGCGGCCCTTGCCTCCGCTGCCGGACC-T is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 537316.We mark this variant Likely_benign, oryginal submissions are: {Likely_benign=2, Uncertain_significance=2}. Variant chr12-5044331-TCGGGAGTGCGGCCCTTGCCTCCGCTGCCGGACC-T is described in Lovd as [Likely_benign].

BS2

High AC in GnomAd4 at 83 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
KCNA5	NM_002234.4 linkuse as main transcript	c.213_245del	p.Asp72_Pro82del	inframe_deletion	1/1	ENST00000252321.5

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
KCNA5	ENST00000252321.5 linkuse as main transcript	c.213_245del	p.Asp72_Pro82del	inframe_deletion	1/1		NM_002234.4	P1	P22460-1

Frequencies

GnomAD3 genomes

AF:

0.000546

AC:

AN:

152124

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000338

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000589

Gnomad ASJ

AF:

0.000288

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000415

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000838

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.000858

AC:

132

AN:

153812

Hom.:

AF XY:

0.00100

AC XY:

AN XY:

84636

show subpopulations

Gnomad AFR exome

AF:

0.000353

Gnomad AMR exome

AF:

0.000697

Gnomad ASJ exome

AF:

0.000244

Gnomad EAS exome

AF:

0.0000815

Gnomad SAS exome

AF:

0.00235

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000805

Gnomad OTH exome

AF:

0.000229

GnomAD4 exome

Data not reliable, filtered out with message: AS_VQSR

AF:

0.000918

AC:

1284

AN:

1398538

Hom.:

AF XY:

0.000954

AC XY:

659

AN XY:

690980

show subpopulations

Gnomad4 AFR exome

AF:

0.000247

Gnomad4 AMR exome

AF:

0.000594

Gnomad4 ASJ exome

AF:

0.000279

Gnomad4 EAS exome

AF:

0.0000808

Gnomad4 SAS exome

AF:

0.00208

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.000956

Gnomad4 OTH exome

AF:

0.000652

GnomAD4 genome

AF:

0.000545

AC:

AN:

152242

Hom.:

Cov.:

AF XY:

0.000457

AC XY:

AN XY:

74444

show subpopulations

Gnomad4 AFR

AF:

0.000337

Gnomad4 AMR

AF:

0.000588

Gnomad4 ASJ

AF:

0.000288

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.000415

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.000838

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000384

Hom.:

Bravo

AF:

0.000578

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:2Benign:3

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

Atrial fibrillation, familial, 7

Uncertain:2Benign:1

Uncertain significance, criteria provided, single submitter	clinical testing	Revvity Omics, Revvity	Feb 02, 2022	- -
Uncertain significance, criteria provided, single submitter	clinical testing	ARUP Laboratories, Molecular Genetics and Genomics, ARUP Laboratories	Sep 15, 2019	The KCNA5 c.213_245del, p.Asp72_Pro82del variant (rs144879674) is reported in the literature in two probands affected with atrial fibrillation as well as three affected relatives (Yang 2010). This variant results in an in-frame deletion of 11 residues that encompass a predicted Src SH2 domain binding motif and functional analysis demonstrated that this variant reduces channel activity; however, the clinical relevance of this observation is unknown. (Yang 2010). This variant is reported in ClinVar (Variation ID: 537316) and is found in the general population with an overall allele frequency of 0.079% (147/185,166 alleles) and a South Asian allele frequency of 0.24% in the Genome Aggregation Database. Due to limited information, the clinical significance of this variant is uncertain at this time. -
Likely benign, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Dec 04, 2023	- -

not specified

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

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

Aug 27, 2024

- -

not provided

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

GeneDx

Dec 09, 2020

This variant is associated with the following publications: (PMID: 32577384, 20638934, 32397294) -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

Splicing

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

LitVar

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over