rs76708779

Positions:

chr12-5045297-G-A

Variant summary

Our verdict is Benign. Variant got -16 ACMG points: 0P and 16B. BP4_StrongBP6_Very_StrongBS2

The NM_002234.4(KCNA5):c.1150G>A(p.Gly384Arg) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0012 in 1,614,122 control chromosomes in the GnomAD database, including 10 homozygotes. In-silico tool predicts a benign outcome for this variant. 12/20 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★).

Frequency

Genomes: 𝑓 0.0041 ( 5 hom., cov: 32)

Exomes 𝑓: 0.00090 ( 5 hom. )

Consequence

KCNA5
NM_002234.4 missense

Scores

Clinical Significance

Benign/Likely benign criteria provided, multiple submitters, no conflicts B:5

Conservation

PhyloP100: 1.21

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 Benign. Variant got -16 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.008991748).

BP6

Variant 12-5045297-G-A is Benign according to our data. Variant chr12-5045297-G-A is described in ClinVar as [Likely_benign]. Clinvar id is 191572.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr12-5045297-G-A is described in Lovd as [Benign].

BS2

High AC in GnomAd4 at 623 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
KCNA5	NM_002234.4 linkuse as main transcript	c.1150G>A	p.Gly384Arg	missense_variant	1/1	ENST00000252321.5	NP_002225.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
KCNA5	ENST00000252321.5 linkuse as main transcript	c.1150G>A	p.Gly384Arg	missense_variant	1/1		NM_002234.4	ENSP00000252321	P1	P22460-1

Frequencies

GnomAD3 genomes

AF:

0.00409

AC:

623

AN:

152198

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0133

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00137

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:

0.000632

Gnomad OTH

AF:

0.00382

GnomAD3 exomes

AF:

0.00131

AC:

330

AN:

251342

Hom.:

AF XY:

0.000920

AC XY:

125

AN XY:

135856

show subpopulations

Gnomad AFR exome

AF:

0.0151

Gnomad AMR exome

AF:

0.000954

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.000139

Gnomad NFE exome

AF:

0.000387

Gnomad OTH exome

AF:

0.000653

GnomAD4 exome

AF:

0.000896

AC:

1310

AN:

1461806

Hom.:

Cov.:

AF XY:

0.000886

AC XY:

644

AN XY:

727212

show subpopulations

Gnomad4 AFR exome

AF:

0.0150

Gnomad4 AMR exome

AF:

0.00125

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.0000252

Gnomad4 SAS exome

AF:

0.0000232

Gnomad4 FIN exome

AF:

0.000337

Gnomad4 NFE exome

AF:

0.000565

Gnomad4 OTH exome

AF:

0.00144

GnomAD4 genome

AF:

0.00409

AC:

623

AN:

152316

Hom.:

Cov.:

AF XY:

0.00388

AC XY:

289

AN XY:

74464

show subpopulations

Gnomad4 AFR

AF:

0.0133

Gnomad4 AMR

AF:

0.00131

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.000632

Gnomad4 OTH

AF:

0.00378

Alfa

AF:

0.00150

Hom.:

Bravo

AF:

0.00465

ESP6500AA

AF:

0.0148

AC:

ESP6500EA

AF:

0.000465

AC:

ExAC

AF:

0.00151

AC:

183

Asia WGS

AF:

0.000289

AC:

AN:

3478

EpiCase

AF:

0.000709

EpiControl

AF:

0.000237

ClinVar

Significance: Benign/Likely benign

Submissions summary: Benign:5

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Atrial fibrillation, familial, 7

Benign:2

Benign, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Dec 31, 2019	- -
Likely benign, criteria provided, single submitter	clinical testing	Illumina Laboratory Services, Illumina	Jan 13, 2018	This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score and internal cut-off values, a variant classified as likely benign is not then subjected to further curation. The score for this variant resulted in a classification of likely benign for this disease. -

not provided

Benign:2

Benign, criteria provided, single submitter	clinical testing	GeneDx	Oct 19, 2020	- -
Likely benign, criteria provided, single submitter	not provided	Breakthrough Genomics, Breakthrough Genomics	-	- -

not specified

Benign:1

Benign, criteria provided, single submitter

research

Biesecker Lab/Clinical Genomics Section, National Institutes of Health

Jun 24, 2013

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.19

BayesDel_addAF

Benign

-0.27

BayesDel_noAF

Benign

-0.15

CADD

Benign

DANN

Uncertain

1.0

DEOGEN2

Uncertain

0.61

Eigen

Benign

-0.17

Eigen_PC

Benign

-0.25

FATHMM_MKL

Benign

0.31

LIST_S2

Uncertain

0.86

MetaRNN

Benign

0.0090

MetaSVM

Uncertain

0.46

MutationAssessor

Benign

1.7

MutationTaster

Benign

1.0

PrimateAI

Uncertain

0.52

PROVEAN

Benign

-1.2

REVEL

Uncertain

0.31

Sift

Benign

0.035

Sift4G

Benign

0.11

Polyphen

0.97

Vest4

0.34

MutPred

0.46

Gain of methylation at G384 (P = 0.0335);

MVP

1.0

MPC

1.4

ClinPred

0.023

GERP RS

4.6

Varity_R

0.10

gMVP

0.68

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

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