NM_002234.4:c.751G>A

Variant names:

Variant summary

Our verdict is Benign. The variant received -20 ACMG points: 0P and 20B. BP4_StrongBP6_Very_StrongBS1BS2

The NM_002234.4(KCNA5):c.751G>A(p.Ala251Thr) variant causes a missense change. The variant allele was found at a frequency of 0.0135 in 1,613,840 control chromosomes in the GnomAD database, including 216 homozygotes. In-silico tool predicts a benign outcome for this variant. 14/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★).

Frequency

Genomes: 𝑓 0.011 ( 28 hom., cov: 32)

Exomes 𝑓: 0.014 ( 188 hom. )

Consequence

KCNA5
NM_002234.4 missense

Scores

Clinical Significance

Benign/Likely benign criteria provided, multiple submitters, no conflicts B:11

Conservation

PhyloP100: 4.67

Publications

11 publications found

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 Gene-Disease associations (from GenCC):

atrial fibrillation, familial, 7
Inheritance: AD Classification: MODERATE, LIMITED Submitted by: Labcorp Genetics (formerly Invitae), Ambry Genetics
familial atrial fibrillation
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

KCNA5 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -20 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.004824847).

BP6

Variant 12-5044898-G-A is Benign according to our data. Variant chr12-5044898-G-A is described in ClinVar as Benign/Likely_benign. ClinVar VariationId is 191570.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BS1

Variant frequency is greater than expected in population amr. GnomAd4 allele frequency = 0.0112 (1706/152100) while in subpopulation AMR AF = 0.0344 (526/15294). AF 95% confidence interval is 0.032. There are 28 homozygotes in GnomAd4. There are 868 alleles in the male GnomAd4 subpopulation. Median coverage is 32. This position passed quality control check.

BS2

High AC in GnomAd4 at 1706 AD gene.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_002234.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	KCNA5	NM_002234.4	MANE Select	c.751G>A	p.Ala251Thr	missense	Exon 1 of 1	NP_002225.2

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	KCNA5	ENST00000252321.5	TSL:6 MANE Select	c.751G>A	p.Ala251Thr	missense	Exon 1 of 1	ENSP00000252321.3	P22460-1

Frequencies

GnomAD3 genomes

AF:

0.0112

AC:

1705

AN:

151982

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00263

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0344

Gnomad ASJ

AF:

0.000865

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00851

Gnomad FIN

AF:

0.00943

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0134

Gnomad OTH

AF:

0.00622

GnomAD2 exomes

AF:

0.0144

AC:

3627

AN:

251108

AF XY:

0.0134

show subpopulations

Gnomad AFR exome

AF:

0.00252

Gnomad AMR exome

AF:

0.0456

Gnomad ASJ exome

AF:

0.00228

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.0113

Gnomad NFE exome

AF:

0.0128

Gnomad OTH exome

AF:

0.0132

GnomAD4 exome

AF:

0.0137

AC:

20070

AN:

1461740

Hom.:

188

Cov.:

AF XY:

0.0133

AC XY:

9690

AN XY:

727178

show subpopulations

African (AFR)

AF:

0.00239

AC:

AN:

33480

American (AMR)

AF:

0.0433

AC:

1938

AN:

44724

Ashkenazi Jewish (ASJ)

AF:

0.00207

AC:

AN:

26136

East Asian (EAS)

AF:

0.0000252

AC:

AN:

39700

South Asian (SAS)

AF:

0.00815

AC:

703

AN:

86258

European-Finnish (FIN)

AF:

0.0108

AC:

573

AN:

53268

Middle Eastern (MID)

AF:

0.00485

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

0.0143

AC:

15885

AN:

1112010

Other (OTH)

AF:

0.0134

AC:

808

AN:

60396

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.472

Heterozygous variant carriers

1444

2888

4331

5775

7219

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

Variant carriers

632

1264

1896

2528

3160

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.0112

AC:

1706

AN:

152100

Hom.:

Cov.:

AF XY:

0.0117

AC XY:

868

AN XY:

74340

show subpopulations

African (AFR)

AF:

0.00262

AC:

109

AN:

41526

American (AMR)

AF:

0.0344

AC:

526

AN:

15294

Ashkenazi Jewish (ASJ)

AF:

0.000865

AC:

AN:

3468

East Asian (EAS)

AF:

0.00

AC:

AN:

5100

South Asian (SAS)

AF:

0.00852

AC:

AN:

4812

European-Finnish (FIN)

AF:

0.00943

AC:

100

AN:

10608

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.0134

AC:

914

AN:

67974

Other (OTH)

AF:

0.00616

AC:

AN:

2112

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.483

Heterozygous variant carriers

166

249

332

415

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Genome Hom

Variant carriers

110

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.0110

Hom.:

Bravo

AF:

0.0118

TwinsUK

AF:

0.0186

AC:

ALSPAC

AF:

0.0174

AC:

ESP6500AA

AF:

0.00318

AC:

ESP6500EA

AF:

0.0127

AC:

109

ExAC

AF:

0.0131

AC:

1589

Asia WGS

AF:

0.00404

AC:

AN:

3478

EpiCase

AF:

0.0119

EpiControl

AF:

0.0133

ClinVar

ClinVar submissions

Significance:Benign/Likely benign

Revision:criteria provided, multiple submitters, no conflicts

View on ClinVar

Pathogenic

VUS

Benign

Condition

not specified (5)

Atrial fibrillation, familial, 7 (3)

not provided (3)

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.12

BayesDel_addAF

Benign

-0.53

BayesDel_noAF

Benign

-0.50

CADD

Benign

(source)

DANN

Uncertain

0.99

DEOGEN2

Benign

0.35

Eigen

Benign

-0.011

Eigen_PC

Benign

0.15

FATHMM_MKL

Uncertain

0.92

LIST_S2

Uncertain

0.88

MetaRNN

Benign

0.0048

MetaSVM

Benign

-0.90

MutationAssessor

Benign

1.3

PhyloP100

4.7

PrimateAI

Benign

0.47

PROVEAN

Benign

-1.4

REVEL

Benign

0.080

Sift

Benign

0.081

Sift4G

Benign

0.39

Polyphen

0.0070

Vest4

0.27

MPC

0.62

ClinPred

0.0057

GERP RS

4.8

Varity_R

0.11

gMVP

0.73

Mutation Taster

=91/9

polymorphism (auto)

(source)

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over