chr19-49070214-C-T

Variant names:

• chr19-49070214-C-T
• rs559662958
• NM_031886.3:c.1220G>A

Variant summary

Our verdict is Likely benign. The variant received -4 ACMG points: 0P and 4B. BP4_Strong

The NM_031886.3(KCNA7):​c.1220G>A​(p.Gly407Asp) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000233 in 1,461,888 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 14/22 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.000023 (0 hom.)
• Consequence: KCNA7 NM_031886.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: -0.0710
• Publications: 0 publications found

Genes affected

KCNA7 (HGNC:6226): (potassium voltage-gated channel subfamily A member 7) Potassium channels represent the most complex class of voltage-gated ion 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. The gene is expressed preferentially in skeletal muscle, heart and kidney. It is a candidate gene for inherited cardiac disorders. [provided by RefSeq, Jul 2008]

ACMG classification

Our verdict: Likely_benign. The variant received -4 ACMG points.

• BP4: Computational evidence support a benign effect (MetaRNN=0.033020794).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_031886.3. 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
	KCNA7	NM_031886.3	MANE Select	c.1220G>A	p.Gly407Asp	missense	Exon 2 of 2	NP_114092.2

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	KCNA7	ENST00000221444.2	TSL:1 MANE Select	c.1220G>A	p.Gly407Asp	missense	Exon 2 of 2	ENSP00000221444.1	Q96RP8

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD2 exomes AF: 0.0000477 AC: 12 AN: 251418 AF XY: 0.0000515

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.000381

Gnomad FIN exome AF: 0.0000462

Gnomad NFE exome AF: 0.0000352

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.0000233 AC: 34 AN: 1461888 Hom.: 0 Cov.: 48 AF XY: 0.0000261 AC XY: 19 AN XY: 727244

African (AFR) AF: 0.00 AC: 0 AN: 33480

American (AMR) AF: 0.00 AC: 0 AN: 44724

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26136

East Asian (EAS) AF: 0.000353 AC: 14 AN: 39700

South Asian (SAS) AF: 0.00 AC: 0 AN: 86258

European-Finnish (FIN) AF: 0.0000187 AC: 1 AN: 53416

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5768

European-Non Finnish (NFE) AF: 0.0000171 AC: 19 AN: 1112010

Other (OTH) AF: 0.00 AC: 0 AN: 60396

GnomAD4 genome Cov.: 32

Alfa AF: 0.0000434 Hom.: 0

Bravo AF: 0.00000756

ExAC AF: 0.0000412 AC: 5

EpiCase AF: 0.0000545

EpiControl AF: 0.0000593

ClinVar

ClinVar submissions

Significance: Uncertain significance

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
-	1	-	not specified (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.095
BayesDel_addAF	Benign	-0.23	T
BayesDel_noAF	Benign	-0.22
CADD	Benign	15
DANN	Benign	0.93
DEOGEN2	Benign	0.087	T
Eigen	Benign	-0.68
Eigen_PC	Benign	-0.63
FATHMM_MKL	Benign	0.060	N
LIST_S2	Benign	0.76	T
M_CAP	Uncertain	0.094	D
MetaRNN	Benign	0.033	T
MetaSVM	Uncertain	-0.15	T
MutationAssessor	Benign	0.46	N
PhyloP100		-0.071
PrimateAI	Benign	0.47	T
PROVEAN	Benign	-1.5	N
REVEL	Uncertain	0.32
Sift	Benign	0.18	T
Sift4G	Benign	0.63	T
Polyphen		0.0	B
Vest4		0.13
MutPred		0.29		Gain of disorder (P = 0.2161)
MVP		0.69
MPC		0.24
ClinPred		0.021	T
GERP RS		0.94
Varity_R		0.12
gMVP		0.81
Mutation Taster		=92/8	polymorphism

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.010		Details are displayed if max score is > 0.2

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

Other links and lift over

dbSNP: rs559662958; hg19: chr19-49573471;