rs148550258

chr9-2718019-G-A

Variant summary

Our verdict is Benign. Variant got -10 ACMG points: 2P and 12B. PM2 BP4_Strong BP6_Very_Strong

The NM_133497.4(KCNV2):c.280G>A(p.Ala94Thr) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000806 in 1,613,044 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 14/20 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. A94D) has been classified as Uncertain significance.

• Frequency:
  • Genomes: 𝑓 0.00012 (0 hom., cov: 33)
  • Exomes 𝑓: 0.000077 (0 hom.)
• Consequence: KCNV2 NM_133497.4 missense
• Clinical Significance: Likely benign criteria provided, multiple submitters, no conflicts B:2
• Conservation: PhyloP100: -0.237

Genes affected

KCNV2 (HGNC:19698): (potassium voltage-gated channel modifier subfamily V member 2) Voltage-gated potassium (Kv) 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. This gene encodes a member of the potassium voltage-gated channel subfamily V. This member is identified as a 'silent subunit', and it does not form homomultimers, but forms heteromultimers with several other subfamily members. Through obligatory heteromerization, it exerts a function-altering effect on other potassium channel subunits. This protein is strongly expressed in pancreas and has a weaker expression in several other tissues. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Benign. Variant got -10 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.014576346).
• BP6: Variant 9-2718019-G-A is Benign according to our data. Variant chr9-2718019-G-A is described in ClinVar as [Likely_benign]. Clinvar id is 262362.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
KCNV2	NM_133497.4	c.280G>A	p.Ala94Thr	missense_variant	1/2	ENST00000382082.4

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
KCNV2	ENST00000382082.4	c.280G>A	p.Ala94Thr	missense_variant	1/2	1	NM_133497.4	P1

Frequencies

GnomAD3 genomes AF: 0.000118 AC: 18 AN: 152170 Hom.: 0 Cov.: 33

Gnomad AFR AF: 0.00

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.0000654

Gnomad ASJ AF: 0.00432

Gnomad EAS AF: 0.000193

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.0000942

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.00

Gnomad OTH AF: 0.00

GnomAD3 exomes AF: 0.000138 AC: 34 AN: 246666 Hom.: 0 AF XY: 0.000180 AC XY: 24 AN XY: 133554

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.0000583

Gnomad ASJ exome AF: 0.00302

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00000901

Gnomad OTH exome AF: 0.000165

GnomAD4 exome AF: 0.0000767 AC: 112 AN: 1460874 Hom.: 0 Cov.: 81 AF XY: 0.0000867 AC XY: 63 AN XY: 726638

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.0000897

Gnomad4 ASJ exome AF: 0.00284

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.0000144

Gnomad4 OTH exome AF: 0.000298

GnomAD4 genome AF: 0.000118 AC: 18 AN: 152170 Hom.: 0 Cov.: 33 AF XY: 0.000161 AC XY: 12 AN XY: 74328

Gnomad4 AFR AF: 0.00

Gnomad4 AMR AF: 0.0000654

Gnomad4 ASJ AF: 0.00432

Gnomad4 EAS AF: 0.000193

Gnomad4 SAS AF: 0.00

Gnomad4 FIN AF: 0.0000942

Gnomad4 NFE AF: 0.00

Gnomad4 OTH AF: 0.00

Alfa AF: 0.000199 Hom.: 0

Bravo AF: 0.000136

ESP6500AA AF: 0.00 AC: 0

ESP6500EA AF: 0.000233 AC: 2

ExAC AF: 0.0000742 AC: 9

ClinVar

Significance: Likely benign

Submissions summary: Benign:2

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

not specified Benign:1

Likely benign, criteria provided, single submitter

clinical testing

PreventionGenetics, part of Exact Sciences

-

- -

not provided Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Invitae

Jun 13, 2023

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.068
BayesDel_addAF	Benign	-0.25	T
BayesDel_noAF	Benign	-0.42
Cadd	Benign	0.16
Dann	Benign	0.86
DEOGEN2	Benign	0.055	T
Eigen	Benign	-1.2
Eigen_PC	Benign	-1.2
FATHMM_MKL	Benign	0.079	N
LIST_S2	Benign	0.38	T
M_CAP	Uncertain	0.20	D
MetaRNN	Benign	0.015	T
MetaSVM	Uncertain	-0.20	T
MutationAssessor	Benign	0.46	N
MutationTaster	Benign	1.0	N
PrimateAI	Benign	0.25	T
PROVEAN	Benign	-0.37	N
REVEL	Benign	0.14
Sift	Benign	0.45	T
Sift4G	Benign	0.57	T
Polyphen		0.0	B
Vest4		0.14
MVP		0.65
MPC		0.017
ClinPred		0.042	T
GERP RS		0.16
Varity_R		0.049
gMVP		0.38

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: rs148550258; hg19: chr9-2718019;