chr19-50320313-C-T

Variant names:

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 0P and 2B. BP4_Moderate

The NM_004977.3(KCNC3):c.2207G>A(p.Arg736His) variant causes a missense change involving the alteration of a non-conserved nucleotide. 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 Uncertain significance (★).

Frequency

Genomes: 𝑓 0.0000090 ( 0 hom., cov: 16)

Exomes 𝑓: 0.0000059 ( 0 hom. )

Consequence

KCNC3
NM_004977.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 0.277

Variant links:

Genes affected

KCNC3 (HGNC:6235): (potassium voltage-gated channel subfamily C member 3) The Shaker gene family of Drosophila encodes components of voltage-gated potassium channels and is comprised of four subfamilies. Based on sequence similarity, this gene is similar to one of these subfamilies, namely the Shaw subfamily. The protein encoded by this gene belongs to the delayed rectifier class of channel proteins and is an integral membrane protein that mediates the voltage-dependent potassium ion permeability of excitable membranes. Alternate splicing results in several transcript variants. [provided by RefSeq, Mar 2014]

KCNC3 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -2 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.15405214).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
KCNC3	NM_004977.3 link	c.2207G>A	p.Arg736His	missense_variant	Exon 4 of 5	ENST00000477616.2	NP_004968.2	Q14003
KCNC3	NM_001372305.1 link	c.1979G>A	p.Arg660His	missense_variant	Exon 4 of 5		NP_001359234.1
KCNC3	NR_110912.2 link	n.260+280G>A		intron_variant	Intron 2 of 3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
KCNC3	ENST00000477616.2 link	c.2207G>A	p.Arg736His	missense_variant	Exon 4 of 5	1	NM_004977.3	ENSP00000434241.1	Q14003
KCNC3	ENST00000670667.1 link	c.2170+280G>A		intron_variant	Intron 3 of 3			ENSP00000499301.1	A0A590UJ62
KCNC3	ENST00000376959.6 link	c.2170+280G>A		intron_variant	Intron 3 of 4	5		ENSP00000366158.2	E7ETH1
KCNC3	ENST00000474951.1 link	c.118+280G>A		intron_variant	Intron 2 of 3	2		ENSP00000432438.1	E9PQY4

Frequencies

GnomAD3 genomes

AF:

0.00000905

AC:

AN:

110488

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.000264

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000585

AC:

AN:

51290

Hom.:

AF XY:

0.0000381

AC XY:

AN XY:

26248

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.000116

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.000146

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000508

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000587

AC:

AN:

681968

Hom.:

Cov.:

AF XY:

0.00000295

AC XY:

AN XY:

339552

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.0000601

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.0000336

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.0000340

Gnomad4 NFE exome

AF:

0.00000201

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.00000905

AC:

AN:

110504

Hom.:

Cov.:

AF XY:

0.0000196

AC XY:

AN XY:

50952

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.000265

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Apr 23, 2024

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

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Variant summary: KCNC3 c.2207G>A (p.Arg736His) results in a non-conservative amino acid change in the encoded protein sequence. Three of four in-silico tools predict a benign effect of the variant on protein function. The variant allele was found at a frequency of 5.8e-05 in 51290 control chromosomes. The available data on variant occurrences in the general population are insufficient to allow any conclusion about variant significance. To our knowledge, no occurrence of c.2207G>A in individuals affected with Spinocerebellar Ataxia Type 13 and no experimental evidence demonstrating its impact on protein function have been reported. No submitters have cited clinical-significance assessments for this variant to ClinVar. Based on the evidence outlined above, the variant was classified as uncertain significance. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.16

BayesDel_addAF

Benign

0.0075

BayesDel_noAF

Benign

-0.23

CADD

Benign

DANN

Uncertain

0.98

DEOGEN2

Benign

0.10

Eigen

Benign

-0.93

Eigen_PC

Benign

-0.81

FATHMM_MKL

Benign

0.15

LIST_S2

Benign

0.47

M_CAP

Pathogenic

0.73

MetaRNN

Benign

0.15

MetaSVM

Uncertain

-0.062

MutationAssessor

Benign

0.0

PrimateAI

Pathogenic

0.86

PROVEAN

Benign

-0.49

REVEL

Uncertain

0.35

Sift

Benign

0.35

Sift4G

Benign

0.14

Polyphen

0.0

Vest4

0.13

MutPred

0.16

Loss of solvent accessibility (P = 0.0674);

MVP

0.64

ClinPred

0.036

GERP RS

-0.15

Varity_R

0.025

gMVP

0.12

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.050

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