19-50320607-C-A

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PM2

The NM_004977.3(KCNC3):c.2156G>T(p.Gly719Val) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 30)
• Consequence: KCNC3 NM_004977.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 3.64

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]

ACMG classification

Verdict is Uncertain_significance. Variant got 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
KCNC3	NM_004977.3	c.2156G>T	p.Gly719Val	missense_variant	3/5	ENST00000477616.2
KCNC3	NM_001372305.1	c.1928G>T	p.Gly643Val	missense_variant	3/5
KCNC3	NR_110912.2	n.246G>T		non_coding_transcript_exon_variant	2/4

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
KCNC3	ENST00000477616.2	c.2156G>T	p.Gly719Val	missense_variant	3/5	1	NM_004977.3
KCNC3	ENST00000670667.1	c.2156G>T	p.Gly719Val	missense_variant	3/4			P3
KCNC3	ENST00000376959.6	c.2156G>T	p.Gly719Val	missense_variant	3/5	5		A2
KCNC3	ENST00000474951.1	c.104G>T	p.Gly35Val	missense_variant	2/4	2

Frequencies

GnomAD3 genomes Cov.: 30

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 30

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not provided Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

GeneDx

Aug 27, 2019

Not observed in large population cohorts (Lek et al., 2016); In silico analysis, which includes protein predictors and evolutionary conservation, supports a deleterious effect; Has not been previously published as pathogenic or benign to our knowledge -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Uncertain	0.52
BayesDel_addAF	Pathogenic	0.24	D
BayesDel_noAF	Uncertain	0.10
Cadd	Uncertain	24
Dann	Uncertain	0.99
DEOGEN2	Benign	0.32	T;.;D
Eigen	Uncertain	0.26
Eigen_PC	Benign	0.21
FATHMM_MKL	Uncertain	0.92	D
LIST_S2	Benign	0.83	T;T;T
M_CAP	Pathogenic	0.69	D
MetaRNN	Uncertain	0.58	D;D;D
MetaSVM	Pathogenic	0.90	D
MutationTaster	Benign	1.0	D;D;D;N
PrimateAI	Pathogenic	0.90	D
PROVEAN	Pathogenic	-4.6	D;D;D
REVEL	Uncertain	0.62
Sift	Uncertain	0.0010	D;D;D
Sift4G	Uncertain	0.0030	D;D;D
Polyphen		0.96	D;.;D
Vest4		0.51
MutPred		0.20		Loss of catalytic residue at P715 (P = 0.0672);.;Loss of catalytic residue at P715 (P = 0.0672);
MVP		0.88
ClinPred		1.0	D
GERP RS		2.7
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.49
gMVP		0.43

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

No publications associated with this variant yet.

Other links and lift over

hg19: chr19-50823864;