chr1-196258374-G-A
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Variant summary
Our verdict is Uncertain significance. Variant got 3 ACMG points: 3P and 0B. PM2PP3
The NM_198503.5(KCNT2):c.3031C>T(p.Arg1011Trp) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000205 in 1,461,798 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).
Frequency
Genomes: not found (cov: 32)
Exomes 𝑓: 0.0000021 ( 0 hom. )
Consequence
KCNT2
NM_198503.5 missense
NM_198503.5 missense
Scores
7
8
4
Clinical Significance
Conservation
PhyloP100: 1.11
Genes affected
KCNT2 (HGNC:18866): (potassium sodium-activated channel subfamily T member 2) Enables chloride-activated potassium channel activity. Involved in potassium ion export across plasma membrane. Located in plasma membrane. Implicated in developmental and epileptic encephalopathy 57. [provided by Alliance of Genome Resources, Apr 2022]
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ACMG classification
Classification made for transcript
Verdict is Uncertain_significance. Variant got 3 ACMG points.
PM2
Very rare variant in population databases, with high coverage;
PP3
MetaRNN computational evidence supports a deleterious effect, 0.779
Transcripts
RefSeq
Ensembl
Frequencies
GnomAD3 genomes Cov.: 32
GnomAD3 genomes
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32
GnomAD3 exomes AF: 0.00000398 AC: 1AN: 250966Hom.: 0 AF XY: 0.00 AC XY: 0AN XY: 135618
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GnomAD4 exome AF: 0.00000205 AC: 3AN: 1461798Hom.: 0 Cov.: 31 AF XY: 0.00000275 AC XY: 2AN XY: 727190
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GnomAD4 genome Cov.: 32
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32
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ClinVar
Significance: Uncertain significance
Submissions summary: Uncertain:1
Revision: criteria provided, single submitter
LINK: link
Submissions by phenotype
Inborn genetic diseases Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | Ambry Genetics | Jul 30, 2024 | The c.3031C>T (p.R1011W) alteration is located in exon 26 (coding exon 26) of the KCNT2 gene. This alteration results from a C to T substitution at nucleotide position 3031, causing the arginine (R) at amino acid position 1011 to be replaced by a tryptophan (W). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. - |
Computational scores
Source:
Name
Calibrated prediction
Score
Prediction
AlphaMissense
Pathogenic
BayesDel_addAF
Pathogenic
D
BayesDel_noAF
Uncertain
CADD
Uncertain
DANN
Pathogenic
DEOGEN2
Benign
.;.;T
Eigen
Uncertain
Eigen_PC
Benign
FATHMM_MKL
Uncertain
D
LIST_S2
Pathogenic
D;D;D
M_CAP
Uncertain
D
MetaRNN
Pathogenic
D;D;D
MetaSVM
Benign
T
MutationAssessor
Uncertain
.;.;M
PrimateAI
Pathogenic
D
PROVEAN
Uncertain
D;.;D
REVEL
Uncertain
Sift
Uncertain
D;.;D
Sift4G
Pathogenic
D;D;D
Polyphen
D;D;D
Vest4
MutPred
0.40
.;.;Loss of MoRF binding (P = 0.1068);
MVP
MPC
1.2
ClinPred
D
GERP RS
Varity_R
gMVP
Splicing
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SpliceAI score (max)
Details are displayed if max score is > 0.2
Find out detailed SpliceAI scores and Pangolin per-transcript scores at