18-26476617-G-T

Position:

• chr18-26476617-G-T

Variant summary

Our verdict is Uncertain significance. Variant got 4 ACMG points: 4P and 0B. PM2 PP3 PP5

The NM_001142730.3(KCTD1):​c.2031C>A​(p.Asp677Glu) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Pathogenic (no stars).

• Frequency: Genomes: not found (cov: 33)
• Consequence: KCTD1 NM_001142730.3 missense
• Clinical Significance: Pathogenic no assertion criteria provided P:1
• Conservation: PhyloP100: 7.70

Genes affected

KCTD1 (HGNC:18249): (potassium channel tetramerization domain containing 1) This gene encodes a protein containing a BTB (Broad-complex, tramtrack and bric a brac), also known as a POZ (POxvirus and zinc finger) protein-protein interaction domain. The encoded protein negatively regulates the AP-2 family of transcription factors and the Wnt signaling pathway. A mechanism for the modulation of Wnt signaling has been proposed in which the encoded protein enhances ubiquitination and degradation of the beta-catenin protein. Mutations in this gene have been identified in Scalp-ear-nipple (SEN) syndrome. [provided by RefSeq, May 2017]

ACMG classification

Verdict is Uncertain_significance. Variant got 4 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.837
• PP5: Variant 18-26476617-G-T is Pathogenic according to our data. Variant chr18-26476617-G-T is described in ClinVar as [Pathogenic]. Clinvar id is 235827.Status of the report is no_assertion_criteria_provided, 0 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
KCTD1	NM_001142730.3	c.2031C>A	p.Asp677Glu	missense_variant	3/5	ENST00000580059.7	NP_001136202.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
KCTD1	ENST00000580059.7	c.2031C>A	p.Asp677Glu	missense_variant	3/5	3	NM_001142730.3	ENSP00000463041	P1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 30

GnomAD4 genome Cov.: 33

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:1

Revision: no assertion criteria provided

Submissions by phenotype

Scalp-ear-nipple syndrome Pathogenic:1

Pathogenic, no assertion criteria provided

research

University of Washington Center for Mendelian Genomics, University of Washington

Jan 29, 2014

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Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	1.0
BayesDel_addAF	Uncertain	0.12	D
BayesDel_noAF	Uncertain	-0.070
CADD	Pathogenic	26
DANN	Uncertain	1.0
DEOGEN2	Uncertain	0.62	D;D;D;D;.;D;D
Eigen	Pathogenic	0.90
Eigen_PC	Pathogenic	0.90
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Pathogenic	0.99	.;.;D;.;D;D;D
M_CAP	Uncertain	0.15	D
MetaRNN	Pathogenic	0.84	D;D;D;D;D;D;D
MetaSVM	Uncertain	0.26	D
MutationAssessor	Pathogenic	3.1	M;M;M;M;.;.;.
MutationTaster	Benign	1.0	D;D;D;D;D
PrimateAI	Pathogenic	0.86	D
PROVEAN	Uncertain	-3.7	.;.;D;D;.;.;.
REVEL	Uncertain	0.61
Sift	Uncertain	0.0040	.;.;D;D;.;.;.
Sift4G	Uncertain	0.022	D;D;D;D;.;.;.
Polyphen		0.99	D;D;D;D;.;.;.
Vest4		0.85
MutPred		0.60		Loss of ubiquitination at K72 (P = 0.0755);Loss of ubiquitination at K72 (P = 0.0755);Loss of ubiquitination at K72 (P = 0.0755);Loss of ubiquitination at K72 (P = 0.0755);.;.;Loss of ubiquitination at K72 (P = 0.0755);
MVP		0.72
MPC		1.5
ClinPred		0.99	D
GERP RS		5.8
Varity_R		0.92
gMVP		0.82

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: rs878853124; hg19: chr18-24056581;