chr21-42850129-G-A

Position:

• chr21-42850129-G-A

Variant summary

Our verdict is Likely pathogenic. Variant got 6 ACMG points: 6P and 0B. PVS1_Moderate PM2 PP5_Moderate

The NM_018669.6(WDR4):​c.1159C>T​(p.Gln387Ter) variant causes a stop gained change involving the alteration of a non-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 (★).

• Frequency: Genomes: not found (cov: 33)
• Consequence: WDR4 NM_018669.6 stop_gained
• Clinical Significance: Pathogenic criteria provided, single submitter P:1
• Conservation: PhyloP100: -0.0650

Genes affected

WDR4 (HGNC:12756): (WD repeat domain 4) This gene encodes a member of the WD repeat protein family. WD repeats are minimally conserved regions of approximately 40 amino acids typically bracketed by gly-his and trp-asp (GH-WD), which may facilitate formation of heterotrimeric or multiprotein complexes. Members of this family are involved in a variety of cellular processes, including cell cycle progression, signal transduction, apoptosis, and gene regulation. This gene is excluded as a candidate for a form of nonsyndromic deafness (DFNB10), but is still a candidate for other disorders mapped to 21q22.3 as well as for the development of Down syndrome phenotypes. Alternatively spliced transcript variants have been found for this gene. [provided by RefSeq, May 2012]

ACMG classification

Verdict is Likely_pathogenic. Variant got 6 ACMG points.

• PVS1: Loss of function variant, product does not undergo nonsense mediated mRNA decay. Variant is located in the 3'-most exon, not predicted to undergo nonsense mediated mRNA decay. Fraction of 0.0646 CDS is truncated, and there are 1 pathogenic variants in the truncated region.
• PM2: Very rare variant in population databases, with high coverage
• PP5: Variant 21-42850129-G-A is Pathogenic according to our data. Variant chr21-42850129-G-A is described in ClinVar as [Pathogenic]. Clinvar id is 2130364.Status of the report is criteria_provided_single_submitter, 1 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
WDR4	NM_018669.6	c.1159C>T	p.Gln387Ter	stop_gained	11/11	ENST00000398208.3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
WDR4	ENST00000398208.3	c.1159C>T	p.Gln387Ter	stop_gained	11/11	1	NM_018669.6	P1
WDR4	ENST00000330317.6	c.1159C>T	p.Gln387Ter	stop_gained	11/12	1		P1
WDR4	ENST00000476326.5	n.1074C>T		non_coding_transcript_exon_variant	11/11	1
WDR4	ENST00000492742.5	n.1302C>T		non_coding_transcript_exon_variant	11/11	2

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 33

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:1

Revision: criteria provided, single submitter

Submissions by phenotype

not provided Pathogenic:1

Pathogenic, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Apr 27, 2022

This sequence change creates a premature translational stop signal (p.Gln387*) in the WDR4 gene. It is expected to result in an absent or disrupted protein product. Loss-of-function variants in WDR4 are known to be pathogenic (PMID: 29597095, 30079490). This variant is not present in population databases (gnomAD no frequency). This variant has not been reported in the literature in individuals affected with WDR4-related conditions. For these reasons, this variant has been classified as Pathogenic. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Pathogenic	0.19	D
BayesDel_noAF	Uncertain	0.040
CADD	Pathogenic	35
DANN	Benign	0.83
Eigen	Benign	-0.50
Eigen_PC	Benign	-0.83
FATHMM_MKL	Benign	0.65	D
MutationTaster	Benign	1.0	A;D
Vest4		0.066
GERP RS		-2.3
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7

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: chr21-44270239; COSMIC: COSV57732503; COSMIC: COSV57732503;