17-1726836-C-T

Position:

• chr17-1726836-C-T

Variant summary

Our verdict is Benign. Variant got -20 ACMG points: 0P and 20B. BP4_Strong BP6_Very_Strong BS1 BS2

The NM_001163809.2(WDR81):​c.1877C>T​(p.Pro626Leu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00068 in 1,550,060 control chromosomes in the GnomAD database, including 9 homozygotes. In-silico tool predicts a benign outcome for this variant. 15/20 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★).

• Frequency:
  • Genomes: 𝑓 0.0037 (4 hom., cov: 33)
  • Exomes 𝑓: 0.00036 (5 hom.)
• Consequence: WDR81 NM_001163809.2 missense
• Clinical Significance: Benign/Likely benign criteria provided, multiple submitters, no conflicts B:4
• Conservation: PhyloP100: -0.0230

Genes affected

WDR81 (HGNC:26600): (WD repeat domain 81) This gene encodes a multi-domain transmembrane protein which is predominantly expressed in the brain and is thought to play a role in endolysosomal trafficking. Mutations in this gene are associated with an autosomal recessive form of a syndrome exhibiting cerebellar ataxia, cognitive disability, and disequilibrium (CAMRQ2). Alternatively spliced transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Jul 2017]

(HGNC:):

ACMG classification

Verdict is Benign. Variant got -20 ACMG points.

• BP4: Computational evidence support a benign effect (MetaRNN=0.003655374).
• BP6: Variant 17-1726836-C-T is Benign according to our data. Variant chr17-1726836-C-T is described in ClinVar as [Likely_benign]. Clinvar id is 377023.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr17-1726836-C-T is described in Lovd as [Benign].
• BS1: Variant frequency is greater than expected in population afr. gnomad4 allele frequency = 0.00366 (557/152320) while in subpopulation AFR AF= 0.0129 (536/41574). AF 95% confidence interval is 0.012. There are 4 homozygotes in gnomad4. There are 261 alleles in male gnomad4 subpopulation. Median coverage is 33. This position pass quality control queck.
• BS2: High Homozygotes in GnomAd4 at 4 AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
WDR81	NM_001163809.2	c.1877C>T	p.Pro626Leu	missense_variant	1/10	ENST00000409644.6	NP_001157281.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
WDR81	ENST00000409644.6	c.1877C>T	p.Pro626Leu	missense_variant	1/10	1	NM_001163809.2	ENSP00000386609	P1
	ENST00000576540.1	n.296-925G>A		intron_variant, non_coding_transcript_variant		3

Frequencies

GnomAD3 genomes AF: 0.00360 AC: 548 AN: 152202 Hom.: 3 Cov.: 33

Gnomad AFR AF: 0.0127

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.000917

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.000207

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.0000294

Gnomad OTH AF: 0.00239

GnomAD3 exomes AF: 0.000844 AC: 129 AN: 152830 Hom.: 1 AF XY: 0.000614 AC XY: 50 AN XY: 81496

Gnomad AFR exome AF: 0.0139

Gnomad AMR exome AF: 0.000690

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.0000440

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.0000340

Gnomad OTH exome AF: 0.000694

GnomAD4 exome AF: 0.000356 AC: 497 AN: 1397740 Hom.: 5 Cov.: 48 AF XY: 0.000308 AC XY: 212 AN XY: 689360

Gnomad4 AFR exome AF: 0.0128

Gnomad4 AMR exome AF: 0.000840

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.0000631

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00000742

Gnomad4 OTH exome AF: 0.000759

GnomAD4 genome AF: 0.00366 AC: 557 AN: 152320 Hom.: 4 Cov.: 33 AF XY: 0.00350 AC XY: 261 AN XY: 74490

Gnomad4 AFR AF: 0.0129

Gnomad4 AMR AF: 0.000916

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.00

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.0000294

Gnomad4 OTH AF: 0.00237

Alfa AF: 0.000862 Hom.: 1

Bravo AF: 0.00403

ExAC AF: 0.00131 AC: 33

Asia WGS AF: 0.000866 AC: 3 AN: 3478

ClinVar

Significance: Benign/Likely benign

Submissions summary: Benign:4

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

not provided Benign:4

Benign, criteria provided, single submitter	clinical testing	CeGaT Center for Human Genetics Tuebingen	Sep 01, 2023	WDR81: BP4, BS1, BS2 -
Likely benign, criteria provided, single submitter	clinical testing	Center for Pediatric Genomic Medicine, Children's Mercy Hospital and Clinics	Jan 05, 2017	- -
Benign, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Dec 31, 2019	- -
Likely benign, criteria provided, single submitter	not provided	Breakthrough Genomics, Breakthrough Genomics	-	- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.084
BayesDel_addAF	Benign	-0.65	T
BayesDel_noAF	Benign	-0.69
CADD	Benign	1.1
DANN	Benign	0.74
DEOGEN2	Benign	0.018	T
Eigen	Benign	-1.2
Eigen_PC	Benign	-1.3
FATHMM_MKL	Benign	0.026	N
LIST_S2	Benign	0.42	T
MetaRNN	Benign	0.0037	T
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	0.0	N
MutationTaster	Benign	1.0	N;N;N;N;N
PrimateAI	Benign	0.31	T
PROVEAN	Benign	-1.3	N
REVEL	Benign	0.0070
Sift	Benign	0.085	T
Sift4G	Pathogenic	0.0	D
Vest4		0.065
MVP		0.12
MPC		0.40
ClinPred		0.0048	T
GERP RS		-1.3
Varity_R		0.028
gMVP		0.35

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: rs148644987; hg19: chr17-1630130;