17-1725291-G-C

Variant summary

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

The NM_001163809.2(WDR81):c.332G>C(p.Arg111Pro) 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: 33)
• Consequence: WDR81 NM_001163809.2 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 4.63

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]

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
WDR81	NM_001163809.2	c.332G>C	p.Arg111Pro	missense_variant	1/10	ENST00000409644.6

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
WDR81	ENST00000409644.6	c.332G>C	p.Arg111Pro	missense_variant	1/10	1	NM_001163809.2	P1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 76

GnomAD4 genome Cov.: 33

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Inborn genetic diseases Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Nov 15, 2023

The c.332G>C (p.R111P) alteration is located in exon 1 (coding exon 1) of the WDR81 gene. This alteration results from a G to C substitution at nucleotide position 332, causing the arginine (R) at amino acid position 111 to be replaced by a proline (P). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.60
BayesDel_addAF	Uncertain	0.050	T
BayesDel_noAF	Benign	-0.17
Cadd	Uncertain	23
Dann	Uncertain	0.99
DEOGEN2	Benign	0.021	T
Eigen	Uncertain	0.22
Eigen_PC	Uncertain	0.27
FATHMM_MKL	Uncertain	0.87	D
LIST_S2	Benign	0.79	T
M_CAP	Benign	0.059	D
MetaRNN	Uncertain	0.42	T
MetaSVM	Benign	-0.66	T
MutationAssessor	Benign	0.81	L
MutationTaster	Benign	0.96	D;D;D;D;D
PrimateAI	Uncertain	0.70	T
PROVEAN	Benign	-1.4	N
REVEL	Benign	0.12
Sift	Benign	0.21	T
Sift4G	Benign	0.069	T
Vest4		0.62
MutPred		0.36		Loss of MoRF binding (P = 0.0072);
MVP		0.61
MPC		1.1
ClinPred		0.86	D
GERP RS		3.9
Varity_R		0.38
gMVP		0.86

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: chr17-1628585;