8-125043881-A-T

Position:

• chr8-125043881-A-T

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_014846.4(WASHC5):​c.2794T>A​(p.Ser932Thr) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000479 in 1,460,794 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 14/20 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★).

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 0.0000048 (0 hom.)
• Consequence: WASHC5 NM_014846.4 missense
• Clinical Significance: Uncertain significance criteria provided, multiple submitters, no conflicts U:2
• Conservation: PhyloP100: 2.81

Genes affected

WASHC5 (HGNC:28984): (WASH complex subunit 5) This gene encodes a 134 kDa protein named strumpellin that is predicted to have multiple transmembrane domains and a spectrin-repeat-containing domain. This ubiquitously expressed gene has its highest expression in skeletal muscle. The protein is named for Strumpell disease; a form of hereditary spastic paraplegia (HSP). Spastic paraplegias are a diverse group of disorders in which the autosomal dominant forms are characterized by progressive, lower extremity spasticity caused by axonal degeneration in the terminal portions of the longest descending and ascending corticospinal tracts. More than 30 loci (SPG1-33) have been implicated in hereditary spastic paraplegia diseases. [provided by RefSeq, Aug 2009]

WASHC5-AS1 (HGNC:43440): (WASHC5 antisense RNA 1)

ACMG classification

Verdict is Uncertain_significance. Variant got 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.17994818).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
WASHC5	NM_014846.4	c.2794T>A	p.Ser932Thr	missense_variant	23/29	ENST00000318410.12
WASHC5-AS1	NR_170219.1	n.97-618A>T		intron_variant, non_coding_transcript_variant

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
WASHC5	ENST00000318410.12	c.2794T>A	p.Ser932Thr	missense_variant	23/29	1	NM_014846.4	P1
WASHC5-AS1	ENST00000519140.1	n.97-618A>T		intron_variant, non_coding_transcript_variant		4
WASHC5	ENST00000517845.5	c.2350T>A	p.Ser784Thr	missense_variant	21/27	2

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD3 exomes AF: 0.00000398 AC: 1 AN: 251246 Hom.: 0 AF XY: 0.00000736 AC XY: 1 AN XY: 135806

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00000880

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000479 AC: 7 AN: 1460794 Hom.: 0 Cov.: 30 AF XY: 0.00000550 AC XY: 4 AN XY: 726794

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00000630

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 33

Bravo AF: 0.00000378

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

Ritscher-Schinzel syndrome;C1863704:Hereditary spastic paraplegia 8 Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Mar 30, 2023

In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. Algorithms developed to predict the effect of sequence changes on RNA splicing suggest that this variant may disrupt the consensus splice site. Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is not expected to disrupt WASHC5 protein function. This variant has not been reported in the literature in individuals affected with WASHC5-related conditions. This variant is present in population databases (no rsID available, gnomAD 0.0009%). This sequence change replaces serine, which is neutral and polar, with threonine, which is neutral and polar, at codon 932 of the WASHC5 protein (p.Ser932Thr). -

not provided Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

CeGaT Center for Human Genetics Tuebingen

Mar 01, 2022

WASHC5: PM2 -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.066
BayesDel_addAF	Benign	-0.022	T
BayesDel_noAF	Benign	-0.27
CADD	Benign	16
DANN	Benign	0.86
DEOGEN2	Benign	0.29	T;.
Eigen	Benign	-0.39
Eigen_PC	Benign	-0.17
FATHMM_MKL	Uncertain	0.87	D
LIST_S2	Benign	0.71	T;T
M_CAP	Benign	0.032	D
MetaRNN	Benign	0.18	T;T
MetaSVM	Benign	-0.62	T
MutationTaster	Benign	0.86	D;D
PrimateAI	Uncertain	0.51	T
PROVEAN	Benign	-0.37	N;N
REVEL	Benign	0.19
Sift	Benign	0.63	T;T
Sift4G	Benign	0.65	T;T
Polyphen		0.011	B;B
Vest4		0.24
MutPred		0.53		Loss of glycosylation at S932 (P = 0.0575);.;
MVP		0.68
MPC		0.22
ClinPred		0.25	T
GERP RS		4.5
Varity_R		0.097
gMVP		0.20

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: rs1296605223; hg19: chr8-126056123;