8-125024658-C-T

Variant names:

• chr8-125024658-C-T
• rs1815322209
• NM_014846.4:c.3439G>A

Variant summary

Our verdict is Uncertain significance. The variant received 3 ACMG points: 3P and 0B. PM2 PP3

The NM_014846.4(WASHC5):​c.3439G>A​(p.Val1147Met) 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 Uncertain significance (★★). Synonymous variant affecting the same amino acid position (i.e. V1147V) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 32)
• Consequence: WASHC5 NM_014846.4 missense
• Clinical Significance: Uncertain significance criteria provided, multiple submitters, no conflicts U:2
• Conservation: PhyloP100: 7.73
• Publications: 0 publications found

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 Gene-Disease associations (from GenCC):

• Ritscher-Schinzel syndrome 1

  Inheritance: AR Classification: STRONG, LIMITED Submitted by: G2P, ClinGen, Labcorp Genetics (formerly Invitae), Genomics England PanelApp
• hereditary spastic paraplegia 8

  Inheritance: AD Classification: MODERATE, SUPPORTIVE Submitted by: ClinGen, Orphanet
• Ritscher-Schinzel syndrome

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

Our verdict: Uncertain_significance. The variant received 3 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.764

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_014846.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	WASHC5	NM_014846.4	MANE Select	c.3439G>A	p.Val1147Met	missense	Exon 29 of 29	NP_055661.3
	WASHC5	NM_001330609.2		c.2995G>A	p.Val999Met	missense	Exon 28 of 28	NP_001317538.1	E7EQI7

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	WASHC5	ENST00000318410.12	TSL:1 MANE Select	c.3439G>A	p.Val1147Met	missense	Exon 29 of 29	ENSP00000318016.7	Q12768
	WASHC5	ENST00000920325.1		c.3487G>A	p.Val1163Met	missense	Exon 29 of 29	ENSP00000590384.1
	WASHC5	ENST00000890504.1		c.3439G>A	p.Val1147Met	missense	Exon 30 of 30	ENSP00000560563.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 27

GnomAD4 genome Cov.: 32

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.00000378

ClinVar

ClinVar submissions

Significance: Uncertain significance

Revision: criteria provided, multiple submitters, no conflicts

Pathogenic	VUS	Benign	Condition
-	1	-	Inborn genetic diseases (1)
-	1	-	not provided (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Uncertain	0.44
BayesDel_addAF	Pathogenic	0.34	D
BayesDel_noAF	Pathogenic	0.25
CADD	Pathogenic	27
DANN	Uncertain	1.0
DEOGEN2	Benign	0.17	T
Eigen	Pathogenic	0.78
Eigen_PC	Pathogenic	0.79
FATHMM_MKL	Pathogenic	0.98	D
LIST_S2	Uncertain	0.96	D
M_CAP	Uncertain	0.16	D
MetaRNN	Pathogenic	0.76	D
MetaSVM	Uncertain	0.67	D
PhyloP100		7.7
PrimateAI	Pathogenic	0.88	D
PROVEAN	Benign	-1.7	N
REVEL	Pathogenic	0.77
Sift	Uncertain	0.0040	D
Sift4G	Uncertain	0.010	D
Polyphen		0.99	D
Vest4		0.77
MutPred		0.54		Gain of catalytic residue at V1147 (P = 0.0363)
MVP		0.94
MPC		0.62
ClinPred		0.91	D
GERP RS		5.7
Varity_R		0.32
gMVP		0.59
Mutation Taster		=61/39	polymorphism

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.010		Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Other links and lift over

dbSNP: rs1815322209; hg19: chr8-126036900;