8-125057574-C-G

Variant names:

• chr8-125057574-C-G
• rs80338866
• NM_014846.4:c.1857G>C

Variant summary

Our verdict is Pathogenic. The variant received 14 ACMG points: 14P and 0B. PM1 PM2 PP3_Moderate PP5_Very_Strong

The NM_014846.4(WASHC5):​c.1857G>C​(p.Leu619Phe) variant causes a missense 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 (★★). Another nucleotide change resulting in the same amino acid substitution has been previously reported as Uncertain significance in ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. L619V) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 32)
• Consequence: WASHC5 NM_014846.4 missense
• Clinical Significance: Pathogenic criteria provided, multiple submitters, no conflicts P:3
• Conservation: PhyloP100: 2.53
• Publications: 11 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: Pathogenic. The variant received 14 ACMG points.

• PM1: In a hotspot region, there are 3 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 0 benign, 6 uncertain in NM_014846.4
• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.937
• PP5: Variant 8-125057574-C-G is Pathogenic according to our data. Variant chr8-125057574-C-G is described in ClinVar as Pathogenic. ClinVar VariationId is 1162.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

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.1857G>C	p.Leu619Phe	missense	Exon 15 of 29	NP_055661.3
	WASHC5	NM_001330609.2		c.1413G>C	p.Leu471Phe	missense	Exon 14 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.1857G>C	p.Leu619Phe	missense	Exon 15 of 29	ENSP00000318016.7	Q12768
	WASHC5	ENST00000920325.1		c.1905G>C	p.Leu635Phe	missense	Exon 15 of 29	ENSP00000590384.1
	WASHC5	ENST00000890504.1		c.1857G>C	p.Leu619Phe	missense	Exon 16 of 30	ENSP00000560563.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 30

GnomAD4 genome Cov.: 32

ClinVar

ClinVar submissions

Significance: Pathogenic

Revision: criteria provided, multiple submitters, no conflicts

Pathogenic	VUS	Benign	Condition
2	-	-	Hereditary spastic paraplegia 8 (2)
1	-	-	Ritscher-Schinzel syndrome;C1863704:Hereditary spastic paraplegia 8 (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.97
BayesDel_addAF	Pathogenic	0.46	D
BayesDel_noAF	Pathogenic	0.42
CADD	Benign	23
DANN	Uncertain	1.0
DEOGEN2	Pathogenic	0.89	D
Eigen	Uncertain	0.43
Eigen_PC	Uncertain	0.45
FATHMM_MKL	Uncertain	0.96	D
LIST_S2	Pathogenic	0.98	D
M_CAP	Uncertain	0.14	D
MetaRNN	Pathogenic	0.94	D
MetaSVM	Uncertain	-0.059	T
PhyloP100		2.5
PrimateAI	Pathogenic	0.87	D
PROVEAN	Uncertain	-3.9	D
REVEL	Pathogenic	0.86
Sift	Pathogenic	0.0	D
Sift4G	Pathogenic	0.0	D
Polyphen		1.0	D
Vest4		0.88
MutPred		0.84		Loss of helix (P = 0.1706)
MVP		0.93
MPC		0.92
ClinPred		1.0	D
GERP RS		4.8
Varity_R		0.83
gMVP		0.79
Mutation Taster		=0/100	disease causing (ClinVar)

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.050		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: rs80338866; hg19: chr8-126069816;