rs132630292

Variant names:

• chrX-103786707-G-A
• rs132630292
• NM_000533.5:c.434G>A

Variant summary

Our verdict is Pathogenic. The variant received 18 ACMG points: 18P and 0B. PVS1 PM2 PP5_Very_Strong

The NM_000533.5(PLP1):​c.434G>A​(p.Trp145*) variant causes a stop gained change. 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 Likely pathogenic (★★). Variant results in nonsense mediated mRNA decay.

• Frequency: Genomes: not found (cov: 22)
• Consequence: PLP1 NM_000533.5 stop_gained
• Clinical Significance: Pathogenic/Likely pathogenic criteria provided, multiple submitters, no conflicts P:3
• Conservation: PhyloP100: 6.58
• Publications: 6 publications found

Genes affected

PLP1 (HGNC:9086): (proteolipid protein 1) This gene encodes a transmembrane proteolipid protein that is the predominant component of myelin. The encoded protein may play a role in the compaction, stabilization, and maintenance of myelin sheaths, as well as in oligodendrocyte development and axonal survival. Mutations in this gene cause Pelizaeus-Merzbacher disease and spastic paraplegia type 2. Alternatively splicing results in multiple transcript variants, including the DM20 splice variant. [provided by RefSeq, Feb 2015]

ENSG00000288597 (HGNC:):

RAB9B (HGNC:14090): (RAB9B, member RAS oncogene family) This gene encodes a member of a subfamily of RAS small guanosine triphosphate (GTP)-binding proteins that regulate membrane trafficking. The encoded protein may be involved in endosome-to-Golgi transport. [provided by RefSeq, Jan 2010]

ACMG classification

Our verdict: Pathogenic. The variant received 18 ACMG points.

• PVS1: Loss of function variant, product undergoes nonsense mediated mRNA decay. LoF is a known mechanism of disease.
• PM2: Very rare variant in population databases, with high coverage
• PP5: Variant X-103786707-G-A is Pathogenic according to our data. Variant chrX-103786707-G-A is described in ClinVar as Pathogenic/Likely_pathogenic. ClinVar VariationId is 11090.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_000533.5. 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
	PLP1	NM_000533.5	MANE Select	c.434G>A	p.Trp145*	stop_gained	Exon 3 of 7	NP_000524.3
	PLP1	NM_001128834.3		c.434G>A	p.Trp145*	stop_gained	Exon 4 of 8	NP_001122306.1	A8K9L3
	PLP1	NM_001305004.1		c.269G>A	p.Trp90*	stop_gained	Exon 3 of 7	NP_001291933.1	B4DI30

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	PLP1	ENST00000621218.5	TSL:1 MANE Select	c.434G>A	p.Trp145*	stop_gained	Exon 3 of 7	ENSP00000484450.1	P60201-1
	PLP1	ENST00000619236.1	TSL:1	c.348+86G>A		intron	N/A	ENSP00000477619.1	P60201-2
	PLP1	ENST00000867712.1		c.476G>A	p.Trp159*	stop_gained	Exon 4 of 8	ENSP00000537771.1

Frequencies

GnomAD3 genomes Cov.: 22

GnomAD4 exome Cov.: 30

GnomAD4 genome Cov.: 22

Alfa AF: 0.00 Hom.: 0

ClinVar

ClinVar submissions

Significance: Pathogenic/Likely pathogenic

Revision: criteria provided, multiple submitters, no conflicts

Pathogenic	VUS	Benign	Condition
1	-	-	Hereditary spastic paraplegia 2 (1)
1	-	-	Pelizaeus-Merzbacher disease (1)
1	-	-	Pelizaeus-Merzbacher disease, atypical (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Pathogenic	0.72	D
BayesDel_noAF	Pathogenic	0.60
CADD	Pathogenic	40
DANN	Uncertain	0.99
FATHMM_MKL	Pathogenic	0.98	D
PhyloP100		6.6
Vest4		0.99
GERP RS		4.9
Mutation Taster		=0/200	disease causing (ClinVar)

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.10		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: rs132630292; hg19: chrX-103041636; COSMIC: COSV100393224; COSMIC: COSV100393224;