1-154926417-G-A

Variant names:

• chr1-154926417-G-A
• NM_006556.4:c.379C>T

Variant summary

Our verdict is Likely pathogenic. Variant got 7 ACMG points: 7P and 0B. PVS1_Strong PM2 PP5

The NM_006556.4(PMVK):​c.379C>T​(p.Gln127*) variant causes a stop gained 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 Likely pathogenic (no stars).

• Frequency: Genomes: not found (cov: 32)
• Consequence: PMVK NM_006556.4 stop_gained
• Clinical Significance: Likely pathogenic no assertion criteria provided P:1
• Conservation: PhyloP100: 3.00

Genes affected

PMVK (HGNC:9141): (phosphomevalonate kinase) This gene encodes a peroxisomal enzyme that is a member of the galactokinase, homoserine kinase, mevalonate kinase, and phosphomevalonate kinase (GHMP) family of ATP-dependent enzymes. The encoded protein catalyzes the conversion of mevalonate 5-phosphate to mevalonate 5-diphosphate, which is the fifth step in the mevalonate pathway of isoprenoid biosynthesis. Mutations in this gene are linked to certain types of porokeratosis including disseminated superficial porokeratosis. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Feb 2017]

ACMG classification

Verdict is Likely_pathogenic. Variant got 7 ACMG points.

• PVS1: Loss of function variant, product does not undergo nonsense mediated mRNA decay. Variant is located in the 3'-most 50 bp of the penultimate exon, not predicted to undergo nonsense mediated mRNA decay. Fraction of 0.345 CDS is truncated, and there are 2 pathogenic variants in the truncated region.
• PM2: Very rare variant in population databases, with high coverage
• PP5: Variant 1-154926417-G-A is Pathogenic according to our data. Variant chr1-154926417-G-A is described in ClinVar as [Likely_pathogenic]. Clinvar id is 1344671.Status of the report is no_assertion_criteria_provided, 0 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
PMVK	NM_006556.4	c.379C>T	p.Gln127*	stop_gained	Exon 4 of 5	ENST00000368467.4	NP_006547.1
PMVK	NM_001323011.3	c.337C>T	p.Gln113*	stop_gained	Exon 4 of 5		NP_001309940.1
PMVK	NM_001323012.3	c.154C>T	p.Gln52*	stop_gained	Exon 4 of 5		NP_001309941.1
PMVK	NM_001348696.2	c.154C>T	p.Gln52*	stop_gained	Exon 4 of 5		NP_001335625.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
PMVK	ENST00000368467.4	c.379C>T	p.Gln127*	stop_gained	Exon 4 of 5	1	NM_006556.4	ENSP00000357452.3

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

ClinVar

Significance: Likely pathogenic

Submissions summary: Pathogenic:1

Revision: no assertion criteria provided

Submissions by phenotype

Linear porokeratosis Pathogenic:1

May 01, 2019

Yale Center for Mendelian Genomics, Yale University

Significance: Likely pathogenic

Review Status: no assertion criteria provided

Collection Method: literature only

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Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Pathogenic	0.60	D
BayesDel_noAF	Pathogenic	0.46
CADD	Pathogenic	36
DANN	Uncertain	0.99
Eigen	Uncertain	0.51
Eigen_PC	Uncertain	0.27
FATHMM_MKL	Uncertain	0.86	D
Vest4		0.28
GERP RS		3.7

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: chr1-154898893;