chr1-154926441-G-A

Position:

• chr1-154926441-G-A

Variant summary

Our verdict is Likely benign. Variant got -6 ACMG points: 0P and 6B. BP4_Moderate BS2

The NM_006556.4(PMVK):​c.355C>T​(p.Arg119Trp) variant causes a missense change. The variant allele was found at a frequency of 0.000154 in 1,613,810 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 12/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★).

• Frequency:
  • Genomes: 𝑓 0.00037 (0 hom., cov: 31)
  • Exomes 𝑓: 0.00013 (0 hom.)
• Consequence: PMVK NM_006556.4 missense
• Clinical Significance: Uncertain significance criteria provided, multiple submitters, no conflicts U:2
• Conservation: PhyloP100: 6.38

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_benign. Variant got -6 ACMG points.

• BP4: Computational evidence support a benign effect (MetaRNN=0.08636007).
• BS2: High AC in GnomAd4 at 56 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
PMVK	NM_006556.4	c.355C>T	p.Arg119Trp	missense_variant	4/5	ENST00000368467.4	NP_006547.1
PMVK	NM_001323011.3	c.313C>T	p.Arg105Trp	missense_variant	4/5		NP_001309940.1
PMVK	NM_001323012.3	c.130C>T	p.Arg44Trp	missense_variant	4/5		NP_001309941.1
PMVK	NM_001348696.2	c.130C>T	p.Arg44Trp	missense_variant	4/5		NP_001335625.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
PMVK	ENST00000368467.4	c.355C>T	p.Arg119Trp	missense_variant	4/5	1	NM_006556.4	ENSP00000357452	P1

Frequencies

GnomAD3 genomes AF: 0.000368 AC: 56 AN: 152116 Hom.: 0 Cov.: 31

Gnomad AFR AF: 0.00101

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.000196

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.000207

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.000147

Gnomad OTH AF: 0.00

GnomAD3 exomes AF: 0.000175 AC: 44 AN: 250826 Hom.: 0 AF XY: 0.000199 AC XY: 27 AN XY: 135652

Gnomad AFR exome AF: 0.00111

Gnomad AMR exome AF: 0.000116

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.000196

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.000106

Gnomad OTH exome AF: 0.000655

GnomAD4 exome AF: 0.000131 AC: 192 AN: 1461576 Hom.: 0 Cov.: 31 AF XY: 0.000133 AC XY: 97 AN XY: 727094

Gnomad4 AFR exome AF: 0.00164

Gnomad4 AMR exome AF: 0.0000895

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.0000812

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.0000926

Gnomad4 OTH exome AF: 0.000298

GnomAD4 genome AF: 0.000368 AC: 56 AN: 152234 Hom.: 0 Cov.: 31 AF XY: 0.000322 AC XY: 24 AN XY: 74440

Gnomad4 AFR AF: 0.00101

Gnomad4 AMR AF: 0.000196

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.000207

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.000147

Gnomad4 OTH AF: 0.00

Alfa AF: 0.000109 Hom.: 0

Bravo AF: 0.000502

ESP6500AA AF: 0.000681 AC: 3

ESP6500EA AF: 0.00 AC: 0

ExAC AF: 0.000148 AC: 18

Asia WGS AF: 0.000577 AC: 2 AN: 3478

EpiCase AF: 0.000218

EpiControl AF: 0.000178

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

Inborn genetic diseases Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Jul 21, 2021

The c.355C>T (p.R119W) alteration is located in exon 4 (coding exon 4) of the PMVK gene. This alteration results from a C to T substitution at nucleotide position 355, causing the arginine (R) at amino acid position 119 to be replaced by a tryptophan (W). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

not provided Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Clinical Genetics Laboratory, Skane University Hospital Lund

May 27, 2022

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.081
BayesDel_addAF	Benign	-0.35	T
BayesDel_noAF	Benign	-0.31
CADD	Uncertain	24
DANN	Uncertain	1.0
DEOGEN2	Uncertain	0.47	T
Eigen	Benign	0.029
Eigen_PC	Benign	0.13
FATHMM_MKL	Uncertain	0.91	D
LIST_S2	Benign	0.74	T
M_CAP	Benign	0.010	T
MetaRNN	Benign	0.086	T
MetaSVM	Benign	-0.97	T
MutationAssessor	Benign	1.8	L
MutationTaster	Benign	1.0	D
PrimateAI	Benign	0.21	T
PROVEAN	Pathogenic	-4.6	D
REVEL	Benign	0.19
Sift	Uncertain	0.0040	D
Sift4G	Benign	0.062	T
Polyphen		0.058	B
Vest4		0.48
MVP		0.54
MPC		0.46
ClinPred		0.074	T
GERP RS		4.6
Varity_R		0.22
gMVP		0.59

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: rs139145474; hg19: chr1-154898917;