rs104895326

chr12-109595129-C-Achr12-109595129-C-G

Variant summary

Our verdict is Pathogenic. Variant got 14 ACMG points: 14P and 0B. PS1 PM1 PM2 PM5 PP3_Strong

The NM_000431.4(MVK):c.987C>A(p.Ser329Arg) variant causes a missense 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 not provided (no stars). Another nucleotide change resulting in same amino acid change has been previously reported as Pathogenicin ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. S329N) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 32)
• Consequence: MVK NM_000431.4 missense
• Clinical Significance: not provided no classification provided O:1
• Conservation: PhyloP100: 4.10

Genes affected

MVK (HGNC:7530): (mevalonate kinase) This gene encodes the peroxisomal enzyme mevalonate kinase. Mevalonate is a key intermediate, and mevalonate kinase a key early enzyme, in isoprenoid and sterol synthesis. Mevalonate kinase deficiency caused by mutation of this gene results in mevalonic aciduria, a disease characterized psychomotor retardation, failure to thrive, hepatosplenomegaly, anemia and recurrent febrile crises. Defects in this gene also cause hyperimmunoglobulinaemia D and periodic fever syndrome, a disorder characterized by recurrent episodes of fever associated with lymphadenopathy, arthralgia, gastrointestinal dismay and skin rash. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Jul 2014]

ACMG classification

Verdict is Pathogenic. Variant got 14 ACMG points.

• PS1: Transcript NM_000431.4 (MVK) is affected with MISSENSE_VARIANT having same AA change as one Pathogenic present in ClinVar as 848443
• PM1: In a hotspot region, there are 3 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 0 benign, 4 uncertain in NM_000431.4
• PM2: Very rare variant in population databases, with high coverage
• PM5: Other missense variant is known to change same aminoacid residue: Variant chr12-109595128-G-A is described in Lovd as [Likely_pathogenic].
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.987

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
MVK	NM_000431.4	c.987C>A	p.Ser329Arg	missense_variant	10/11	ENST00000228510.8

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
MVK	ENST00000228510.8	c.987C>A	p.Ser329Arg	missense_variant	10/11	1	NM_000431.4	P1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 32

ClinVar

Significance: not provided

Submissions summary: Other:1

Revision: no classification provided

Submissions by phenotype

Hyperimmunoglobulin D with periodic fever Other:1

not provided, no classification provided

literature only

Unité médicale des maladies autoinflammatoires, CHRU Montpellier

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Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.99
BayesDel_addAF	Pathogenic	0.50	D
BayesDel_noAF	Pathogenic	0.49
Cadd	Pathogenic	30
Dann	Uncertain	1.0
Eigen	Pathogenic	0.74
Eigen_PC	Uncertain	0.64
FATHMM_MKL	Uncertain	0.93	D
LIST_S2	Pathogenic	0.99	D;.;.;D;D
M_CAP	Pathogenic	0.57	D
MetaRNN	Pathogenic	0.99	D;D;D;D;D
MetaSVM	Pathogenic	0.92	D
MutationTaster	Benign	1.0	D;D;D;D;D;D
PrimateAI	Uncertain	0.71	T
PROVEAN	Uncertain	-4.1	D;D;D;.;N
REVEL	Pathogenic	0.91
Sift	Uncertain	0.0050	D;D;D;.;T
Sift4G	Uncertain	0.0060	D;D;D;D;D
Polyphen		1.0, 1.0	.;D;D;D;D
Vest4		0.99
MutPred		0.94		.;Gain of MoRF binding (P = 0.0106);.;.;Gain of MoRF binding (P = 0.0106);
MVP		0.98
MPC		1.2
ClinPred		1.0	D
GERP RS		4.5
Varity_R		0.99
gMVP		0.99

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.080		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: rs104895326; hg19: chr12-110032934;