rs371529625
Variant summary
Our verdict is Uncertain significance. Variant got 3 ACMG points: 4P and 1B. PM2PP3_ModerateBS1_Supporting
The NM_014908.4(DOLK):c.898C>T(p.Leu300Phe) variant causes a missense change. The variant allele was found at a frequency of 0.000149 in 1,613,960 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★).
Frequency
Genomes: 𝑓 0.00013 ( 0 hom., cov: 31)
Exomes 𝑓: 0.00015 ( 0 hom. )
Consequence
DOLK
NM_014908.4 missense
NM_014908.4 missense
Scores
9
9
1
Clinical Significance
Conservation
PhyloP100: 5.21
Genes affected
DOLK (HGNC:23406): (dolichol kinase) The protein encoded by this gene catalyzes the CTP-mediated phosphorylation of dolichol, and is involved in the synthesis of Dol-P-Man, which is an essential glycosyl carrier lipid for C- and O-mannosylation, N- and O-linked glycosylation of proteins, and for the biosynthesis of glycosyl phosphatidylinositol anchors in endoplasmic reticulum. Mutations in this gene are associated with dolichol kinase deficiency.[provided by RefSeq, Apr 2010]
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ACMG classification
Classification made for transcript
Verdict is Uncertain_significance. Variant got 3 ACMG points.
PM2
?
Very rare variant in population databases, with high coverage;
PP3
?
MetaRNN computational evidence supports a deleterious effect, 0.872
BS1
?
Variant frequency is greater than expected in population nfe. gnomad4 allele frequency = 0.000131 (20/152160) while in subpopulation NFE AF= 0.000176 (12/68026). AF 95% confidence interval is 0.000102. There are 0 homozygotes in gnomad4. There are 10 alleles in male gnomad4 subpopulation. Median coverage is 31. This position pass quality control queck. Existence of Clinvar submissions makes me limit the strength of this signal to Supporting
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | UniProt |
---|---|---|---|---|---|---|---|
DOLK | NM_014908.4 | c.898C>T | p.Leu300Phe | missense_variant | 1/1 | ENST00000372586.4 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|
DOLK | ENST00000372586.4 | c.898C>T | p.Leu300Phe | missense_variant | 1/1 | NM_014908.4 | P1 |
Frequencies
GnomAD3 genomes ? AF: 0.000131 AC: 20AN: 152160Hom.: 0 Cov.: 31
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GnomAD3 exomes AF: 0.000119 AC: 30AN: 251200Hom.: 0 AF XY: 0.000103 AC XY: 14AN XY: 135800
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GnomAD4 exome AF: 0.000151 AC: 221AN: 1461800Hom.: 0 Cov.: 31 AF XY: 0.000139 AC XY: 101AN XY: 727204
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ClinVar
Significance: Uncertain significance
Submissions summary: Uncertain:5
Revision: criteria provided, multiple submitters, no conflicts
LINK: link
Submissions by phenotype
DK1-congenital disorder of glycosylation Uncertain:2
Uncertain significance, criteria provided, single submitter | clinical testing | Invitae | Oct 17, 2022 | This sequence change replaces leucine, which is neutral and non-polar, with phenylalanine, which is neutral and non-polar, at codon 300 of the DOLK protein (p.Leu300Phe). This variant is present in population databases (rs371529625, gnomAD 0.02%). This variant has not been reported in the literature in individuals affected with DOLK-related conditions. ClinVar contains an entry for this variant (Variation ID: 392015). Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is expected to disrupt DOLK protein function. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. - |
Uncertain significance, criteria provided, single submitter | clinical testing | Fulgent Genetics, Fulgent Genetics | Feb 22, 2022 | - - |
not provided Uncertain:2
Uncertain significance, criteria provided, single submitter | clinical testing | GeneDx | Apr 22, 2021 | In silico analysis supports that this missense variant has a deleterious effect on protein structure/function; Has not been previously published as pathogenic or benign to our knowledge - |
Uncertain significance, no assertion criteria provided | clinical testing | Department of Pathology and Laboratory Medicine, Sinai Health System | - | The DOLK p.Leu300Phe variant was identified in dbSNP (ID: rs371529625) and ClinVar (classified as a VUS by GeneDx and Invitae) but was not identified in Cosmic or LOVD 3.0. The variant was also identified in control databases in 33 of 282592 chromosomes at a frequency of 0.000117 (Genome Aggregation Database Feb 27, 2017). The variant was observed in the following populations: Latino in 7 of 35436 chromosomes (freq: 0.000198), African in 4 of 24914 chromosomes (freq: 0.000161), European (non-Finnish) in 20 of 129000 chromosomes (freq: 0.000155), Other in 1 of 7214 chromosomes (freq: 0.000139) and Ashkenazi Jewish in 1 of 10348 chromosomes (freq: 0.000097); it was not observed in the East Asian, European (Finnish), and South Asian populations. The p.Leu300 residue is conserved in mammals and computational analyses (PolyPhen-2, SIFT, AlignGVGD, BLOSUM, MutationTaster) provide inconsistent predictions regarding the impact to the protein; this information is not very predictive of pathogenicity. The variant occurs outside of the splicing consensus sequence and in silico or computational prediction software programs (SpliceSiteFinder, MaxEntScan, NNSPLICE, GeneSplicer) do not predict a difference in splicing. In summary, based on the above information the clinical significance of this variant cannot be determined with certainty at this time. This variant is classified as a variant of uncertain significance. - |
Cardiovascular phenotype Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | Ambry Genetics | Jan 29, 2024 | The p.L300F variant (also known as c.898C>T), located in coding exon 1 of the DOLK gene, results from a C to T substitution at nucleotide position 898. The leucine at codon 300 is replaced by phenylalanine, an amino acid with highly similar properties. This amino acid position is highly conserved in available vertebrate species. In addition, this alteration is predicted to be deleterious by in silico analysis. Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear. - |
Computational scores
Source:
Name
Calibrated prediction
Score
Prediction
AlphaMissense
Pathogenic
BayesDel_addAF
Pathogenic
D
BayesDel_noAF
Pathogenic
Cadd
Pathogenic
Dann
Uncertain
DEOGEN2
Uncertain
D
Eigen
Pathogenic
Eigen_PC
Pathogenic
FATHMM_MKL
Uncertain
D
LIST_S2
Uncertain
D
M_CAP
Uncertain
D
MetaRNN
Pathogenic
D
MetaSVM
Uncertain
D
MutationAssessor
Pathogenic
H
MutationTaster
Benign
D
PrimateAI
Uncertain
T
PROVEAN
Uncertain
D
REVEL
Pathogenic
Sift
Uncertain
D
Sift4G
Pathogenic
D
Polyphen
D
Vest4
MVP
MPC
ClinPred
D
GERP RS
Varity_R
gMVP
Splicing
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Calibrated prediction
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SpliceAI score (max)
Details are displayed if max score is > 0.2
Find out detailed SpliceAI scores and Pangolin per-transcript scores at