rs1248744087
Variant summary
Our verdict is Uncertain significance. Variant got 4 ACMG points: 5P and 1B. PM1PM2PP2BP4
The NM_001363.5(DKC1):c.1039A>G(p.Ile347Val) variant causes a missense, splice region change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 12/19 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).
Frequency
Genomes: not found (cov: 22)
Consequence
DKC1
NM_001363.5 missense, splice_region
NM_001363.5 missense, splice_region
Scores
3
10
Clinical Significance
Conservation
PhyloP100: 2.80
Genes affected
DKC1 (HGNC:2890): (dyskerin pseudouridine synthase 1) This gene functions in two distinct complexes. It plays an active role in telomerase stabilization and maintenance, as well as recognition of snoRNAs containing H/ACA sequences which provides stability during biogenesis and assembly into H/ACA small nucleolar RNA ribonucleoproteins (snoRNPs). This gene is highly conserved and widely expressed, and may play additional roles in nucleo-cytoplasmic shuttling, DNA damage response, and cell adhesion. Mutations have been associated with X-linked dyskeratosis congenita. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Jan 2014]
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ACMG classification
Classification made for transcript
Verdict is Uncertain_significance. Variant got 4 ACMG points.
PM1
?
In a hotspot region, there are 2 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 0 benign, 4 uncertain in NM_001363.5
PM2
?
Very rare variant in population databases, with high coverage;
PP2
?
Missense variant where missense usually causes diseases, DKC1
BP4
?
Computational evidence support a benign effect (MetaRNN=0.33919013).
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | UniProt |
---|---|---|---|---|---|---|---|
DKC1 | NM_001363.5 | c.1039A>G | p.Ile347Val | missense_variant, splice_region_variant | 11/15 | ENST00000369550.10 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|
DKC1 | ENST00000369550.10 | c.1039A>G | p.Ile347Val | missense_variant, splice_region_variant | 11/15 | 1 | NM_001363.5 | P2 |
Frequencies
GnomAD3 genomes ? Cov.: 22
GnomAD3 genomes
?
Cov.:
22
GnomAD4 exome Cov.: 22
GnomAD4 exome
Cov.:
22
GnomAD4 genome ? Cov.: 22
GnomAD4 genome
?
Cov.:
22
Bravo
AF:
ClinVar
Significance: Uncertain significance
Submissions summary: Uncertain:1
Revision: criteria provided, single submitter
LINK: link
Submissions by phenotype
Dyskeratosis congenita Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | Invitae | Jan 17, 2017 | In summary, this variant is a novel missense change that is not predicted to affect protein function. There is no indication that it causes disease, but the available evidence is currently insufficient to prove that conclusively. Therefore, it has been classified as a Variant of Uncertain Significance. Algorithms developed to predict the effect of missense changes on protein structure and function output the following: (SIFT: "Tolerated"; PolyPhen-2: "Benign"; Align-GVGD: "Class C0"). The valine amino acid residue is found in multiple mammalian species, suggesting that this missense change does not adversely affect protein function. These predictions have not been confirmed by published functional studies. This variant is not present in population databases (ExAC no frequency) and has not been reported in the literature in individuals with a DKC1-related disease. This sequence change replaces isoleucine with valine at codon 347 of the DKC1 protein (p.Ile347Val). The isoleucine residue is highly conserved and there is a small physicochemical difference between isoleucine and valine. - |
Computational scores
Source:
Name
Calibrated prediction
Score
Prediction
AlphaMissense
Benign
BayesDel_addAF
Benign
T
BayesDel_noAF
Benign
Cadd
Benign
Dann
Benign
FATHMM_MKL
Benign
D
LIST_S2
Uncertain
D;D
M_CAP
Uncertain
D
MetaRNN
Benign
T;T
MetaSVM
Uncertain
T
MutationAssessor
Benign
L;L
MutationTaster
Benign
D
PrimateAI
Benign
T
Sift4G
Benign
T;T
Polyphen
0.011
.;B
Vest4
MutPred
Gain of catalytic residue at I347 (P = 0.0468);Gain of catalytic residue at I347 (P = 0.0468);
MVP
MPC
1.1
ClinPred
T
GERP RS
RBP_binding_hub_radar
RBP_regulation_power_radar
Varity_R
gMVP
Splicing
Name
Calibrated prediction
Score
Prediction
SpliceAI score (max)
Details are displayed if max score is > 0.2
Find out detailed SpliceAI scores and Pangolin per-transcript scores at