14-49634618-C-A
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Variant summary
Our verdict is Uncertain significance. Variant got 1 ACMG points: 2P and 1B. PM2BP4
The NM_018139.3(DNAAF2):c.532G>T(p.Val178Leu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000412 in 1,454,598 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).
Frequency
Genomes: not found (cov: 33)
Exomes 𝑓: 0.0000041 ( 0 hom. )
Consequence
DNAAF2
NM_018139.3 missense
NM_018139.3 missense
Scores
1
10
8
Clinical Significance
Conservation
PhyloP100: 3.50
Genes affected
DNAAF2 (HGNC:20188): (dynein axonemal assembly factor 2) This gene encodes a highly conserved protein involved in the preassembly of dynein arm complexes which power cilia. These complexes are found in some cilia and are assembled in the cytoplasm prior to transport for cilia formation. Mutations in this gene have been associated with primary ciliary dyskinesia. Multiple transcript variants encoding different isoforms have been found for this gene.[provided by RefSeq, Oct 2009]
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ACMG classification
Classification made for transcript
Verdict is Uncertain_significance. Variant got 1 ACMG points.
PM2
Very rare variant in population databases, with high coverage;
BP4
Computational evidence support a benign effect (MetaRNN=0.4083894).
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | UniProt |
---|---|---|---|---|---|---|---|
DNAAF2 | NM_018139.3 | c.532G>T | p.Val178Leu | missense_variant | 1/3 | ENST00000298292.13 | |
DNAAF2 | NM_001083908.2 | c.532G>T | p.Val178Leu | missense_variant | 1/2 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|
DNAAF2 | ENST00000298292.13 | c.532G>T | p.Val178Leu | missense_variant | 1/3 | 1 | NM_018139.3 | P2 | |
DNAAF2 | ENST00000406043.3 | c.532G>T | p.Val178Leu | missense_variant | 1/2 | 1 | A2 |
Frequencies
GnomAD3 genomes Cov.: 33
GnomAD3 genomes
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33
GnomAD3 exomes AF: 0.00000420 AC: 1AN: 237822Hom.: 0 AF XY: 0.00000767 AC XY: 1AN XY: 130380
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GnomAD4 exome AF: 0.00000412 AC: 6AN: 1454598Hom.: 0 Cov.: 88 AF XY: 0.00000276 AC XY: 2AN XY: 723980
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GnomAD4 genome Cov.: 33
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33
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ClinVar
Significance: Uncertain significance
Submissions summary: Uncertain:1
Revision: criteria provided, single submitter
LINK: link
Submissions by phenotype
Primary ciliary dyskinesia Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | Invitae | Aug 26, 2021 | This sequence change replaces valine with leucine at codon 178 of the DNAAF2 protein (p.Val178Leu). The valine residue is highly conserved and there is a small physicochemical difference between valine and leucine. The frequency data for this variant in the population databases is considered unreliable, as metrics indicate poor data quality at this position in the ExAC database. This variant has not been reported in the literature in individuals affected with DNAAF2-related conditions. Algorithms developed to predict the effect of missense changes on protein structure and function are either unavailable or do not agree on the potential impact of this missense change (SIFT: "Deleterious"; PolyPhen-2: "Probably Damaging"; Align-GVGD: "Class C0"). 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. - |
Computational scores
Source:
Name
Calibrated prediction
Score
Prediction
AlphaMissense
Uncertain
BayesDel_addAF
Uncertain
T
BayesDel_noAF
Benign
CADD
Uncertain
DANN
Uncertain
DEOGEN2
Benign
T;.
Eigen
Uncertain
Eigen_PC
Uncertain
FATHMM_MKL
Uncertain
D
LIST_S2
Benign
T;T
M_CAP
Benign
D
MetaRNN
Benign
T;T
MetaSVM
Benign
T
MutationAssessor
Uncertain
M;M
MutationTaster
Benign
D;D
PrimateAI
Uncertain
T
PROVEAN
Uncertain
D;D
REVEL
Benign
Sift
Pathogenic
D;D
Sift4G
Uncertain
D;D
Polyphen
P;D
Vest4
MutPred
Loss of sheet (P = 0.0315);Loss of sheet (P = 0.0315);
MVP
MPC
ClinPred
D
GERP RS
Varity_R
gMVP
Splicing
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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