rs1085307485
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Variant summary
Our verdict is Uncertain significance. Variant got 3 ACMG points: 3P and 0B. PM2PP3
The NM_001369.3(DNAH5):c.661G>A(p.Val221Met) variant causes a missense, splice region change. The variant allele was found at a frequency of 0.00000124 in 1,613,898 control chromosomes in the GnomAD database, with no homozygous occurrence. 2/3 splice prediction tools predicting alterations to normal splicing. Variant has been reported in ClinVar as Uncertain significance (★★).
Frequency
Genomes: 𝑓 0.0000066 ( 0 hom., cov: 33)
Exomes 𝑓: 6.8e-7 ( 0 hom. )
Consequence
DNAH5
NM_001369.3 missense, splice_region
NM_001369.3 missense, splice_region
Scores
9
9
Splicing: ADA: 0.9993
2
Clinical Significance
Conservation
PhyloP100: 3.80
Genes affected
DNAH5 (HGNC:2950): (dynein axonemal heavy chain 5) This gene encodes a dynein protein, which is part of a microtubule-associated motor protein complex consisting of heavy, light, and intermediate chains. This protein is an axonemal heavy chain dynein. It functions as a force-generating protein with ATPase activity, whereby the release of ADP is thought to produce the force-producing power stroke. Mutations in this gene cause primary ciliary dyskinesia type 3, as well as Kartagener syndrome, which are both diseases due to ciliary defects. [provided by RefSeq, Oct 2009]
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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
?
Splicing scoreres supports a deletorius effect: Scorers claiming Pathogenic: dbscSNV1_ADA, dbscSNV1_RF. No scorers claiming Uncertain. Scorers claiming Benign: max_spliceai.
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | UniProt |
---|---|---|---|---|---|---|---|
DNAH5 | NM_001369.3 | c.661G>A | p.Val221Met | missense_variant, splice_region_variant | 6/79 | ENST00000265104.5 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|
DNAH5 | ENST00000265104.5 | c.661G>A | p.Val221Met | missense_variant, splice_region_variant | 6/79 | 1 | NM_001369.3 | P4 |
Frequencies
GnomAD3 genomes ? AF: 0.00000657 AC: 1AN: 152192Hom.: 0 Cov.: 33
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GnomAD4 exome AF: 6.84e-7 AC: 1AN: 1461706Hom.: 0 Cov.: 31 AF XY: 0.00 AC XY: 0AN XY: 727176
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GnomAD4 genome ? AF: 0.00000657 AC: 1AN: 152192Hom.: 0 Cov.: 33 AF XY: 0.00 AC XY: 0AN XY: 74350
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ClinVar
Significance: Uncertain significance
Submissions summary: Uncertain:2
Revision: criteria provided, multiple submitters, no conflicts
LINK: link
Submissions by phenotype
Primary ciliary dyskinesia Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | Invitae | Jun 20, 2022 | 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. Algorithms developed to predict the effect of sequence changes on RNA splicing suggest that this variant may disrupt the consensus splice site. 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: "Possibly Damaging"; Align-GVGD: "Class C0"). ClinVar contains an entry for this variant (Variation ID: 426176). This variant has not been reported in the literature in individuals affected with DNAH5-related conditions. This variant is present in population databases (no rsID available, gnomAD 0.01%). This sequence change replaces valine, which is neutral and non-polar, with methionine, which is neutral and non-polar, at codon 221 of the DNAH5 protein (p.Val221Met). - |
not provided Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | GeneDx | Apr 28, 2017 | The c.661 G>A variant in the DNAH5 gene has not been reported previously as a pathogenic variant, nor as a benign variant, to our knowledge. The c.661 G>A variant is not observed in large population cohorts (Lek et al., 2016; 1000 Genomes Consortium et al., 2015; Exome Variant Server). In-silico splice prediction models predict that c.661 G>A may damage the natural splice acceptor site in intron 6 that could. However, in the absence of RNA/functional studies, the actual effect of the c.661 G>A change in this individual is unknown. If c.661 G>A does not alter splicing, it will result in the V221M missense change. The V221M variant is a conservative amino acid substitution, which is not likely to impact secondary protein structure as these residues share similar properties. This substitution occurs at a position where amino acids with similar properties to Valine are tolerated across species. In silico analysis is inconsistent in its predictions as to whether or not the variant is damaging to the protein structure/function. We interpret c.661 G>A as a variant of uncertain significance. - |
Computational scores
Source:
Name
Calibrated prediction
Score
Prediction
AlphaMissense
Benign
BayesDel_addAF
Benign
T
BayesDel_noAF
Benign
CADD
Uncertain
DANN
Uncertain
DEOGEN2
Benign
T
Eigen
Uncertain
Eigen_PC
Uncertain
FATHMM_MKL
Uncertain
D
LIST_S2
Uncertain
D
M_CAP
Benign
D
MetaRNN
Uncertain
D
MetaSVM
Benign
T
MutationAssessor
Uncertain
M
MutationTaster
Benign
D
PrimateAI
Uncertain
T
PROVEAN
Benign
N
REVEL
Benign
Sift
Uncertain
D
Polyphen
D
Vest4
MutPred
Gain of disorder (P = 0.0702);
MVP
MPC
ClinPred
D
GERP RS
Varity_R
gMVP
Splicing
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Calibrated prediction
Score
Prediction
dbscSNV1_ADA
Pathogenic
dbscSNV1_RF
Pathogenic
SpliceAI score (max)
Details are displayed if max score is > 0.2
Find out detailed SpliceAI scores and Pangolin per-transcript scores at