chr5-13780953-G-A
Variant summary
Our verdict is Uncertain significance. The variant received 2 ACMG points: 2P and 0B. PP3_Moderate
The NM_001369.3(DNAH5):c.8827C>T(p.Arg2943Cys) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000093 in 1,613,496 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 Conflicting classifications of pathogenicity (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R2943H) has been classified as Uncertain significance.
Frequency
Consequence
NM_001369.3 missense
Scores
Clinical Significance
Conservation
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ACMG classification
Our verdict: Uncertain_significance. The variant received 2 ACMG points.
Transcripts
RefSeq
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | Exon rank | TSL | MANE | Protein | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|---|
DNAH5 | ENST00000265104.5 | c.8827C>T | p.Arg2943Cys | missense_variant | Exon 53 of 79 | 1 | NM_001369.3 | ENSP00000265104.4 | ||
DNAH5 | ENST00000681290.1 | c.8782C>T | p.Arg2928Cys | missense_variant | Exon 53 of 79 | ENSP00000505288.1 |
Frequencies
GnomAD3 genomes AF: 0.0000131 AC: 2AN: 152104Hom.: 0 Cov.: 32 show subpopulations
GnomAD2 exomes AF: 0.00000399 AC: 1AN: 250832 AF XY: 0.00 show subpopulations
GnomAD4 exome AF: 0.00000890 AC: 13AN: 1461274Hom.: 0 Cov.: 31 AF XY: 0.0000110 AC XY: 8AN XY: 726966 show subpopulations
GnomAD4 genome AF: 0.0000131 AC: 2AN: 152222Hom.: 0 Cov.: 32 AF XY: 0.0000269 AC XY: 2AN XY: 74430 show subpopulations
ClinVar
Submissions by phenotype
Primary ciliary dyskinesia Pathogenic:1Uncertain:2
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This sequence change replaces arginine, which is basic and polar, with cysteine, which is neutral and slightly polar, at codon 2943 of the DNAH5 protein (p.Arg2943Cys). This variant is present in population databases (rs758324905, gnomAD 0.0009%). This missense change has been observed in individuals with clinical features of DNAH5-related conditions (Invitae). ClinVar contains an entry for this variant (Variation ID: 949808). 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) has been performed at Invitae for this missense variant, however the output from this modeling did not meet the statistical confidence thresholds required to predict the impact of this variant on DNAH5 protein function. Algorithms developed to predict the effect of sequence changes on RNA splicing suggest that this variant may disrupt the consensus splice site. This variant disrupts the p.Arg2943 amino acid residue in DNAH5. Other variant(s) that disrupt this residue have been determined to be pathogenic (Invitae). This suggests that this residue is clinically significant, and that variants that disrupt this residue are likely to be disease-causing. For these reasons, this variant has been classified as Pathogenic. -
The p.R2943C variant (also known as c.8827C>T), located in coding exon 53 of the DNAH5 gene, results from a C to T substitution at nucleotide position 8827. The arginine at codon 2943 is replaced by cysteine, an amino acid with highly dissimilar 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. -
not specified Uncertain:1
Variant summary: DNAH5 c.8827C>T (p.Arg2943Cys) results in a non-conservative amino acid change located in the P-loop containing dynein motor region D4 (IPR024317) of the encoded protein sequence. Four of four in-silico tools predict a damaging effect of the variant on protein function. The variant allele was found at a frequency of 4e-06 in 250832 control chromosomes. The available data on variant occurrences in the general population are insufficient to allow any conclusion about variant significance. c.8827C>T has been reported in at least one individual affected with Primary ciliary dyskinesia 3 (Labcorp, formerly Invitae). These data do not allow any conclusion about variant significance. To our knowledge, no experimental evidence demonstrating an impact on protein function has been reported. ClinVar contains an entry for this variant (Variation ID: 949808). Based on the evidence outlined above, the variant was classified as uncertain significance. -
Respiratory ciliopathies including non-CF bronchiectasis Uncertain:1
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Computational scores
Source:
Splicing
Find out detailed SpliceAI scores and Pangolin per-transcript scores at