rs78853309
Variant summary
Our verdict is Uncertain significance. Variant got 4 ACMG points: 4P and 0B. PM2PP3PP5
The NM_001369.3(DNAH5):c.7502G>C(p.Arg2501Pro) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.0000762 in 1,548,374 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).
Frequency
Consequence
NM_001369.3 missense
Scores
Clinical Significance
Conservation
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ACMG classification
Verdict is Uncertain_significance. Variant got 4 ACMG points.
Transcripts
RefSeq
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | Exon rank | TSL | MANE | Protein | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|---|
DNAH5 | ENST00000265104.5 | c.7502G>C | p.Arg2501Pro | missense_variant | Exon 45 of 79 | 1 | NM_001369.3 | ENSP00000265104.4 | ||
DNAH5 | ENST00000681290.1 | c.7457G>C | p.Arg2486Pro | missense_variant | Exon 45 of 79 | ENSP00000505288.1 | ||||
DNAH5 | ENST00000512443.1 | n.358G>C | non_coding_transcript_exon_variant | Exon 1 of 3 | 3 |
Frequencies
GnomAD3 genomes AF: 0.0000920 AC: 14AN: 152212Hom.: 0 Cov.: 32
GnomAD3 exomes AF: 0.000206 AC: 30AN: 145432Hom.: 0 AF XY: 0.000204 AC XY: 16AN XY: 78334
GnomAD4 exome AF: 0.0000745 AC: 104AN: 1396162Hom.: 0 Cov.: 34 AF XY: 0.0000726 AC XY: 50AN XY: 688358
GnomAD4 genome AF: 0.0000920 AC: 14AN: 152212Hom.: 0 Cov.: 32 AF XY: 0.0000941 AC XY: 7AN XY: 74358
ClinVar
Submissions by phenotype
Primary ciliary dyskinesia Pathogenic:3Uncertain:1
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The p.R2501P variant (also known as c.7502G>C), located in coding exon 45 of the DNAH5 gene, results from a G to C substitution at nucleotide position 7502. The arginine at codon 2501 is replaced by proline, an amino acid with dissimilar properties. This variant has been detected in multiple unrelated individuals with clinical features of primary ciliary dyskenesia who were homozygous or had one or two additional DNAH5 alterations (Hornef N et al. Am J Respir Crit Care Med, 2006 Jul;174:120-6; Failly M et al. J Med Genet, 2009 Apr;46:281-6; Davis SD et al. Am J Respir Crit Care Med, 2019 01;199:190-198; Fedick AM et al. Mol Genet Genomic Med, 2015 Mar;3:137-42; Bieder A et al. BMC Med Genet, 2020 05;21:87; Ambry internal data). This amino acid position is highly conserved in available vertebrate species. In addition, this alteration is predicted to be deleterious by in silico analysis. Based on the majority of available evidence to date, this variant is likely to be pathogenic. -
This sequence change replaces arginine, which is basic and polar, with proline, which is neutral and non-polar, at codon 2501 of the DNAH5 protein (p.Arg2501Pro). This variant is present in population databases (rs78853309, gnomAD 0.3%). This missense change has been observed in individual(s) with clinical features of primary ciliary dyskinesia (PMID: 16627867, 19357118, 25802884, 30067075, 32357925; internal data). In at least one individual the data is consistent with being in trans (on the opposite chromosome) from a pathogenic variant. It has also been observed to segregate with disease in related individuals. This missense change has been observed to be homozygous, hemizygous or homoplasmic in an individual who did not have the expected clinical features for that genetic result (internal data). ClinVar contains an entry for this variant (Variation ID: 179699). Invitae Evidence Modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) indicates that this missense variant is not expected to disrupt DNAH5 protein function with a negative predictive value of 95%. For these reasons, this variant has been classified as Pathogenic. -
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Primary ciliary dyskinesia 3 Pathogenic:1Uncertain:1
This DNAH5 missense variant along with another DNAH5 variant occurring in trans has been identified in two siblings affected with primay ciliary dyskinesia. The variant has also been reported in other unrelated individuals with primary ciliary dyskinesia. The variant (rs78853309) is rare (<0.1%) in a large population dataset (gnomAD v2.1.1: 31/176772 total alleles; 0.018%; no homozygotes) and has been reported in ClinVar6 (Variation ID: 179699). Two bioinformatic tools queried predict that this substitution would be damaging, and the arginine residue at this position is evolutionarily conserved across all of the species assessed. We consider the clinical significance of c.7502G>C; p.Arg2501Pro in DNAH5 to be uncertain at this time. -
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not specified Uncertain:1
proposed classification - variant undergoing re-assessment, contact laboratory -
not provided Uncertain:1
Observed in multiple patients with primary ciliary diskinesia in published literature; patients harbored other variants in the DNAH5 gene but phase for most cases is not known (PMID: 16627867, 19357118, 25802884, 32357925); In silico analysis supports that this missense variant has a deleterious effect on protein structure/function; This variant is associated with the following publications: (PMID: 19357118, 32357925, 25802884, 30067075, 38206729, 16627867) -
Computational scores
Source:
Splicing
Find out detailed SpliceAI scores and Pangolin per-transcript scores at