chr7-21705497-C-T
Variant summary
Our verdict is Likely pathogenic. The variant received 8 ACMG points: 8P and 0B. PP5_Very_Strong
The NM_001277115.2(DNAH11):c.6506C>T(p.Ser2169Leu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000421 in 1,613,622 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Likely pathogenic (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. S2169T) has been classified as Likely benign.
Frequency
Consequence
NM_001277115.2 missense
Scores
Clinical Significance
Conservation
Publications
- primary ciliary dyskinesia 7Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: PanelApp Australia, Laboratory for Molecular Medicine, Labcorp Genetics (formerly Invitae), ClinGen
- primary ciliary dyskinesiaInheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
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ACMG classification
Our verdict: Likely_pathogenic. The variant received 8 ACMG points.
Transcripts
RefSeq
Ensembl
Frequencies
GnomAD3 genomes AF: 0.000158 AC: 24AN: 152134Hom.: 0 Cov.: 32 show subpopulations
GnomAD2 exomes AF: 0.0000683 AC: 17AN: 249062 AF XY: 0.0000592 show subpopulations
GnomAD4 exome AF: 0.0000301 AC: 44AN: 1461370Hom.: 0 Cov.: 31 AF XY: 0.0000330 AC XY: 24AN XY: 726950 show subpopulations
Age Distribution
GnomAD4 genome AF: 0.000158 AC: 24AN: 152252Hom.: 0 Cov.: 32 AF XY: 0.000107 AC XY: 8AN XY: 74448 show subpopulations
Age Distribution
ClinVar
Submissions by phenotype
Primary ciliary dyskinesia Pathogenic:2Uncertain:1
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This sequence change replaces serine, which is neutral and polar, with leucine, which is neutral and non-polar, at codon 2169 of the DNAH11 protein (p.Ser2169Leu). This variant is present in population databases (rs373946181, gnomAD 0.06%). This missense change has been observed in individual(s) with clinical features of primary ciliary dyskinesia (PMID: 29467202; internal data). ClinVar contains an entry for this variant (Variation ID: 658037). 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) has been performed 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 DNAH11 protein function. For these reasons, this variant has been classified as Pathogenic. -
The p.S2169L variant (also known as c.6506C>T), located in coding exon 39 of the DNAH11 gene, results from a C to T substitution at nucleotide position 6506. The serine at codon 2169 is replaced by leucine, an amino acid with dissimilar properties. This alteration has been detected in the homozygous state, and in conjunction with a pathogenic DNAH11 mutation, in multiple unrelated individuals with primary ciliary dyskinesia (Shoemark A et al. Eur Respir J, 2018 02;51:; Ambry internal data). This amino acid position is highly conserved in available vertebrate species. In addition, this alteration is predicted to be tolerated by in silico analysis. Based on the majority of available evidence to date, this variant is likely to be pathogenic. -
Primary ciliary dyskinesia 7 Pathogenic:2
Variant summary: DNAH11 c.6506C>T (p.Ser2169Leu) results in a non-conservative amino acid change in the encoded protein sequence. Three of four in-silico tools predict a damaging effect of the variant on protein function. The variant allele was found at a frequency of 6.8e-05 in 249062 control chromosomes. This frequency is not significantly higher than estimated for a pathogenic variant in DNAH11 causing Primary Ciliary Dyskinesia 7, allowing no conclusion about variant significance. c.6506C>T has been reported in the homozygous and presumed compound heterozygous state in the literature and at Labcorp in multiple individuals affected with Primary Ciliary Dyskinesia 7 (e.g., Shoemark_2018, internal data). A further affected individual with primary ciliary dyskinesia with a biallelic genotype has been reported by another laboratory, however the details of that case were not available (Ambry Genetics, ClinVar). These data indicate that the variant may be associated with disease. To our knowledge, no experimental evidence demonstrating an impact on protein function has been reported. The following publication has been ascertained in the context of this evaluation (PMID: 29467202). ClinVar contains an entry for this variant (Variation ID: 658037). Based on the evidence outlined above, the variant was classified as likely pathogenic. -
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Computational scores
Source:
Splicing
Find out detailed SpliceAI scores and Pangolin per-transcript scores at