rs144575803
Variant summary
Our verdict is Benign. Variant got -8 ACMG points: 1P and 9B. PP3BP6BS1BS2
The NM_001369.3(DNAH5):c.1198G>A(p.Val400Met) variant causes a missense, splice region change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00051 in 1,612,650 control chromosomes in the GnomAD database, including 5 homozygotes. In-silico tool predicts a benign outcome for this variant. 2/3 splice prediction tools predicting alterations to normal splicing. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).
Frequency
Consequence
NM_001369.3 missense, splice_region
Scores
Clinical Significance
Conservation
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ACMG classification
Verdict is Benign. Variant got -8 ACMG points.
Transcripts
RefSeq
Ensembl
Frequencies
GnomAD3 genomes AF: 0.000520 AC: 79AN: 152034Hom.: 1 Cov.: 32
GnomAD3 exomes AF: 0.000870 AC: 218AN: 250714Hom.: 1 AF XY: 0.000812 AC XY: 110AN XY: 135512
GnomAD4 exome AF: 0.000510 AC: 745AN: 1460498Hom.: 4 Cov.: 31 AF XY: 0.000537 AC XY: 390AN XY: 726578
GnomAD4 genome AF: 0.000513 AC: 78AN: 152152Hom.: 1 Cov.: 32 AF XY: 0.000578 AC XY: 43AN XY: 74392
ClinVar
Submissions by phenotype
Primary ciliary dyskinesia 3 Uncertain:6
This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score, this variant could not be ruled out of causing disease and therefore its association with disease required further investigation. A literature search was performed for the gene, cDNA change, and amino acid change (if applicable). No publications were found based on this search. This variant was therefore classified as a variant of unknown significance for this disease. -
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The DNAH5 c.1198G>A; p.Val400Met variant (rs144575803) is reported in the literature in two siblings affected with tetralogy of Fallot (Izarzugaza 2020). This variant is reported in ClinVar (Variation ID: 219733) and is found in the general population with an overall allele frequency of 0.08% (226/282,092 alleles, including one homozygote) in the Genome Aggregation Database (v2.1.1). This is a missense variant in a highly conserved nucleotide at the first base of exon 10, and computational analyses (Alamut Visual Plus v.1.5.1) predict that this variant may impact splicing by weakening the canonical acceptor splice site. However, further study is needed to determine the functional impact. While the high population frequency suggests that this is likely a benign variant, given the limited clinical data and lack of functional data, the significance of this variant is uncertain at this time. References: Izarzugaza JMG et al. Systems genetics analysis identifies calcium-signaling defects as novel cause of congenital heart disease. Genome Med. 2020 Aug 28;12(1):76. PMID: 32859249. -
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Primary ciliary dyskinesia Benign:3
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This alteration is classified as likely benign based on a combination of the following: seen in unaffected individuals, population frequency, intact protein function, lack of segregation with disease, co-occurrence, RNA analysis, in silico models, amino acid conservation, lack of disease association in case-control studies, and/or the mechanism of disease or impacted region is inconsistent with a known cause of pathogenicity. -
DNAH5-related disorder Benign:1
This variant is classified as likely benign based on ACMG/AMP sequence variant interpretation guidelines (Richards et al. 2015 PMID: 25741868, with internal and published modifications). -
Computational scores
Source:
Splicing
Find out detailed SpliceAI scores and Pangolin per-transcript scores at