rs200488444
Variant summary
Our verdict is Pathogenic. Variant got 10 ACMG points: 10P and 0B. PVS1PM2
The NM_012144.4(DNAI1):c.389-1G>C variant causes a splice acceptor, intron change. The variant allele was found at a frequency of 0.000345 in 1,614,054 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. 2/2 splice prediction tools predicting alterations to normal splicing. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).
Frequency
Consequence
NM_012144.4 splice_acceptor, intron
Scores
Clinical Significance
Conservation
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ACMG classification
Verdict is Pathogenic. Variant got 10 ACMG points.
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | Exon rank | MANE | Protein | UniProt |
---|---|---|---|---|---|---|---|---|
DNAI1 | NM_012144.4 | c.389-1G>C | splice_acceptor_variant, intron_variant | Intron 5 of 19 | ENST00000242317.9 | NP_036276.1 | ||
DNAI1 | NM_001281428.2 | c.400G>C | p.Gly134Arg | missense_variant | Exon 6 of 20 | NP_001268357.1 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | Exon rank | TSL | MANE | Protein | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|---|
DNAI1 | ENST00000242317.9 | c.389-1G>C | splice_acceptor_variant, intron_variant | Intron 5 of 19 | 1 | NM_012144.4 | ENSP00000242317.4 | |||
DNAI1 | ENST00000614641.4 | c.400G>C | p.Gly134Arg | missense_variant | Exon 6 of 20 | 5 | ENSP00000480538.1 | |||
DNAI1 | ENST00000437363.5 | c.356-1G>C | splice_acceptor_variant, intron_variant | Intron 4 of 8 | 5 | ENSP00000395396.1 | ||||
DNAI1 | ENST00000488369.1 | n.505-1G>C | splice_acceptor_variant, intron_variant | Intron 5 of 8 | 3 |
Frequencies
GnomAD3 genomes AF: 0.000453 AC: 69AN: 152196Hom.: 0 Cov.: 32
GnomAD3 exomes AF: 0.000414 AC: 104AN: 251146Hom.: 1 AF XY: 0.000390 AC XY: 53AN XY: 135758
GnomAD4 exome AF: 0.000334 AC: 488AN: 1461740Hom.: 0 Cov.: 32 AF XY: 0.000312 AC XY: 227AN XY: 727160
GnomAD4 genome AF: 0.000453 AC: 69AN: 152314Hom.: 0 Cov.: 32 AF XY: 0.000564 AC XY: 42AN XY: 74490
ClinVar
Submissions by phenotype
Kartagener syndrome Pathogenic:3Uncertain:2
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The DNAI1 c.389-1G>C variant occurs in a canonical splice site (acceptor) and is therefore predicted to disrupt or distort the normal gene product. A literature search was performed for the gene and cDNA change. No publications were found based on this search. The variant is reported at a frequency of 0.00246 in the Ashkenazi Jewish population from the Genome Aggregation Database and includes one homozygous individual. Due to the potential impact of splice acceptor variants and the lack of clarifying evidence, this variant is classified as a variant of unknown significance but suspicious for pathogenicity for primary ciliary dyskinesia.This variant was observed by ICSL as part of a predisposition screen in an ostensibly healthy population. -
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Primary ciliary dyskinesia Pathogenic:1Uncertain:1Benign:1
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The c.389-1G>C intronic variant results from a G to C substitution one nucleotide upstream from coding exon 6 of the DNAI1 gene. This nucleotide position is highly conserved in available vertebrate species. In silico splice site analysis predicts that this alteration may weaken the native splice acceptor site and will result in the creation or strengthening of a novel splice acceptor site. Alterations that disrupt the canonical splice site are expected to cause aberrant splicing, resulting in an abnormal protein or a transcript that is subject to nonsense-mediated mRNA decay; however, direct evidence is unavailable. Based on data from gnomAD, the frequency for this variant is above the maximum credible frequency for a disease-causing variant in this gene based on internally established thresholds (Karczewski et al. Nature. 2020 May;581(7809):434-443; Whiffin et al. Genet Med. 2017 10;19:1151-1158). Based on the available evidence, the clinical significance of this variant remains unclear. -
not provided Pathogenic:1
Canonical splice site variant predicted to result in a null allele in a gene for which loss of function is a known mechanism of disease; Observed in a patient with severe bronchiectasis; however, no second variant in this gene was identified (PMID: 35728977); This variant is associated with the following publications: (PMID: 34426522, 31589614, 28152038, 35728977) -
DNAI1-related disorder Pathogenic:1
The DNAI1 c.389-1G>C variant is predicted to disrupt the AG splice acceptor site and interfere with normal splicing. To our knowledge, this variant has not been reported in the literature in association with disease. This variant is reported in 0.24% of alleles in individuals of Ashkenazi Jewish descent in gnomAD. Variants that disrupt the AG acceptor site have been reported to be pathogenic for primary ciliary dyskinesia (Zariwala et al. 2006. PubMed ID: 16858015), and this variant has been classified as likely pathogenic by multiple independent submitters and uncertain by one submitter to the ClinVar database (https://www.ncbi.nlm.nih.gov/clinvar/variation/454836). Given the evidence, we interpret c.389-1G>C as likely pathogenic. -
Computational scores
Source:
Splicing
Find out detailed SpliceAI scores and Pangolin per-transcript scores at