rs200488444
Variant summary
Our verdict is Pathogenic. Variant got 14 ACMG points: 14P and 0B. PVS1PM2PP3_Strong
The NM_012144.4(DNAI1):c.389-1G>C variant causes a splice acceptor 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
Genomes: 𝑓 0.00045 ( 0 hom., cov: 32)
Exomes 𝑓: 0.00033 ( 0 hom. )
Consequence
DNAI1
NM_012144.4 splice_acceptor
NM_012144.4 splice_acceptor
Scores
4
2
1
Splicing: ADA: 1.000
1
Clinical Significance
Conservation
PhyloP100: 4.12
Genes affected
DNAI1 (HGNC:2954): (dynein axonemal intermediate chain 1) This gene encodes a member of the dynein intermediate chain family. The encoded protein is part of the dynein complex in respiratory cilia. The inner- and outer-arm dyneins, which bridge between the doublet microtubules in axonemes, are the force-generating proteins responsible for the sliding movement in axonemes. The intermediate and light chains, thought to form the base of the dynein arm, help mediate attachment and may also participate in regulating dynein activity. Mutations in this gene result in abnormal ciliary ultrastructure and function associated with primary ciliary dyskinesia and Kartagener syndrome. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Jul 2013]
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ACMG classification
Classification made for transcript
Verdict is Pathogenic. Variant got 14 ACMG points.
PVS1
?
Splicing variant, LoF is a know mechanism of disease, Cryptic splice site detected, with MaxEntScore 5.7, offset of 8, new splice context is: tatcctaccaacgttctcAGgag. Cryptic site results in frameshift change. If cryptic site found is not functional and variant results in exon loss, it results in frameshift change.
PM2
?
Very rare variant in population databases, with high coverage;
PP3
?
Splicing scoreres supports a deletorius effect: Scorers claiming Pathogenic: dbscSNV1_ADA, max_spliceai. No scorers claiming Uncertain. No scorers claiming Benign.
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | UniProt |
---|---|---|---|---|---|---|---|
DNAI1 | NM_012144.4 | c.389-1G>C | splice_acceptor_variant | ENST00000242317.9 | |||
DNAI1 | NM_001281428.2 | c.400G>C | p.Gly134Arg | missense_variant | 6/20 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|
DNAI1 | ENST00000242317.9 | c.389-1G>C | splice_acceptor_variant | 1 | NM_012144.4 | ||||
DNAI1 | ENST00000437363.5 | c.356-1G>C | splice_acceptor_variant | 5 | |||||
DNAI1 | ENST00000614641.4 | c.400G>C | p.Gly134Arg | missense_variant | 6/20 | 5 | P1 | ||
DNAI1 | ENST00000488369.1 | n.505-1G>C | splice_acceptor_variant, non_coding_transcript_variant | 3 |
Frequencies
GnomAD3 genomes ? AF: 0.000453 AC: 69AN: 152196Hom.: 0 Cov.: 32
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GnomAD3 exomes AF: 0.000414 AC: 104AN: 251146Hom.: 1 AF XY: 0.000390 AC XY: 53AN XY: 135758
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GnomAD4 exome AF: 0.000334 AC: 488AN: 1461740Hom.: 0 Cov.: 32 AF XY: 0.000312 AC XY: 227AN XY: 727160
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ClinVar
Significance: Conflicting classifications of pathogenicity
Submissions summary: Pathogenic:5Uncertain:2Benign:1
Revision: criteria provided, conflicting classifications
LINK: link
Submissions by phenotype
Kartagener syndrome Pathogenic:2Uncertain:2
Likely pathogenic, criteria provided, single submitter | clinical testing | Counsyl | May 23, 2017 | - - |
Uncertain significance, criteria provided, single submitter | clinical testing | Illumina Laboratory Services, Illumina | Oct 23, 2018 | 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. - |
Likely pathogenic, criteria provided, single submitter | clinical testing | Revvity Omics, Revvity | Jan 25, 2021 | - - |
Uncertain significance, criteria provided, single submitter | clinical testing | Johns Hopkins Genomics, Johns Hopkins University | Feb 17, 2022 | - - |
Primary ciliary dyskinesia Pathogenic:2Benign:1
Likely pathogenic, no assertion criteria provided | clinical testing | Natera, Inc. | Jul 17, 2020 | - - |
Benign, criteria provided, single submitter | clinical testing | Invitae | Jan 31, 2024 | - - |
Likely pathogenic, criteria provided, single submitter | clinical testing | Ambry Genetics | Oct 31, 2019 | 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. Using the ESEfinder and Human Splicing Finder (HSF) splice site prediction tools, this alteration is predicted to abolish or weaken the native splice acceptor site; however, direct evidence is unavailable (Desmet FO et al. Nucleic Acids Res. 2009 May;37:e67). 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. As such, this alteration is classified as likely pathogenic. - |
not provided Pathogenic:1
Likely pathogenic, criteria provided, single submitter | clinical testing | GeneDx | Jul 03, 2019 | Canonical splice site variant in a gene for which loss-of-function is a known mechanism of disease; Reported in the published literature (LaDuca et al., 2017) without clinical information, segregation evidence, or evidence in support of pathogenicity provided; This variant is associated with the following publications: (PMID: 31589614, 28152038) - |
Computational scores
Source:
Name
Calibrated prediction
Score
Prediction
BayesDel_addAF
Pathogenic
D
BayesDel_noAF
Pathogenic
Cadd
Pathogenic
Dann
Uncertain
Eigen
Pathogenic
Eigen_PC
Pathogenic
FATHMM_MKL
Uncertain
D
MutationTaster
Benign
D
GERP RS
Splicing
Name
Calibrated prediction
Score
Prediction
dbscSNV1_ADA
Pathogenic
SpliceAI score (max)
Details are displayed if max score is > 0.2
DS_AG_spliceai
Position offset: 9
DS_AL_spliceai
Position offset: 1
Find out detailed SpliceAI scores and Pangolin per-transcript scores at