9-34517291-A-T

Position:

• chr9-34517291-A-T

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 2P and 1B. PM2 BP4

The ENST00000242317.9(DNAI1):​c.1825A>T​(p.Ile609Leu) variant causes a missense change. The variant allele was found at a frequency of 0.0000109 in 1,461,568 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 14/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. I609V) has been classified as Likely benign.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.000011 (0 hom.)
• Consequence: DNAI1 ENST00000242317.9 missense
• Clinical Significance: Uncertain significance criteria provided, multiple submitters, no conflicts U:2
• Conservation: PhyloP100: 6.35

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]

ACMG classification

Verdict is Uncertain_significance. Variant got 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.35411194).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
DNAI1	NM_012144.4	c.1825A>T	p.Ile609Leu	missense_variant	19/20	ENST00000242317.9	NP_036276.1
DNAI1	NM_001281428.2	c.1837A>T	p.Ile613Leu	missense_variant	19/20		NP_001268357.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
DNAI1	ENST00000242317.9	c.1825A>T	p.Ile609Leu	missense_variant	19/20	1	NM_012144.4	ENSP00000242317

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 0.0000109 AC: 16 AN: 1461568 Hom.: 0 Cov.: 31 AF XY: 0.0000165 AC XY: 12 AN XY: 727058

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.0000117

Gnomad4 OTH exome AF: 0.0000497

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

not specified Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine

Oct 11, 2013

The Ile609Leu variant in DNAI1 has not been previously identified in individuals with pulmonary disease or in large population studies. This residue is poorly c onserved in evolution, suggesting that the change may be tolerated. Computation al analyses (biochemical amino acid properties, AlignGVGD, PolyPhen2, and SIFT) suggest that the variant may not impact the protein, though this information is not predictive enough to rule out pathogenicity. In summary, additional informat ion is needed to fully assess the clinical significance of this variant. -

Kartagener syndrome Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Counsyl

Mar 30, 2018

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.18
BayesDel_addAF	Benign	-0.078	T
BayesDel_noAF	Benign	-0.35
CADD	Benign	21
DANN	Benign	0.97
DEOGEN2	Benign	0.037	T;T
Eigen	Benign	-0.34
Eigen_PC	Benign	-0.15
FATHMM_MKL	Uncertain	0.85	D
LIST_S2	Uncertain	0.91	D;D
M_CAP	Benign	0.021	T
MetaRNN	Benign	0.35	T;T
MetaSVM	Benign	-0.87	T
MutationAssessor	Benign	0.62	.;N
MutationTaster	Benign	0.99	N
PrimateAI	Uncertain	0.52	T
PROVEAN	Benign	-1.7	.;N
REVEL	Benign	0.11
Sift	Benign	0.049	.;D
Sift4G	Uncertain	0.048	D;D
Polyphen		0.0	.;B
Vest4		0.43
MutPred		0.39		.;Gain of catalytic residue at I609 (P = 0.0497);
MVP		0.78
MPC		0.11
ClinPred		0.77	D
GERP RS		4.7
Varity_R		0.16
gMVP		0.49

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.090		Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

LitVar

Other links and lift over

dbSNP: rs727502978; hg19: chr9-34517289;