9-34459027-G-A

Variant names:

• chr9-34459027-G-A
• NM_012144.4:c.22G>A

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2 BP4_Strong

The NM_012144.4(DNAI1):​c.22G>A​(p.Ala8Thr) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000684 in 1,461,836 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 16/21 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. A8S) has been classified as Benign.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 6.8e-7 (0 hom.)
• Consequence: DNAI1 NM_012144.4 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 2.40

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 Likely_benign. Variant got -2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.06535941).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
DNAI1	NM_012144.4	c.22G>A	p.Ala8Thr	missense_variant	Exon 1 of 20	ENST00000242317.9	NP_036276.1
DNAI1	NM_001281428.2	c.22G>A	p.Ala8Thr	missense_variant	Exon 1 of 20		NP_001268357.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
DNAI1	ENST00000242317.9	c.22G>A	p.Ala8Thr	missense_variant	Exon 1 of 20	1	NM_012144.4	ENSP00000242317.4
DNAI1	ENST00000614641.4	c.22G>A	p.Ala8Thr	missense_variant	Exon 1 of 20	5		ENSP00000480538.1
DNAI1	ENST00000437363.5	c.22G>A	p.Ala8Thr	missense_variant	Exon 1 of 9	5		ENSP00000395396.1
DNAI1	ENST00000470982.5	n.47+1567G>A		intron_variant	Intron 1 of 4	5

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 6.84e-7 AC: 1 AN: 1461836 Hom.: 0 Cov.: 31 AF XY: 0.00000138 AC XY: 1 AN XY: 727218

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: 8.99e-7

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.078
BayesDel_addAF	Benign	-0.15	T
BayesDel_noAF	Benign	-0.46
CADD	Benign	12
DANN	Benign	0.89
DEOGEN2	Benign	0.012	T;T;T
Eigen	Benign	-1.1
Eigen_PC	Benign	-0.99
FATHMM_MKL	Benign	0.0038	N
LIST_S2	Benign	0.32	T;T;T
M_CAP	Benign	0.020	T
MetaRNN	Benign	0.065	T;T;T
MetaSVM	Benign	-0.92	T
MutationAssessor	Benign	0.0	.;.;N
PrimateAI	Benign	0.38	T
PROVEAN	Benign	-0.64	.;N;N
REVEL	Benign	0.20
Sift	Benign	0.36	.;T;T
Sift4G	Benign	0.31	T;T;T
Polyphen		0.0	.;.;B
Vest4		0.18
MutPred		0.060		Gain of phosphorylation at A8 (P = 0.0096);Gain of phosphorylation at A8 (P = 0.0096);Gain of phosphorylation at A8 (P = 0.0096);
MVP		0.58
MPC		0.11
ClinPred		0.11	T
GERP RS		2.6
Varity_R		0.036
gMVP		0.14

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.0		Details are displayed if max score is > 0.2

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

Publications

No publications associated with this variant yet.

Other links and lift over

hg19: chr9-34459025;