dbSNP rs146462823: DNAI2:c.468-4G>T (chr17-74289590-G-T) – ACMG Classification: Benign (-13 pts)

Variant summary

Our verdict is Benign. The variant received -13 ACMG points: 0P and 13B. BP4_StrongBP6BS1BS2

The NM_023036.6(DNAI2):c.468-4G>T variant causes a splice region, intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00064 in 1,613,372 control chromosomes in the GnomAD database, including 6 homozygotes. In-silico tool predicts a benign outcome for this variant. 3/3 splice prediction tools predict no significant impact on normal splicing. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

Frequency

Genomes: 𝑓 0.0030 ( 3 hom., cov: 31)

Exomes 𝑓: 0.00039 ( 3 hom. )

Consequence

DNAI2
NM_023036.6 splice_region, intron

Scores

Splicing: ADA: 0.0003451

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:1B:7

Conservation

PhyloP100: 0.0280

Publications

0 publications found

Variant links:

Genes affected

DNAI2 (HGNC:18744): (dynein axonemal intermediate chain 2) The protein encoded by this gene belongs to the dynein intermediate chain family, and is part of the dynein complex of respiratory cilia and sperm flagella. Mutations in this gene are associated with primary ciliary dyskinesia type 9. Alternatively spliced transcript variants encoding different isoforms have been noted for this gene. [provided by RefSeq, Mar 2010]

DNAI2 Gene-Disease associations (from GenCC):

primary ciliary dyskinesia 9
Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: ClinGen, Labcorp Genetics (formerly Invitae)
primary ciliary dyskinesia
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

DNAI2 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -13 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.78).

BP6

Variant 17-74289590-G-T is Benign according to our data. Variant chr17-74289590-G-T is described in ClinVar as Conflicting_classifications_of_pathogenicity. ClinVar VariationId is 325009.

BS1

Variant frequency is greater than expected in population afr. GnomAd4 allele frequency = 0.00301 (457/151622) while in subpopulation AFR AF = 0.0107 (442/41364). AF 95% confidence interval is 0.00986. There are 3 homozygotes in GnomAd4. There are 217 alleles in the male GnomAd4 subpopulation. Median coverage is 31. This position passed quality control check.

BS2

High Homozygotes in GnomAd4 at 3 AR,AD gene

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_023036.6. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Gene	Transcript	Tags	HGVSc	Effect	Exon Rank	Protein	UniProt
DNAI2	NM_023036.6	MANE Select	c.468-4G>T	splice_region intron	N/A	NP_075462.3	Q9GZS0-1
DNAI2	NM_001353167.2		c.468-4G>T	splice_region intron	N/A	NP_001340096.1
DNAI2	NM_001172810.3		c.468-4G>T	splice_region intron	N/A	NP_001166281.1	Q9GZS0-2

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	Effect	Exon Rank	Protein	UniProt
DNAI2	ENST00000311014.11	TSL:1 MANE Select	c.468-4G>T	splice_region intron	N/A	ENSP00000308312.6	Q9GZS0-1
DNAI2	ENST00000579490.5	TSL:1	c.639-4G>T	splice_region intron	N/A	ENSP00000464197.1	J3QRG2
DNAI2	ENST00000446837.2	TSL:1	c.468-4G>T	splice_region intron	N/A	ENSP00000400252.2	Q9GZS0-1

Frequencies

GnomAD3 genomes

AF:

0.00299

AC:

453

AN:

151560

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0106

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000394

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00323

Gnomad NFE

AF:

0.0000883

Gnomad OTH

AF:

0.000964

GnomAD2 exomes

AF:

0.000804

AC:

202

AN:

251348

AF XY:

0.000633

show subpopulations

Gnomad AFR exome

AF:

0.0107

Gnomad AMR exome

AF:

0.000289

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000106

Gnomad OTH exome

AF:

0.00114

GnomAD4 exome

AF:

0.000394

AC:

576

AN:

1461750

Hom.:

Cov.:

AF XY:

0.000374

AC XY:

272

AN XY:

727186

show subpopulations

African (AFR)

AF:

0.0106

AC:

355

AN:

33478

American (AMR)

AF:

0.000470

AC:

AN:

44718

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26136

East Asian (EAS)

AF:

0.00

AC:

AN:

39698

South Asian (SAS)

AF:

0.0000116

AC:

AN:

86258

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53342

Middle Eastern (MID)

AF:

0.00295

AC:

AN:

5762

European-Non Finnish (NFE)

AF:

0.000109

AC:

121

AN:

1111968

Other (OTH)

AF:

0.00101

AC:

AN:

60390

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.475

Heterozygous variant carriers

106

141

176

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

Variant carriers

100

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.00301

AC:

457

AN:

151622

Hom.:

Cov.:

AF XY:

0.00293

AC XY:

217

AN XY:

74020

show subpopulations

African (AFR)

AF:

0.0107

AC:

442

AN:

41364

American (AMR)

AF:

0.000393

AC:

AN:

15262

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3462

East Asian (EAS)

AF:

0.00

AC:

AN:

5156

South Asian (SAS)

AF:

0.00

AC:

AN:

4790

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10346

Middle Eastern (MID)

AF:

0.00350

AC:

AN:

286

European-Non Finnish (NFE)

AF:

0.0000883

AC:

AN:

67954

Other (OTH)

AF:

0.000956

AC:

AN:

2092

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.503

Heterozygous variant carriers

122

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.00220

Hom.:

Bravo

AF:

0.00330

Asia WGS

AF:

0.00173

AC:

AN:

3478

EpiCase

AF:

0.000218

EpiControl

AF:

0.000178

ClinVar

ClinVar submissions

Significance:Conflicting classifications of pathogenicity

Revision:criteria provided, conflicting classifications

View on ClinVar

Pathogenic

VUS

Benign

Condition

Primary ciliary dyskinesia (3)

Primary ciliary dyskinesia 9 (3)

DNAI2-related disorder (1)

not provided (1)

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.78

CADD

Benign

1.9

(source)

DANN

Benign

0.68

PhyloP100

0.028

Mutation Taster

=100/0

polymorphism

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

dbscSNV1_ADA

Benign

0.00035

dbscSNV1_RF

Benign

0.022

SpliceAI score (max)

0.020

Details are displayed if max score is > 0.2

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

Publications

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over