rs201986299

Variant names:

• chr19-55162293-AC-A
• rs201986299
• NM_001256715.2:c.323-4delG

Variant summary

Our verdict is Benign. Variant got -9 ACMG points: 0P and 9B. BP6 BS1 BS2

The NM_001256715.2(DNAAF3):​c.323-4delG variant causes a splice region, intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000999 in 1,249,968 control chromosomes in the GnomAD database, including 11 homozygotes. 1/1 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 0.0050 (9 hom., cov: 33)
  • Exomes 𝑓: 0.00045 (2 hom.)
• Consequence: DNAAF3 NM_001256715.2 splice_region, intron
• Clinical Significance: Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:1 B:3
• Conservation: PhyloP100: -0.987

Genes affected

DNAAF3 (HGNC:30492): (dynein axonemal assembly factor 3) The protein encoded by this gene is required for the assembly of axonemal inner and outer dynein arms and plays a role in assembling dynein complexes for transport into cilia. Defects in this gene are a cause of primary ciliary dyskinesia type 2 (CILD2). Several transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, May 2012]

DNAAF3-AS1 (HGNC:55292): (DNAAF3 antisense RNA 1)

ACMG classification

Verdict is Benign. Variant got -9 ACMG points.

• BP6: Variant 19-55162293-AC-A is Benign according to our data. Variant chr19-55162293-AC-A is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 257687.We mark this variant Likely_benign, oryginal submissions are: {Benign=3, Uncertain_significance=1}. Variant chr19-55162293-AC-A is described in Lovd as [Likely_benign].
• BS1: Variant frequency is greater than expected in population afr. gnomad4 allele frequency = 0.00497 (757/152326) while in subpopulation AFR AF= 0.0175 (726/41568). AF 95% confidence interval is 0.0164. There are 9 homozygotes in gnomad4. There are 346 alleles in male gnomad4 subpopulation. Median coverage is 33. This position pass quality control queck.
• BS2: High Homozygotes in GnomAd4 at 9 AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
DNAAF3	NM_001256715.2	c.323-4delG		splice_region_variant, intron_variant	Intron 4 of 11	ENST00000524407.7	NP_001243644.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
DNAAF3	ENST00000524407.7	c.323-4delG		splice_region_variant, intron_variant	Intron 4 of 11	1	NM_001256715.2	ENSP00000432046.3

Frequencies

GnomAD3 genomes AF: 0.00497 AC: 757 AN: 152208 Hom.: 9 Cov.: 33

Gnomad AFR AF: 0.0175

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00118

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.000207

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00316

Gnomad NFE AF: 0.0000882

Gnomad OTH AF: 0.00287

GnomAD3 exomes AF: 0.00152 AC: 34 AN: 22308 Hom.: 1 AF XY: 0.00138 AC XY: 14 AN XY: 10154

Gnomad AFR exome AF: 0.0202

Gnomad AMR exome AF: 0.00313

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00

Gnomad OTH exome AF: 0.00314

GnomAD4 exome AF: 0.000448 AC: 492 AN: 1097642 Hom.: 2 Cov.: 31 AF XY: 0.000453 AC XY: 235 AN XY: 518306

Gnomad4 AFR exome AF: 0.0167

Gnomad4 AMR exome AF: 0.00127

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: 0.0000402

Gnomad4 OTH exome AF: 0.00118

GnomAD4 genome AF: 0.00497 AC: 757 AN: 152326 Hom.: 9 Cov.: 33 AF XY: 0.00465 AC XY: 346 AN XY: 74488

Gnomad4 AFR AF: 0.0175

Gnomad4 AMR AF: 0.00111

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.000207

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.0000882

Gnomad4 OTH AF: 0.00284

Bravo AF: 0.00558

Asia WGS AF: 0.000577 AC: 2 AN: 3478

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:1 Benign:3

Revision: criteria provided, conflicting classifications

Submissions by phenotype

Primary ciliary dyskinesia Benign:2

Jul 11, 2016

Ambry Genetics

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This alteration is classified as benign based on a combination of the following: seen in unaffected individuals, population frequency, intact protein function, lack of segregation with disease, co-occurrence, RNA analysis, in silico models, amino acid conservation, lack of disease association in case-control studies, and/or the mechanism of disease or impacted region is inconsistent with a known cause of pathogenicity. -

Jan 23, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

not provided Uncertain:1

Nov 06, 2015

Eurofins Ntd Llc (ga)

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

not specified Benign:1

-

PreventionGenetics, part of Exact Sciences

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.040		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: rs201986299; hg19: chr19-55673661;