19-55161684-C-CA

Variant names:

• chr19-55161684-C-CA
• rs397515395
• NM_001256715.2:c.621dupT

Variant summary

Our verdict is Pathogenic. The variant received 11 ACMG points: 11P and 0B. PVS1 PM2 PP5

The NM_001256715.2(DNAAF3):​c.621dupT​(p.Val208CysfsTer12) variant causes a frameshift change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000072 in 1,388,030 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Pathogenic (no stars). Variant results in nonsense mediated mRNA decay.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 7.2e-7 (0 hom.)
• Consequence: DNAAF3 NM_001256715.2 frameshift
• Clinical Significance: Pathogenic no assertion criteria provided P:1
• Conservation: PhyloP100: -3.74
• Publications: 4 publications found

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

Our verdict: Pathogenic. The variant received 11 ACMG points.

• PVS1: Loss of function variant, product undergoes nonsense mediated mRNA decay. LoF is a known mechanism of disease.
• PM2: Very rare variant in population databases, with high coverage
• PP5: Variant 19-55161684-C-CA is Pathogenic according to our data. Variant chr19-55161684-C-CA is described in ClinVar as Pathogenic. ClinVar VariationId is 31534.Status of the report is no_assertion_criteria_provided, 0 stars.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001256715.2. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	DNAAF3	NM_001256715.2	MANE Select	c.621dupT	p.Val208CysfsTer12	frameshift	Exon 6 of 12	NP_001243644.1
	DNAAF3	NM_001256714.1		c.825dupT	p.Val276CysfsTer12	frameshift	Exon 6 of 12	NP_001243643.1
	DNAAF3	NM_178837.4		c.762dupT	p.Val255CysfsTer12	frameshift	Exon 6 of 12	NP_849159.2

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	DNAAF3	ENST00000524407.7	TSL:1 MANE Select	c.621dupT	p.Val208CysfsTer12	frameshift	Exon 6 of 12	ENSP00000432046.3
	DNAAF3	ENST00000455045.5	TSL:1	c.459dupT	p.Val154CysfsTer12	frameshift	Exon 6 of 12	ENSP00000394343.1
	DNAAF3	ENST00000528412.5	TSL:1	n.*409dupT		non_coding_transcript_exon	Exon 6 of 12	ENSP00000433826.2

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD2 exomes AF: 0.00000729 AC: 1 AN: 137162 AF XY: 0.0000134

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 7.20e-7 AC: 1 AN: 1388030 Hom.: 0 Cov.: 33 AF XY: 0.00000146 AC XY: 1 AN XY: 684940

⚠️ The allele balance in gnomAD version 4 Exomes is significantly skewed from the expected value of 0.5.

African (AFR) AF: 0.00 AC: 0 AN: 31476

American (AMR) AF: 0.00 AC: 0 AN: 35660

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 25110

East Asian (EAS) AF: 0.00 AC: 0 AN: 35700

South Asian (SAS) AF: 0.0000126 AC: 1 AN: 79108

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 40702

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 4094

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1078480

Other (OTH) AF: 0.00 AC: 0 AN: 57700

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0), which strongly suggests a high chance of mosaicism in these individuals.

GnomAD4 genome Cov.: 32

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:1

Revision: no assertion criteria provided

Submissions by phenotype

Primary ciliary dyskinesia 2 Pathogenic:1

Mar 04, 2012

OMIM

Significance: Pathogenic

Review Status: no assertion criteria provided

Collection Method: literature only

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
PhyloP100		-3.7
Mutation Taster		=1/199	disease causing (ClinVar)

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

Other links and lift over

dbSNP: rs397515395; hg19: chr19-55673052;