14-49634727-G-A

Position:

chr14-49634727-G-A

Variant summary

Our verdict is Likely benign. Variant got -6 ACMG points: 2P and 8B. PM2BP4_ModerateBP6BP7BS1

The NM_018139.3(DNAAF2):c.423C>T(p.Val141=) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00106 in 1,605,600 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

Frequency

Genomes: 𝑓 0.00058 ( 0 hom., cov: 35)

Exomes 𝑓: 0.0011 ( 1 hom. )

Consequence

DNAAF2
NM_018139.3 synonymous

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:1B:3

Conservation

PhyloP100: 0.0910

Variant links:

Genes affected

DNAAF2 (HGNC:20188): (dynein axonemal assembly factor 2) This gene encodes a highly conserved protein involved in the preassembly of dynein arm complexes which power cilia. These complexes are found in some cilia and are assembled in the cytoplasm prior to transport for cilia formation. Mutations in this gene have been associated with primary ciliary dyskinesia. Multiple transcript variants encoding different isoforms have been found for this gene.[provided by RefSeq, Oct 2009]

DNAAF2 links:

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ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -6 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.43).

BP6

Variant 14-49634727-G-A is Benign according to our data. Variant chr14-49634727-G-A is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 227314.We mark this variant Likely_benign, oryginal submissions are: {Likely_benign=3, Uncertain_significance=1}.

BP7

Synonymous conserved (PhyloP=0.091 with no splicing effect.

BS1

Variant frequency is greater than expected in population nfe. gnomad4 allele frequency = 0.000584 (89/152368) while in subpopulation NFE AF= 0.000882 (60/68032). AF 95% confidence interval is 0.000703. There are 0 homozygotes in gnomad4. There are 41 alleles in male gnomad4 subpopulation. Median coverage is 35. This position pass quality control queck.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
DNAAF2	NM_018139.3 linkuse as main transcript	c.423C>T	p.Val141=	synonymous_variant	1/3	ENST00000298292.13	NP_060609.2
DNAAF2	NM_001083908.2 linkuse as main transcript	c.423C>T	p.Val141=	synonymous_variant	1/2		NP_001077377.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
DNAAF2	ENST00000298292.13 linkuse as main transcript	c.423C>T	p.Val141=	synonymous_variant	1/3	1	NM_018139.3	ENSP00000298292	P2	Q9NVR5-1
DNAAF2	ENST00000406043.3 linkuse as main transcript	c.423C>T	p.Val141=	synonymous_variant	1/2	1		ENSP00000384862	A2	Q9NVR5-2

Frequencies

GnomAD3 genomes

AF:

0.000585

AC:

AN:

152250

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000265

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000458

Gnomad ASJ

AF:

0.00288

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.0000941

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000882

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.000782

AC:

181

AN:

231512

Hom.:

AF XY:

0.000774

AC XY:

AN XY:

127948

show subpopulations

Gnomad AFR exome

AF:

0.000351

Gnomad AMR exome

AF:

0.000235

Gnomad ASJ exome

AF:

0.00279

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.0000990

Gnomad FIN exome

AF:

0.000124

Gnomad NFE exome

AF:

0.00127

Gnomad OTH exome

AF:

0.000699

GnomAD4 exome

AF:

0.00111

AC:

1616

AN:

1453232

Hom.:

Cov.:

AF XY:

0.00109

AC XY:

790

AN XY:

723268

show subpopulations

Gnomad4 AFR exome

AF:

0.000179

Gnomad4 AMR exome

AF:

0.000247

Gnomad4 ASJ exome

AF:

0.00322

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000812

Gnomad4 FIN exome

AF:

0.000349

Gnomad4 NFE exome

AF:

0.00128

Gnomad4 OTH exome

AF:

0.00121

GnomAD4 genome

AF:

0.000584

AC:

AN:

152368

Hom.:

Cov.:

AF XY:

0.000550

AC XY:

AN XY:

74508

show subpopulations

Gnomad4 AFR

AF:

0.000264

Gnomad4 AMR

AF:

0.000457

Gnomad4 ASJ

AF:

0.00288

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.0000941

Gnomad4 NFE

AF:

0.000882

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.00138

Hom.:

Bravo

AF:

0.000654

Asia WGS

AF:

0.000289

AC:

AN:

3478

EpiCase

AF:

0.000981

EpiControl

AF:

0.00131

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:1Benign:3

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

Primary ciliary dyskinesia

Benign:2

Likely benign, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Jan 12, 2024	- -
Likely benign, criteria provided, single submitter	clinical testing	Ambry Genetics	Aug 26, 2015	This alteration is classified as likely 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. -

Primary ciliary dyskinesia 10

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Jan 13, 2018

This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score, this variant could not be ruled out of causing disease and therefore its association with disease required further investigation. A literature search was performed for the gene, cDNA change, and amino acid change (if applicable). No publications were found based on this search. This variant was therefore classified as a variant of unknown significance for this disease. -

not specified

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine

May 11, 2015

p.Val141Val in exon 1 of DNAAF2: This variant is not expected to have clinical s ignificance because it does not alter an amino acid residue and is not located w ithin the splice consensus sequence. It has been identified in 0.1% (72/51640) o f European chromosomes by the Exome Aggregation Consortium (ExAC, http://exac.br oadinstitute.org; dbSNP rs373251065). -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.43

CADD

Benign

9.6

DANN

Benign

0.92

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

LitVar

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over