14-49633463-C-A

Position:

chr14-49633463-C-A

Variant summary

Our verdict is Benign. Variant got -13 ACMG points: 0P and 13B. BP4_StrongBP6BS1BS2

The NM_018139.3(DNAAF2):c.1687G>T(p.Ala563Ser) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000119 in 1,614,036 control chromosomes in the GnomAD database, including 2 homozygotes. In-silico tool predicts a benign outcome for this variant. 15/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars). Synonymous variant affecting the same amino acid position (i.e. A563A) has been classified as Likely benign.

Frequency

Genomes: 𝑓 0.00024 ( 0 hom., cov: 33)

Exomes 𝑓: 0.00011 ( 2 hom. )

Consequence

DNAAF2
NM_018139.3 missense

Scores

Clinical Significance

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

Conservation

PhyloP100: 0.459

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:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -13 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.0070343316).

BP6

Variant 14-49633463-C-A is Benign according to our data. Variant chr14-49633463-C-A is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 313277.We mark this variant Likely_benign, oryginal submissions are: {Likely_benign=1, Uncertain_significance=1, Benign=1}.

BS1

Variant frequency is greater than expected in population eas. gnomad4 allele frequency = 0.000243 (37/152324) while in subpopulation EAS AF= 0.00618 (32/5182). AF 95% confidence interval is 0.00449. There are 0 homozygotes in gnomad4. There are 19 alleles in male gnomad4 subpopulation. Median coverage is 33. This position pass quality control queck.

BS2

High Homozygotes in GnomAdExome4 at 2 AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE
DNAAF2	NM_018139.3 linkuse as main transcript	c.1687G>T	p.Ala563Ser	missense_variant	1/3	ENST00000298292.13
DNAAF2	NM_001083908.2 linkuse as main transcript	c.1687G>T	p.Ala563Ser	missense_variant	1/2
DNAAF2	NM_001378453.1 linkuse as main transcript	c.-205+20G>T		intron_variant

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
DNAAF2	ENST00000298292.13 linkuse as main transcript	c.1687G>T	p.Ala563Ser	missense_variant	1/3	1	NM_018139.3	P2	Q9NVR5-1
DNAAF2	ENST00000406043.3 linkuse as main transcript	c.1687G>T	p.Ala563Ser	missense_variant	1/2	1		A2	Q9NVR5-2

Frequencies

GnomAD3 genomes

AF:

0.000237

AC:

AN:

152206

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0000654

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00597

Gnomad SAS

AF:

0.000828

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.000350

AC:

AN:

251114

Hom.:

AF XY:

0.000295

AC XY:

AN XY:

135728

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00435

Gnomad SAS exome

AF:

0.000261

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.000106

AC:

155

AN:

1461712

Hom.:

Cov.:

AF XY:

0.000111

AC XY:

AN XY:

727138

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00292

Gnomad4 SAS exome

AF:

0.000325

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

8.99e-7

Gnomad4 OTH exome

AF:

0.000166

GnomAD4 genome

AF:

0.000243

AC:

AN:

152324

Hom.:

Cov.:

AF XY:

0.000255

AC XY:

AN XY:

74492

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.0000653

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00618

Gnomad4 SAS

AF:

0.000829

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000178

Hom.:

Bravo

AF:

0.000234

ExAC

AF:

0.000313

AC:

Asia WGS

AF:

0.00202

AC:

AN:

3478

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	Nov 20, 2023	- -
Benign, criteria provided, single submitter	clinical testing	Ambry Genetics	Feb 09, 2017	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. -

Primary ciliary dyskinesia 10

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Jan 12, 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. -

DNAAF2-related disorder

Benign:1

Likely benign, no assertion criteria provided

clinical testing

PreventionGenetics, part of Exact Sciences

Apr 29, 2022

This variant is classified as likely benign based on ACMG/AMP sequence variant interpretation guidelines (Richards et al. 2015 PMID: 25741868, with internal and published modifications). -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.074

BayesDel_addAF

Benign

-0.57

BayesDel_noAF

Benign

-0.58

CADD

Benign

DANN

Benign

0.95

DEOGEN2

Benign

0.00027

T;.

Eigen

Benign

-0.87

Eigen_PC

Benign

-0.74

FATHMM_MKL

Benign

0.30

LIST_S2

Benign

0.47

T;T

M_CAP

Benign

0.012

MetaRNN

Benign

0.0070

T;T

MetaSVM

Benign

-0.96

MutationAssessor

Benign

0.55

N;N

MutationTaster

Benign

1.0

N;N

PrimateAI

Benign

0.31

PROVEAN

Benign

0.48

N;N

REVEL

Benign

0.018

Sift

Benign

0.043

D;T

Sift4G

Benign

0.26

T;T

Polyphen

0.0010

B;B

Vest4

0.043

MVP

0.16

MPC

0.47

ClinPred

0.049

GERP RS

1.5

Varity_R

0.067

gMVP

0.25

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

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