Genetic Variant DNAAF2:p.Ala40Thr (chr14-49635032-C-T) – ACMG Classification: Uncertain_significance (0 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2BP4_Moderate

The NM_018139.3(DNAAF2):c.118G>A(p.Ala40Thr) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000702 in 1,425,142 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. A40S) has been classified as Uncertain significance.

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 7.0e-7 ( 0 hom. )

Consequence

DNAAF2
NM_018139.3 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 1.12

Publications

0 publications found

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 Gene-Disease associations (from GenCC):

primary ciliary dyskinesia 10
Inheritance: AR Classification: DEFINITIVE, STRONG, MODERATE Submitted by: Ambry Genetics, Labcorp Genetics (formerly Invitae), PanelApp Australia, ClinGen
primary ciliary dyskinesia
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

DNAAF2 links:

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ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.22846496).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_018139.3. 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
	DNAAF2	NM_018139.3	MANE Select	c.118G>A	p.Ala40Thr	missense	Exon 1 of 3	NP_060609.2
	DNAAF2	NM_001083908.2		c.118G>A	p.Ala40Thr	missense	Exon 1 of 2	NP_001077377.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	DNAAF2	ENST00000298292.13	TSL:1 MANE Select	c.118G>A	p.Ala40Thr	missense	Exon 1 of 3	ENSP00000298292.8
	DNAAF2	ENST00000406043.3	TSL:1	c.118G>A	p.Ala40Thr	missense	Exon 1 of 2	ENSP00000384862.3

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

7.02e-7

AC:

AN:

1425142

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

705752

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

32560

American (AMR)

AF:

0.00

AC:

AN:

39436

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

25506

East Asian (EAS)

AF:

0.00

AC:

AN:

37468

South Asian (SAS)

AF:

0.00

AC:

AN:

81394

European-Finnish (FIN)

AF:

0.00

AC:

AN:

49626

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5734

European-Non Finnish (NFE)

AF:

9.14e-7

AC:

AN:

1094382

Other (OTH)

AF:

0.00

AC:

AN:

59036

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.475

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome 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

GnomAD4 genome

Cov.:

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.21

BayesDel_addAF

Benign

-0.092

BayesDel_noAF

Benign

-0.37

CADD

Uncertain

(source)

DANN

Uncertain

1.0

DEOGEN2

Benign

0.16

Eigen

Uncertain

0.20

Eigen_PC

Benign

0.17

FATHMM_MKL

Benign

0.35

LIST_S2

Benign

0.75

M_CAP

Benign

0.012

MetaRNN

Benign

0.23

MetaSVM

Benign

-1.0

MutationAssessor

Benign

2.0

PhyloP100

1.1

PrimateAI

Uncertain

0.54

PROVEAN

Uncertain

-2.8

REVEL

Benign

0.048

Sift

Benign

0.035

Sift4G

Pathogenic

0.0

Polyphen

0.95

Vest4

0.17

MutPred

0.35

Gain of phosphorylation at A40 (P = 0.0067)

MVP

0.64

MPC

1.4

ClinPred

0.98

GERP RS

4.2

PromoterAI

-0.014

Neutral

(source)

Varity_R

0.20

gMVP

0.66

Mutation Taster

=92/8

polymorphism

(source)

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

You must be logged in to view publications. This limit was set because tens of millions (!) of queries from AI bots are generated daily.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over