chr15-55498326-G-A

Variant names:

Variant summary

Our verdict is Likely benign. The variant received -5 ACMG points: 0P and 5B. BP4BS2

The NM_130810.4(DNAAF4):c.4C>T(p.Pro2Ser) variant causes a missense change. The variant allele was found at a frequency of 0.00119 in 1,601,526 control chromosomes in the GnomAD database, including 6 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. P2T) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.00071 ( 0 hom., cov: 32)

Exomes 𝑓: 0.0012 ( 6 hom. )

Consequence

DNAAF4
NM_130810.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:4

Conservation

PhyloP100: 5.14

Publications

5 publications found

Variant links:

Genes affected

DNAAF4 (HGNC:21493): (dynein axonemal assembly factor 4) This gene encodes a tetratricopeptide repeat domain-containing protein. The encoded protein interacts with estrogen receptors and the heat shock proteins, Hsp70 and Hsp90. An homologous protein in rat has been shown to function in neuronal migration in the developing neocortex. A chromosomal translocation involving this gene is associated with a susceptibility to developmental dyslexia. Mutations in this gene are associated with deficits in reading and spelling. Alternative splicing results in multiple transcript variants. Read-through transcription also exists between this gene and the downstream cell cycle progression 1 (CCPG1) gene. [provided by RefSeq, Mar 2011]

DNAAF4 links:

DNAAF4-CCPG1 (HGNC:43019): (DNAAF4-CCPG1 readthrough (NMD candidate)) This locus represents naturally occurring read-through transcription between the neighboring dyslexia susceptibility 1 candidate 1 (DYX1C1) and cell cycle progression 1 (CCPG1) genes on chromosome 15. The read-through transcript is a candidate for nonsense-mediated mRNA decay (NMD), and is thus unlikely to produce a protein product. [provided by RefSeq, Mar 2011]

DNAAF4-CCPG1 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -5 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.29970178).

BS2

High Homozygotes in GnomAdExome4 at 6 AR,AD gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
DNAAF4	NM_130810.4 link	c.4C>T	p.Pro2Ser	missense_variant	Exon 2 of 10	ENST00000321149.7	NP_570722.2	Q8WXU2-1
DNAAF4	NM_001033560.2 link	c.4C>T	p.Pro2Ser	missense_variant	Exon 2 of 9		NP_001028732.1	Q8WXU2-2A0A0S2Z5Z4
DNAAF4	NM_001033559.3 link	c.4C>T	p.Pro2Ser	missense_variant	Exon 2 of 9		NP_001028731.1	Q8WXU2-3
DNAAF4-CCPG1	NR_037923.1 link	n.259C>T		non_coding_transcript_exon_variant	Exon 1 of 16

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
DNAAF4	ENST00000321149.7 link	c.4C>T	p.Pro2Ser	missense_variant	Exon 2 of 10	1	NM_130810.4	ENSP00000323275.3		Q8WXU2-1

Frequencies

GnomAD3 genomes

AF:

0.000710

AC:

108

AN:

152194

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000362

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000262

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.000471

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00121

Gnomad OTH

AF:

0.000955

GnomAD2 exomes

AF:

0.000559

AC:

134

AN:

239698

AF XY:

0.000577

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.000380

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.000232

Gnomad NFE exome

AF:

0.00106

Gnomad OTH exome

AF:

0.000174

GnomAD4 exome

AF:

0.00124

AC:

1797

AN:

1449214

Hom.:

Cov.:

AF XY:

0.00113

AC XY:

814

AN XY:

719562

show subpopulations

African (AFR)

AF:

0.0000913

AC:

AN:

32874

American (AMR)

AF:

0.000370

AC:

AN:

43200

Ashkenazi Jewish (ASJ)

AF:

0.0000386

AC:

AN:

25894

East Asian (EAS)

AF:

0.00

AC:

AN:

38766

South Asian (SAS)

AF:

0.00

AC:

AN:

84994

European-Finnish (FIN)

AF:

0.000544

AC:

AN:

53334

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5708

European-Non Finnish (NFE)

AF:

0.00152

AC:

1674

AN:

1104572

Other (OTH)

AF:

0.00124

AC:

AN:

59872

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.485

Heterozygous variant carriers

113

226

338

451

564

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

Variant carriers

120

180

240

300

<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

AF:

0.000709

AC:

108

AN:

152312

Hom.:

Cov.:

AF XY:

0.000604

AC XY:

AN XY:

74474

show subpopulations

African (AFR)

AF:

0.000361

AC:

AN:

41578

American (AMR)

AF:

0.000262

AC:

AN:

15296

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3466

East Asian (EAS)

AF:

0.00

AC:

AN:

5170

South Asian (SAS)

AF:

0.00

AC:

AN:

4832

European-Finnish (FIN)

AF:

0.000471

AC:

AN:

10618

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.00121

AC:

AN:

68030

Other (OTH)

AF:

0.000945

AC:

AN:

2116

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.506

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome 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

Alfa

AF:

0.000947

Hom.:

Bravo

AF:

0.000714

TwinsUK

AF:

0.00243

AC:

ALSPAC

AF:

0.00130

AC:

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.00175

AC:

ExAC

AF:

0.000585

AC:

Asia WGS

AF:

0.000289

AC:

AN:

3478

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:4

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Uncertain:2

Sep 01, 2022

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This sequence change replaces proline, which is neutral and non-polar, with serine, which is neutral and polar, at codon 2 of the DNAAF4 protein (p.Pro2Ser). This variant is present in population databases (rs143493699, gnomAD 0.1%), and has an allele count higher than expected for a pathogenic variant. This variant has not been reported in the literature in individuals affected with DNAAF4-related conditions. ClinVar contains an entry for this variant (Variation ID: 578519). Algorithms developed to predict the effect of missense changes on protein structure and function are either unavailable or do not agree on the potential impact of this missense change (SIFT: "Deleterious"; PolyPhen-2: "Probably Damaging"; Align-GVGD: "Class C0"). Algorithms developed to predict the effect of sequence changes on RNA splicing suggest that this variant may create or strengthen a splice site. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

Breakthrough Genomics, Breakthrough Genomics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:not provided

- -

Primary ciliary dyskinesia

Uncertain:1

Sep 26, 2018

UNC Molecular Genetics Laboratory, University of North Carolina at Chapel Hill

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Dyslexia, susceptibility to, 1;C3809641:Primary ciliary dyskinesia 25

Uncertain:1

Nov 18, 2021

Fulgent Genetics, Fulgent Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.29

BayesDel_addAF

Benign

-0.22

BayesDel_noAF

Benign

-0.10

CADD

Uncertain

(source)

DANN

Pathogenic

1.0

DEOGEN2

Benign

0.22

.;.;T;T

Eigen

Pathogenic

0.69

Eigen_PC

Uncertain

0.61

FATHMM_MKL

Uncertain

0.93

LIST_S2

Benign

0.82

T;T;T;.

M_CAP

Benign

0.010

MetaRNN

Benign

0.30

T;T;T;T

MetaSVM

Benign

-0.70

PhyloP100

5.1

PrimateAI

Uncertain

0.55

PROVEAN

Pathogenic

-6.5

D;D;D;D

REVEL

Benign

0.27

Sift

Pathogenic

0.0

D;D;D;D

Sift4G

Pathogenic

0.0

D;D;D;D

Polyphen

1.0

D;D;D;D

Vest4

0.64

MVP

0.80

MPC

0.33

ClinPred

0.25

GERP RS

4.9

PromoterAI

0.0057

Neutral

(source)

Varity_R

0.72

gMVP

0.60

Mutation Taster

=48/52

disease causing

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.010

Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over