Genetic Variant DDX31:p.Arg510Gln (chr9-132630366-C-T) – ACMG Classification: Uncertain_significance (4 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 4 ACMG points: 4P and 0B. PP3_Strong

The NM_022779.9(DDX31):c.1529G>A(p.Arg510Gln) variant causes a missense change. The variant allele was found at a frequency of 0.0000268 in 1,603,488 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic 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. R510W) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.000033 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000026 ( 0 hom. )

Consequence

DDX31
NM_022779.9 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 6.17

Publications

0 publications found

Variant links:

Genes affected

DDX31 (HGNC:16715): (DEAD-box helicase 31) DEAD box proteins, characterized by the conserved motif Asp-Glu-Ala-Asp (DEAD), are putative RNA helicases. They are implicated in a number of cellular processes involving alteration of RNA secondary structure such as translation initiation, nuclear and mitochondrial splicing, and ribosome and spliceosome assembly. Based on their distribution patterns, some members of this DEAD box protein family are believed to be involved in embryogenesis, spermatogenesis, and cellular growth and division. This gene encodes a member of this family. The function of this member has not been determined. Alternative splicing of this gene generates multiple transcript variants encoding different isoforms. [provided by RefSeq, Apr 2016]

DDX31 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 4 ACMG points.

PP3

MetaRNN computational evidence supports a deleterious effect, 0.944

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
DDX31	NM_022779.9 link	c.1529G>A	p.Arg510Gln	missense_variant	Exon 16 of 20	ENST00000372159.8	NP_073616.7	Q9H8H2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
DDX31	ENST00000372159.8 link	c.1529G>A	p.Arg510Gln	missense_variant	Exon 16 of 20	1	NM_022779.9	ENSP00000361232.4		Q9H8H2

Frequencies

GnomAD3 genomes

AF:

0.0000329

AC:

AN:

152146

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000483

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.000193

Gnomad SAS

AF:

0.000207

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000147

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.0000479

AC:

AN:

250744

AF XY:

0.0000590

show subpopulations

Gnomad AFR exome

AF:

0.0000616

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.0000544

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.000164

GnomAD4 exome

AF:

0.0000262

AC:

AN:

1451224

Hom.:

Cov.:

AF XY:

0.0000361

AC XY:

AN XY:

719948

show subpopulations

African (AFR)

AF:

0.0000300

AC:

AN:

33364

American (AMR)

AF:

0.00

AC:

AN:

44528

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26012

East Asian (EAS)

AF:

0.0000254

AC:

AN:

39398

South Asian (SAS)

AF:

0.000187

AC:

AN:

85568

European-Finnish (FIN)

AF:

0.0000751

AC:

AN:

53282

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5734

European-Non Finnish (NFE)

AF:

0.0000127

AC:

AN:

1103406

Other (OTH)

AF:

0.0000334

AC:

AN:

59932

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.442

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

AF:

0.0000328

AC:

AN:

152264

Hom.:

Cov.:

AF XY:

0.0000269

AC XY:

AN XY:

74438

show subpopulations

African (AFR)

AF:

0.0000481

AC:

AN:

41542

American (AMR)

AF:

0.00

AC:

AN:

15306

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3472

East Asian (EAS)

AF:

0.000193

AC:

AN:

5182

South Asian (SAS)

AF:

0.000208

AC:

AN:

4816

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10604

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.0000147

AC:

AN:

68022

Other (OTH)

AF:

0.00

AC:

AN:

2114

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.425

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:

0.0000329

Hom.:

Bravo

AF:

0.0000151

ExAC

AF:

0.0000659

AC:

Asia WGS

AF:

0.000289

AC:

AN:

3478

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

May 05, 2023

Ambry Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The c.1844G>A (p.R615Q) alteration is located in exon 16 (coding exon 16) of the DDX31 gene. This alteration results from a G to A substitution at nucleotide position 1844, causing the arginine (R) at amino acid position 615 to be replaced by a glutamine (Q). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Uncertain

0.52

BayesDel_addAF

Pathogenic

0.21

BayesDel_noAF

Pathogenic

0.37

CADD

Pathogenic

(source)

DANN

Pathogenic

1.0

DEOGEN2

Uncertain

0.54

D;D;.

Eigen

Pathogenic

0.91

Eigen_PC

Pathogenic

0.84

FATHMM_MKL

Uncertain

0.97

LIST_S2

Pathogenic

0.99

.;D;D

M_CAP

Uncertain

0.18

MetaRNN

Pathogenic

0.94

D;D;D

MetaSVM

Uncertain

0.76

PhyloP100

6.2

PrimateAI

Uncertain

0.63

PROVEAN

Uncertain

-3.8

D;.;.

REVEL

Pathogenic

0.89

Sift

Pathogenic

0.0

D;.;.

Sift4G

Uncertain

0.0070

D;D;D

Polyphen

1.0

D;D;.

Vest4

0.99

MVP

0.96

MPC

0.70

ClinPred

0.91

GERP RS

5.5

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.76

gMVP

0.85

Mutation Taster

=49/51

disease causing

(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

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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