5-55787916-T-C

Variant summary

Our verdict is Benign. Variant got -8 ACMG points: 0P and 8B. BP4_Strong BS2

The NM_024415.3(DDX4):c.1088T>C(p.Leu363Ser) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000239 in 1,613,872 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 12/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: 𝑓 0.00020 (0 hom., cov: 32)
  • Exomes 𝑓: 0.00024 (0 hom.)
• Consequence: DDX4 NM_024415.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 1.75

Genes affected

DDX4 (HGNC:18700): (DEAD-box helicase 4) 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 family are believed to be involved in embryogenesis, spermatogenesis, and cellular growth and division. This gene encodes a DEAD box protein, which is a homolog of VASA proteins in Drosophila and several other species. The gene is specifically expressed in the germ cell lineage in both sexes and functions in germ cell development. Multiple transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Oct 2009]

ACMG classification

Verdict is Benign. Variant got -8 ACMG points.

• BP4: Computational evidence support a benign effect (MetaRNN=0.03963867).
• BS2: High AC in GnomAd at 31 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
DDX4	NM_024415.3	c.1088T>C	p.Leu363Ser	missense_variant	15/22	ENST00000505374.6

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
DDX4	ENST00000505374.6	c.1088T>C	p.Leu363Ser	missense_variant	15/22	1	NM_024415.3	P1

Frequencies

GnomAD3 genomes AF: 0.000204 AC: 31 AN: 152184 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.0000241

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00

Gnomad ASJ AF: 0.000576

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.000282

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.000367

Gnomad OTH AF: 0.00

GnomAD3 exomes AF: 0.000183 AC: 46 AN: 251184 Hom.: 0 AF XY: 0.000155 AC XY: 21 AN XY: 135760

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.000695

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.00

Gnomad FIN exome AF: 0.000231

Gnomad NFE exome AF: 0.000291

Gnomad OTH exome AF: 0.000163

GnomAD4 exome AF: 0.000243 AC: 355 AN: 1461688 Hom.: 0 Cov.: 30 AF XY: 0.000249 AC XY: 181 AN XY: 727154

Gnomad4 AFR exome AF: 0.0000299

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.000612

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.000674

Gnomad4 NFE exome AF: 0.000263

Gnomad4 OTH exome AF: 0.000149

GnomAD4 genome AF: 0.000204 AC: 31 AN: 152184 Hom.: 0 Cov.: 32 AF XY: 0.000188 AC XY: 14 AN XY: 74348

Gnomad4 AFR AF: 0.0000241

Gnomad4 AMR AF: 0.00

Gnomad4 ASJ AF: 0.000576

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.00

Gnomad4 FIN AF: 0.000282

Gnomad4 NFE AF: 0.000367

Gnomad4 OTH AF: 0.00

Alfa AF: 0.000321 Hom.: 0

Bravo AF: 0.000178

TwinsUK AF: 0.000270 AC: 1

ALSPAC AF: 0.000259 AC: 1

ESP6500AA AF: 0.000227 AC: 1

ESP6500EA AF: 0.000233 AC: 2

ExAC AF: 0.000198 AC: 24

EpiCase AF: 0.000273

EpiControl AF: 0.0000593

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Jul 09, 2021

The c.1088T>C (p.L363S) alteration is located in exon 15 (coding exon 14) of the DDX4 gene. This alteration results from a T to C substitution at nucleotide position 1088, causing the leucine (L) at amino acid position 363 to be replaced by a serine (S). 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	Benign	0.19
BayesDel_addAF	Benign	-0.37	T
BayesDel_noAF	Benign	-0.46
Cadd	Uncertain	23
Dann	Uncertain	1.0
Eigen	Benign	-0.31
Eigen_PC	Benign	-0.17
FATHMM_MKL	Benign	0.13	N
LIST_S2	Benign	0.77	T;T;T;T;.;T
M_CAP	Benign	0.015	T
MetaRNN	Benign	0.040	T;T;T;T;T;T
MetaSVM	Benign	-1.1	T
MutationTaster	Benign	1.0	N;N;N;N;N
PrimateAI	Benign	0.46	T
PROVEAN	Uncertain	-2.9	D;D;D;D;D;D
REVEL	Benign	0.12
Sift	Benign	0.14	T;T;T;T;T;T
Sift4G	Benign	0.49	T;T;T;T;T;T
Polyphen		0.0070, 0.60	.;B;P;.;B;.
Vest4		0.38
MVP		0.28
MPC		0.33
ClinPred		0.066	T
GERP RS		4.4
Varity_R		0.13
gMVP		0.79

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

Other links and lift over

dbSNP: rs142659936; hg19: chr5-55083744;