17-63808827-C-G

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 3P and 1B. PM2 PP2 BP4

The NM_203499.3(DDX42):c.1031C>G(p.Ala344Gly) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: DDX42 NM_203499.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 4.10

Genes affected

DDX42 (HGNC:18676): (DEAD-box helicase 42) This gene encodes a member of the Asp-Glu-Ala-Asp (DEAD) box protein family. Members of this protein family are putative RNA helicases, and 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. Members of this family are believed to be involved in embryogenesis, spermatogenesis, and cellular growth and division. Two transcript variants encoding the same protein have been identified for this gene. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Uncertain_significance. Variant got 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP2: Missense variant where missense usually causes diseases, DDX42
• BP4: Computational evidence support a benign effect (MetaRNN=0.2919192).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
DDX42	NM_203499.3	c.1031C>G	p.Ala344Gly	missense_variant	10/18	ENST00000389924.7

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
DDX42	ENST00000389924.7	c.1031C>G	p.Ala344Gly	missense_variant	10/18	5	NM_203499.3	P1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 30

GnomAD4 genome Cov.: 32

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

Apr 05, 2023

The c.1031C>G (p.A344G) alteration is located in exon 11 (coding exon 9) of the DDX42 gene. This alteration results from a C to G substitution at nucleotide position 1031, causing the alanine (A) at amino acid position 344 to be replaced by a glycine (G). 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	0.11
BayesDel_addAF	Benign	-0.15	T
BayesDel_noAF	Benign	-0.45
Cadd	Uncertain	24
Dann	Uncertain	0.99
DEOGEN2	Benign	0.081	T;T;T;.;T
Eigen	Benign	-0.12
Eigen_PC	Benign	0.11
FATHMM_MKL	Pathogenic	0.98	D
M_CAP	Benign	0.0042	T
MetaRNN	Benign	0.29	T;T;T;T;T
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	0.64	N;N;N;.;.
MutationTaster	Benign	1.0	D;D;D;D;D
PrimateAI	Uncertain	0.60	T
Sift4G	Benign	0.42	T;T;T;T;T
Polyphen		0.0010	B;B;B;.;.
Vest4		0.46
MutPred		0.46		Gain of methylation at K347 (P = 0.1143);Gain of methylation at K347 (P = 0.1143);Gain of methylation at K347 (P = 0.1143);.;.;
MVP		0.52
MPC		1.1
ClinPred		0.63	D
GERP RS		4.8
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.0
Varity_R		0.084
gMVP		0.43

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

No publications associated with this variant yet.

Other links and lift over

hg19: chr17-61886187;