NM_018665.3:c.1873A>T

Variant names:

• chr6-73416152-A-T
• rs311686
• NM_018665.3:c.1873A>T

Variant summary

Our verdict is Uncertain significance. The variant received 2 ACMG points: 2P and 0B. PM2

The NM_018665.3(DDX43):​c.1873A>T​(p.Lys625*) variant causes a stop gained change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Variant results in nonsense mediated mRNA decay.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0 (0 hom.)
  • Failed GnomAD Quality Control
• Consequence: DDX43 NM_018665.3 stop_gained
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 2.59
• Publications: 45 publications found

Genes affected

DDX43 (HGNC:18677): (DEAD-box helicase 43) The protein encoded by this gene is an ATP-dependent RNA helicase in the DEAD-box family and displays tumor-specific expression. [provided by RefSeq, Jul 2008]

CGAS (HGNC:21367): (cyclic GMP-AMP synthase) Enables several functions, including 2',3'-cyclic GMP-AMP synthase activity; chromatin binding activity; and phosphatidylinositol-4,5-bisphosphate binding activity. Involved in several processes, including cellular response to exogenous dsRNA; positive regulation of intracellular signal transduction; and regulation of defense response. Located in several cellular components, including cytosol; nucleus; and site of double-strand break. [provided by Alliance of Genome Resources, Apr 2022]

ACMG classification

Our verdict: Uncertain_significance. The variant received 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_018665.3. 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
	DDX43	NM_018665.3	MANE Select	c.1873A>T	p.Lys625*	stop_gained	Exon 16 of 17	NP_061135.2

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	DDX43	ENST00000370336.5	TSL:1 MANE Select	c.1873A>T	p.Lys625*	stop_gained	Exon 16 of 17	ENSP00000359361.4
	CGAS	ENST00000370318.5	TSL:1	c.1333-2131T>A		intron	N/A	ENSP00000359342.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Data not reliable, filtered out with message: AC0 AF: 0.00 AC: 0 AN: 1434452 Hom.: 0 Cov.: 29 AF XY: 0.00 AC XY: 0 AN XY: 715264

African (AFR) AF: 0.00 AC: 0 AN: 33134

American (AMR) AF: 0.00 AC: 0 AN: 44660

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 25992

East Asian (EAS) AF: 0.00 AC: 0 AN: 39516

South Asian (SAS) AF: 0.00 AC: 0 AN: 85636

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53370

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5726

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1086900

Other (OTH) AF: 0.00 AC: 0 AN: 59518

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Pathogenic	0.51	D
BayesDel_noAF	Pathogenic	0.50
CADD	Pathogenic	36
DANN	Uncertain	0.99
Eigen	Uncertain	0.32
Eigen_PC	Benign	0.070
FATHMM_MKL	Uncertain	0.86	D
PhyloP100		2.6
Vest4		0.064
GERP RS		4.1
Mutation Taster		=121/79	disease causing (fs/PTC)

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.25		Details are displayed if max score is > 0.2
DS_AL_spliceai		0.25		Position offset: -39

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

Other links and lift over

dbSNP: rs311686; hg19: chr6-74125875;