12-48831248-CTTGAGG-C

Variant summary

Our verdict is Likely pathogenic. Variant got 6 ACMG points: 6P and 0B. PM2PM4PP5_Moderate

The NM_004818.3(DDX23):​c.2127_2132delCCTCAA​(p.Asn709_Leu710del) variant causes a disruptive inframe deletion change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Pathogenic (★).

Frequency

Genomes: not found (cov: 32)

Consequence

DDX23
NM_004818.3 disruptive_inframe_deletion

Scores

Not classified

Clinical Significance

Pathogenic criteria provided, single submitter P:1

Conservation

PhyloP100: 7.40
Variant links:
Genes affected
DDX23 (HGNC:17347): (DEAD-box helicase 23) This gene encodes a member of the DEAD box protein family. 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. The protein encoded by this gene is a component of the U5 snRNP complex; it may facilitate conformational changes in the spliceosome during nuclear pre-mRNA splicing. An alternatively spliced transcript variant has been found for this gene, but its biological validity has not been determined. [provided by RefSeq, Jul 2008]

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ACMG classification

Classification made for transcript

Verdict is Likely_pathogenic. Variant got 6 ACMG points.

PM2
Very rare variant in population databases, with high coverage;
PM4
Nonframeshift variant in NON repetitive region in NM_004818.3.
PP5
Variant 12-48831248-CTTGAGG-C is Pathogenic according to our data. Variant chr12-48831248-CTTGAGG-C is described in ClinVar as [Pathogenic]. Clinvar id is 1313838.Status of the report is criteria_provided_single_submitter, 1 stars.

Transcripts

RefSeq

Gene Transcript HGVSc HGVSp Effect Exon rank MANE Protein UniProt
DDX23NM_004818.3 linkc.2127_2132delCCTCAA p.Asn709_Leu710del disruptive_inframe_deletion Exon 16 of 17 ENST00000308025.8 NP_004809.2 Q9BUQ8-1A0A024R0Z3B3KY11

Ensembl

Gene Transcript HGVSc HGVSp Effect Exon rank TSL MANE Protein Appris UniProt
DDX23ENST00000308025.8 linkc.2127_2132delCCTCAA p.Asn709_Leu710del disruptive_inframe_deletion Exon 16 of 17 1 NM_004818.3 ENSP00000310723.2 Q9BUQ8-1

Frequencies

GnomAD3 genomes
Cov.:
32
We have no GnomAD4 exomes data on this position. Probably position not covered by the project.
GnomAD4 genome
Cov.:
32

ClinVar

Significance: Pathogenic
Submissions summary: Pathogenic:1
Revision: criteria provided, single submitter
LINK: link

Submissions by phenotype

not provided Pathogenic:1
Oct 28, 2022
GeneDx
Significance: Pathogenic
Review Status: criteria provided, single submitter
Collection Method: clinical testing

In-frame deletion of 2 amino acids in a non-repeat region; In silico analysis supports a deleterious effect on protein structure/function; Not observed in large population cohorts (gnomAD); Has not been previously published as pathogenic or benign to our knowledge -

Computational scores

Source: dbNSFP v4.3

Name
Calibrated prediction
Score
Prediction

Splicing

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: chr12-49225031; API