X-41334280-C-T

Variant names:

• chrX-41334280-C-T
• NM_001356.5:c.28C>T

Variant summary

Our verdict is Uncertain significance. The variant received 1 ACMG points: 3P and 2B. PM2 PP2 BP4_Moderate

The NM_001356.5(DDX3X):​c.28C>T​(p.Leu10Phe) 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. 12/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 24)
• Consequence: DDX3X NM_001356.5 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 6.62
• Publications: 0 publications found

Genes affected

DDX3X (HGNC:2745): (DEAD-box helicase 3 X-linked) The protein encoded by this gene is a member of the large DEAD-box protein family, that is defined by the presence of the conserved Asp-Glu-Ala-Asp (DEAD) motif, and has ATP-dependent RNA helicase activity. This protein has been reported to display a high level of RNA-independent ATPase activity, and unlike most DEAD-box helicases, the ATPase activity is thought to be stimulated by both RNA and DNA. This protein has multiple conserved domains and is thought to play roles in both the nucleus and cytoplasm. Nuclear roles include transcriptional regulation, mRNP assembly, pre-mRNA splicing, and mRNA export. In the cytoplasm, this protein is thought to be involved in translation, cellular signaling, and viral replication. Misregulation of this gene has been implicated in tumorigenesis. This gene has a paralog located in the nonrecombining region of the Y chromosome. Pseudogenes sharing similarity to both this gene and the DDX3Y paralog are found on chromosome 4 and the X chromosome. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Oct 2014]

DDX3X Gene-Disease associations (from GenCC):

• intellectual disability, X-linked 102

  Inheritance: XL Classification: DEFINITIVE, STRONG Submitted by: Ambry Genetics, G2P, Labcorp Genetics (formerly Invitae)
• X-linked syndromic intellectual disability

  Inheritance: XL Classification: DEFINITIVE Submitted by: Illumina, ClinGen
• Toriello-Carey syndrome

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
• X-linked intellectual disability-hypotonia-movement disorder syndrome

  Inheritance: XL Classification: SUPPORTIVE Submitted by: Orphanet

ENSG00000301689 (HGNC:):

ACMG classification

Our verdict: Uncertain_significance. The variant received 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP2: Missense variant in the gene, where a lot of missense mutations are associated with disease in ClinVar. The gene has 93 curated pathogenic missense variants (we use a threshold of 10). The gene has 20 curated benign missense variants. Gene score misZ: 4.3295 (above the threshold of 3.09). Trascript score misZ: NaN (below the threshold of 3.09). GenCC associations: The gene is linked to intellectual disability, X-linked 102, X-linked syndromic intellectual disability, Toriello-Carey syndrome, X-linked intellectual disability-hypotonia-movement disorder syndrome.
• BP4: Computational evidence support a benign effect (MetaRNN=0.22826749).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001356.5. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	DDX3X	NM_001356.5	MANE Select	c.28C>T	p.Leu10Phe	missense	Exon 1 of 17	NP_001347.3
	DDX3X	NM_001193416.3		c.28C>T	p.Leu10Phe	missense	Exon 1 of 17	NP_001180345.1	A0A2R8YFS5
	DDX3X	NM_001193417.3		c.28C>T	p.Leu10Phe	missense	Exon 1 of 16	NP_001180346.1	O00571-2

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	DDX3X	ENST00000644876.2	MANE Select	c.28C>T	p.Leu10Phe	missense	Exon 1 of 17	ENSP00000494040.1	O00571-1
	DDX3X	ENST00000399959.7	TSL:1	c.28C>T	p.Leu10Phe	missense	Exon 1 of 17	ENSP00000382840.3	A0A2U3TZJ9
	DDX3X	ENST00000478993.5	TSL:1	n.28C>T		non_coding_transcript_exon	Exon 1 of 19	ENSP00000478443.1	O00571-1

Frequencies

GnomAD3 genomes Cov.: 24

GnomAD4 exome Cov.: 29

GnomAD4 genome Cov.: 24

ClinVar

ClinVar submissions

Significance: Uncertain significance

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
-	1	-	not provided (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.073
BayesDel_addAF	Benign	-0.25	T
BayesDel_noAF	Benign	-0.60
CADD	Benign	22
DANN	Uncertain	0.99
DEOGEN2	Benign	0.14	T
FATHMM_MKL	Uncertain	0.87	D
LIST_S2	Uncertain	0.88	D
M_CAP	Benign	0.023	T
MetaRNN	Benign	0.23	T
MetaSVM	Benign	-1.1	T
MutationAssessor	Benign	1.9	M
PhyloP100		6.6
PrimateAI	Uncertain	0.62	T
PROVEAN	Benign	-0.52	N
REVEL	Benign	0.080
Sift	Benign	0.74	T
Sift4G	Benign	0.073	T
Polyphen		0.55	P
Vest4		0.36
MutPred		0.35		Gain of catalytic residue at L10 (P = 0.0496)
MVP		0.65
MPC		1.7
ClinPred		0.88	D
GERP RS		4.3
PromoterAI		0.11	Neutral
Varity_R		0.53
gMVP		0.33
Mutation Taster		=65/35	polymorphism

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.010		Details are displayed if max score is > 0.2

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

Other links and lift over

hg19: chrX-41193533;