1-182858558-C-T

Variant names:

• chr1-182858558-C-T
• NM_001357.5:c.818C>T

Variant summary

Our verdict is Uncertain significance. The variant received 2 ACMG points: 3P and 1B. PM2 PP2 BP4

The NM_001357.5(DHX9):​c.818C>T​(p.Pro273Leu) variant causes a missense change involving the alteration of a non-conserved nucleotide. 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 (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. P273A) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 32)
• Consequence: DHX9 NM_001357.5 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 2.41
• Publications: 0 publications found

Genes affected

DHX9 (HGNC:2750): (DExH-box helicase 9) This gene encodes a member of the DEAH-containing family of RNA helicases. The encoded protein is an enzyme that catalyzes the ATP-dependent unwinding of double-stranded RNA and DNA-RNA complexes. This protein localizes to both the nucleus and the cytoplasm and functions as a transcriptional regulator. This protein may also be involved in the expression and nuclear export of retroviral RNAs. Alternate splicing results in multiple transcript variants. Pseudogenes of this gene are found on chromosomes 11 and 13.[provided by RefSeq, Feb 2010]

DHX9 Gene-Disease associations (from GenCC):

• intellectual developmental disorder, autosomal dominant 75

  Inheritance: AD Classification: MODERATE Submitted by: G2P

ACMG classification

Our verdict: Uncertain_significance. The variant received 2 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 2 curated pathogenic missense variants (we use a threshold of 10). The gene has 0 curated benign missense variants. Gene score misZ: 5.8433 (above the threshold of 3.09). Trascript score misZ: 7.2163 (above the threshold of 3.09). GenCC associations: The gene is linked to intellectual developmental disorder, autosomal dominant 75.
• BP4: Computational evidence support a benign effect (MetaRNN=0.40838858).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001357.5. 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
	DHX9	NM_001357.5	MANE Select	c.818C>T	p.Pro273Leu	missense	Exon 9 of 28	NP_001348.2	Q08211-1
	DHX9	NR_033302.2		n.1087C>T		non_coding_transcript_exon	Exon 10 of 29

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	DHX9	ENST00000367549.4	TSL:1 MANE Select	c.818C>T	p.Pro273Leu	missense	Exon 9 of 28	ENSP00000356520.3	Q08211-1
	DHX9	ENST00000926361.1		c.818C>T	p.Pro273Leu	missense	Exon 9 of 28	ENSP00000596420.1
	DHX9	ENST00000926363.1		c.818C>T	p.Pro273Leu	missense	Exon 10 of 29	ENSP00000596422.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 32

ClinVar

ClinVar submissions

Significance: Uncertain significance

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
-	1	-	Inborn genetic diseases (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.20
BayesDel_addAF	Benign	-0.080	T
BayesDel_noAF	Benign	-0.35
CADD	Uncertain	25
DANN	Uncertain	1.0
DEOGEN2	Uncertain	0.49	T
Eigen	Uncertain	0.49
Eigen_PC	Uncertain	0.51
FATHMM_MKL	Uncertain	0.95	D
LIST_S2	Uncertain	0.94	D
M_CAP	Benign	0.014	T
MetaRNN	Benign	0.41	T
MetaSVM	Benign	-1.2	T
MutationAssessor	Uncertain	2.8	M
PhyloP100		2.4
PrimateAI	Uncertain	0.55	T
PROVEAN	Pathogenic	-5.2	D
REVEL	Benign	0.15
Sift	Uncertain	0.0090	D
Sift4G	Benign	0.082	T
Polyphen		0.92	P
Vest4		0.41
MutPred		0.38		Loss of disorder (P = 0.0307)
MVP		0.57
MPC		1.2
ClinPred		0.97	D
GERP RS		5.7
Varity_R		0.19
gMVP		0.68
Mutation Taster		=74/26	polymorphism

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

Other links and lift over

hg19: chr1-182827693;