Genetic Variant DHX35:p.Arg217Trp (chr20-39001736-C-T) – ACMG Classification: Uncertain_significance (2 pts)

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PM2

The NM_021931.4(DHX35):c.649C>T(p.Arg217Trp) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000287 in 1,603,226 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.000066 ( 0 hom., cov: 33)

Exomes 𝑓: 0.000025 ( 0 hom. )

Consequence

DHX35
NM_021931.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 3.10

Variant links:

Genes affected

DHX35 (HGNC:15861): (DEAH-box helicase 35) 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 the DEAD box protein family are believed to be involved in embryogenesis, spermatogenesis, and cellular growth and division. The function of this gene product which is a member of this family, has not been determined. Alternatively spliced transcript variants have been found for this gene. [provided by RefSeq, Jun 2010]

DHX35 links:

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ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
DHX35	NM_021931.4 link	c.649C>T	p.Arg217Trp	missense_variant	Exon 9 of 22	ENST00000252011.8	NP_068750.2	Q9H5Z1-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
DHX35	ENST00000252011.8 link	c.649C>T	p.Arg217Trp	missense_variant	Exon 9 of 22	1	NM_021931.4	ENSP00000252011.3		Q9H5Z1-1

Frequencies

GnomAD3 genomes

AF:

0.0000724

AC:

AN:

151944

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000131

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.000193

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00949

Gnomad NFE

AF:

0.0000735

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000286

AC:

AN:

245052

Hom.:

AF XY:

0.0000227

AC XY:

AN XY:

132108

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000301

Gnomad ASJ exome

AF:

0.000101

Gnomad EAS exome

AF:

0.0000553

Gnomad SAS exome

AF:

0.0000353

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000268

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000248

AC:

AN:

1451164

Hom.:

Cov.:

AF XY:

0.0000236

AC XY:

AN XY:

720988

show subpopulations

Gnomad4 AFR exome

AF:

0.0000606

Gnomad4 AMR exome

AF:

0.0000232

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.0000506

Gnomad4 SAS exome

AF:

0.0000481

Gnomad4 FIN exome

AF:

0.0000188

Gnomad4 NFE exome

AF:

0.0000181

Gnomad4 OTH exome

AF:

0.0000833

GnomAD4 genome

AF:

0.0000658

AC:

AN:

152062

Hom.:

Cov.:

AF XY:

0.0000404

AC XY:

AN XY:

74318

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.000131

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.000193

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000735

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000109

Hom.:

Bravo

AF:

0.0000151

ExAC

AF:

0.0000165

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Oct 04, 2024

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.649C>T (p.R217W) alteration is located in exon 9 (coding exon 9) of the DHX35 gene. This alteration results from a C to T substitution at nucleotide position 649, causing the arginine (R) at amino acid position 217 to be replaced by a tryptophan (W). 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

0.33

BayesDel_addAF

Benign

-0.25

BayesDel_noAF

Benign

-0.43

CADD

Uncertain

DANN

Uncertain

1.0

DEOGEN2

Benign

0.18

.;T;.

Eigen

Uncertain

0.43

Eigen_PC

Uncertain

0.41

FATHMM_MKL

Uncertain

0.91

LIST_S2

Uncertain

0.95

D;D;D

M_CAP

Benign

0.025

MetaRNN

Benign

0.23

T;T;T

MetaSVM

Benign

-1.2

MutationAssessor

Uncertain

2.1

.;M;.

PrimateAI

Benign

0.30

PROVEAN

Uncertain

-4.2

D;D;D

REVEL

Benign

0.13

Sift

Benign

0.18

T;T;T

Sift4G

Benign

0.18

T;T;T

Polyphen

0.97

.;D;.

Vest4

0.37

MVP

0.59

MPC

0.16

ClinPred

0.74

GERP RS

3.6

Varity_R

0.11

gMVP

0.61

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.39

Details are displayed if max score is > 0.2

DS_AL_spliceai

0.39

Position offset: -6

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

Publications

LitVar

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over