NM_203447.4:c.4019A>G

Variant names:

Variant summary

Our verdict is Benign. Variant got -12 ACMG points: 1P and 13B. PP3BP4_StrongBP6BS1BS2

The NM_203447.4(DOCK8):c.4019A>G(p.Tyr1340Cys) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00357 in 1,614,156 control chromosomes in the GnomAD database, including 21 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

Frequency

Genomes: 𝑓 0.0027 ( 2 hom., cov: 33)

Exomes 𝑓: 0.0037 ( 19 hom. )

Consequence

DOCK8
NM_203447.4 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:4B:6

Conservation

PhyloP100: 9.22

Variant links:

Genes affected

DOCK8 (HGNC:19191): (dedicator of cytokinesis 8) This gene encodes a member of the DOCK180 family of guanine nucleotide exchange factors. Guanine nucleotide exchange factors interact with Rho GTPases and are components of intracellular signaling networks. Mutations in this gene result in the autosomal recessive form of the hyper-IgE syndrome. Alternatively spliced transcript variants encoding different isoforms have been described.[provided by RefSeq, Jun 2010]

DOCK8 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -12 ACMG points.

PP3

Multiple lines of computational evidence support a deleterious effect 8: AlphaMissense, Cadd, Eigen, FATHMM_MKL, phyloP100way_vertebrate, PrimateAI, PROVEAN, REVEL [when BayesDel_addAF, max_spliceai, M_CAP, MetaRNN, MutationTaster was below the threshold]

BP4

Computational evidence support a benign effect (MetaRNN=0.026553571).

BP6

Variant 9-420579-A-G is Benign according to our data. Variant chr9-420579-A-G is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 372357.We mark this variant Likely_benign, oryginal submissions are: {Likely_benign=3, Benign=2, Uncertain_significance=4}.

BS1

Variant frequency is greater than expected in population nfe. gnomad4 allele frequency = 0.00274 (417/152298) while in subpopulation NFE AF= 0.00365 (248/68030). AF 95% confidence interval is 0.00327. There are 2 homozygotes in gnomad4. There are 216 alleles in male gnomad4 subpopulation. Median coverage is 33. This position pass quality control queck.

BS2

High Homozygotes in GnomAd4 at 2 AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
DOCK8	NM_203447.4 link	c.4019A>G	p.Tyr1340Cys	missense_variant	Exon 31 of 48	ENST00000432829.7	NP_982272.2	Q8NF50-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
DOCK8	ENST00000432829.7 link	c.4019A>G	p.Tyr1340Cys	missense_variant	Exon 31 of 48	1	NM_203447.4	ENSP00000394888.3		Q8NF50-1

Frequencies

GnomAD3 genomes

AF:

0.00274

AC:

417

AN:

152180

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000821

Gnomad AMI

AF:

0.00219

Gnomad AMR

AF:

0.00249

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00186

Gnomad FIN

AF:

0.00744

Gnomad MID

AF:

0.00316

Gnomad NFE

AF:

0.00365

Gnomad OTH

AF:

0.00287

GnomAD3 exomes

AF:

0.00271

AC:

681

AN:

251468

Hom.:

AF XY:

0.00283

AC XY:

385

AN XY:

135904

show subpopulations

Gnomad AFR exome

AF:

0.000308

Gnomad AMR exome

AF:

0.00173

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00255

Gnomad FIN exome

AF:

0.00684

Gnomad NFE exome

AF:

0.00327

Gnomad OTH exome

AF:

0.00293

GnomAD4 exome

AF:

0.00366

AC:

5351

AN:

1461858

Hom.:

Cov.:

AF XY:

0.00356

AC XY:

2592

AN XY:

727234

show subpopulations

Gnomad4 AFR exome

AF:

0.000329

Gnomad4 AMR exome

AF:

0.00197

Gnomad4 ASJ exome

AF:

0.0000383

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00220

Gnomad4 FIN exome

AF:

0.00594

Gnomad4 NFE exome

AF:

0.00409

Gnomad4 OTH exome

AF:

0.00323

GnomAD4 genome

AF:

0.00274

AC:

417

AN:

152298

Hom.:

Cov.:

AF XY:

0.00290

AC XY:

216

AN XY:

74472

show subpopulations

Gnomad4 AFR

AF:

0.000818

Gnomad4 AMR

AF:

0.00248

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00187

Gnomad4 FIN

AF:

0.00744

Gnomad4 NFE

AF:

0.00365

Gnomad4 OTH

AF:

0.00284

Alfa

AF:

0.00305

Hom.:

Bravo

AF:

0.00235

TwinsUK

AF:

0.00539

AC:

ALSPAC

AF:

0.00649

AC:

ESP6500AA

AF:

0.000681

AC:

ESP6500EA

AF:

0.00360

AC:

ExAC

AF:

0.00253

AC:

307

Asia WGS

AF:

0.000577

AC:

AN:

3478

EpiCase

AF:

0.00311

EpiControl

AF:

0.00373

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:4Benign:6

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

not specified

Uncertain:2Benign:2

May 20, 2016

Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

p.Tyr1340Cys in exon 31 of DOCK8: This variant is not expected to have clinical significance because it has been identified in 0.7% (48/6614) of Finnish chromos omes by the Exome Aggregation Consortium (ExAC, http://exac.broadinstitute.org; dbSNP rs116920018). -

Dec 15, 2023

Women's Health and Genetics/Laboratory Corporation of America, LabCorp

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Variant summary: DOCK8 c.4019A>G (p.Tyr1340Cys) results in a non-conservative amino acid change in the encoded protein sequence. Four of five in-silico tools predict a damaging effect of the variant on protein function. The variant allele was found at a frequency of 0.0036 in 1614156 control chromosomes in the gnomAD database, including 21 homozygotes, strongly suggesting the variant is a benign polymorphism. c.4019A>G has been reported in the literature in the heterozygous state in an individual with some clinical features of Combined Immunodeficiency Due To DOCK8 Deficiency, without strong evidence for causality (Similuk_2022). This report does not provide unequivocal conclusions about association of the variant with Combined Immunodeficiency Due To DOCK8 Deficiency. To our knowledge, no experimental evidence demonstrating an impact on protein function has been reported. The following publication has been ascertained in the context of this evaluation (PMID: 35753512). Eight submitters have cited clinical-significance assessments for this variant to ClinVar after 2014. Four submitters classified the variant as benign/likely benign and four classified it as uncertain significance. Based on the evidence outlined above, the variant was classified as likely benign. -

Aug 30, 2021

Genetic Services Laboratory, University of Chicago

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

DNA sequence analysis of the DOCK8 gene demonstrated a sequence change, c.4019A>G, in exon 31 that results in an amino acid change, p.Tyr1340Cys. This sequence change has been described in the gnomAD database with a frequency of 0.65% in the non-Finnish European subpopulation and includes 2 homozygous individuals (dbSNP rs116920018). The p.Tyr1340Cys change affects a highly conserved amino acid residue located in a domain of the DOCK8 protein that is not known to be functional. The p.Tyr1340Cys substitution appears to be deleterious using several in-silico pathogenicity prediction tools (SIFT, PolyPhen2, Align GVGD, REVEL). This sequence change does not appear to have been previously described in individuals with DOCK8-related disorders. Due to insufficient evidences and the lack of functional studies, the clinical significance of the p.Tyr1340Cys change remains unknown at this time. -

Dec 08, 2016

GeneDx

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

A variant of uncertain significance has been identified in the DOCK8 gene. The Y1272C variant has not been published as a germline pathogenic variant, nor has it been reported as a benign variant to our knowledge. The NHLBI Exome Sequencing Project and the 1000 Genomes Project Consortium report Y1272C was observed in 31/8600 (0.36%) alleles and 3/694 (0.43%) from individuals of European and mixed American ancestry, respectively, indicating it may be a rare variant in these populations. Additionally, the variant has been observed in the homozygous state in two unaffected individuals at GeneDx. However, the Y1272C variant is a non-conservative amino acid substitution, which is likely to impact secondary protein structure as these residues differ in polarity, charge, size and/or other properties. This substitution occurs at a position that is conserved across species, and in silico analysis predicts this variant is probably damaging to the protein structure/function. Therefore, based on the currently available information, it is unclear whether this variant is a pathogenic variant or a rare benign variant. -

Combined immunodeficiency due to DOCK8 deficiency

Uncertain:1Benign:1

Apr 27, 2017

Illumina Laboratory Services, Illumina

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This variant was observed as part of a predisposition screen in an ostensibly healthy population. A literature search was performed for the gene, cDNA change, and amino acid change (where applicable). Publications were found based on this search. The evidence from the literature, in combination with allele frequency data from public databases where available, was sufficient to rule this variant out of causing disease. Therefore, this variant is classified as benign. -

Mar 30, 2021

Center for Genomics, Ann and Robert H. Lurie Children's Hospital of Chicago

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

DOCK8 NM_203447.3 exon 31 p.Tyr1340Cys (c.4019A>G):This variant has not been reported in the literature but is present in 0.6% (175/25788) of European (Finnish) alleles, including 1 homozygote in the Genome Aggregation Database (http://gnomad.broadinstitute.org/rs116920018). This variant is present in ClinVar (Variation ID:372357). Evolutionary conservation and computational predictive tools suggest that this variant may impact the protein. Splice prediction tools suggest that this variant may affect splicing. However, further studies are needed to understand its impact. In summary, data on this variant is insufficient for disease classification. Therefore, the clinical significance of this variant is uncertain. -

not provided

Uncertain:1Benign:1

Sep 30, 2022

Mayo Clinic Laboratories, Mayo Clinic

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Oct 01, 2023

CeGaT Center for Human Genetics Tuebingen

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

DOCK8: BS2 -

DOCK8-related disorder

Benign:1

May 22, 2020

PreventionGenetics, part of Exact Sciences

Significance: Likely benign

Review Status: no assertion criteria provided

Collection Method: clinical testing

This variant is classified as likely benign based on ACMG/AMP sequence variant interpretation guidelines (Richards et al. 2015 PMID: 25741868, with internal and published modifications). -

Benign:1

Jan 30, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.72

BayesDel_addAF

Benign

-0.073

BayesDel_noAF

Uncertain

0.13

CADD

Pathogenic

DANN

Uncertain

1.0

DEOGEN2

Pathogenic

0.82

D;.;.;T

Eigen

Pathogenic

0.98

Eigen_PC

Pathogenic

0.93

FATHMM_MKL

Pathogenic

1.0

LIST_S2

Pathogenic

1.0

D;D;D;D

M_CAP

Benign

0.044

MetaRNN

Benign

0.027

T;T;T;T

MetaSVM

Benign

-1.1

MutationAssessor

Uncertain

2.8

M;.;.;.

PrimateAI

Pathogenic

0.86

PROVEAN

Pathogenic

-8.4

.;.;D;D

REVEL

Pathogenic

0.65

Sift

Pathogenic

0.0

.;.;D;D

Sift4G

Pathogenic

0.0

D;D;D;D

Polyphen

1.0

D;.;.;D

Vest4

0.95

MVP

0.62

MPC

0.33

ClinPred

0.088

GERP RS

6.0

Varity_R

0.78

gMVP

0.82

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

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