9-439372-C-T

Variant names:

Variant summary

Our verdict is Likely benign. The variant received -2 ACMG points: 0P and 2B. BP4_Moderate

The NM_203447.4(DOCK8):c.5207C>T(p.Ala1736Val) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.0000545 in 1,613,408 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 (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. A1736G) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.00024 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000036 ( 0 hom. )

Consequence

DOCK8
NM_203447.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:4

Conservation

PhyloP100: 7.48

Publications

2 publications found

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 Gene-Disease associations (from GenCC):

combined immunodeficiency due to DOCK8 deficiency
Inheritance: AR Classification: DEFINITIVE, STRONG, MODERATE, SUPPORTIVE, LIMITED Submitted by: Orphanet, ClinGen, Labcorp Genetics (formerly Invitae), G2P, Ambry Genetics, Genomics England PanelApp
autosomal dominant non-syndromic intellectual disability
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
complex neurodevelopmental disorder
Inheritance: AD Classification: LIMITED Submitted by: Ambry Genetics

DOCK8 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -2 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.18930337).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_203447.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein
DOCK8	NM_203447.4	MANE Select	c.5207C>T	p.Ala1736Val	missense	Exon 40 of 48	NP_982272.2
DOCK8	NM_001193536.2		c.5003C>T	p.Ala1668Val	missense	Exon 39 of 47	NP_001180465.1
DOCK8	NM_001190458.2		c.4907C>T	p.Ala1636Val	missense	Exon 38 of 46	NP_001177387.1

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein
DOCK8	ENST00000432829.7	TSL:1 MANE Select	c.5207C>T	p.Ala1736Val	missense	Exon 40 of 48	ENSP00000394888.3
DOCK8	ENST00000469391.5	TSL:1	c.4907C>T	p.Ala1636Val	missense	Exon 38 of 46	ENSP00000419438.1
DOCK8	ENST00000382329.2	TSL:1	c.4907C>T	p.Ala1636Val	missense	Exon 39 of 46	ENSP00000371766.2

Frequencies

GnomAD3 genomes

AF:

0.000237

AC:

AN:

152110

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000869

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.0000877

AC:

AN:

250784

AF XY:

0.0000885

show subpopulations

Gnomad AFR exome

AF:

0.00111

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000353

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000356

AC:

AN:

1461298

Hom.:

Cov.:

AF XY:

0.0000344

AC XY:

AN XY:

726936

show subpopulations

African (AFR)

AF:

0.000866

AC:

AN:

33478

American (AMR)

AF:

0.0000224

AC:

AN:

44720

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26132

East Asian (EAS)

AF:

0.0000252

AC:

AN:

39700

South Asian (SAS)

AF:

0.0000348

AC:

AN:

86246

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53008

Middle Eastern (MID)

AF:

0.000175

AC:

AN:

5716

European-Non Finnish (NFE)

AF:

0.0000117

AC:

AN:

1111926

Other (OTH)

AF:

0.0000663

AC:

AN:

60372

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.472

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.000237

AC:

AN:

152110

Hom.:

Cov.:

AF XY:

0.000188

AC XY:

AN XY:

74292

show subpopulations

African (AFR)

AF:

0.000869

AC:

AN:

41420

American (AMR)

AF:

0.00

AC:

AN:

15272

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3470

East Asian (EAS)

AF:

0.00

AC:

AN:

5172

South Asian (SAS)

AF:

0.00

AC:

AN:

4822

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10608

Middle Eastern (MID)

AF:

0.00

AC:

AN:

316

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

68028

Other (OTH)

AF:

0.00

AC:

AN:

2090

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.493

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.0000736

Hom.:

Bravo

AF:

0.000329

ESP6500AA

AF:

0.00159

AC:

ESP6500EA

AF:

0.00

AC:

ExAC

AF:

0.000115

AC:

EpiCase

AF:

0.00

EpiControl

AF:

0.000178

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:4

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Combined immunodeficiency due to DOCK8 deficiency

Uncertain:3

Jan 12, 2018

Illumina Laboratory Services, Illumina

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score, this variant could not be ruled out of causing disease and therefore its association with disease required further investigation. A literature search was performed for the gene, cDNA change, and amino acid change (if applicable). No publications were found based on this search. This variant was therefore classified as a variant of unknown significance for this disease.

Aug 30, 2021

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This sequence change replaces alanine with valine at codon 1736 of the DOCK8 protein (p.Ala1736Val). The alanine residue is moderately conserved and there is a small physicochemical difference between alanine and valine. This variant is present in population databases (rs139990627, ExAC 0.1%). This variant has not been reported in the literature in individuals affected with DOCK8-related conditions. Algorithms developed to predict the effect of missense changes on protein structure and function (SIFT, PolyPhen-2, Align-GVGD) all suggest that this variant is likely to be tolerated. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance.

May 10, 2024

Fulgent Genetics, Fulgent Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Inborn genetic diseases

Uncertain:1

Oct 27, 2021

Ambry Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The c.5207C>T (p.A1736V) alteration is located in exon 40 (coding exon 40) of the DOCK8 gene. This alteration results from a C to T substitution at nucleotide position 5207, causing the alanine (A) at amino acid position 1736 to be replaced by a valine (V). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear.

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Uncertain

0.34

BayesDel_addAF

Benign

-0.11

BayesDel_noAF

Uncertain

0.020

CADD

Uncertain

(source)

DANN

Uncertain

1.0

DEOGEN2

Benign

0.26

Eigen

Benign

-0.057

Eigen_PC

Benign

0.019

FATHMM_MKL

Pathogenic

0.98

LIST_S2

Uncertain

0.95

M_CAP

Benign

0.0093

MetaRNN

Benign

0.19

MetaSVM

Benign

-1.1

MutationAssessor

Benign

1.7

PhyloP100

7.5

PrimateAI

Uncertain

0.65

PROVEAN

Uncertain

-3.2

REVEL

Benign

0.26

Sift

Uncertain

0.0020

Sift4G

Benign

0.10

Polyphen

0.17

Vest4

0.76

MVP

0.30

MPC

0.10

ClinPred

0.21

GERP RS

4.9

Varity_R

0.46

gMVP

0.67

Mutation Taster

=51/49

polymorphism

(source)

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

Publications

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over