Genetic Variant DOCK8:c.5962-9dupT (chr9-451977-A-AT) – ACMG Classification: Likely_benign (-4 pts)

Variant summary

Our verdict is Likely benign. The variant received -4 ACMG points: 0P and 4B. BS1

The NM_203447.4(DOCK8):c.5962-9dupT variant causes a splice region, intron change involving the alteration of a non-conserved nucleotide. 1/1 splice prediction tools predict no significant impact on normal splicing. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

Frequency

Genomes: 𝑓 0.0012 ( 0 hom., cov: 10)

Exomes 𝑓: 0.00016 ( 0 hom. )

Consequence

DOCK8
NM_203447.4 splice_region, intron

Scores

Not classified

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 0.406

Publications

1 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 -4 ACMG points.

BS1

Variant frequency is greater than expected in population nfe. GnomAd4 allele frequency = 0.00117 (97/83052) while in subpopulation NFE AF = 0.00171 (78/45694). AF 95% confidence interval is 0.0014. There are 0 homozygotes in GnomAd4. There are 40 alleles in the male GnomAd4 subpopulation. Median coverage is 10. This position passed quality control check.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
DOCK8	NM_203447.4 link	c.5962-9dupT		splice_region_variant, intron_variant	Intron 45 of 47	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.5962-34_5962-33insT		intron_variant	Intron 45 of 47	1	NM_203447.4	ENSP00000394888.3		Q8NF50-1

Frequencies

GnomAD3 genomes

AF:

0.00117

AC:

AN:

83068

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000572

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000680

Gnomad ASJ

AF:

0.000395

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000378

Gnomad FIN

AF:

0.000477

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00171

Gnomad OTH

AF:

0.000996

GnomAD4 exome

AF:

0.000158

AC:

AN:

101444

Hom.:

Cov.:

AF XY:

0.000213

AC XY:

AN XY:

61018

show subpopulations

⚠️ The allele balance in gnomAD version 4 Exomes is significantly skewed from the expected value of 0.5.

African (AFR)

AF:

0.00

AC:

AN:

1488

American (AMR)

AF:

0.000239

AC:

AN:

4190

Ashkenazi Jewish (ASJ)

AF:

0.000370

AC:

AN:

2706

East Asian (EAS)

AF:

0.00

AC:

AN:

5036

South Asian (SAS)

AF:

0.00

AC:

AN:

8496

European-Finnish (FIN)

AF:

0.00

AC:

AN:

4070

Middle Eastern (MID)

AF:

0.00

AC:

AN:

356

European-Non Finnish (NFE)

AF:

0.000185

AC:

AN:

70130

Other (OTH)

AF:

0.000201

AC:

AN:

4972

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0.000000), which strongly suggests a high chance of mosaicism in these individuals.

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.269

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

AF:

0.00117

AC:

AN:

83052

Hom.:

Cov.:

AF XY:

0.00106

AC XY:

AN XY:

37618

show subpopulations

African (AFR)

AF:

0.000572

AC:

AN:

17492

American (AMR)

AF:

0.000680

AC:

AN:

7358

Ashkenazi Jewish (ASJ)

AF:

0.000395

AC:

AN:

2534

East Asian (EAS)

AF:

0.00

AC:

AN:

3506

South Asian (SAS)

AF:

0.000381

AC:

AN:

2624

European-Finnish (FIN)

AF:

0.000477

AC:

AN:

2098

Middle Eastern (MID)

AF:

0.00

AC:

AN:

126

European-Non Finnish (NFE)

AF:

0.00171

AC:

AN:

45694

Other (OTH)

AF:

0.000988

AC:

AN:

1012

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.417

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Alfa

AF:

0.00

Hom.:

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

PhyloP100

0.41

La Branchor

0.26

BranchPoint Hunter

4.0

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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9-451977-ATTTTTTTTTTTTTTTTT-ATTTTTTTTTTTTTTTTTT

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over