Genetic Variant DOCK2:p.Ile1285Arg (chr5-170042110-T-G) – ACMG Classification: Uncertain_significance (4 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 4 ACMG points: 4P and 0B. PM2PP3_Moderate

The NM_004946.3(DOCK2):c.3854T>G(p.Ile1285Arg) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00000685 in 1,460,546 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. I1285T) has been classified as Uncertain significance.

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 0.0000068 ( 0 hom. )

Consequence

DOCK2
NM_004946.3 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 8.02

Publications

0 publications found

Variant links:

Genes affected

DOCK2 (HGNC:2988): (dedicator of cytokinesis 2) The protein encoded by this gene belongs to the CDM protein family. It is specifically expressed in hematopoietic cells and is predominantly expressed in peripheral blood leukocytes. The protein is involved in remodeling of the actin cytoskeleton required for lymphocyte migration in response to chemokine signaling. It activates members of the Rho family of GTPases, for example RAC1 and RAC2, by acting as a guanine nucleotide exchange factor (GEF) to exchange bound GDP for free GTP. Mutations in this gene result in immunodeficiency 40 (IMD40), a combined form of immunodeficiency that affects T cell number and function, also with variable defects in B cell and NK cell function. [provided by RefSeq, May 2018]

DOCK2 Gene-Disease associations (from GenCC):

DOCK2 deficiency
Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Orphanet, Labcorp Genetics (formerly Invitae), ClinGen, Ambry Genetics

DOCK2 links:

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ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 4 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP3

MetaRNN computational evidence supports a deleterious effect, 0.917

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
DOCK2	NM_004946.3 link	c.3854T>G	p.Ile1285Arg	missense_variant	Exon 38 of 52	ENST00000520908.7	NP_004937.1	Q92608-1Q5XG91
DOCK2	NR_156756.1 link	n.3957T>G		non_coding_transcript_exon_variant	Exon 39 of 53

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
DOCK2	ENST00000520908.7 link	c.3854T>G	p.Ile1285Arg	missense_variant	Exon 38 of 52	2	NM_004946.3	ENSP00000429283.3		Q92608-1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

0.00000685

AC:

AN:

1460546

Hom.:

Cov.:

AF XY:

0.00000688

AC XY:

AN XY:

726456

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33448

American (AMR)

AF:

0.00

AC:

AN:

44656

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26104

East Asian (EAS)

AF:

0.00

AC:

AN:

39628

South Asian (SAS)

AF:

0.00

AC:

AN:

86106

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53268

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5764

European-Non Finnish (NFE)

AF:

0.00000900

AC:

AN:

1111264

Other (OTH)

AF:

0.00

AC:

AN:

60308

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.460

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

Cov.:

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.65

BayesDel_addAF

Pathogenic

0.39

BayesDel_noAF

Pathogenic

0.32

CADD

Pathogenic

(source)

DANN

Uncertain

0.99

DEOGEN2

Benign

0.39

T;T

Eigen

Pathogenic

0.86

Eigen_PC

Pathogenic

0.79

FATHMM_MKL

Pathogenic

0.99

LIST_S2

Pathogenic

0.98

.;D

M_CAP

Uncertain

0.18

MetaRNN

Pathogenic

0.92

D;D

MetaSVM

Uncertain

0.35

MutationAssessor

Pathogenic

3.3

M;M

PhyloP100

8.0

PrimateAI

Uncertain

0.74

PROVEAN

Pathogenic

-5.6

D;.

REVEL

Pathogenic

0.80

Sift

Pathogenic

0.0

D;.

Sift4G

Pathogenic

0.0

D;.

Polyphen

1.0

D;D

Vest4

0.93

MutPred

0.72

Gain of MoRF binding (P = 0.0176);Gain of MoRF binding (P = 0.0176);

MVP

0.93

MPC

1.9

ClinPred

1.0

GERP RS

5.2

Varity_R

0.93

gMVP

0.87

Mutation Taster

=39/61

disease causing

(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

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over