4-3493473-G-T

Variant summary

Our verdict is Uncertain significance. Variant got 3 ACMG points: 3P and 0B. PM2PP3

The NM_173660.5(DOK7):c.1487G>T(p.Gly496Val) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.000138 in 1,611,124 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic 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. G496A) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.000085 ( 0 hom., cov: 35)

Exomes 𝑓: 0.00014 ( 0 hom. )

Consequence

DOK7
NM_173660.5 missense

Scores

Clinical Significance

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

Conservation

PhyloP100: 8.47

Variant links:

Genes affected

DOK7 (HGNC:26594): (docking protein 7) The protein encoded by this gene is essential for neuromuscular synaptogenesis. The protein functions in aneural activation of muscle-specific receptor kinase, which is required for postsynaptic differentiation, and in the subsequent clustering of the acetylcholine receptor in myotubes. This protein can also induce autophosphorylation of muscle-specific receptor kinase. Mutations in this gene are a cause of familial limb-girdle myasthenia autosomal recessive, which is also known as congenital myasthenic syndrome type 1B. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Sep 2009]

DOK7 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 3 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP3

MetaRNN computational evidence supports a deleterious effect, 0.754

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
DOK7	NM_173660.5 linkuse as main transcript	c.1487G>T	p.Gly496Val	missense_variant	7/7	ENST00000340083.6

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
DOK7	ENST00000340083.6 linkuse as main transcript	c.1487G>T	p.Gly496Val	missense_variant	7/7	1	NM_173660.5	P1	Q18PE1-1
DOK7	ENST00000643608.1 linkuse as main transcript	c.1055G>T	p.Gly352Val	missense_variant	5/8
DOK7	ENST00000515886.5 linkuse as main transcript	c.557G>T	p.Gly186Val	missense_variant	4/4	2
DOK7	ENST00000507039.5 linkuse as main transcript	c.*708G>T		3_prime_UTR_variant	7/7	2			Q18PE1-4

Frequencies

GnomAD3 genomes

AF:

0.0000854

AC:

AN:

152244

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:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000147

Gnomad OTH

AF:

0.000478

GnomAD3 exomes

AF:

0.000126

AC:

AN:

237358

Hom.:

AF XY:

0.000161

AC XY:

AN XY:

130768

show subpopulations

Gnomad AFR exome

AF:

0.0000705

Gnomad AMR exome

AF:

0.000117

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.0000561

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000230

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.000143

AC:

209

AN:

1458762

Hom.:

Cov.:

AF XY:

0.000152

AC XY:

110

AN XY:

725558

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.000157

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.000174

Gnomad4 OTH exome

AF:

0.000149

GnomAD4 genome

AF:

0.0000853

AC:

AN:

152362

Hom.:

Cov.:

AF XY:

0.0000805

AC XY:

AN XY:

74506

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.000131

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.000147

Gnomad4 OTH

AF:

0.000473

Alfa

AF:

0.000145

Hom.:

Bravo

AF:

0.0000869

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000250

AC:

ExAC

AF:

0.000158

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:4

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Uncertain:2

Uncertain significance, criteria provided, single submitter	clinical testing	GeneDx	May 22, 2020	In silico analysis, which includes protein predictors and evolutionary conservation, supports a deleterious effect; Observed in a patient with congenital myasthenic syndrome who had a second DOK7 variant in the published literature; however no additional clinical or familial segregation information was provided (Cossins et al., 2012).; This variant is associated with the following publications: (PMID: 22661499) -
Uncertain significance, criteria provided, single submitter	clinical testing	Revvity Omics, Revvity	Aug 23, 2022	- -

Congenital myasthenic syndrome 10;C4760599:Fetal akinesia deformation sequence 3

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Fulgent Genetics, Fulgent Genetics

Jul 27, 2021

- -

Fetal akinesia deformation sequence 1;C1850792:Congenital myasthenic syndrome 10

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Invitae

Aug 21, 2022

This sequence change replaces glycine, which is neutral and non-polar, with valine, which is neutral and non-polar, at codon 496 of the DOK7 protein (p.Gly496Val). This variant is present in population databases (rs373205256, gnomAD 0.03%). This missense change has been observed in individual(s) with DOK7-related conditions (PMID: 22661499). ClinVar contains an entry for this variant (Variation ID: 571348). Algorithms developed to predict the effect of missense changes on protein structure and function are either unavailable or do not agree on the potential impact of this missense change (SIFT: "Deleterious"; PolyPhen-2: "Probably Damaging"; Align-GVGD: "Class C0"). 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. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.58

BayesDel_addAF

Uncertain

0.16

BayesDel_noAF

Pathogenic

0.32

Cadd

Pathogenic

Dann

Uncertain

1.0

DEOGEN2

Uncertain

0.59

D;.;.

Eigen

Pathogenic

0.71

Eigen_PC

Uncertain

0.63

FATHMM_MKL

Uncertain

0.96

LIST_S2

Uncertain

0.88

D;T;D

M_CAP

Pathogenic

0.50

MetaRNN

Pathogenic

0.75

D;D;D

MetaSVM

Uncertain

0.35

MutationAssessor

Uncertain

2.2

M;.;.

MutationTaster

Benign

1.0

D;D;D

PrimateAI

Uncertain

0.75

PROVEAN

Pathogenic

-4.8

D;.;.

REVEL

Pathogenic

0.74

Sift

Pathogenic

0.0

D;.;.

Sift4G

Uncertain

0.0060

D;.;.

Polyphen

1.0

D;.;.

Vest4

0.88

MVP

0.93

MPC

0.018

ClinPred

0.76

GERP RS

3.8

Varity_R

0.92

gMVP

0.39

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