4-3492867-C-T

Position:

chr4-3492867-C-T

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2BP4_Moderate

The NM_001256896.2(DOK7):c.-50C>T variant causes a 5 prime UTR premature start codon gain change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000367 in 1,607,894 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 (★★).

Frequency

Genomes: 𝑓 0.000085 ( 0 hom., cov: 34)

Exomes 𝑓: 0.000032 ( 0 hom. )

Consequence

DOK7
NM_001256896.2 5_prime_UTR_premature_start_codon_gain

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:2

Conservation

PhyloP100: 3.28

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 0 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.16199318).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
DOK7	NM_173660.5 link	c.881C>T	p.Thr294Met	missense_variant	7/7	ENST00000340083.6	NP_775931.3	Q18PE1-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
DOK7	ENST00000340083.6 link	c.881C>T	p.Thr294Met	missense_variant	7/7	1	NM_173660.5	ENSP00000344432.5		Q18PE1-1

Frequencies

GnomAD3 genomes

AF:

0.0000854

AC:

AN:

152168

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000145

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.000386

Gnomad SAS

AF:

0.000207

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000588

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000636

AC:

AN:

235984

Hom.:

AF XY:

0.0000933

AC XY:

AN XY:

128558

show subpopulations

Gnomad AFR exome

AF:

0.000135

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.000103

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.000170

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000664

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000316

AC:

AN:

1455726

Hom.:

Cov.:

AF XY:

0.0000345

AC XY:

AN XY:

723828

show subpopulations

Gnomad4 AFR exome

AF:

0.000240

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.0000385

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.000222

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000135

Gnomad4 OTH exome

AF:

0.0000499

GnomAD4 genome

AF:

0.0000854

AC:

AN:

152168

Hom.:

Cov.:

AF XY:

0.000108

AC XY:

AN XY:

74328

show subpopulations

Gnomad4 AFR

AF:

0.000145

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.000386

Gnomad4 SAS

AF:

0.000207

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000588

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000987

Hom.:

Bravo

AF:

0.0000831

ESP6500AA

AF:

0.000227

AC:

ESP6500EA

AF:

0.00

AC:

ExAC

AF:

0.0000911

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

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

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Jul 27, 2022

This sequence change replaces threonine, which is neutral and polar, with methionine, which is neutral and non-polar, at codon 294 of the DOK7 protein (p.Thr294Met). This variant is present in population databases (rs151079259, gnomAD 0.02%). This variant has not been reported in the literature in individuals affected with DOK7-related conditions. Algorithms developed to predict the effect of missense changes on protein structure and function output the following: SIFT: "Deleterious"; PolyPhen-2: "Benign"; Align-GVGD: "Class C0". The methionine amino acid residue is found in multiple mammalian species, which suggests that this missense change does not adversely affect protein function. 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. -

not provided

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Revvity Omics, Revvity

May 02, 2019

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.087

BayesDel_addAF

Benign

-0.30

BayesDel_noAF

Benign

-0.38

CADD

Benign

DANN

Uncertain

0.99

DEOGEN2

Benign

0.18

T;.

Eigen

Benign

-0.19

Eigen_PC

Benign

-0.31

FATHMM_MKL

Uncertain

0.83

LIST_S2

Benign

0.60

T;T

M_CAP

Uncertain

0.18

MetaRNN

Benign

0.16

T;T

MetaSVM

Benign

-0.85

MutationAssessor

Benign

1.9

M;.

PrimateAI

Uncertain

0.52

PROVEAN

Uncertain

-2.4

N;.

REVEL

Benign

0.16

Sift

Uncertain

0.021

D;.

Sift4G

Uncertain

0.0080

D;.

Polyphen

0.89

P;.

Vest4

0.13

MVP

0.77

MPC

0.0046

ClinPred

0.080

GERP RS

2.8

Varity_R

0.099

gMVP

0.17

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

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