rs2699425

Variant names:

• chr4-3476324-T-A
• rs2699425
• NM_173660.5:c.332-18T>A

Your query was ambiguous. Multiple possible variants found:

• chr4-3476324-T-A
• chr4-3476324-T-C

Variant summary

Our verdict is Uncertain significance. The variant received 1 ACMG points: 1P and 0B. PP3

The NM_173660.5(DOK7):​c.332-18T>A variant causes a intron change involving the alteration of a non-conserved nucleotide. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 17)
  • Exomes 𝑓: 0.0 (0 hom.)
  • Failed GnomAD Quality Control
• Consequence: DOK7 NM_173660.5 intron
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: -2.50
• Publications: 0 publications found

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 Gene-Disease associations (from GenCC):

• congenital myasthenic syndrome 10

  Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: Ambry Genetics, Genomics England PanelApp, Labcorp Genetics (formerly Invitae), PanelApp Australia
• fetal akinesia deformation sequence 3

  Inheritance: AR Classification: STRONG, LIMITED Submitted by: Ambry Genetics, Labcorp Genetics (formerly Invitae)
• fetal akinesia deformation sequence 1

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
• postsynaptic congenital myasthenic syndrome

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

LOC105374355 (HGNC:):

ACMG classification

Our verdict: Uncertain_significance. The variant received 1 ACMG points.

• PP3: Splicing predictors support a deleterious effect. Scorers claiming Pathogenic: max_spliceai. No scorers claiming Uncertain. No scorers claiming Benign.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
DOK7	NM_173660.5	c.332-18T>A		intron_variant	Intron 3 of 6	ENST00000340083.6	NP_775931.3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
DOK7	ENST00000340083.6	c.332-18T>A		intron_variant	Intron 3 of 6	1	NM_173660.5	ENSP00000344432.5

Frequencies

GnomAD3 genomes Cov.: 17

GnomAD4 exome Data not reliable, filtered out with message: AC0 AF: 0.00 AC: 0 AN: 687952 Hom.: 0 Cov.: 35 AF XY: 0.00 AC XY: 0 AN XY: 344032

African (AFR) AF: 0.00 AC: 0 AN: 11702

American (AMR) AF: 0.00 AC: 0 AN: 24144

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 11780

East Asian (EAS) AF: 0.00 AC: 0 AN: 25268

South Asian (SAS) AF: 0.00 AC: 0 AN: 43300

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 28210

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 2558

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 513370

Other (OTH) AF: 0.00 AC: 0 AN: 27620

GnomAD4 genome Cov.: 17

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

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

Feb 04, 2022

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Algorithms developed to predict the effect of sequence changes on RNA splicing suggest that this variant may create or strengthen a splice site. 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. This variant has not been reported in the literature in individuals affected with DOK7-related conditions. This variant is not present in population databases (gnomAD no frequency). This sequence change falls in intron 3 of the DOK7 gene. It does not directly change the encoded amino acid sequence of the DOK7 protein. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.83
CADD	Benign	2.2
DANN	Benign	0.45
PhyloP100		-2.5

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.55		Details are displayed if max score is > 0.2
DS_AG_spliceai		0.47		Position offset: 2
DS_AL_spliceai		0.55		Position offset: 18

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Other links and lift over

dbSNP: rs2699425; hg19: chr4-3478051;