4-3493015-C-A

Variant names:

• chr4-3493015-C-A
• NM_173660.5:c.1029C>A
• DOK7 p.Gly343Gly

Variant summary

Our verdict is Likely benign. The variant received -3 ACMG points: 2P and 5B. PM2 BP4_Strong BP7

The NM_173660.5(DOK7):​c.1029C>A​(p.Gly343Gly) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Synonymous variant affecting the same amino acid position (i.e. G343G) has been classified as Likely benign.

• Frequency:
  • Genomes: not found (cov: 34)
  • Exomes 𝑓: 0.0 (0 hom.)
  • Failed GnomAD Quality Control
• Consequence: DOK7 NM_173660.5 synonymous
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.194
• 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: Labcorp Genetics (formerly Invitae), Genomics England PanelApp, ClinGen, Ambry Genetics
• fetal akinesia deformation sequence 3

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

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

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

Our verdict: Likely_benign. The variant received -3 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.61).
• BP7: Synonymous conserved (PhyloP=-0.194 with no splicing effect.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_173660.5. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	DOK7	NM_173660.5	MANE Select	c.1029C>A	p.Gly343Gly	synonymous	Exon 7 of 7	NP_775931.3
	DOK7	NM_001301071.2		c.1029C>A	p.Gly343Gly	synonymous	Exon 7 of 10	NP_001288000.1	Q18PE1-3
	DOK7	NM_001363811.2		c.597C>A	p.Gly199Gly	synonymous	Exon 5 of 8	NP_001350740.1	A0A2R8Y701

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	DOK7	ENST00000340083.6	TSL:1 MANE Select	c.1029C>A	p.Gly343Gly	synonymous	Exon 7 of 7	ENSP00000344432.5	Q18PE1-1
	DOK7	ENST00000643608.1		c.597C>A	p.Gly199Gly	synonymous	Exon 5 of 8	ENSP00000495701.1	A0A2R8Y701
	DOK7	ENST00000515886.5	TSL:2	c.99C>A	p.Gly33Gly	synonymous	Exon 4 of 4	ENSP00000492194.1	A0A1W2PRA3

Frequencies

GnomAD3 genomes Cov.: 34

GnomAD4 exome Data not reliable, filtered out with message: AC0 AF: 0.00 AC: 0 AN: 1414594 Hom.: 0 Cov.: 111 AF XY: 0.00 AC XY: 0 AN XY: 700926

African (AFR) AF: 0.00 AC: 0 AN: 32808

American (AMR) AF: 0.00 AC: 0 AN: 38980

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 25440

East Asian (EAS) AF: 0.00 AC: 0 AN: 37764

South Asian (SAS) AF: 0.00 AC: 0 AN: 81880

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 40106

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5728

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1093050

Other (OTH) AF: 0.00 AC: 0 AN: 58838

GnomAD4 genome Cov.: 34

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.61
CADD	Benign	12
DANN	Benign	0.61
PhyloP100		-0.19

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

MaxEntScan Visualizer can be used to analyze the impact of this mutation on the neighboring sequence.

Other links and lift over

hg19: chr4-3494742;