4-3463346-G-C

Variant names:

• chr4-3463346-G-C
• rs146168804
• NM_173660.5:c.-30G>C

Variant summary

Our verdict is Likely benign. The variant received -2 ACMG points: 2P and 4B. PM2 BP4_Strong

The NM_173660.5(DOK7):​c.-30G>C variant causes a 5 prime UTR change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000659 in 151,828 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency:
  • Genomes: 𝑓 0.0000066 (0 hom., cov: 32)
  • Exomes 𝑓: 0.0 (0 hom.)
  • Failed GnomAD Quality Control
• Consequence: DOK7 NM_173660.5 5_prime_UTR
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 1.61
• Publications: 2 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 -2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.78).

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.-30G>C		5_prime_UTR	Exon 1 of 7	NP_775931.3
	DOK7	NM_001301071.2		c.-30G>C		5_prime_UTR	Exon 1 of 10	NP_001288000.1	Q18PE1-3
	DOK7	NM_001363811.2		c.-30G>C		5_prime_UTR	Exon 1 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.-30G>C		5_prime_UTR	Exon 1 of 7	ENSP00000344432.5	Q18PE1-1
	DOK7	ENST00000643608.1		c.-30G>C		5_prime_UTR	Exon 1 of 8	ENSP00000495701.1	A0A2R8Y701
	DOK7	ENST00000507039.5	TSL:2	c.-30G>C		5_prime_UTR	Exon 1 of 7	ENSP00000423614.1	Q18PE1-4

Frequencies

GnomAD3 genomes AF: 0.00000659 AC: 1 AN: 151828 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.0000242

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00

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: 0.00

Gnomad OTH AF: 0.00

GnomAD4 exome Data not reliable, filtered out with message: AC0 AF: 0.00 AC: 0 AN: 1295524 Hom.: 0 Cov.: 32 AF XY: 0.00 AC XY: 0 AN XY: 637980

African (AFR) AF: 0.00 AC: 0 AN: 26330

American (AMR) AF: 0.00 AC: 0 AN: 18302

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 19904

East Asian (EAS) AF: 0.00 AC: 0 AN: 31666

South Asian (SAS) AF: 0.00 AC: 0 AN: 63344

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 34310

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 3708

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1044428

Other (OTH) AF: 0.00 AC: 0 AN: 53532

GnomAD4 genome AF: 0.00000659 AC: 1 AN: 151828 Hom.: 0 Cov.: 32 AF XY: 0.00 AC XY: 0 AN XY: 74136

African (AFR) AF: 0.0000242 AC: 1 AN: 41382

American (AMR) AF: 0.00 AC: 0 AN: 15268

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3468

East Asian (EAS) AF: 0.00 AC: 0 AN: 5134

South Asian (SAS) AF: 0.00 AC: 0 AN: 4828

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10552

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 314

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 67888

Other (OTH) AF: 0.00 AC: 0 AN: 2086

Alfa AF: 0.00 Hom.: 34

Bravo AF: 0.00000756

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.78
CADD	Benign	16
DANN	Benign	0.79
PhyloP100		1.6
PromoterAI		-0.049	Neutral

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

dbSNP: rs146168804;

hg19: chr4-3465073;