dbSNP rs187497836: MUSK:c.486+7G>C (chr9-110695537-G-C) – ACMG Classification: Benign (-20 pts)

Variant summary

Our verdict is Benign. The variant received -20 ACMG points: 0P and 20B. BP4_StrongBP6_Very_StrongBS1BS2

The NM_005592.4(MUSK):c.486+7G>C variant causes a splice region, intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000236 in 1,542,740 control chromosomes in the GnomAD database, including 3 homozygotes. In-silico tool predicts a benign outcome for this variant. 3/3 splice prediction tools predict no significant impact on normal splicing. Variant has been reported in ClinVar as Likely benign (★★).

Frequency

Genomes: 𝑓 0.0012 ( 1 hom., cov: 32)

Exomes 𝑓: 0.00013 ( 2 hom. )

Consequence

MUSK
NM_005592.4 splice_region, intron

Scores

Splicing: ADA: 0.00007647

Clinical Significance

Benign/Likely benign criteria provided, multiple submitters, no conflicts B:6

Conservation

PhyloP100: 0.674

Publications

0 publications found

Variant links:

Genes affected

MUSK (HGNC:7525): (muscle associated receptor tyrosine kinase) This gene encodes a muscle-specific tyrosine kinase receptor. The encoded protein may play a role in clustering of the acetylcholine receptor in the postsynaptic neuromuscular junction. Mutations in this gene have been associated with congenital myasthenic syndrome. Alternatively spliced transcript variants have been described.[provided by RefSeq, Oct 2009]

MUSK Gene-Disease associations (from GenCC):

congenital myasthenic syndrome 9
Inheritance: AR Classification: STRONG Submitted by: Genomics England PanelApp, Labcorp Genetics (formerly Invitae)
fetal akinesia deformation sequence 1
Inheritance: AR Classification: STRONG, SUPPORTIVE Submitted by: Orphanet, Labcorp Genetics (formerly Invitae)
postsynaptic congenital myasthenic syndrome
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

MUSK links:

Genome browser will be placed here

new If you want to explore the variant's impact on the transcript NM_005592.4, check out the Mutation Effect Viewer. This is especially useful for frameshift variants or if you want to visualize the effect of exon loss / intron retention.

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -20 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.75).

BP6

Variant 9-110695537-G-C is Benign according to our data. Variant chr9-110695537-G-C is described in ClinVar as Benign/Likely_benign. ClinVar VariationId is 197257.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BS1

Variant frequency is greater than expected in population afr. GnomAd4 allele frequency = 0.00117 (178/152150) while in subpopulation AFR AF = 0.00414 (172/41512). AF 95% confidence interval is 0.00364. There are 1 homozygotes in GnomAd4. There are 75 alleles in the male GnomAd4 subpopulation. Median coverage is 32. This position passed quality control check.

BS2

High Homozygotes in GnomAdExome4 at 2 AR gene

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_005592.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Gene	Transcript	Tags	HGVSc	Effect	Exon Rank	Protein	UniProt
MUSK	NM_005592.4	MANE Select	c.486+7G>C	splice_region intron	N/A	NP_005583.1	O15146-1
MUSK	NM_001166280.2		c.486+7G>C	splice_region intron	N/A	NP_001159752.1	O15146-2
MUSK	NM_001166281.2		c.486+7G>C	splice_region intron	N/A	NP_001159753.1	O15146-3

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	Effect	Exon Rank	Protein	UniProt
MUSK	ENST00000374448.9	TSL:5 MANE Select	c.486+7G>C	splice_region intron	N/A	ENSP00000363571.4	O15146-1
MUSK	ENST00000416899.7	TSL:5	c.486+7G>C	splice_region intron	N/A	ENSP00000393608.3	A0A087WSY1
MUSK	ENST00000189978.10	TSL:5	c.486+7G>C	splice_region intron	N/A	ENSP00000189978.6	O15146-2

Frequencies

GnomAD3 genomes

AF:

0.00117

AC:

178

AN:

152032

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00416

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000328

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:

0.0000147

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.000256

AC:

AN:

160302

AF XY:

0.000166

show subpopulations

Gnomad AFR exome

AF:

0.00414

Gnomad AMR exome

AF:

0.0000877

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000150

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.000134

AC:

186

AN:

1390590

Hom.:

Cov.:

AF XY:

0.000119

AC XY:

AN XY:

686534

show subpopulations

African (AFR)

AF:

0.00470

AC:

147

AN:

31286

American (AMR)

AF:

0.0000873

AC:

AN:

34362

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

24930

East Asian (EAS)

AF:

0.00

AC:

AN:

36266

South Asian (SAS)

AF:

0.0000394

AC:

AN:

76130

European-Finnish (FIN)

AF:

0.00

AC:

AN:

50124

Middle Eastern (MID)

AF:

0.000528

AC:

AN:

5680

European-Non Finnish (NFE)

AF:

0.00000745

AC:

AN:

1073928

Other (OTH)

AF:

0.000380

AC:

AN:

57884

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.458

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.00117

AC:

178

AN:

152150

Hom.:

Cov.:

AF XY:

0.00101

AC XY:

AN XY:

74394

show subpopulations

African (AFR)

AF:

0.00414

AC:

172

AN:

41512

American (AMR)

AF:

0.000327

AC:

AN:

15284

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3472

East Asian (EAS)

AF:

0.00

AC:

AN:

5182

South Asian (SAS)

AF:

0.00

AC:

AN:

4800

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10592

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.0000147

AC:

AN:

67992

Other (OTH)

AF:

0.00

AC:

AN:

2110

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.501

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Genome Hom

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.000518

Hom.:

Bravo

AF:

0.00139

Asia WGS

AF:

0.000578

AC:

AN:

3472

ClinVar

ClinVar submissions

Significance:Benign/Likely benign

Revision:criteria provided, multiple submitters, no conflicts

View on ClinVar

Pathogenic

VUS

Benign

Condition

not specified (2)

Congenital myasthenic syndrome 9 (1)

Fetal akinesia deformation sequence 1;C4225368:Congenital myasthenic syndrome 9 (1)

MUSK-related disorder (1)

not provided (1)

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.75

CADD

Benign

7.0

(source)

DANN

Benign

0.51

PhyloP100

0.67

Splicing

Name

Calibrated prediction

Score

Prediction

dbscSNV1_ADA

Benign

0.000076

dbscSNV1_RF

Benign

0.026

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.

Publications

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over