rs750101214

chr9-110687128-C-Achr9-110687128-C-T

Variant summary

Our verdict is Uncertain significance. Variant got 4 ACMG points: 4P and 0B. PM1 PM2

The NM_005592.4(MUSK):c.218C>A(p.Thr73Asn) variant causes a missense change. The variant allele was found at a frequency of 0.00000342 in 1,461,094 control chromosomes in the GnomAD database, with no homozygous occurrence. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. T73A) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 31)
  • Exomes 𝑓: 0.0000034 (0 hom.)
• Consequence: MUSK NM_005592.4 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 4.36

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]

ACMG classification

Verdict is Uncertain_significance. Variant got 4 ACMG points.

• PM1: In a domain Ig-like 1 (size 88) in uniprot entity MUSK_HUMAN there are 8 pathogenic changes around while only 1 benign (89%) in NM_005592.4
• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
MUSK	NM_005592.4	c.218C>A	p.Thr73Asn	missense_variant	3/15	ENST00000374448.9

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
MUSK	ENST00000374448.9	c.218C>A	p.Thr73Asn	missense_variant	3/15	5	NM_005592.4	P4
MUSK	ENST00000416899.7	c.218C>A	p.Thr73Asn	missense_variant	3/14	5		A1
MUSK	ENST00000189978.10	c.218C>A	p.Thr73Asn	missense_variant	3/14	5

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD3 exomes AF: 0.00000402 AC: 1 AN: 248498 Hom.: 0 AF XY: 0.00000742 AC XY: 1 AN XY: 134774

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.0000327

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000342 AC: 5 AN: 1461094 Hom.: 0 Cov.: 31 AF XY: 0.00000550 AC XY: 4 AN XY: 726840

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.0000116

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00000360

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 31

ExAC AF: 0.00000827 AC: 1

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.21
BayesDel_addAF	Benign	-0.22	T
BayesDel_noAF	Benign	-0.45
Cadd	Pathogenic	26
Dann	Uncertain	0.99
DEOGEN2	Benign	0.12	T;.;.;.
Eigen	Uncertain	0.44
Eigen_PC	Uncertain	0.53
FATHMM_MKL	Uncertain	0.96	D
LIST_S2	Uncertain	0.88	D;D;D;D
M_CAP	Benign	0.017	T
MetaRNN	Uncertain	0.50	D;D;D;D
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	0.085	N;.;N;.
MutationTaster	Benign	1.0	D;D;D;D
PrimateAI	Uncertain	0.73	T
PROVEAN	Benign	-1.4	N;N;N;.
REVEL	Benign	0.18
Sift	Uncertain	0.0040	D;D;D;.
Sift4G	Benign	0.094	T;T;T;T
Polyphen		0.89	P;.;.;.
Vest4		0.35
MutPred		0.43		Loss of MoRF binding (P = 0.1428);Loss of MoRF binding (P = 0.1428);Loss of MoRF binding (P = 0.1428);Loss of MoRF binding (P = 0.1428);
MVP		0.50
MPC		0.71
ClinPred		0.76	D
GERP RS		5.9
Varity_R		0.44
gMVP		0.57

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

Other links and lift over

dbSNP: rs750101214; hg19: chr9-113449408;