5-137870652-A-T

Variant summary

Our verdict is Pathogenic. Variant got 10 ACMG points: 10P and 0B. PVS1PM2

The NM_006790.3(MYOT):​c.1A>T​(p.Met1?) variant causes a initiator codon change. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: not found (cov: 32)

Consequence

MYOT
NM_006790.3 initiator_codon

Scores

6
3
6

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 4.82
Variant links:
Genes affected
MYOT (HGNC:12399): (myotilin) This gene encodes a cystoskeletal protein which plays a significant role in the stability of thin filaments during muscle contraction. This protein binds F-actin, crosslinks actin filaments, and prevents latrunculin A-induced filament disassembly. Mutations in this gene have been associated with limb-girdle muscular dystrophy and myofibrillar myopathies. Several alternatively spliced transcript variants of this gene have been described, but the full-length nature of some of these variants has not been determined.[provided by RefSeq, Oct 2008]
PKD2L2-DT (HGNC:55557): (PKD2L2 divergent transcript)

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Pathogenic. Variant got 10 ACMG points.

PVS1
Start lost variant, next in-frame start position is after 20 pathogenic variants. Next in-frame start position is after 189 CDS bases. Genomic position: 137870840. Lost 0.126 part of the original CDS.
PM2
Very rare variant in population databases, with high coverage;

Transcripts

RefSeq

Gene Transcript HGVSc HGVSp Effect Exon rank MANE Protein UniProt
MYOTNM_006790.3 linkc.1A>T p.Met1? initiator_codon_variant Exon 2 of 10 ENST00000239926.9 NP_006781.1 Q9UBF9A0A0C4DFM5

Ensembl

Gene Transcript HGVSc HGVSp Effect Exon rank TSL MANE Protein Appris UniProt
MYOTENST00000239926.9 linkc.1A>T p.Met1? initiator_codon_variant Exon 2 of 10 1 NM_006790.3 ENSP00000239926.4 A0A0C4DFM5

Frequencies

GnomAD3 genomes
Cov.:
32
GnomAD4 exome
Cov.:
31
GnomAD4 genome
Cov.:
32

ClinVar

Significance: Uncertain significance
Submissions summary: Uncertain:1
Revision: criteria provided, single submitter
LINK: link

Submissions by phenotype

Myofibrillar myopathy 3 Uncertain:1
Feb 01, 2018
Labcorp Genetics (formerly Invitae), Labcorp
Significance: Uncertain significance
Review Status: criteria provided, single submitter
Collection Method: clinical testing

This variant is not present in population databases (ExAC no frequency). 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. The current clinical and genetic evidence is not sufficient to establish whether loss-of-function variants in MYOT cause disease. This variant has not been reported in the literature in individuals with MYOT-related disease. This sequence change affects the initiator methionine of the MYOT mRNA. The next in-frame methionine is located at codon 64. -

Computational scores

Source: dbNSFP v4.3

Name
Calibrated prediction
Score
Prediction
BayesDel_addAF
Pathogenic
0.34
D
BayesDel_noAF
Pathogenic
0.25
CADD
Uncertain
24
DANN
Benign
0.96
Eigen
Benign
0.047
Eigen_PC
Benign
0.21
FATHMM_MKL
Uncertain
0.93
D
LIST_S2
Uncertain
0.90
D
M_CAP
Pathogenic
0.36
D
MetaRNN
Pathogenic
0.78
D
MetaSVM
Benign
-0.66
T
PROVEAN
Benign
-0.76
N
REVEL
Uncertain
0.39
Sift
Pathogenic
0.0
D
Sift4G
Pathogenic
0.0
D
Vest4
0.76
MutPred
0.59
Loss of phosphorylation at Y4 (P = 0.1638);
MVP
0.87
ClinPred
0.99
D
GERP RS
5.5
gMVP
0.45

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

Below is the list of publications found by LitVar. It may be empty.

Other links and lift over

dbSNP: rs1561657261; hg19: chr5-137206341; API