rs765059037
Variant summary
Our verdict is Likely benign. Variant got -4 ACMG points: 0P and 4B. BS2
The NM_033118.4(MYLK2):c.1657C>T(p.Arg553Cys) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000305 in 1,608,884 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★★). Synonymous variant affecting the same amino acid position (i.e. R553R) has been classified as Likely benign.
Frequency
Genomes: 𝑓 0.000046 ( 0 hom., cov: 32)
Exomes 𝑓: 0.000029 ( 0 hom. )
Consequence
MYLK2
NM_033118.4 missense
NM_033118.4 missense
Scores
3
8
7
Clinical Significance
Conservation
PhyloP100: 2.91
Genes affected
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ACMG classification
Classification made for transcript
Verdict is Likely_benign. Variant got -4 ACMG points.
BS2
?
High AC in GnomAd at 7 AD,Digenic gene.
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | UniProt |
---|---|---|---|---|---|---|---|
MYLK2 | NM_033118.4 | c.1657C>T | p.Arg553Cys | missense_variant | 12/13 | ENST00000375985.5 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|
MYLK2 | ENST00000375985.5 | c.1657C>T | p.Arg553Cys | missense_variant | 12/13 | 1 | NM_033118.4 | P1 | |
MYLK2 | ENST00000375994.6 | c.1657C>T | p.Arg553Cys | missense_variant | 11/12 | 1 | P1 | ||
MYLK2 | ENST00000468730.1 | n.595C>T | non_coding_transcript_exon_variant | 5/6 | 1 |
Frequencies
GnomAD3 genomes ? AF: 0.0000460 AC: 7AN: 152128Hom.: 0 Cov.: 32
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GnomAD3 exomes AF: 0.0000334 AC: 8AN: 239816Hom.: 0 AF XY: 0.0000309 AC XY: 4AN XY: 129472
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GnomAD4 exome AF: 0.0000288 AC: 42AN: 1456638Hom.: 0 Cov.: 36 AF XY: 0.0000207 AC XY: 15AN XY: 724054
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GnomAD4 genome ? AF: 0.0000460 AC: 7AN: 152246Hom.: 0 Cov.: 32 AF XY: 0.0000403 AC XY: 3AN XY: 74430
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ClinVar
Significance: Uncertain significance
Submissions summary: Uncertain:3
Revision: criteria provided, multiple submitters, no conflicts
LINK: link
Submissions by phenotype
not specified Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | Ambry Genetics | Oct 05, 2022 | The c.1657C>T (p.R553C) alteration is located in exon 12 (coding exon 11) of the MYLK2 gene. This alteration results from a C to T substitution at nucleotide position 1657, causing the arginine (R) at amino acid position 553 to be replaced by a cysteine (C). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. - |
not provided Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | GeneDx | Aug 22, 2016 | p.Arg553Cys (CGC>TGC): c.1657 C>T in exon 12 of the MYLK2 gene (NM_033118.3). A variant of unknown significance has been identified in the MYLK2 gene. The R553C variant has not been published as a mutation, nor has it been reported as a benign polymorphism to our knowledge. The R553C variant was not observed in approximately 6,500 individuals of European and African American ancestry in the NHLBI Exome Sequencing Project, indicating it is not a common benign variant in these populations. The R553C variant is a non-conservative amino acid substitution, which is likely to impact secondary protein structure as these residues differ in polarity, charge, size and/or other properties. This substitution occurs at a position that is conserved across species. In silico analysis predicts this variant is probably damaging to the protein structure/function. However, no missense mutations in nearby residues have been reported in association with cardiomyopathy, indicating this region of the protein may be tolerant of change. Therefore, based on the currently available information, it is unclear whether this variant is a pathogenic mutation or a rare benign variant. The variant is found in CARDIOMYOPATHY panel(s). - |
Hypertrophic cardiomyopathy 1 Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | Invitae | Nov 08, 2022 | 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. Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is not expected to disrupt MYLK2 protein function. ClinVar contains an entry for this variant (Variation ID: 201863). This variant has not been reported in the literature in individuals affected with MYLK2-related conditions. This variant is present in population databases (rs765059037, gnomAD 0.01%). This sequence change replaces arginine, which is basic and polar, with cysteine, which is neutral and slightly polar, at codon 553 of the MYLK2 protein (p.Arg553Cys). - |
Computational scores
Source:
Name
Calibrated prediction
Score
Prediction
AlphaMissense
Benign
BayesDel_addAF
Benign
T
BayesDel_noAF
Benign
Cadd
Pathogenic
Dann
Pathogenic
DEOGEN2
Uncertain
D;D
Eigen
Uncertain
Eigen_PC
Uncertain
FATHMM_MKL
Uncertain
D
M_CAP
Benign
D
MetaRNN
Uncertain
T;T
MetaSVM
Benign
T
MutationAssessor
Benign
L;L
MutationTaster
Benign
D;D
PrimateAI
Uncertain
T
PROVEAN
Pathogenic
D;D
REVEL
Uncertain
Sift
Uncertain
D;D
Sift4G
Pathogenic
D;D
Polyphen
D;D
Vest4
MutPred
Gain of catalytic residue at L554 (P = 0.0152);Gain of catalytic residue at L554 (P = 0.0152);
MVP
MPC
ClinPred
T
GERP RS
Varity_R
gMVP
Splicing
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SpliceAI score (max)
Details are displayed if max score is > 0.2
Find out detailed SpliceAI scores and Pangolin per-transcript scores at