X-21737603-A-G
Variant summary
Our verdict is Uncertain significance. Variant got 1 ACMG points: 2P and 1B. PM1BP4
The NM_014332.3(SMPX):c.227T>C(p.Ile76Thr) variant causes a missense change. The variant allele was found at a frequency of 0.00000458 in 1,091,856 control chromosomes in the GnomAD database, with no homozygous occurrence. There are 2 hemizygotes in GnomAD. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).
Frequency
Genomes: not found (cov: 23)
Exomes 𝑓: 0.0000046 ( 0 hom. 2 hem. )
Consequence
SMPX
NM_014332.3 missense
NM_014332.3 missense
Scores
6
5
Clinical Significance
Conservation
PhyloP100: 5.40
Genes affected
SMPX (HGNC:11122): (small muscle protein X-linked) This gene encodes a small protein that has no known functional domains. Mutations in this gene are a cause of X-linked deafness-4, and the encoded protein may play a role in the maintenance of inner ear cells subjected to mechanical stress. Alternatively spliced transcript variants have been observed for this gene. [provided by RefSeq, Dec 2011]
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ACMG classification
Classification made for transcript
Verdict is Uncertain_significance. Variant got 1 ACMG points.
PM1
?
In a chain Small muscular protein (size 87) in uniprot entity SMPX_HUMAN there are 4 pathogenic changes around while only 1 benign (80%) in NM_014332.3
BP4
?
Computational evidence support a benign effect (MetaRNN=0.2882865).
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | UniProt |
---|---|---|---|---|---|---|---|
SMPX | NM_014332.3 | c.227T>C | p.Ile76Thr | missense_variant | 4/5 | ENST00000379494.4 | |
SMPX | XM_047441939.1 | c.227T>C | p.Ile76Thr | missense_variant | 4/7 | ||
SMPX | XM_047441940.1 | c.227T>C | p.Ile76Thr | missense_variant | 4/5 | ||
SMPX | NR_045617.2 | n.414T>C | non_coding_transcript_exon_variant | 4/6 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|
SMPX | ENST00000379494.4 | c.227T>C | p.Ile76Thr | missense_variant | 4/5 | 1 | NM_014332.3 | P1 | |
SMPX | ENST00000646008.1 | c.227T>C | p.Ile76Thr | missense_variant | 4/5 | P1 | |||
SMPX | ENST00000494525.1 | c.227T>C | p.Ile76Thr | missense_variant, NMD_transcript_variant | 4/6 | 5 |
Frequencies
GnomAD3 genomes ? Cov.: 23
GnomAD3 genomes
?
Cov.:
23
GnomAD3 exomes AF: 0.0000109 AC: 2AN: 183285Hom.: 0 AF XY: 0.00 AC XY: 0AN XY: 67783
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GnomAD4 exome AF: 0.00000458 AC: 5AN: 1091856Hom.: 0 Cov.: 28 AF XY: 0.00000560 AC XY: 2AN XY: 357366
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GnomAD4 genome ? Cov.: 23
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23
Bravo
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ClinVar
Significance: Uncertain significance
Submissions summary: Uncertain:1
Revision: criteria provided, single submitter
LINK: link
Submissions by phenotype
not provided Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | Invitae | Dec 11, 2021 | This sequence change replaces isoleucine, which is neutral and non-polar, with threonine, which is neutral and polar, at codon 76 of the SMPX protein (p.Ile76Thr). This variant is present in population databases (no rsID available, gnomAD 0.003%). 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. Algorithms developed to predict the effect of missense changes on protein structure and function are either unavailable or do not agree on the potential impact of this missense change (SIFT: "Deleterious"; PolyPhen-2: "Benign"; Align-GVGD: "Class C25"). This variant has not been reported in the literature in individuals affected with SMPX-related conditions. - |
Computational scores
Source:
Name
Calibrated prediction
Score
Prediction
AlphaMissense
Uncertain
BayesDel_addAF
Uncertain
T
BayesDel_noAF
Benign
Cadd
Benign
Dann
Uncertain
DEOGEN2
Uncertain
T;T;T
FATHMM_MKL
Uncertain
D
M_CAP
Benign
D
MetaRNN
Benign
T;T;T
MetaSVM
Benign
T
MutationTaster
Benign
D
PrimateAI
Uncertain
T
Polyphen
B;B;B
Vest4
0.57
MutPred
Loss of stability (P = 0.0112);Loss of stability (P = 0.0112);Loss of stability (P = 0.0112);
MVP
0.46
MPC
0.11
ClinPred
D
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