rs1554441994
Positions:
Variant summary
Our verdict is Uncertain significance. Variant got 5 ACMG points: 5P and 0B. PM1PM2PM4_Supporting
The NM_000474.4(TWIST1):c.398_400del(p.Lys133del) variant causes a inframe deletion change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Uncertain significance (★).
Frequency
Genomes: not found (cov: 32)
Consequence
TWIST1
NM_000474.4 inframe_deletion
NM_000474.4 inframe_deletion
Scores
Not classified
Clinical Significance
Conservation
PhyloP100: 7.88
Genes affected
TWIST1 (HGNC:12428): (twist family bHLH transcription factor 1) This gene encodes a basic helix-loop-helix (bHLH) transcription factor that plays an important role in embryonic development. The encoded protein forms both homodimers and heterodimers that bind to DNA E box sequences and regulate the transcription of genes involved in cranial suture closure during skull development. This protein may also regulate neural tube closure, limb development and brown fat metabolism. This gene is hypermethylated and overexpressed in multiple human cancers, and the encoded protein promotes tumor cell invasion and metastasis, as well as metastatic recurrence. Mutations in this gene cause Saethre-Chotzen syndrome in human patients, which is characterized by craniosynostosis, ptosis and hypertelorism. [provided by RefSeq, Jul 2020]
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ACMG classification
Classification made for transcript
Verdict is Uncertain_significance. Variant got 5 ACMG points.
PM1
In a hotspot region, there are 6 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 0 benign, 7 uncertain in NM_000474.4
PM2
Very rare variant in population databases, with high coverage;
PM4
Nonframeshift variant in NON repetitive region in NM_000474.4. Strenght limited to Supporting due to length of the change: 1aa.
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | UniProt |
---|---|---|---|---|---|---|---|
TWIST1 | NM_000474.4 | c.398_400del | p.Lys133del | inframe_deletion | 1/2 | ENST00000242261.6 | |
TWIST1 | NR_149001.2 | n.713_715del | non_coding_transcript_exon_variant | 1/3 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|
TWIST1 | ENST00000242261.6 | c.398_400del | p.Lys133del | inframe_deletion | 1/2 | 1 | NM_000474.4 | P1 | |
TWIST1 | ENST00000354571.5 | c.195_197del | p.Lys66del | inframe_deletion, NMD_transcript_variant | 1/3 | 2 | |||
TWIST1 | ENST00000443687.5 | c.1_3del | p.Ile3del | inframe_deletion, NMD_transcript_variant | 1/4 | 4 |
Frequencies
GnomAD3 genomes Cov.: 32
GnomAD3 genomes
Cov.:
32
We have no GnomAD4 exomes data on this position. Probably position not covered by the project.
GnomAD4 genome Cov.: 32
GnomAD4 genome
Cov.:
32
ClinVar
Significance: Uncertain significance
Submissions summary: Uncertain:1
Revision: criteria provided, single submitter
LINK: link
Submissions by phenotype
Inborn genetic diseases Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | Ambry Genetics | Apr 06, 2017 | - - |
Computational scores
Source:
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Calibrated prediction
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Prediction
Splicing
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Calibrated prediction
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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