rs139722192
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Variant summary
Our verdict is Benign. Variant got -21 ACMG points: 0P and 21B. BP4_StrongBP6_Very_StrongBP7BS1BS2
The NM_052989.3(IFT122):āc.1908T>Cā(p.Ile636=) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000559 in 1,614,188 control chromosomes in the GnomAD database, including 5 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (ā ā ).
Frequency
Genomes: š 0.0032 ( 2 hom., cov: 32)
Exomes š: 0.00029 ( 3 hom. )
Consequence
IFT122
NM_052989.3 synonymous
NM_052989.3 synonymous
Scores
2
Clinical Significance
Conservation
PhyloP100: -0.185
Genes affected
IFT122 (HGNC:13556): (intraflagellar transport 122) This gene encodes a member of the WD repeat protein family. WD repeats are minimally conserved regions of approximately 40 amino acids typically bracketed by gly-his and trp-asp (GH-WD), which may facilitate formation of heterotrimeric or multiprotein complexes. Members of this family are involved in a variety of cellular processes, including cell cycle progression, signal transduction, apoptosis, and gene regulation. This cytoplasmic protein contains seven WD repeats and an AF-2 domain which function by recruiting coregulatory molecules and in transcriptional activation. Mutations in this gene cause cranioectodermal dysplasia-1. A related pseudogene is located on chromosome 3. Alternative splicing results in multiple transcript variants encoding different isoforms. [provided by RefSeq, Jul 2013]
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ACMG classification
Classification made for transcript
Verdict is Benign. Variant got -21 ACMG points.
BP4
?
Computational evidence support a benign effect (BayesDel_noAF=-0.52).
BP6
?
Variant 3-129488313-T-C is Benign according to our data. Variant chr3-129488313-T-C is described in ClinVar as [Likely_benign]. Clinvar id is 211179.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.
BP7
?
Synonymous conserved (PhyloP=-0.185 with no splicing effect.
BS1
?
Variant frequency is greater than expected in population afr. gnomad4 allele frequency = 0.00315 (480/152346) while in subpopulation AFR AF= 0.0113 (471/41582). AF 95% confidence interval is 0.0105. There are 2 homozygotes in gnomad4. There are 225 alleles in male gnomad4 subpopulation. Median coverage is 32. This position pass quality control queck.
BS2
?
High Homozygotes in GnomAd4 at 2 AR gene
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | UniProt |
---|---|---|---|---|---|---|---|
IFT122 | NM_052989.3 | c.1908T>C | p.Ile636= | synonymous_variant | 16/30 | ENST00000348417.7 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|
IFT122 | ENST00000348417.7 | c.1908T>C | p.Ile636= | synonymous_variant | 16/30 | 1 | NM_052989.3 |
Frequencies
GnomAD3 genomes ? AF: 0.00315 AC: 479AN: 152228Hom.: 2 Cov.: 32
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GnomAD3 exomes AF: 0.000847 AC: 213AN: 251490Hom.: 2 AF XY: 0.000625 AC XY: 85AN XY: 135920
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GnomAD4 exome AF: 0.000289 AC: 423AN: 1461842Hom.: 3 Cov.: 31 AF XY: 0.000263 AC XY: 191AN XY: 727232
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GnomAD4 genome ? AF: 0.00315 AC: 480AN: 152346Hom.: 2 Cov.: 32 AF XY: 0.00302 AC XY: 225AN XY: 74498
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ClinVar
Significance: Benign/Likely benign
Submissions summary: Benign:6
Revision: criteria provided, multiple submitters, no conflicts
LINK: link
Submissions by phenotype
Cranioectodermal dysplasia 1 Benign:3
Benign, criteria provided, single submitter | clinical testing | Illumina Laboratory Services, Illumina | Jan 13, 2018 | This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score and internal cut-off values, a variant classified as benign is not then subjected to further curation. The score for this variant resulted in a classification of benign for this disease. - |
Benign, criteria provided, single submitter | clinical testing | Invitae | Jan 31, 2024 | - - |
Benign, criteria provided, single submitter | clinical testing | Fulgent Genetics, Fulgent Genetics | Jul 27, 2021 | - - |
IFT122-related disorder Benign:1
Likely benign, criteria provided, single submitter | clinical testing | PreventionGenetics, part of Exact Sciences | Mar 19, 2020 | This variant is classified as likely benign based on ACMG/AMP sequence variant interpretation guidelines (Richards et al. 2015 PMID: 25741868, with internal and published modifications). - |
not specified Benign:1
Likely benign, criteria provided, single submitter | clinical testing | Genetic Services Laboratory, University of Chicago | Apr 30, 2015 | - - |
not provided Benign:1
Likely benign, criteria provided, single submitter | clinical testing | GeneDx | Apr 18, 2021 | - - |
Computational scores
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BayesDel_noAF
Benign
CADD
Benign
DANN
Benign
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