chr12-88049231-C-CTG
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Variant summary
Our verdict is Uncertain significance. Variant got 4 ACMG points: 4P and 0B. PM2PM4
The NM_025114.4(CEP290):βc.7392_7393insCAβ(p.Glu2465GlnfsTer21) variant causes a frameshift change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000298 in 1,608,484 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (β β ).
Frequency
Genomes: π 0.00016 ( 0 hom., cov: 32)
Exomes π: 0.000016 ( 0 hom. )
Consequence
CEP290
NM_025114.4 frameshift
NM_025114.4 frameshift
Scores
Not classified
Clinical Significance
Conservation
PhyloP100: 0.0130
Genes affected
CEP290 (HGNC:29021): (centrosomal protein 290) This gene encodes a protein with 13 putative coiled-coil domains, a region with homology to SMC chromosome segregation ATPases, six KID motifs, three tropomyosin homology domains and an ATP/GTP binding site motif A. The protein is localized to the centrosome and cilia and has sites for N-glycosylation, tyrosine sulfation, phosphorylation, N-myristoylation, and amidation. Mutations in this gene have been associated with Joubert syndrome and nephronophthisis and the presence of antibodies against this protein is associated with several forms of cancer. [provided by RefSeq, Jul 2008]
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ACMG classification
Classification made for transcript
Verdict is Uncertain_significance. Variant got 4 ACMG points.
PM2
Very rare variant in population databases, with high coverage;
PM4
Frameshift in the end of transcript resulting in stoplost. Downstream stopcodon found after 2479 codons.
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | UniProt |
---|---|---|---|---|---|---|---|
CEP290 | NM_025114.4 | c.7392_7393insCA | p.Glu2465GlnfsTer21 | frameshift_variant | 54/54 | ENST00000552810.6 | |
RLIG1 | NM_001009894.3 | c.*810_*811insGT | 3_prime_UTR_variant | 7/7 | ENST00000356891.4 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|
CEP290 | ENST00000552810.6 | c.7392_7393insCA | p.Glu2465GlnfsTer21 | frameshift_variant | 54/54 | 1 | NM_025114.4 | P4 | |
RLIG1 | ENST00000356891.4 | c.*810_*811insGT | 3_prime_UTR_variant | 7/7 | 1 | NM_001009894.3 | P1 |
Frequencies
GnomAD3 genomes AF: 0.000158 AC: 24AN: 151908Hom.: 0 Cov.: 32
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GnomAD3 exomes AF: 0.0000449 AC: 11AN: 244852Hom.: 0 AF XY: 0.0000226 AC XY: 3AN XY: 132974
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GnomAD4 exome AF: 0.0000165 AC: 24AN: 1456460Hom.: 0 Cov.: 29 AF XY: 0.00000690 AC XY: 5AN XY: 724152
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GnomAD4 genome AF: 0.000158 AC: 24AN: 152024Hom.: 0 Cov.: 32 AF XY: 0.000215 AC XY: 16AN XY: 74304
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ClinVar
Significance: Uncertain significance
Submissions summary: Uncertain:4
Revision: criteria provided, multiple submitters, no conflicts
LINK: link
Submissions by phenotype
CEP290-related disorder Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | PreventionGenetics, part of Exact Sciences | Dec 20, 2023 | The CEP290 c.7392_7393insCA variant is predicted to result in a frameshift and premature protein termination (p.Glu2465Glnfs*21). This variant is located in the last exon of coding and is expected to disrupt the final 16 amino acids. To our knowledge, this variant has not been reported in the literature. This variant is reported in 0.058% of alleles in individuals of African descent in gnomAD. Although frameshift variants are known to be pathogenic, nearly all occur upstream of this variant. Therefore, at this time, the clinical significance of this variant is uncertain due to the absence of conclusive functional and genetic evidence. - |
Leber congenital amaurosis Uncertain:1
Uncertain significance, no assertion criteria provided | clinical testing | Natera, Inc. | Jan 27, 2020 | - - |
not provided Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | GeneDx | Jun 16, 2023 | Frameshift variant in which the last 15 amino acids are replaced with 20 different amino acids, and other loss-of-function variants have been reported downstream in the Human Gene Mutation Database (HGMD); Has not been previously published as pathogenic or benign to our knowledge; This variant is associated with the following publications: (PMID: 27535533, 34196655) - |
Meckel-Gruber syndrome;C0431399:Familial aplasia of the vermis;C0687120:Nephronophthisis Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | Invitae | Nov 01, 2022 | This sequence change results in a frameshift in the CEP290 gene (p.Glu2465Glnfs*21). While this is not anticipated to result in nonsense mediated decay, it is expected to disrupt the last 15 amino acid(s) of the CEP290 protein and extend the protein by 5 additional amino acid residues. This variant is present in population databases (rs757255407, gnomAD 0.06%). This variant has not been reported in the literature in individuals affected with CEP290-related conditions. ClinVar contains an entry for this variant (Variation ID: 966453). This variant disrupts the C-terminus of the CEP290 protein. Other variant(s) that disrupt this region (p.Glu2465Valfs*2) have been observed in individuals with CEP290-related conditions (PMID: 34196655). This suggests that this may be a clinically significant region of the protein. 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. - |
Computational scores
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Find out detailed SpliceAI scores and Pangolin per-transcript scores at