12-88049231-C-CTG

Position:

chr12-88049231-C-CTG

Variant summary

Our verdict is Uncertain significance. Variant got 4 ACMG points: 4P and 0B. PVS1_ModeratePM2

The NM_025114.4(CEP290):c.7392_7393insCA(p.Glu2465fs) 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 (★★).

Frequency

Genomes: 𝑓 0.00016 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000016 ( 0 hom. )

Consequence

CEP290
NM_025114.4 frameshift

Scores

Not classified

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:5

Conservation

PhyloP100: 0.0130

Variant links:

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]

CEP290 links:

RLIG1 (HGNC:25322): (RNA 5'-phosphate and 3'-OH ligase 1) Predicted to act upstream of or within hematopoietic progenitor cell differentiation. [provided by Alliance of Genome Resources, Apr 2022]

RLIG1 links:

CEP290 (HGNC:):

CEP290 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 4 ACMG points.

PVS1

Loss of function variant, product does not undergo nonsense mediated mRNA decay. Variant is located in the 3'-most exon, not predicted to undergo nonsense mediated mRNA decay. Fraction of 0.00645 CDS is truncated, and there are 1 pathogenic variants in the truncated region.

PM2

Very rare variant in population databases, with high coverage;

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
CEP290	NM_025114.4 linkuse as main transcript	c.7392_7393insCA	p.Glu2465fs	frameshift_variant	54/54	ENST00000552810.6	NP_079390.3	O15078Q05BJ6
RLIG1	NM_001009894.3 linkuse as main transcript	c.810_811insGT		3_prime_UTR_variant	7/7	ENST00000356891.4	NP_001009894.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
CEP290	ENST00000552810.6 linkuse as main transcript	c.7392_7393insCA	p.Glu2465fs	frameshift_variant	54/54	1	NM_025114.4	ENSP00000448012.1		O15078
C12orf29	ENST00000356891.4 linkuse as main transcript	c.810_811insGT		3_prime_UTR_variant	7/7	1	NM_001009894.3	ENSP00000349358.3		Q8N999-1

Frequencies

GnomAD3 genomes

AF:

0.000158

AC:

AN:

151908

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000579

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000449

AC:

AN:

244852

Hom.:

AF XY:

0.0000226

AC XY:

AN XY:

132974

show subpopulations

Gnomad AFR exome

AF:

0.000520

Gnomad AMR exome

AF:

0.0000878

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000165

AC:

AN:

1456460

Hom.:

Cov.:

AF XY:

0.00000690

AC XY:

AN XY:

724152

show subpopulations

Gnomad4 AFR exome

AF:

0.000450

Gnomad4 AMR exome

AF:

0.0000675

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00

Gnomad4 OTH exome

AF:

0.0000999

GnomAD4 genome

AF:

0.000158

AC:

AN:

152024

Hom.:

Cov.:

AF XY:

0.000215

AC XY:

AN XY:

74304

show subpopulations

Gnomad4 AFR

AF:

0.000578

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:5

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

CEP290-related disorder

Uncertain:1

Uncertain significance, no assertion criteria provided

clinical testing

PreventionGenetics, part of Exact Sciences

Aug 07, 2024

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

Sep 30, 2024

Frameshift variant predicted to result in abnormal protein length as the last 15 amino acid(s) are replaced with 20 different amino acid(s), and other similar variants have been reported in HGMD; Has not been previously published as pathogenic or benign to our knowledge; This variant is associated with the following publications: (PMID: 34196655) -

Meckel-Gruber syndrome;C0431399:Familial aplasia of the vermis;C0687120:Nephronophthisis

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

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. -

Senior-Loken syndrome 6;C1857780:Joubert syndrome 5;C1857821:Leber congenital amaurosis 10;C1970161:Meckel syndrome, type 4;C2673874:Bardet-Biedl syndrome 14

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Fulgent Genetics, Fulgent Genetics

Jun 11, 2024

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

Splicing

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

LitVar

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over