rs766608755

Variant names:

• chr12-88115143-CTCTT-C
• rs766608755
• NM_025114.4:c.1860_1863delAAGA

Variant summary

Our verdict is Pathogenic. Variant got 18 ACMG points: 18P and 0B. PVS1 PM2 PP5_Very_Strong

The NM_025114.4(CEP290):​c.1860_1863delAAGA​(p.Arg621IlefsTer2) variant causes a frameshift change. The variant allele was found at a frequency of 0.00000223 in 1,347,476 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Pathogenic (★★). Variant results in nonsense mediated mRNA decay.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000022 (0 hom.)
• Consequence: CEP290 NM_025114.4 frameshift
• Clinical Significance: Pathogenic criteria provided, multiple submitters, no conflicts P:5
• Conservation: PhyloP100: 4.47

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]

ACMG classification

Verdict is Pathogenic. Variant got 18 ACMG points.

• PVS1: Loss of function variant, product undergoes nonsense mediated mRNA decay. LoF is a known mechanism of disease.
• PM2: Very rare variant in population databases, with high coverage
• PP5: Variant 12-88115143-CTCTT-C is Pathogenic according to our data. Variant chr12-88115143-CTCTT-C is described in ClinVar as [Pathogenic]. Clinvar id is 194988.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr12-88115143-CTCTT-C is described in Lovd as [Pathogenic]. Variant chr12-88115143-CTCTT-C is described in Lovd as [Likely_pathogenic].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CEP290	NM_025114.4	c.1860_1863delAAGA	p.Arg621IlefsTer2	frameshift_variant	Exon 19 of 54	ENST00000552810.6	NP_079390.3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
CEP290	ENST00000552810.6	c.1860_1863delAAGA	p.Arg621IlefsTer2	frameshift_variant	Exon 19 of 54	1	NM_025114.4	ENSP00000448012.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD3 exomes AF: 0.0000147 AC: 3 AN: 204060 Hom.: 0 AF XY: 0.0000182 AC XY: 2 AN XY: 110122

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.0000399

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: 0.0000213

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000223 AC: 3 AN: 1347476 Hom.: 0 AF XY: 0.00000298 AC XY: 2 AN XY: 671886

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.0000286

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.0000132

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 9.71e-7

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:5

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

Leber congenital amaurosis Pathogenic:1

Apr 07, 2021

Natera, Inc.

Significance: Pathogenic

Review Status: no assertion criteria provided

Collection Method: clinical testing

- -

Leber congenital amaurosis 10 Pathogenic:1

Oct 04, 2024

Al Jalila Children’s Genomics Center, Al Jalila Childrens Speciality Hospital

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: research

PVS1,PM2,PM3 -

not provided Pathogenic:1

Aug 28, 2014

Eurofins Ntd Llc (ga)

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Bardet-Biedl syndrome 14 Pathogenic:1

Mar 01, 2024

Baylor Genetics

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Meckel-Gruber syndrome;C0431399:Familial aplasia of the vermis;C0687120:Nephronophthisis Pathogenic:1

May 15, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change creates a premature translational stop signal (p.Arg621Ilefs*2) in the CEP290 gene. It is expected to result in an absent or disrupted protein product. Loss-of-function variants in CEP290 are known to be pathogenic (PMID: 16909394, 17345604, 20690115). This variant is present in population databases (rs766608755, gnomAD 0.004%). This premature translational stop signal has been observed in individuals with CEP290-related conditions (PMID: 17345604, 27894351). This variant is also known as c.1855-1858delAAAG. ClinVar contains an entry for this variant (Variation ID: 194988). For these reasons, this variant has been classified as Pathogenic. -

Computational scores

Source: dbNSFP v4.3

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.010		Details are displayed if max score is > 0.2

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

Publications

LitVar

Other links and lift over

dbSNP: rs766608755; hg19: chr12-88508920;