chr12-88111318-G-A

Position:

• chr12-88111318-G-A

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.2251C>T​(p.Arg751Ter) variant causes a stop gained change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000355 in 1,409,534 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Pathogenic (★★). Variant results in nonsense mediated mRNA decay.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000035 (0 hom.)
• Consequence: CEP290 NM_025114.4 stop_gained
• Clinical Significance: Pathogenic criteria provided, multiple submitters, no conflicts P:5
• Conservation: PhyloP100: 2.33

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 12-88111318-G-A is Pathogenic according to our data. Variant chr12-88111318-G-A is described in ClinVar as [Pathogenic]. Clinvar id is 585307.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr12-88111318-G-A is described in Lovd as [Pathogenic].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
CEP290	NM_025114.4	c.2251C>T	p.Arg751Ter	stop_gained	22/54	ENST00000552810.6	NP_079390.3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
CEP290	ENST00000552810.6	c.2251C>T	p.Arg751Ter	stop_gained	22/54	1	NM_025114.4	ENSP00000448012	P4

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 0.00000355 AC: 5 AN: 1409534 Hom.: 0 Cov.: 31 AF XY: 0.00000287 AC XY: 2 AN XY: 697686

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

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: 0.00000368

Gnomad4 OTH exome AF: 0.0000172

GnomAD4 genome Cov.: 32

Alfa AF: 0.0000324 Hom.: 0

Bravo AF: 0.00000756

ExAC AF: 0.0000167 AC: 2

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:5

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

not provided Pathogenic:1

Pathogenic, criteria provided, single submitter

clinical testing

Revvity Omics, Revvity

Dec 21, 2022

- -

Bardet-Biedl syndrome 14 Pathogenic:1

Pathogenic, criteria provided, single submitter

clinical testing

Baylor Genetics

Mar 07, 2023

- -

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

Pathogenic, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Nov 20, 2023

This sequence change creates a premature translational stop signal (p.Arg751*) 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). The frequency data for this variant in the population databases is considered unreliable, as metrics indicate poor data quality at this position in the gnomAD database. This premature translational stop signal has been observed in individual(s) with Joubert syndrome (PMID: 17409309). ClinVar contains an entry for this variant (Variation ID: 585307). Algorithms developed to predict the effect of sequence changes on RNA splicing suggest that this variant may disrupt the consensus splice site. For these reasons, this variant has been classified as Pathogenic. -

Senior-Loken syndrome 6;C1857780:Joubert syndrome 5;C1857821:Leber congenital amaurosis 10;C1970161:Meckel syndrome, type 4;C2673874:Bardet-Biedl syndrome 14 Pathogenic:1

Pathogenic, criteria provided, single submitter

clinical testing

Fulgent Genetics, Fulgent Genetics

May 02, 2022

- -

Joubert syndrome 5 Pathogenic:1

Pathogenic, criteria provided, single submitter

clinical testing

Molecular Diagnostics Laboratory, M Health Fairview: University of Minnesota

Jan 30, 2017

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Pathogenic	0.63	D
BayesDel_noAF	Pathogenic	0.30
CADD	Pathogenic	37
DANN	Uncertain	1.0
Eigen	Uncertain	0.52
Eigen_PC	Uncertain	0.36
FATHMM_MKL	Benign	0.69	D
MutationTaster	Benign	1.0	A;A;N
Vest4		0.92
GERP RS		2.9

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.0		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: rs753884599; hg19: chr12-88505095;