chr12-88140985-G-A

Position:

• chr12-88140985-G-A

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 2P and 1B. PM2 BP4

The NM_025114.4(CEP290):​c.151C>T​(p.Leu51Phe) variant causes a missense change. The variant allele was found at a frequency of 0.00000139 in 1,438,626 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★).

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000014 (0 hom.)
• Consequence: CEP290 NM_025114.4 missense
• Clinical Significance: Uncertain significance criteria provided, multiple submitters, no conflicts U:2
• Conservation: PhyloP100: 4.14

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 Uncertain_significance. Variant got 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.42016548).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
CEP290	NM_025114.4	c.151C>T	p.Leu51Phe	missense_variant	3/54	ENST00000552810.6

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
CEP290	ENST00000552810.6	c.151C>T	p.Leu51Phe	missense_variant	3/54	1	NM_025114.4	P4

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 0.00000139 AC: 2 AN: 1438626 Hom.: 0 Cov.: 29 AF XY: 0.00000140 AC XY: 1 AN XY: 714124

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.0000247

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: 9.06e-7

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

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

Jun 27, 2022

This sequence change replaces leucine, which is neutral and non-polar, with phenylalanine, which is neutral and non-polar, at codon 51 of the CEP290 protein (p.Leu51Phe). This variant is not present in population databases (gnomAD no frequency). This missense change has been observed in individual(s) with clinical features of Senior-Loken syndrome (Invitae). In at least one individual the data is consistent with being in trans (on the opposite chromosome) from a pathogenic variant. ClinVar contains an entry for this variant (Variation ID: 530916). Algorithms developed to predict the effect of missense changes on protein structure and function are either unavailable or do not agree on the potential impact of this missense change (SIFT: "Tolerated"; PolyPhen-2: "Probably Damaging"; Align-GVGD: "Class C0"). 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

Dec 01, 2021

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.30
BayesDel_addAF	Pathogenic	0.21	D
BayesDel_noAF	Uncertain	0.060
CADD	Uncertain	25
DANN	Pathogenic	1.0
DEOGEN2	Benign	0.32	.;T;.;.;T
Eigen	Uncertain	0.63
Eigen_PC	Uncertain	0.66
FATHMM_MKL	Uncertain	0.83	D
LIST_S2	Uncertain	0.89	D;D;D;D;D
M_CAP	Benign	0.077	D
MetaRNN	Benign	0.42	T;T;T;T;T
MetaSVM	Uncertain	0.55	D
MutationAssessor	Uncertain	2.1	.;M;.;.;.
MutationTaster	Benign	1.0	D;D;D
PrimateAI	Uncertain	0.65	T
PROVEAN	Benign	-1.3	N;N;.;D;.
REVEL	Uncertain	0.40
Sift	Uncertain	0.017	D;D;.;D;.
Sift4G	Uncertain	0.020	D;D;T;T;D
Polyphen		1.0	.;D;.;.;.
Vest4		0.53
MutPred		0.27		Gain of catalytic residue at R53 (P = 0.0023);Gain of catalytic residue at R53 (P = 0.0023);Gain of catalytic residue at R53 (P = 0.0023);Gain of catalytic residue at R53 (P = 0.0023);.;
MVP		0.89
MPC		0.36
ClinPred		0.89	D
GERP RS		5.9
Varity_R		0.19
gMVP		0.53

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.060		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: rs1264332374; hg19: chr12-88534762;