chr14-21328469-C-T

Variant names:

• chr14-21328469-C-T
• rs780667159
• NM_020366.4:c.2941C>T

Variant summary

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

The NM_020366.4(RPGRIP1):​c.2941C>T​(p.Arg981*) variant causes a stop gained change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000753 in 1,461,572 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: 31)
  • Exomes 𝑓: 0.0000075 (0 hom.)
• Consequence: RPGRIP1 NM_020366.4 stop_gained
• Clinical Significance: Pathogenic criteria provided, multiple submitters, no conflicts P:8
• Conservation: PhyloP100: 1.28

Genes affected

RPGRIP1 (HGNC:13436): (RPGR interacting protein 1) This gene encodes a photoreceptor protein that interacts with retinitis pigmentosa GTPase regulator protein and is a key component of cone and rod photoreceptor cells. Mutations in this gene lead to autosomal recessive congenital blindness. [provided by RefSeq, Oct 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 14-21328469-C-T is Pathogenic according to our data. Variant chr14-21328469-C-T is described in ClinVar as [Pathogenic]. Clinvar id is 438163.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr14-21328469-C-T is described in Lovd as [Likely_pathogenic].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
RPGRIP1	NM_020366.4	c.2941C>T	p.Arg981*	stop_gained	Exon 19 of 25	ENST00000400017.7	NP_065099.3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
RPGRIP1	ENST00000400017.7	c.2941C>T	p.Arg981*	stop_gained	Exon 19 of 25	1	NM_020366.4	ENSP00000382895.2

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD3 exomes AF: 0.00000401 AC: 1 AN: 249126 Hom.: 0 AF XY: 0.00000740 AC XY: 1 AN XY: 135158

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

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: 0.00000886

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000753 AC: 11 AN: 1461572 Hom.: 0 Cov.: 31 AF XY: 0.00000963 AC XY: 7 AN XY: 727078

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: 0.0000116

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00000810

Gnomad4 OTH exome AF: 0.0000166

GnomAD4 genome Cov.: 31

Bravo AF: 0.0000113

ExAC AF: 0.00000828 AC: 1

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:8

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

Leber congenital amaurosis 6 Pathogenic:3

Nov 07, 2021

Genome-Nilou Lab

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

-

Laboratory of Genetics in Ophthalmology, Institut Imagine

Significance: Pathogenic

Review Status: no assertion criteria provided

Collection Method: research

- -

Apr 01, 2023

Clinical Laboratory Sciences Program (CLSP), King Saud bin Abdulaziz University for Health Sciences (KSAU-HS)

Significance: Pathogenic

Review Status: no assertion criteria provided

Collection Method: clinical testing

- -

Leber congenital amaurosis Pathogenic:2

Jan 01, 2015

NIHR Bioresource Rare Diseases, University of Cambridge

Significance: Likely pathogenic

Review Status: no assertion criteria provided

Collection Method: research

- -

Jul 24, 2023

Ophthalmic Genetics Group, Institute of Molecular and Clinical Ophthalmology Basel

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: research

Clinical significance based on ACMG v2.0 -

Leber congenital amaurosis 6;C2750720:Cone-rod dystrophy 13 Pathogenic:1

Dec 04, 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.Arg981*) in the RPGRIP1 gene. It is expected to result in an absent or disrupted protein product. Loss-of-function variants in RPGRIP1 are known to be pathogenic (PMID: 11528500, 23105016). This variant is present in population databases (rs780667159, gnomAD 0.0009%). This premature translational stop signal has been observed in individuals with Leber congenital amaurosis (PMID: 28041643, 30576320). ClinVar contains an entry for this variant (Variation ID: 438163). For these reasons, this variant has been classified as Pathogenic. -

Leber congenital amaurosis 1 Pathogenic:1

May 28, 2019

Mendelics

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Cone-rod dystrophy 13 Pathogenic:1

Nov 07, 2021

Genome-Nilou Lab

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Pathogenic	0.63	D
BayesDel_noAF	Pathogenic	0.25
CADD	Pathogenic	35
DANN	Uncertain	0.98
Eigen	Benign	-0.067
Eigen_PC	Benign	-0.41
FATHMM_MKL	Benign	0.033	N
Vest4		0.77
GERP RS		1.7

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: rs780667159; hg19: chr14-21796628; COSMIC: COSV52859324; COSMIC: COSV52859324;