X-46837122-A-T

Variant names:

• chrX-46837122-A-T
• rs2147074627
• NM_006915.3:c.22A>T

Variant summary

Our verdict is Pathogenic. The variant received 12 ACMG points: 12P and 0B. PVS1 PM2 PP5_Moderate

The NM_006915.3(RP2):​c.22A>T​(p.Arg8*) variant causes a stop gained change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Pathogenic (★).

• Frequency:
  • Genomes: not found (cov: 23)
  • Exomes 𝑓: 0.0 (0 hom. 0 hem.)
  • Failed GnomAD Quality Control
• Consequence: RP2 NM_006915.3 stop_gained
• Clinical Significance: Pathogenic criteria provided, single submitter P:1
• Conservation: PhyloP100: 1.60
• Publications: 0 publications found

Genes affected

RP2 (HGNC:10274): (RP2 activator of ARL3 GTPase) The RP2 locus has been implicated as one cause of X-linked retinitis pigmentosa. The predicted gene product shows homology with human cofactor C, a protein involved in the ultimate step of beta-tubulin folding. Progressive retinal degeneration may therefore be due to the accumulation of incorrectly-folded photoreceptor or neuron-specific tubulin isoforms followed by progressive cell death [provided by RefSeq, Jul 2008]

RP2 Gene-Disease associations (from GenCC):

• retinitis pigmentosa 2

  Inheritance: XL Classification: DEFINITIVE, STRONG Submitted by: PanelApp Australia, Labcorp Genetics (formerly Invitae), G2P
• RP2-related retinopathy

  Inheritance: XL Classification: DEFINITIVE Submitted by: ClinGen
• retinitis pigmentosa

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

Our verdict: Pathogenic. The variant received 12 ACMG points.

• PVS1: Loss of function variant, product does not undergo nonsense mediated mRNA decay. Variant located near the start codon (<100nt), not predicted to undergo nonsense mediated mRNA decay. There are 142 pathogenic variants in the truncated region.
• PM2: Very rare variant in population databases, with high coverage
• PP5: Variant X-46837122-A-T is Pathogenic according to our data. Variant chrX-46837122-A-T is described in ClinVar as Pathogenic. ClinVar VariationId is 1457919.Status of the report is criteria_provided_single_submitter, 1 stars.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_006915.3. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	RP2	NM_006915.3	MANE Select	c.22A>T	p.Arg8*	stop_gained	Exon 1 of 5	NP_008846.2	O75695

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	RP2	ENST00000218340.4	TSL:1 MANE Select	c.22A>T	p.Arg8*	stop_gained	Exon 1 of 5	ENSP00000218340.3	O75695
	RP2	ENST00000891112.1		c.22A>T	p.Arg8*	stop_gained	Exon 1 of 6	ENSP00000561171.1
	RP2	ENST00000949778.1		c.22A>T	p.Arg8*	stop_gained	Exon 1 of 4	ENSP00000619837.1

Frequencies

GnomAD3 genomes Cov.: 23

GnomAD4 exome Data not reliable, filtered out with message: AC0 AF: 0.00 AC: 0 AN: 1055598 Hom.: 0 Cov.: 30 AF XY: 0.00 AC XY: 0 AN XY: 345434

African (AFR) AF: 0.00 AC: 0 AN: 24963

American (AMR) AF: 0.00 AC: 0 AN: 28108

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 18659

East Asian (EAS) AF: 0.00 AC: 0 AN: 27224

South Asian (SAS) AF: 0.00 AC: 0 AN: 49940

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 37757

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 4091

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 820395

Other (OTH) AF: 0.00 AC: 0 AN: 44461

GnomAD4 genome Cov.: 23

ClinVar

ClinVar submissions

Significance: Pathogenic

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
1	-	-	not provided (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Pathogenic	0.72	D
BayesDel_noAF	Pathogenic	0.44
CADD	Pathogenic	35
DANN	Uncertain	1.0
FATHMM_MKL	Uncertain	0.93	D
PhyloP100		1.6
Vest4		0.70
GERP RS		2.5
PromoterAI		0.041	Neutral
Mutation Taster		=4/196	disease causing (fs/PTC)

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

Other links and lift over

dbSNP: rs2147074627; hg19: chrX-46696557;