rs1555965712

Positions:

• chrX-38304793-G-T

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 3P and 1B. PM2 PP5 BP4

The NM_001034853.2(RPGR):​c.779-3C>A variant causes a splice region, splice polypyrimidine tract, intron change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 2/3 splice prediction tools predict no significant impact on normal splicing. Variant has been reported in ClinVar as Likely pathogenic (no stars).

• Frequency: Genomes: not found (cov: 23)
• Consequence: RPGR NM_001034853.2 splice_region, splice_polypyrimidine_tract, intron
• Scores: Splicing: ADA: 0.8410
• Clinical Significance: Likely pathogenic no assertion criteria provided P:1
• Conservation: PhyloP100: 2.06

Genes affected

RPGR (HGNC:10295): (retinitis pigmentosa GTPase regulator) This gene encodes a protein with a series of six RCC1-like domains (RLDs), characteristic of the highly conserved guanine nucleotide exchange factors. The encoded protein is found in the Golgi body and interacts with RPGRIP1. This protein localizes to the outer segment of rod photoreceptors and is essential for their viability. Mutations in this gene have been associated with X-linked retinitis pigmentosa (XLRP). Multiple alternatively spliced transcript variants that encode different isoforms of this gene have been reported, but the full-length natures of only some have been determined. [provided by RefSeq, Dec 2008]

ACMG classification

Verdict is Uncertain_significance. Variant got 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP5: Variant X-38304793-G-T is Pathogenic according to our data. Variant chrX-38304793-G-T is described in ClinVar as [Likely_pathogenic]. Clinvar id is 438147.Status of the report is no_assertion_criteria_provided, 0 stars. Variant chrX-38304793-G-T is described in Lovd as [Likely_pathogenic].
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.48). . Strength limited to SUPPORTING due to the PP5.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
RPGR	NM_001034853.2	c.779-3C>A		splice_region_variant, splice_polypyrimidine_tract_variant, intron_variant		ENST00000645032.1	NP_001030025.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
RPGR	ENST00000645032.1	c.779-3C>A		splice_region_variant, splice_polypyrimidine_tract_variant, intron_variant			NM_001034853.2	ENSP00000495537	A2

Frequencies

GnomAD3 genomes Cov.: 23

GnomAD4 exome Cov.: 29

GnomAD4 genome Cov.: 23

ClinVar

Significance: Likely pathogenic

Submissions summary: Pathogenic:1

Revision: no assertion criteria provided

Submissions by phenotype

Retinitis pigmentosa Pathogenic:1

Likely pathogenic, no assertion criteria provided

research

NIHR Bioresource Rare Diseases, University of Cambridge

Jan 01, 2015

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Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.48
CADD	Benign	15
DANN	Benign	0.55
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		2.1

Splicing

Name	Calibrated prediction	Score	Prediction
dbscSNV1_ADA	Benign	0.84
dbscSNV1_RF	Benign	0.57
SpliceAI score (max)		0.85		Details are displayed if max score is > 0.2
DS_AL_spliceai		0.85		Position offset: -3

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

Publications

LitVar

Other links and lift over

dbSNP: rs1555965712; hg19: chrX-38164046;