rs768169831

chrX-38287906-T-C

Variant summary

Our verdict is Benign. Variant got -9 ACMG points: 0P and 9B. BP4_Strong BP6 BS2

The NM_001034853.2(RPGR):c.1708A>G(p.Thr570Ala) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000282 in 1,097,412 control chromosomes in the GnomAD database, with no homozygous occurrence. There are 17 hemizygotes in GnomAD. In-silico tool predicts a benign outcome for this variant. 13/19 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. T570M) has been classified as Likely benign.

• Frequency:
  • Genomes: not found (cov: 23)
  • Exomes 𝑓: 0.000028 (0 hom. 17 hem.)
• Consequence: RPGR NM_001034853.2 missense
• Clinical Significance: Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:2 B:2
• Conservation: PhyloP100: -0.251

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 Benign. Variant got -9 ACMG points.

• BP4: Computational evidence support a benign effect (MetaRNN=0.038601905).
• BP6: Variant X-38287906-T-C is Benign according to our data. Variant chrX-38287906-T-C is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 414013.We mark this variant Likely_benign, oryginal submissions are: {Uncertain_significance=2, Likely_benign=2}.
• BS2: High Hemizygotes in GnomAdExome at 9 XL gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
RPGR	NM_001034853.2	c.1708A>G	p.Thr570Ala	missense_variant	14/15	ENST00000645032.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
RPGR	ENST00000645032.1	c.1708A>G	p.Thr570Ala	missense_variant	14/15		NM_001034853.2	A2

Frequencies

GnomAD3 genomes Cov.: 23

GnomAD3 exomes AF: 0.000115 AC: 21 AN: 182608 Hom.: 0 AF XY: 0.000134 AC XY: 9 AN XY: 67190

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.000512

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.000372

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.0000282 AC: 31 AN: 1097412 Hom.: 0 Cov.: 31 AF XY: 0.0000469 AC XY: 17 AN XY: 362832

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.000455

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.000259

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00

Gnomad4 OTH exome AF: 0.0000217

GnomAD4 genome Cov.: 23

Bravo AF: 0.0000529

ExAC AF: 0.0000988 AC: 12

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:2 Benign:2

Revision: criteria provided, conflicting classifications

Submissions by phenotype

Primary ciliary dyskinesia Uncertain:1 Benign:1

Likely benign, criteria provided, single submitter	clinical testing	Invitae	Dec 01, 2023	- -
Uncertain significance, criteria provided, single submitter	clinical testing	Ambry Genetics	Aug 26, 2021	The p.T570A variant (also known as c.1708A>G), located in coding exon 14 of the RPGR gene, results from an A to G substitution at nucleotide position 1708. The threonine at codon 570 is replaced by alanine, an amino acid with similar properties. This amino acid position is conserved. In addition, this alteration is predicted to be tolerated by in silico analysis. Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear. -

not provided Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

PreventionGenetics, part of Exact Sciences

Dec 01, 2020

- -

X-linked cone-rod dystrophy 1;C1845667:Retinitis pigmentosa 3;C2749137:Retinitis pigmentosa, X-linked, and sinorespiratory infections, with or without deafness;C3151784:Macular degeneration, X-linked atrophic Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Fulgent Genetics, Fulgent Genetics

Oct 14, 2021

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.077
BayesDel_addAF	Benign	-0.72	T
BayesDel_noAF	Benign	-0.93
Cadd	Benign	0.13
Dann	Benign	0.49
FATHMM_MKL	Benign	0.028	N
M_CAP	Benign	0.0059	T
MetaRNN	Benign	0.039	T;T;T;T;T;T
MetaSVM	Benign	-1.1	T
MutationAssessor	Benign	0.55	N;N;N;.;N;N
MutationTaster	Benign	1.0	N;N;N;N;N;N
PrimateAI	Benign	0.27	T
PROVEAN	Benign	-0.99	N;.;N;.;.;N
REVEL	Benign	0.044
Sift	Benign	0.14	T;.;T;.;.;.
Sift4G	Benign	0.70	T;.;T;.;.;T
Polyphen		0.79	P;P;.;.;.;.
Vest4		0.042
MutPred		0.18		Gain of sheet (P = 0.0827);Gain of sheet (P = 0.0827);Gain of sheet (P = 0.0827);.;Gain of sheet (P = 0.0827);Gain of sheet (P = 0.0827);
MVP		0.17
MPC		0.021
ClinPred		0.028	T
GERP RS		-1.7
Varity_R		0.032
gMVP		0.034

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: rs768169831; hg19: chrX-38147159;