chrX-38269742-G-T

Variant names:

• chrX-38269742-G-T
• rs1555958965
• ENST00000465127.1:c.172-396379G>T

Variant summary

Our verdict is Likely benign. Variant got -6 ACMG points: 0P and 6B. BP4_Moderate BS2

The NM_000328.3(RPGR):​c.2332C>A​(p.Gln778Lys) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000064 in 1,092,977 control chromosomes in the GnomAD database, with no homozygous occurrence. There are 3 hemizygotes in GnomAD. In-silico tool predicts a benign outcome for this variant. 13/17 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 23)
  • Exomes 𝑓: 0.0000064 (0 hom. 3 hem.)
• Consequence: RPGR NM_000328.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 1.65

Genes affected

ENSG00000250349 (HGNC:):

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 Likely_benign. Variant got -6 ACMG points.

• BP4: Computational evidence support a benign effect (MetaRNN=0.12877277).
• BS2: High Hemizygotes in GnomAdExome4 at 3 XL gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
RPGR	NM_000328.3	c.2332C>A	p.Gln778Lys	missense_variant	Exon 19 of 19		NP_000319.1
RPGR	NM_001367245.1	c.2329C>A	p.Gln777Lys	missense_variant	Exon 19 of 19		NP_001354174.1
RPGR	NM_001367246.1	c.2146C>A	p.Gln716Lys	missense_variant	Exon 18 of 18		NP_001354175.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
ENSG00000250349	ENST00000465127.1	c.172-396379G>T		intron_variant	Intron 3 of 8	5		ENSP00000417050.1

Frequencies

GnomAD3 genomes Cov.: 23

GnomAD4 exome AF: 0.00000640 AC: 7 AN: 1092977 Hom.: 0 Cov.: 28 AF XY: 0.00000837 AC XY: 3 AN XY: 358619

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.000232

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 23

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not provided Uncertain:1

Aug 01, 2017

CeGaT Center for Human Genetics Tuebingen

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.066
BayesDel_addAF	Benign	-0.35	T
BayesDel_noAF	Benign	-0.74
CADD	Benign	14
DANN	Benign	0.90
DEOGEN2	Benign	0.070	.;.;T;.;.
FATHMM_MKL	Benign	0.63	D
LIST_S2	Benign	0.53	.;T;T;T;T
M_CAP	Benign	0.021	T
MetaRNN	Benign	0.13	T;T;T;T;T
MetaSVM	Benign	-1.1	T
MutationAssessor	Benign	1.8	.;.;L;.;.
PROVEAN	Benign	-1.8	N;.;N;.;.
REVEL	Benign	0.020
Sift	Uncertain	0.020	D;.;D;.;.
Sift4G	Uncertain	0.023	D;.;T;.;.
Polyphen		0.30	B;B;.;.;.
Vest4		0.15
MutPred		0.24		Gain of methylation at Q778 (P = 0.0123);Gain of methylation at Q778 (P = 0.0123);.;.;.;
MVP		0.24
ClinPred		0.18	T
GERP RS		3.1
Varity_R		0.27

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: rs1555958965; hg19: chrX-38128995;