X-46853826-C-T

Variant names:

• chrX-46853826-C-T
• rs104894926
• NM_006915.3:c.453C>T

Variant summary

Our verdict is Likely benign. The variant received -3 ACMG points: 2P and 5B. PM2 BP4_Strong BP7

The NM_006915.3(RP2):​c.453C>T​(p.Tyr151Tyr) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000911 in 1,098,007 control chromosomes in the GnomAD database, with no homozygous occurrence. There are no hemizygote samples in GnomAD. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency:
  • Genomes: not found (cov: 22)
  • Exomes 𝑓: 9.1e-7 (0 hom. 0 hem.)
• Consequence: RP2 NM_006915.3 synonymous
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 1.96
• 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: 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: Likely_benign. The variant received -3 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.51).
• BP7: Synonymous conserved (PhyloP=1.96 with no splicing effect.

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.453C>T	p.Tyr151Tyr	synonymous	Exon 2 of 5	NP_008846.2

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	RP2	ENST00000218340.4	TSL:1 MANE Select	c.453C>T	p.Tyr151Tyr	synonymous	Exon 2 of 5	ENSP00000218340.3
	RP2	ENST00000891112.1		c.453C>T	p.Tyr151Tyr	synonymous	Exon 2 of 6	ENSP00000561171.1
	RP2	ENST00000949778.1		c.103-6162C>T		intron	N/A	ENSP00000619837.1

Frequencies

GnomAD3 genomes Cov.: 22

GnomAD4 exome AF: 9.11e-7 AC: 1 AN: 1098007 Hom.: 0 Cov.: 31 AF XY: 0.00 AC XY: 0 AN XY: 363367

African (AFR) AF: 0.00 AC: 0 AN: 26399

American (AMR) AF: 0.00 AC: 0 AN: 35207

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 19384

East Asian (EAS) AF: 0.00 AC: 0 AN: 30206

South Asian (SAS) AF: 0.00 AC: 0 AN: 54143

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 40524

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 4136

European-Non Finnish (NFE) AF: 0.00000119 AC: 1 AN: 841918

Other (OTH) AF: 0.00 AC: 0 AN: 46090

GnomAD4 genome Cov.: 22

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.51
CADD	Benign	6.5
DANN	Benign	0.43
PhyloP100		2.0

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: rs104894926; hg19: chrX-46713261;