rs1554519422

Variant names:

• chr8-54625149-GCTAGTTGGGAGAATGCTACTGTGGACACAGATATCATCCAGGGAACTCAAGACCAAGCAAAGCATCGTTTTTATAGGCCCCCTACACCTGGACTAAGAAGAGTGAGACAAAAGAAATCTGTGATTGGCAGTGTGACCTTAGTATCTGAAACTGAGGTTCAAGAGAAAATGATTGGACAGTTTTCATATAGTGAAGAAAGGGAAAGTGGGGAAAACAAGTCTGAGTATCACATGTTTACACATTCTTGCAGTAAAATGTCATCAGTATCTAACAAACCAGTACTTGTTCAGATCAATAACAATGATCAAATGGAGGAGTCATCATTAGAAAGAAAAAAGGAAAACAGTCTGCTTAAGTCAAGTGCAATAAGTGCTGGTGTTATAGAAATT-A
• rs1554519422
• NM_006269.2:c.1267_1656delGCTAGTTGGGAGAATGCTACTGTGGACACAGATATCATCCAGGGAACTCAAGACCAAGCAAAGCATCGTTTTTATAGGCCCCCTACACCTGGACTAAGAAGAGTGAGACAAAAGAAATCTGTGATTGGCAGTGTGACCTTAGTATCTGAAACTGAGGTTCAAGAGAAAATGATTGGACAGTTTTCATATAGTGAAGAAAGGGAAAGTGGGGAAAACAAGTCTGAGTATCACATGTTTACACATTCTTGCAGTAAAATGTCATCAGTATCTAACAAACCAGTACTTGTTCAGATCAATAACAATGATCAAATGGAGGAGTCATCATTAGAAAGAAAAAAGGAAAACAGTCTGCTTAAGTCAAGTGCAATAAGTGCTGGTGTTATAGAAATTinsA

Variant summary

Our verdict is Likely pathogenic. The variant received 9 ACMG points: 9P and 0B. PVS1 PP5

The NM_006269.2(RP1):​c.1267_1656delGCTAGTTGGGAGAATGCTACTGTGGACACAGATATCATCCAGGGAACTCAAGACCAAGCAAAGCATCGTTTTTATAGGCCCCCTACACCTGGACTAAGAAGAGTGAGACAAAAGAAATCTGTGATTGGCAGTGTGACCTTAGTATCTGAAACTGAGGTTCAAGAGAAAATGATTGGACAGTTTTCATATAGTGAAGAAAGGGAAAGTGGGGAAAACAAGTCTGAGTATCACATGTTTACACATTCTTGCAGTAAAATGTCATCAGTATCTAACAAACCAGTACTTGTTCAGATCAATAACAATGATCAAATGGAGGAGTCATCATTAGAAAGAAAAAAGGAAAACAGTCTGCTTAAGTCAAGTGCAATAAGTGCTGGTGTTATAGAAATTinsA​(p.Ala423AsnfsTer11) variant causes a frameshift, missense change. The variant was absent in control chromosomes in GnomAD project. It is difficult to determine the true allele frequency of this variant because it is of type DEL_BIG, and the frequency of such variant types in population databases may be underestimated and unreliable. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars). Synonymous variant affecting the same amino acid position (i.e. A423A) has been classified as Likely benign.

• Frequency: Genomes: not found (cov: 32)
• Consequence: RP1 NM_006269.2 frameshift, missense
• Clinical Significance: Conflicting classifications of pathogenicity criteria provided, conflicting classifications P:1 U:1
• Conservation: PhyloP100: 4.58
• Publications: 1 publications found

Genes affected

RP1 (HGNC:10263): (RP1 axonemal microtubule associated) This gene encodes a member of the doublecortin family. The protein encoded by this gene contains two doublecortin domains, which bind microtubules and regulate microtubule polymerization. The encoded protein is a photoreceptor microtubule-associated protein and is required for correct stacking of outer segment disc. This protein and the RP1L1 protein, another retinal-specific protein, play essential and synergistic roles in affecting photosensitivity and outer segment morphogenesis of rod photoreceptors. Because of its response to in vivo retinal oxygen levels, this protein was initially named ORP1 (oxygen-regulated protein-1). This protein was subsequently designated RP1 (retinitis pigmentosa 1) when it was found that mutations in this gene cause autosomal dominant retinitis pigmentosa. Mutations in this gene also cause autosomal recessive retinitis pigmentosa. Transcript variants resulted from an alternative promoter and alternative splicings have been found, which overlap the current reference sequence and has several exons upstream and downstream of the current reference sequence. However, the biological validity and full-length nature of some variants cannot be determined at this time.[provided by RefSeq, Sep 2010]

RP1 Gene-Disease associations (from GenCC):

• RP1-related dominant retinopathy

  Inheritance: AD, SD Classification: DEFINITIVE, STRONG Submitted by: Ambry Genetics, ClinGen
• retinitis pigmentosa 1

  Inheritance: AR, AD Classification: DEFINITIVE, STRONG Submitted by: G2P, Illumina, Labcorp Genetics (formerly Invitae), Ambry Genetics
• RP1-related recessive retinopathy

  Inheritance: AR Classification: DEFINITIVE Submitted by: Ambry Genetics, ClinGen
• retinitis pigmentosa

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

Our verdict: Likely_pathogenic. The variant received 9 ACMG points.

• PVS1: Loss of function variant, product does not undergo nonsense mediated mRNA decay. Variant is located in the 3'-most exon, not predicted to undergo nonsense mediated mRNA decay. There are 253 pathogenic variants in the truncated region.
• PP5: Variant 8-54625149-GCTAGTTGGGAGAATGCTACTGTGGACACAGATATCATCCAGGGAACTCAAGACCAAGCAAAGCATCGTTTTTATAGGCCCCCTACACCTGGACTAAGAAGAGTGAGACAAAAGAAATCTGTGATTGGCAGTGTGACCTTAGTATCTGAAACTGAGGTTCAAGAGAAAATGATTGGACAGTTTTCATATAGTGAAGAAAGGGAAAGTGGGGAAAACAAGTCTGAGTATCACATGTTTACACATTCTTGCAGTAAAATGTCATCAGTATCTAACAAACCAGTACTTGTTCAGATCAATAACAATGATCAAATGGAGGAGTCATCATTAGAAAGAAAAAAGGAAAACAGTCTGCTTAAGTCAAGTGCAATAAGTGCTGGTGTTATAGAAATT-A is Pathogenic according to our data. Variant chr8-54625149-GCTAGTTGGGAGAATGCTACTGTGGACACAGATATCATCCAGGGAACTCAAGACCAAGCAAAGCATCGTTTTTATAGGCCCCCTACACCTGGACTAAGAAGAGTGAGACAAAAGAAATCTGTGATTGGCAGTGTGACCTTAGTATCTGAAACTGAGGTTCAAGAGAAAATGATTGGACAGTTTTCATATAGTGAAGAAAGGGAAAGTGGGGAAAACAAGTCTGAGTATCACATGTTTACACATTCTTGCAGTAAAATGTCATCAGTATCTAACAAACCAGTACTTGTTCAGATCAATAACAATGATCAAATGGAGGAGTCATCATTAGAAAGAAAAAAGGAAAACAGTCTGCTTAAGTCAAGTGCAATAAGTGCTGGTGTTATAGAAATT-A is described in ClinVar as Conflicting_classifications_of_pathogenicity. ClinVar VariationId is 547180.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
RP1	NM_006269.2	c.1267_1656delGCTAGTTGGGAGAATGCTACTGTGGACACAGATATCATCCAGGGAACTCAAGACCAAGCAAAGCATCGTTTTTATAGGCCCCCTACACCTGGACTAAGAAGAGTGAGACAAAAGAAATCTGTGATTGGCAGTGTGACCTTAGTATCTGAAACTGAGGTTCAAGAGAAAATGATTGGACAGTTTTCATATAGTGAAGAAAGGGAAAGTGGGGAAAACAAGTCTGAGTATCACATGTTTACACATTCTTGCAGTAAAATGTCATCAGTATCTAACAAACCAGTACTTGTTCAGATCAATAACAATGATCAAATGGAGGAGTCATCATTAGAAAGAAAAAAGGAAAACAGTCTGCTTAAGTCAAGTGCAATAAGTGCTGGTGTTATAGAAATTinsA	p.Ala423AsnfsTer11	frameshift_variant, missense_variant	Exon 4 of 4	ENST00000220676.2	NP_006260.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
RP1	ENST00000220676.2	c.1267_1656delGCTAGTTGGGAGAATGCTACTGTGGACACAGATATCATCCAGGGAACTCAAGACCAAGCAAAGCATCGTTTTTATAGGCCCCCTACACCTGGACTAAGAAGAGTGAGACAAAAGAAATCTGTGATTGGCAGTGTGACCTTAGTATCTGAAACTGAGGTTCAAGAGAAAATGATTGGACAGTTTTCATATAGTGAAGAAAGGGAAAGTGGGGAAAACAAGTCTGAGTATCACATGTTTACACATTCTTGCAGTAAAATGTCATCAGTATCTAACAAACCAGTACTTGTTCAGATCAATAACAATGATCAAATGGAGGAGTCATCATTAGAAAGAAAAAAGGAAAACAGTCTGCTTAAGTCAAGTGCAATAAGTGCTGGTGTTATAGAAATTinsA	p.Ala423AsnfsTer11	frameshift_variant, missense_variant	Exon 4 of 4	1	NM_006269.2	ENSP00000220676.1
RP1	ENST00000637698.1	c.787+2861_787+3250delGCTAGTTGGGAGAATGCTACTGTGGACACAGATATCATCCAGGGAACTCAAGACCAAGCAAAGCATCGTTTTTATAGGCCCCCTACACCTGGACTAAGAAGAGTGAGACAAAAGAAATCTGTGATTGGCAGTGTGACCTTAGTATCTGAAACTGAGGTTCAAGAGAAAATGATTGGACAGTTTTCATATAGTGAAGAAAGGGAAAGTGGGGAAAACAAGTCTGAGTATCACATGTTTACACATTCTTGCAGTAAAATGTCATCAGTATCTAACAAACCAGTACTTGTTCAGATCAATAACAATGATCAAATGGAGGAGTCATCATTAGAAAGAAAAAAGGAAAACAGTCTGCTTAAGTCAAGTGCAATAAGTGCTGGTGTTATAGAAATTinsA		intron_variant	Intron 3 of 28	5		ENSP00000490104.1
RP1	ENST00000636932.1	c.787+2861_787+3250delGCTAGTTGGGAGAATGCTACTGTGGACACAGATATCATCCAGGGAACTCAAGACCAAGCAAAGCATCGTTTTTATAGGCCCCCTACACCTGGACTAAGAAGAGTGAGACAAAAGAAATCTGTGATTGGCAGTGTGACCTTAGTATCTGAAACTGAGGTTCAAGAGAAAATGATTGGACAGTTTTCATATAGTGAAGAAAGGGAAAGTGGGGAAAACAAGTCTGAGTATCACATGTTTACACATTCTTGCAGTAAAATGTCATCAGTATCTAACAAACCAGTACTTGTTCAGATCAATAACAATGATCAAATGGAGGAGTCATCATTAGAAAGAAAAAAGGAAAACAGTCTGCTTAAGTCAAGTGCAATAAGTGCTGGTGTTATAGAAATTinsA		intron_variant	Intron 3 of 22	5		ENSP00000489857.1

Frequencies

GnomAD3 genomes Cov.: 32

We have no GnomAD4 exomes data on this position. Probably position not covered by the project.

GnomAD4 genome Cov.: 32

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Pathogenic:1 Uncertain:1

Revision: criteria provided, conflicting classifications

Submissions by phenotype

not provided Pathogenic:1

Nov 21, 2022

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change creates a premature translational stop signal (p.Ala423Asnfs*11) in the RP1 gene. While this is not anticipated to result in nonsense mediated decay, it is expected to disrupt the last 1734 amino acid(s) of the RP1 protein. This variant is not present in population databases (gnomAD no frequency). This variant has not been reported in the literature in individuals affected with RP1-related conditions. ClinVar contains an entry for this variant (Variation ID: 547180). This variant disrupts the C-terminus of the RP1 protein. Many variants that disrupt this region have been reported in individuals with either autosomal dominant or autosomal recessive retinitis pigmentosa (PMID: 11527933, 19933189, 29425069, 30027431, 33681214). Therefore, variants that disrupt this region are expected to be disease-causing. For these reasons, this variant has been classified as Pathogenic. -

Leber congenital amaurosis 1 Uncertain:1

Nov 30, 2017

Australian Inherited Retinal Disease Registry & DNA Bank, Sir Charles Gairdner Hospital

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: research

Detected in an unaffected mother, and in an affected individual with another genetic cause for disease; not considered primary cause of disease -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
PhyloP100		4.6

Splicing

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

Other links and lift over

dbSNP: rs1554519422; hg19: chr8-55537709;