Evidence map›Paper›PMID 12724644›Full record

ArticleMolecular vision2003

Characterization of RP1L1, a highly polymorphic paralog of the retinitis pigmentosa 1 (RP1) gene.

Sara J Bowne, Stephen P Daiger, Kimberly A Malone, John R Heckenlively, Avril Kennan, Peter Humphries, Dianna Hughbanks-Wheaton, David G Birch, Qin Liu, Eric A Pierce and 4 more

Open access · greenAbstract readComparative Study
In one paragraph

Article in Molecular vision, 2003. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 24 papers.

0numbers the graph read from it
0cells of the map it votes in
24citing papers in PubMed
0.3field-weighted citation impact, top 41% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

24 citing papers in PubMed, 51 citations in OpenAlex.

  1. Trial
  2. Evolution of vitelliform maculopathy in a pediatric patient with a homozygousAmerican journal of ophthalmology case reports · 2025
    Article
  3. Review
  4. Phenotypic and Genotypic Characterization of RP1L1-Associated Retinopathy.Investigative ophthalmology & visual science · 2025
    Article
  5. Article
  6. Review
  7. Article
  8. Article
  9. New recessive compound heterozygous variants ofInternational journal of ophthalmology · 2024
    Article
  10. Article
  11. Article
  12. Article
  13. Article
  14. Photoreceptor Cilia and Retinal Ciliopathies.Cold Spring Harbor perspectives in biology · 2017
    Review
  15. Article
  16. Article
  17. Occult macular dystrophy.Japanese journal of ophthalmology · 2015
    Review
  18. Article
  19. Article
  20. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

14 authors at 6 institutions in 2 countries.

Sara J BowneHuman Genetics Center, University of Texas Health Science Center at Houston, TX 77225, USA.
Stephen P Daiger
Kimberly A Malone
John R Heckenlively
Avril Kennan
Peter Humphries
Dianna Hughbanks-Wheaton
David G Birch
Qin Liu
Eric A Pierce
Jian Zuo
Qian Huang
Danyel D Donovan
Lori S Sullivan
Retina Foundation of the Southwest · USSt. Jude Children's Research Hospital · USThe University of Texas Health Science Center at Houston · USTrinity College Dublin · IECenter for Human Genetics · USUniversity of California, Los Angeles · US

Funding

DNA LINKAGE STUDIES OF DEGENERATIVE RETINAL DISEASESR01EY007142 · NEI · UNIVERSITY OF TEXAS HLTH SCI CTR HOUSTON · PI DAIGER, STEPHEN P · 1989 to 2017
$4.1M
RETINAL PATHOPHYSIOLOGY OF INFANTS AND ADULTSR01EY005235 · NEI · RETINA FOUNDATION OF THE SOUTHWEST · PI BIRCH, DAVID G · 1985 to 2005
$1.6M
MOUSE GENETICS OF RETINITIS PIGMENTOSA 1 (RP1)R01EY012950 · NEI · ST. JUDE CHILDREN'S RESEARCH HOSPITAL · PI ZUO, JIAN · 2001 to 2004
$1.0M
NEI NIH HHS EY07142NEI NIH HHS EY12950NEI NIH HHS EYO5235NEI NIH HHS R01 EY005235NEI NIH HHS R01 EY007142NEI NIH HHS R01 EY012950
6 · The paper itself

Abstract

purposeTo determine the full-length sequence of a gene with similarity to RP1 and to screen for mutations in this newly characterized gene, named retinitis pigmentosa 1-like 1(RP1L1). Since mutations in the RP1 gene cause autosomal dominant retinitis pigmentosa, it is possible that mutations in RP1's most sequence similar relative, RP1L1, may also be a cause of inherited retinal degeneration.

methodsA combination of cDNA clone sequencing, RACE, and database analysis were used to determine the RP1L1 mRNA sequence and its genomic organization. PCR analysis, semi-quantitative RT PCR, and in situ hybridization were used to determine the expression pattern of RP1L1. Single-strand conformational analysis and automated sequencing were used to screen probands from 60 adRP families for potential disease-causing mutations in RP1L1.

resultsThe human RP1L1 gene is encoded in 4 exons, which span 50 kb on chromosome 8p. The length of the RP1L1 mRNA is large, over 7 kb, but its exact length is variable between individuals due to the presence of several length polymorphisms, including a 48 bp repeat. RP1L1 encodes a protein with a minimal length of 2,400 amino acids and a predicted weight of 252 kDa. Expression of RP1L1 is limited to the retina and appears to be specific to photoreceptors. Mutational analysis of 60 autosomal dominant retinitis pigmentosa probands revealed the presence of 38 sequence substitutions in RP1L1. Over half of these substitutions result in alteration of the RP1L1 protein, but none of these substitutions appear to be pathogenic.

conclusionsThe RP1L1 gene encodes a large, highly polymorphic, retinal-specific protein. No RP1L1 disease-causing mutations were identified in any of the samples tested, making it unlikely that mutations in RP1L1 are a frequent cause of autosomal dominant retinitis pigmentosa. Additional experiments will be needed to determine if mutations in RP1L1 cause other forms of inherited retinal degeneration.

Indexed as

Amino Acid SequenceAnimalsBase SequenceChromosomes, Human, Pair 8DNA Mutational AnalysisElectrophoresis, Agar GelEye ProteinsGenes, DominantHumansIn Situ HybridizationMiceMicrotubule-Associated ProteinsMolecular Sequence DataMutationPolymorphism, Single-Stranded ConformationalRetinitis PigmentosaEye ProteinsMicrotubule-Associated ProteinsRNA, MessengerRP1L1 protein, humanRP1 protein, human

Identifiers

PMID12724644
PMCPMC2580755
OpenAlexW2156555211

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.