Choroideremia
diseaseOn this page
Also known as CHMprogressive choroidal atrophyprogressive tapetochoroidal dystrophyTapetochoroidal dystrophyTCD
Summary
Choroideremia (MONDO:0010557) is a disease caused by CHM (GenCC Definitive), with 5 cohort genes and 32 clinical trials. Top therapeutic interventions include simvastatin, vitamin a palmitate, and kio-301.
At a glance
- Prevalence: 1-9 / 100 000 (Europe) [Orphanet-validated]
- Causal gene: CHM (GenCC Definitive)
- Cohort genes: 5
- ClinVar variants: 181
- Phenotypes (HPO): 15
- Clinical trials: 32
Clinical features
Epidemiology
Prevalence records
1 prevalence record(s), Orphanet:
| Type | Class | Value | Geography | Validation |
|---|---|---|---|---|
| Point prevalence | 1-9 / 100 000 | 2 | Europe | Validated |
Signs & symptoms
Clinical features (HPO)
15 HPO clinical features (Orphanet curated; top 15 by frequency):
| HPO ID | Term | Frequency |
|---|---|---|
| HP:0000505 | Visual impairment | Very frequent (80-99%) |
| HP:0000512 | Abnormal electroretinogram | Very frequent (80-99%) |
| HP:0000545 | Myopia | Very frequent (80-99%) |
| HP:0000662 | Nyctalopia | Very frequent (80-99%) |
| HP:0007703 | Abnormality of retinal pigmentation | Very frequent (80-99%) |
| HP:0000529 | Progressive visual loss | Frequent (30-79%) |
| HP:0001133 | Constriction of peripheral visual field | Frequent (30-79%) |
| HP:0001139 | Choroideremia | Frequent (30-79%) |
| HP:0007994 | Peripheral visual field loss | Frequent (30-79%) |
| HP:0000533 | Chorioretinal atrophy | Occasional (5-29%) |
| HP:0000551 | Color vision defect | Occasional (5-29%) |
| HP:0007787 | Posterior subcapsular cataract | Occasional (5-29%) |
| HP:0011506 | Choroidal neovascularization | Occasional (5-29%) |
| HP:0030602 | Abnormal fundus autofluorescence imaging | Occasional (5-29%) |
| HP:0040049 | Macular edema | Occasional (5-29%) |
Identifiers
Disease identifiers
| Field | Value |
|---|---|
| Canonical name | choroideremia |
| Mondo ID | MONDO:0010557 |
| MeSH | D015794 |
| OMIM | 303100 |
| Orphanet | 180 |
| DOID | DOID:9821 |
| ICD-10-CM | H31.21 |
| ICD-11 | 217923263 |
| NCIT | C34469 |
| SNOMED CT | 75241009 |
| UMLS | C0008525 |
| MedGen | 944 |
| GARD | 0006061 |
| MedDRA | 10008791 |
| NORD | 932 |
| Is cancer (heuristic) | no |
Also known as: CHM · choroideremia · progressive choroidal atrophy · progressive tapetochoroidal dystrophy · Tapetochoroidal dystrophy · TCD
Data availability: 181 ClinVar variants · 4 GenCC gene-disease records · 28 cell lines.
Disease family
An umbrella term covering 2 Mondo subtypes.
Classification path: disease › human disease › disease by etiologic mechanism › disease of genetic or genomic mechanism › hereditary disease › X-linked disease › choroideremia
Related subtypes (49): X-linked Opitz G/BBB syndrome, X-linked immunoneurologic disorder, X-linked adrenal hypoplasia congenita, X-linked lissencephaly with abnormal genitalia, X-linked severe congenital neutropenia, X-linked distal spinal muscular atrophy type 3, epilepsy, X-linked 1, with variable learning disabilities and behavior disorders, Aland island eye disease, X-linked erythropoietic protoporphyria, X-linked central congenital hypothyroidism with late-onset testicular enlargement, X-linked colobomatous microphthalmia-microcephaly-intellectual disability-short stature syndrome, X-linked acrogigantism due to Xq26 microduplication, Wiskott-Aldrich syndrome, X-linked Alport syndrome, X-linked mandibulofacial dysostosis, X-linked chondrodysplasia punctata, cone dystrophy, X-linked, with tapetal-like sheen, diabetes insipidus, nephrogenic, X-linked, Dyggve-Melchior-Clausen syndrome, X-linked, dyskeratosis congenita, X-linked, X-linked hypohidrotic ectodermal dysplasia, X-linked Ehlers-Danlos syndrome, epidermodysplasia verruciformis, X-linked, exudative vitreoretinopathy 2, X-linked, Aarskog-Scott syndrome, X-linked, hemophilia A, X-linked hydrocephalus with stenosis of the aqueduct of Sylvius, hyper-IgM syndrome type 1, X-linked lymphoproliferative syndrome, macular dystrophy, X-linked, X-linked Emery-Dreifuss muscular dystrophy, X-linked myotubular myopathy, X-linked lethal multiple pterygium syndrome, X-linked retinoschisis, spondyloepiphyseal dysplasia tarda, X-linked, X-linked cerebellar ataxia, adrenoleukodystrophy, Charcot-Marie-Tooth disease type X, X-linked dominant disease, X-linked recessive disease, X-linked hypophosphatemic rickets, X-linked sideroblastic anemia 1, X-linked deafness, X-linked cone-rod dystrophy, X-linked congenital stationary night blindness, X-linked congenital hemolytic anemia, X-linked complex neurodevelopmental disorder, X-linked intellectual disability, leukemia, acute, X-linked
Subtypes (2): total central choroidal atrophy, choroideremia hypopituitarism
Genetics & variants
GWAS landscape
No GWAS associations recorded — common-variant (GWAS) studies don’t cover this disease (typical for Mendelian / rare diseases). See the curated gene cohort and Mendelian overlap below.
Variant details and genetic-evidence tiers
ClinVar germline variants
181 retrieved; paginated sample, class counts are floors:
62 pathogenic, 45 uncertain significance, 23 likely pathogenic, 18 benign, 13 likely benign, 9 pathogenic/likely pathogenic, 7 conflicting classifications of pathogenicity, 3 benign/likely benign, 1 not provided
| ClinVar | Variant (HGVS) | Gene | Classification | Review |
|---|---|---|---|---|
| 1069387 | NM_000390.4(CHM):c.49+3A>G | CHM | Pathogenic/Likely pathogenic | criteria provided, multiple submitters, no conflicts |
| 1073117 | NM_000390.4(CHM):c.1663A>T (p.Arg555Ter) | CHM | Pathogenic | criteria provided, multiple submitters, no conflicts |
| 1073806 | NM_000390.4(CHM):c.224G>A (p.Trp75Ter) | CHM | Pathogenic | criteria provided, multiple submitters, no conflicts |
| 1075553 | NM_000390.4(CHM):c.1166+1G>C | CHM | Pathogenic | criteria provided, multiple submitters, no conflicts |
| 11148 | NM_000390.4(CHM):c.1358_1359delinsGA (p.Ser453Ter) | CHM | Pathogenic | no assertion criteria provided |
| 11149 | NM_000390.4(CHM):c.1484C>A (p.Ser495Ter) | CHM | Pathogenic | criteria provided, multiple submitters, no conflicts |
| 11150 | NM_000390.4(CHM):c.1471G>T (p.Glu491Ter) | CHM | Pathogenic | no assertion criteria provided |
| 11152 | NM_000390.4(CHM):c.1584_1587del (p.Val529fs) | CHM | Pathogenic | criteria provided, multiple submitters, no conflicts |
| 11153 | NM_000390.4(CHM):c.1497C>A (p.Cys499Ter) | CHM | Pathogenic | criteria provided, single submitter |
| 11154 | NM_000390.4(CHM):c.877C>T (p.Arg293Ter) | CHM | Pathogenic | criteria provided, multiple submitters, no conflicts |
| 11156 | NG_009874.2:g.93620_93621insLINE1invCTAATTGATCTTCT | CHM | Pathogenic | no assertion criteria provided |
| 1178351 | NM_000390.4(CHM):c.232C>T (p.Gln78Ter) | CHM | Pathogenic | criteria provided, single submitter |
| 1213973 | NM_000390.4(CHM):c.856C>T (p.Gln286Ter) | CHM | Pathogenic | criteria provided, multiple submitters, no conflicts |
| 1213974 | NM_000390.4(CHM):c.1066A>T (p.Lys356Ter) | CHM | Pathogenic | criteria provided, multiple submitters, no conflicts |
| 1330296 | NM_000390.4(CHM):c.703-2A>G | CHM | Pathogenic | criteria provided, single submitter |
| 1330298 | NM_000390.4(CHM):c.846dup (p.Asn283Ter) | CHM | Pathogenic | criteria provided, multiple submitters, no conflicts |
| 1380902 | NM_000390.4(CHM):c.1695T>G (p.Tyr565Ter) | CHM | Pathogenic | criteria provided, multiple submitters, no conflicts |
| 143078 | NM_000390.4(CHM):c.808C>T (p.Arg270Ter) | CHM | Pathogenic | criteria provided, multiple submitters, no conflicts |
| 1454540 | NM_000390.4(CHM):c.979C>T (p.Gln327Ter) | CHM | Pathogenic | criteria provided, multiple submitters, no conflicts |
| 1675198 | NM_000390.4(CHM):c.187C>T (p.Gln63Ter) | CHM | Pathogenic | criteria provided, multiple submitters, no conflicts |
| 1685630 | NM_000390.4(CHM):c.1350-1G>A | CHM | Pathogenic/Likely pathogenic | criteria provided, multiple submitters, no conflicts |
| 1685631 | NM_000390.4(CHM):c.961del (p.Tyr321fs) | CHM | Pathogenic | criteria provided, multiple submitters, no conflicts |
| 1685632 | NM_000390.4(CHM):c.437T>G (p.Leu146Ter) | CHM | Pathogenic | criteria provided, multiple submitters, no conflicts |
| 1691447 | NM_000390.4(CHM):c.368_390dup (p.Thr131delinsLeuLeuTer) | CHM | Pathogenic | no assertion criteria provided |
| 1703520 | NM_000390.4(CHM):c.1402del (p.Ser468fs) | CHM | Pathogenic/Likely pathogenic | criteria provided, multiple submitters, no conflicts |
| 1725706 | NM_000390.4(CHM):c.1186G>T (p.Gly396Ter) | CHM | Pathogenic/Likely pathogenic | criteria provided, multiple submitters, no conflicts |
| 1805107 | NM_000390.4(CHM):c.751_752del (p.Asn250_Val251insTer) | CHM | Pathogenic | criteria provided, single submitter |
| 1806322 | NM_000390.4(CHM):c.999_1000insT (p.Gln334fs) | CHM | Pathogenic | criteria provided, single submitter |
| 1806365 | NM_000390.4(CHM):c.941-1G>A | CHM | Pathogenic | criteria provided, multiple submitters, no conflicts |
| 189189 | NM_000390.4(CHM):c.116+1G>A | CHM | Pathogenic/Likely pathogenic | criteria provided, multiple submitters, no conflicts |
Genes & proteins
Mendelian disease overlap and somatic drivers
GenCC: 4 · Orphanet: 15 · OMIM-shared: 0 · Dual-evidence (GWAS+Mendelian): 0
GenCC gene–disease validity (cohort genes)
the Disease column is the GenCC-asserted condition — a cohort gene’s strongest validity may be for a related predisposition syndrome.
| Gene | Classification | Inheritance | Disease | Records |
|---|---|---|---|---|
| CHM | Definitive | X-linked | choroideremia | 4 |
Orphanet rare-disease linkage (cohort genes)
| Gene | Orphanet ID | Rare disease |
|---|---|---|
| CHM | Orphanet:180 | Choroideremia |
| PRPF8 | Orphanet:528084 | Non-specific syndromic intellectual disability |
| PRPF8 | Orphanet:791 | Retinitis pigmentosa |
| TOPORS | Orphanet:2754 | Orofaciodigital syndrome type 6 |
| TOPORS | Orphanet:791 | Retinitis pigmentosa |
| CYP4V2 | Orphanet:41751 | Bietti crystalline dystrophy |
| PRPH2 | Orphanet:1872 | Cone rod dystrophy |
| PRPH2 | Orphanet:227796 | Fundus albipunctatus |
| PRPH2 | Orphanet:52427 | Retinitis punctata albescens |
| PRPH2 | Orphanet:75377 | Central areolar choroidal dystrophy |
| PRPH2 | Orphanet:791 | Retinitis pigmentosa |
| PRPH2 | Orphanet:827 | Stargardt disease |
| PRPH2 | Orphanet:99000 | Adult-onset foveomacular vitelliform dystrophy |
| PRPH2 | Orphanet:99001 | Butterfly-shaped pigment dystrophy |
| PRPH2 | Orphanet:99003 | Multifocal pattern dystrophy simulating fundus flavimaculatus |
Cohort genes → proteins
5 cohort genes, 5 distinct canonical proteins.
Evidence partition
| Subset | Genes |
|---|---|
| multi_evidence | 5 |
Cohort genes (full)
| Symbol | HGNC | Ensembl | UniProt | Name | Evidence |
|---|---|---|---|---|---|
| CHM | HGNC:1940 | ENSG00000188419 | P24386 | Rab proteins geranylgeranyltransferase component A 1 | gencc,clinvar |
| PRPF8 | HGNC:17340 | ENSG00000174231 | Q6P2Q9 | Pre-mRNA-processing-splicing factor 8 | clinvar |
| TOPORS | HGNC:21653 | ENSG00000197579 | Q9NS56 | E3 ubiquitin-protein ligase Topors | clinvar |
| CYP4V2 | HGNC:23198 | ENSG00000145476 | Q6ZWL3 | Cytochrome P450 4V2 | clinvar |
| PRPH2 | HGNC:9942 | ENSG00000112619 | P23942 | Peripherin-2 | clinvar |
Cohort function summary
Lead sentence per gene, UniProt-curated.
| Symbol | Protein name | Function (lead sentence) |
|---|---|---|
| CHM | Rab proteins geranylgeranyltransferase component A 1 | Substrate-binding subunit of the Rab geranylgeranyltransferase (GGTase) complex. |
| PRPF8 | Pre-mRNA-processing-splicing factor 8 | Plays a role in pre-mRNA splicing as core component of precatalytic, catalytic and postcatalytic spliceosomal complexes, both of the predominant U2-type spliceosome and the minor U12-type spliceosome. |
| TOPORS | E3 ubiquitin-protein ligase Topors | Functions as an E3 ubiquitin-protein ligase and as an E3 SUMO1-protein ligase. |
| CYP4V2 | Cytochrome P450 4V2 | A cytochrome P450 monooxygenase involved in fatty acid metabolism in the eye. |
| PRPH2 | Peripherin-2 | Essential for retina photoreceptor outer segment disk morphogenesis, may also play a role with ROM1 in the maintenance of outer segment disk structure. |
Protein-family classification
Druggable: 2 · Difficult: 1 · Unknown: 2 · Druggable fraction: 0.4
Family distribution
Cohort families vs a genome-wide background (hypergeometric, BH-FDR; fold = observed/expected). Counts kept; sorted by enrichment, so the catch-all Other/Unknown bucket no longer leads.
| Family | Genes | Fold | FDR |
|---|---|---|---|
| Enzyme (other) | 2 | 4.8× | 0.176 |
| Transcription factor | 1 | 1.6× | 0.713 |
| Other/Unknown | 2 | 0.7× | 0.877 |
Per-gene assignment
| Symbol | Family | Druggable? | EC | InterPro (top 3) |
|---|---|---|---|---|
| CHM | Enzyme (other) | yes | 2.5.1.60 | Rab_escort, GDP_dissociation_inhibitor, FAD/NAD-bd_sf |
| PRPF8 | Other/Unknown | no | JAMM/MPN+_dom, RNaseH-like_sf, PRO8NT | |
| TOPORS | Transcription factor | no | Znf_RING, Znf_RING/FYVE/PHD, Znf_RING_CS | |
| CYP4V2 | Enzyme (other) | yes | 1.14.14.79 | Cyt_P450, Cyt_P450_E_grp-I, Cyt_P450_CS |
| PRPH2 | Other/Unknown | no | Peripherin/rom-1, Tetraspanin_EC2_sf, Peripherin/rom-1_CS |
Expression context
Cohort genes with no expression data: 0.
5 cohort genes are a single-cell marker in ≥1 SCXA experiment.
Breadth distribution (Bgee present_calls)
| Bucket | Genes |
|---|---|
| narrow (1-5 tissues) | 0 |
| moderate (6-20) | 0 |
| broad (>20) | 5 |
| unknown | 0 |
Top tissues across cohort
| Tissue | Cohort genes |
|---|---|
| Brodmann (1909) area 23 | 1 |
| endothelial cell | 1 |
| middle temporal gyrus | 1 |
| adenohypophysis | 1 |
| pituitary gland | 1 |
| ventricular zone | 1 |
| calcaneal tendon | 1 |
| secondary oocyte | 1 |
| sperm | 1 |
| ileal mucosa | 1 |
| kidney epithelium | 1 |
| liver | 1 |
| hindlimb stylopod muscle | 1 |
| quadriceps femoris | 1 |
| vastus lateralis | 1 |
Per-gene tissue summary (top 30)
| Symbol | Bgee breadth | FANTOM5 breadth | SCXA | Top tissues |
|---|---|---|---|---|
| CHM | 264 | ubiquitous | marker | endothelial cell, Brodmann (1909) area 23, middle temporal gyrus |
| PRPF8 | 145 | ubiquitous | marker | adenohypophysis, pituitary gland, ventricular zone |
| TOPORS | 285 | ubiquitous | marker | secondary oocyte, calcaneal tendon, sperm |
| CYP4V2 | 254 | ubiquitous | marker | kidney epithelium, ileal mucosa, liver |
| PRPH2 | 176 | tissue_specific | marker | quadriceps femoris, vastus lateralis, hindlimb stylopod muscle |
Protein interactions among cohort
Intra-cohort edges: 2.
Hub genes (top 10 by interactor count)
| Symbol | Interactor count |
|---|---|
| PRPF8 | 5,582 |
| CYP4V2 | 1,867 |
| TOPORS | 1,552 |
| CHM | 1,445 |
| PRPH2 | 1,234 |
Intra-cohort edges
| A | B | Sources |
|---|---|---|
| PRPF8 | TOPORS | string_interaction |
| PRPH2 | TOPORS | string_interaction |
Structural data
PDB: 2 · AlphaFold-only: 3 · No structure: 0
Cohort genes with PDB structures (top 30)
| Symbol | UniProt | PDB entries |
|---|---|---|
| PRPF8 | Q6P2Q9 | 101 |
| PRPH2 | P23942 | 1 |
AlphaFold-only cohort genes (top 30 by pLDDT)
| Symbol | UniProt | pLDDT |
|---|---|---|
| CYP4V2 | Q6ZWL3 | 91.05 |
| CHM | P24386 | 81.05 |
| TOPORS | Q9NS56 | 49.39 |
Function
Pathway analysis
Distinct Reactome pathways touched by cohort: 11. Enrichment computed across 5 evidence-associated genes (4 with Reactome annotation).
Pathways by enrichment
Over-representation of cohort genes vs the genome-wide background (hypergeometric test, Benjamini-Hochberg FDR; fold = observed/expected over 4 annotated cohort genes). Counts and members are kept as ground-truth; sorted by enrichment.
| Pathway | Cohort genes | Fold | FDR | Sample cohort genes |
|---|---|---|---|---|
| SUMOylation of immune response proteins | 1 | 237.9× | 0.027 | TOPORS |
| TP53 regulates transcription of several additional cell death genes whose specific roles in p53-dependent apoptosis remain uncertain | 1 | 190.3× | 0.027 | CHM |
| The canonical retinoid cycle in rods (twilight vision) | 1 | 129.8× | 0.027 | CYP4V2 |
| Endogenous sterols | 1 | 98.5× | 0.027 | CYP4V2 |
| SUMOylation of SUMOylation proteins | 1 | 81.6× | 0.027 | TOPORS |
| SUMOylation of transcription cofactors | 1 | 60.7× | 0.028 | TOPORS |
| mRNA Splicing - Minor Pathway | 1 | 56.0× | 0.028 | PRPF8 |
| RAB geranylgeranylation | 1 | 43.3× | 0.032 | CHM |
| RAB GEFs exchange GTP for GDP on RABs | 1 | 31.0× | 0.039 | CHM |
| mRNA Splicing - Major Pathway | 1 | 13.7× | 0.078 | PRPF8 |
| Dengue Virus-Host Interactions | 1 | 11.4× | 0.085 | PRPF8 |
GO biological processes by enrichment
Over-representation of cohort genes vs the genome-wide background (hypergeometric test, Benjamini-Hochberg FDR; fold = observed/expected over 5 annotated cohort genes). Counts and members are kept as ground-truth; sorted by enrichment.
| GO term | Cohort genes | Fold | FDR | Sample cohort genes |
|---|---|---|---|---|
| photoreceptor cell outer segment organization | 2 | 421.3× | 3e-04 | TOPORS, PRPH2 |
| visual perception | 3 | 47.7× | 4e-04 | CHM, CYP4V2, PRPH2 |
| response to low light intensity stimulus | 1 | 3370.4× | 0.004 | PRPH2 |
| fatty acid omega-oxidation | 1 | 561.7× | 0.015 | CYP4V2 |
| protein geranylgeranylation | 1 | 561.7× | 0.015 | CHM |
| spliceosomal tri-snRNP complex assembly | 1 | 224.7× | 0.024 | PRPF8 |
| maintenance of protein location in nucleus | 1 | 224.7× | 0.024 | TOPORS |
| protein heterooligomerization | 1 | 210.7× | 0.024 | PRPH2 |
| sterol metabolic process | 1 | 168.5× | 0.027 | CYP4V2 |
| retina layer formation | 1 | 129.6× | 0.027 | TOPORS |
| detection of light stimulus involved in visual perception | 1 | 129.6× | 0.027 | PRPH2 |
| RNA splicing, via transesterification reactions | 1 | 124.8× | 0.027 | PRPF8 |
| retinoid metabolic process | 1 | 99.1× | 0.029 | CYP4V2 |
| intrinsic apoptotic signaling pathway in response to DNA damage by p53 class mediator | 1 | 99.1× | 0.029 | TOPORS |
| protein localization to nucleus | 1 | 70.2× | 0.035 | TOPORS |
| protein monoubiquitination | 1 | 68.8× | 0.035 | TOPORS |
| intrinsic apoptotic signaling pathway in response to DNA damage | 1 | 64.8× | 0.035 | TOPORS |
| protein sumoylation | 1 | 64.8× | 0.035 | TOPORS |
| protein targeting to membrane | 1 | 59.1× | 0.036 | CHM |
| retina development in camera-type eye | 1 | 51.1× | 0.040 | PRPH2 |
| DNA-templated transcription | 1 | 44.9× | 0.043 | TOPORS |
| small GTPase-mediated signal transduction | 1 | 36.6× | 0.050 | CHM |
| protein K48-linked ubiquitination | 1 | 33.7× | 0.050 | TOPORS |
| protein maturation | 1 | 32.7× | 0.050 | PRPH2 |
| cellular response to tumor necrosis factor | 1 | 32.7× | 0.050 | PRPF8 |
| protein homooligomerization | 1 | 24.4× | 0.062 | PRPH2 |
| protein polyubiquitination | 1 | 23.1× | 0.062 | TOPORS |
| regulation of cell population proliferation | 1 | 23.1× | 0.062 | TOPORS |
| protein localization to plasma membrane | 1 | 21.7× | 0.064 | PRPH2 |
| cellular response to lipopolysaccharide | 1 | 19.6× | 0.067 | PRPF8 |
Therapeutics
Drugs indicated for this disease
0 approved, 1 in late-stage (phase 3) trials. Disease-direct ChEMBL indications, not inferred from the associated-gene cohort below.
| Drug | Development status |
|---|---|
| Timrepigene Emparvovec | Phase 3 (in late-stage trials) |
Drug target analysis
Approved (phase 4): 0 · Phase ≥3: 0 · Phased (≥1): 1 · Undrugged: 4
Druggability breadth: 2 of 5 evidence-associated genes (40%) have a ChEMBL target (buckets above are over the deeply-mined display cohort).
Top cohort targets by molecule count
| Symbol | Molecules | Max phase |
|---|---|---|
| PRPF8 | 1 | 2 |
| CHM | 0 | 0 |
| TOPORS | 0 | 0 |
| CYP4V2 | 0 | 0 |
| PRPH2 | 0 | 0 |
Drugs targeting cohort genes (top 30)
| Molecule | Max phase | Targets in cohort |
|---|---|---|
| MOLIBRESIB | 2 | PRPF8 |
Bioactivity and enzyme data
Enzyme cohort genes (≥1 EC): 2.
Cohort genes with ChEMBL bioactivity (full, sorted by assay count)
| Symbol | Assays | Type breakdown |
|---|---|---|
| PRPF8 | 8 | Binding:8 |
| CHM | 1 | Binding:1 |
Cohort enzymes (BRENDA EC)
| Symbol | EC numbers | Names |
|---|---|---|
| CHM | 2.5.1.60 | protein geranylgeranyltransferase type II |
| CYP4V2 | 1.14.14.79 | docosahexaenoic acid omega-hydroxylase |
Pharmacogenomics
Cohort genes with a PharmGKB record: 5; with CPIC/DPWG dosing guidelines: 0.
No cohort gene has a CPIC/DPWG genotype-guided dosing guideline (PharmGKB).
Chemical tractability of cohort targets
1 approved/phased compounds have measured bioactivity against a cohort gene (and aren’t yet in disease-level trials). This is a research / tractability signal, NOT a therapeutic recommendation — a bioactivity row often reflects off-target or screening binding (e.g. promiscuous kinase inhibitors against a cohort kinase), implying no disease mechanism.
| Compound | Max phase | Cohort target (bioactivity) |
|---|---|---|
| MOLIBRESIB | 2 | PRPF8 |
Druggability pyramid
Cohort genes binned by druggability tier (high → low):
| Tier | Definition | Genes | Symbols |
|---|---|---|---|
| A | Approved (phase 4 drug) | 0 | |
| B | Phased (≥1) drug, not yet approved | 1 | PRPF8 |
| C | Druggable family + PDB, no drug | 0 | |
| D | Druggable family + AlphaFold only, no drug | 2 | CHM, CYP4V2 |
| E | Difficult family or no structure, no drug | 2 | TOPORS, PRPH2 |
Undrugged target profiles
4 cohort genes are undrugged. Ranked by ‘starting-point quality’ (assay depth + drugged-partner adjacency).
| Symbol | ChEMBL assays | Drugged partners (top 3) |
|---|---|---|
| CHM | 1 | — |
| TOPORS | 0 | — |
| CYP4V2 | 0 | — |
| PRPH2 | 0 | — |
Clinical trials & evidence
Clinical trials
Clinical trials: 32.
Phase distribution (across all retrieved trials)
| Phase | Trials |
|---|---|
| Not specified | 19 |
| PHASE1/PHASE2 | 5 |
| PHASE2 | 4 |
| PHASE3 | 2 |
| PHASE1 | 2 |
Top trials by phase / activity
| NCT | Phase | Status | Title |
|---|---|---|---|
| NCT03584165 | PHASE3 | ENROLLING_BY_INVITATION | Long-term Safety and Efficacy Follow-up of BIIB111 for the Treatment of Choroideremia and BIIB112 for the Treatment of X-Linked Retinitis Pigmentosa |
| NCT03496012 | PHASE3 | COMPLETED | Efficacy and Safety of BIIB111 for the Treatment of Choroideremia |
| NCT01461213 | PHASE1/PHASE2 | COMPLETED | Gene Therapy for Blindness Caused by Choroideremia |
| NCT01654562 | PHASE1/PHASE2 | TERMINATED | The Short-term Effects of Simvastatin on the Vision of Males Affected by Choroideremia |
| NCT02077361 | PHASE1/PHASE2 | COMPLETED | An Open Label Clinical Trial of Retinal Gene Therapy for Choroideremia |
| NCT02341807 | PHASE1/PHASE2 | COMPLETED | Safety and Dose-escalation Study of AAV2-hCHM in Participants With CHM (Choroideremia) Gene Mutations |
| NCT02407678 | PHASE2 | COMPLETED | REP1 Gene Replacement Therapy for Choroideremia |
| NCT02553135 | PHASE2 | COMPLETED | Choroideremia Gene Therapy Clinical Trial |
| NCT02671539 | PHASE2 | COMPLETED | THOR - Tübingen Choroideremia Gene Therapy Trial |
| NCT03507686 | PHASE2 | COMPLETED | A Safety Study of Retinal Gene Therapy for Choroideremia With Administration of BIIB111 |
| NCT05282953 | PHASE1/PHASE2 | COMPLETED | A Phase I/II Dose-escalating Study of the Safety, Tolerability and Efficacy of KIO-301 Administered Intravitreally to Patients With Retinitis Pigmentosa and Choroideremia (ABACUS) |
| NCT04483440 | PHASE1 | ACTIVE_NOT_RECRUITING | Dose Escalation Study of Intravitreal 4D-110 in Patients With Choroideremia |
| NCT06460844 | PHASE1 | ACTIVE_NOT_RECRUITING | Study to Evaluate Safety of RTx-015 Injection in Retinitis Pigmentosa or Choroideremia Patients (ENVISION) |
| NCT01866371 | Not specified | RECRUITING | High Resolution Retinal Imaging |
| NCT02435940 | Not specified | RECRUITING | Inherited Retinal Degenerative Disease Registry |
| NCT05158049 | Not specified | ENROLLING_BY_INVITATION | Longitudinal Study of a Bionic Eye |
| NCT06375239 | Not specified | RECRUITING | Observational Study to Assess Endpoint Operational Feasibility & Measurement Properties in Patients with Retinal Degeneration |
| NCT06642532 | Not specified | RECRUITING | A Prospective Observational Study of Transcranial Doppler Ultrasound in the Assessment of Cerebral Blood Flow After Polyetheretherketone Cranioplasty |
| NCT00427180 | Not specified | UNKNOWN | IRIS PILOT - Extended Pilot Study With a Retinal Implant System |
| NCT01603576 | Not specified | COMPLETED | Pilot Study of a Suprachoroidal Retinal Prosthesis |
| NCT01864486 | Not specified | COMPLETED | Restoring Vision With the Intelligent Retinal Implant System (IRIS V1)in Patients With Retinal Dystrophy |
| NCT02670980 | Not specified | COMPLETED | Compensation for Blindness With the Intelligent Retinal Implant System (IRIS V2) in Patients With Retinal Dystrophy |
| NCT02994368 | Not specified | TERMINATED | Natural History Study of Choroideremia |
| NCT03359551 | Not specified | COMPLETED | Natural History of the Progression of Choroideremia Study |
| NCT03406416 | Not specified | COMPLETED | Study of a Suprachoroidal Retinal Prosthesis |
| NCT04750785 | Not specified | COMPLETED | A Study to Assess Choroideremia (CHM) Health Outcomes |
| NCT04795206 | Not specified | COMPLETED | Natural Disease Progression in Participants With Choroideremia |
| NCT05045703 | Not specified | WITHDRAWN | The Dark-Adapted Retinal Function Response in Choroideremia (DARC) Study |
| NCT05134493 | Not specified | COMPLETED | Embolic Signals Detection Study (Esds) in Candidates for Surgical Carotid Revascularisation |
| NCT05258032 | Not specified | UNKNOWN | Structural and Functional Characterization of Rare Ocular Diseases |
| NCT05829200 | Not specified | WITHDRAWN | Transcranial Doppler(TCD) Evaluation of High Intensity Transient Signals and Carotid Disease |
| NCT05903443 | Not specified | COMPLETED | Research on the Brain Death Determination in China |
Drugs tested across these trials (top 30)
| Molecule | Max phase | Trials referencing |
|---|---|---|
| SIMVASTATIN | 4 | 1 |
| VITAMIN A PALMITATE | 4 | 1 |
| KIO-301 | 1 | 1 |
Related Atlas pages
- Cohort genes: CHM, PRPF8, TOPORS, CYP4V2, PRPH2
- Drugs: Simvastatin, Vitamin A Palmitate