RPSA ribosomal protein SA
ENSG00000168028 · protein coding · Open Targets profile
Required for the assembly and/or stability of the 40S ribosomal subunit. Required for the processing of the 20S rRNA- precursor to mature 18S rRNA in a late step of the maturation of 40S ribosomal subunits. Also functions as a cell surface receptor for laminin. Plays a role in cell adhesion to the basement membrane and in the consequent activation of signaling transduction pathways. May play a role in cell fate determination and tissue morphogenesis. Acts as a PPP1R16B-dependent substrate of PPP1CA. {ECO:0000255|HAMAP- Rule:MF_03016, ECO:0000269|PubMed:16263087, ECO:0000269|PubMed:6300843}.
Each band is a group of drugs. It runs from the kind of drug on the left to the furthest stage that drug has reached in any disease on the right. Thicker bands mean more drugs.
Approved bands are highlighted. Withdrawn means the drug was pulled from the market or from development. A combined phase counts as the later one (Phase 1/2 is shown as Phase 2). Hover a band for the drug names. Source: Open Targets Platform, fetched live.
Each row is a cancer, strongest overall evidence first. The two dots show how strong the inherited (germline) and tumour-mutation (somatic) evidence is; the line between them is the gap.
Scores run from 0 (no evidence) to 1 (strongest). A missing dot at 0 means Open Targets holds no evidence of that kind. Source: Open Targets Platform, fetched live.
Tractability
- Small molecule
- Approved Drug, Structure with Ligand, High-Quality Ligand
- Antibody
- GO CC high conf, UniProt loc med conf, Human Protein Atlas loc
- PROTAC
- UniProt Ubiquitination, Database Ubiquitination, Half-life Data, Small Molecule Binder
- Other modalities
- Advanced Clinical
gnomAD loss of function constraint: o/e – (upper bound –). Low values mean loss of function is poorly tolerated, a safety flag for inhibition.
Who runs trials of these drugs
No named investigators on registry trials of RPSA's approved or late-stage drugs in the last three years.
Registry trials of MT-3724, ELX-02, zolimomab aritox updated in the last three years, counted by the country group of their listed sites. A trial with sites in several groups counts in each; 0 of 1 have all sites in one country.
Site counts are not patients per country, and trials registered only outside ClinicalTrials.gov are not covered. Where sites are is a fact about the record, not a judgement of its quality. Europe is the EU and EEA, the UK and Switzerland. Source: ClinicalTrials.gov, fetched live.
6 trials of drugs against RPSA were stopped early
Terminated, withdrawn and suspended interventional trials of MT-3724, ELX-02, zolimomab aritox, citatuzumab bogatox, newest update first, live from ClinicalTrials.gov. Each reason is quoted exactly as the registry gives it; we do not sort reasons into safety, efficacy or business. Dates are the last registry update. Showing the 6 most recent of 6.
- terminated · 2022-08-18 · Molecular Templates, Inc. · MT-3724 Phase 1, MT-3724 Phase 2“Sponsor decision following clinical hold”
- terminated · 2022-08-16 · Molecular Templates, Inc. · MT-3724“Sponsor decision”
- terminated · 2022-08-16 · Molecular Templates, Inc. · MT-3724“Sponsor decision”
- terminated · 2020-05-27 · Eloxx Pharmaceuticals, Inc. · ELX-02“Due to study design limitations, this study has been discontinued and will not proceed with the 2nd cohort as contemplated in the original protocol.”
- terminated · 2019-10-22 · Eloxx Pharmaceuticals, Inc. · ELX-02“Transferred study to Antwerp, Belgium”
- withdrawn · 2016-03-02 · Molecular Templates, Inc. · MT-3724“The patient population (CLL \& SLL) was included in another ongoing study involving NHL patients.”
Paediatric incentives and obligations for RPSA's drugs
For MT-3724, ELX-02, zolimomab aritox, citatuzumab bogatox: what EMA and FDA publish about paediatric plans, orphan status and pediatric approvals, and how many registered studies take children. Each line is a yes, no or not published fact from the record linked under it; none of it is a forecast.
- FDA pediatric target list: no · RPSA is not on the listRule: Target is on FDA's Pediatric Molecular Target List (relevant targets). Source: FDA Pediatric Molecular Target List (Listed as February 2026 on the FDA Pediatric Oncology page; the file served is 9.7.22_the_relevant_molecular_target_list.xlsx, whose Summary of Changes sheet is headed 'SEPTEMBER 2022 UPDATE' (footnote date 2022-09-01)), 2026-11-11
- EU paediatric investigation plan: no · No EMA paediatric investigation plan decision names mt-3724, elx-02, zolimomab aritox, citatuzumab bogatoxRule: An EMA PIP decision (agreement, modification or waiver) lists the drug as its active substance, exact name. Source: EMA data download (dated snapshot), 2026-11-11
- EU orphan designation: no · No EU orphan designation names mt-3724, elx-02, zolimomab aritox, citatuzumab bogatoxRule: An EU orphan designation lists the drug as its active substance (exact name) or belongs to a medicine that does; withdrawn and expired designations are listed with their status. Source: EMA data download (dated snapshot), 2026-11-11
- Authorised in the EU: no · EMA lists no centrally authorised medicine of mt-3724, elx-02, zolimomab aritox, citatuzumab bogatoxRule: An EMA medicine record lists the drug as its active substance or INN, exact name; national-only authorisations are not in this file. Source: EMA data download (dated snapshot), 2026-11-11
- FDA orphan designation: not published · FDA's orphan designation database turns away automated requests, so this app does not read it; search it by hand at the linkRule: Would be: an FDA orphan designation names the drug. Source: FDA orphan designations search
- FDA pediatric oncology approval: no · FDA's table lists no pediatric approval of mt-3724, elx-02, zolimomab aritox, citatuzumab bogatoxRule: FDA's Pediatric Oncology Drug Approvals table names the drug. Source: FDA Pediatric Oncology Drug Approvals (content current as of 2026-03-03), 2026-11-12
- Registered studies open to children: yes · 3 interventional studies of mt-3724, elx-02, zolimomab aritox, citatuzumab bogatox include patients under 18; 0 are recruiting, not yet recruiting or activeRule: The registry's age group includes Child (birth to 17 years), which also counts studies that set no minimum age. Source: ClinicalTrials.gov search, 2026-11-12
Rare pediatric disease voucher. FDA, content current as of 29 Apr 2026: “As of February 3, 2026, enactment of the Consolidated Appropriations Act, 2026, the rare pediatric disease PRV program will sunset after September 30, 2029. FDA may not award any PRVs under this program after September 30, 2029.” Voucher sale prices are not shown here; they appear only as company-reported news. FDA: Rare Pediatric Disease Designation and Priority Review Voucher Programs
All 5 drugs and clinical candidates as a table
Each drug, stage and indication links to its Open Targets record, where the trials and approvals behind it are listed. Salt forms (for example a mesylate) are listed as Open Targets records them, as separate entries.
| Drug | Type | Highest stage | Indications | Source records |
|---|---|---|---|---|
| MT-3724 | Unknown | phase 2 | diffuse large B-cell lymphoma, non-Hodgkin lymphoma, B-cell non-Hodgkin lymphoma, B-cell chronic lymphocytic leukemia, lymphoid leukemia | Open Targets · ChEMBL |
| ELX-02 | Unknown | phase 2 | cystic fibrosis, nephropathic cystinosis, Alport syndrome | Open Targets · ChEMBL |
| ZOLIMOMAB ARITOX | Antibody drug conjugate | phase 2 | arthritic joint disease | Open Targets · ChEMBL |
| CITATUZUMAB BOGATOX | Antibody drug conjugate | phase 1 | – | Open Targets · ChEMBL |
| ATALUREN | Small molecule | withdrawal | Duchenne muscular dystrophy, cystic fibrosis, neuromuscular disease caused by qualitative or quantitative defects of dystrophin, Becker muscular dystrophy, Dravet syndrome, muscular dystrophy, hemophilia B, hemophilia A, +5 more | Open Targets · ChEMBL |