CDK12 cyclin dependent kinase 12
ENSG00000167258 · protein coding · Open Targets profile
Cyclin-dependent kinase that phosphorylates the C-terminal domain (CTD) of the large subunit of RNA polymerase II (POLR2A), thereby acting as a key regulator of transcription elongation. Regulates the expression of genes involved in DNA repair and is required for the maintenance of genomic stability. Preferentially phosphorylates 'Ser-5' in CTD repeats that are already phosphorylated at 'Ser-7', but can also phosphorylate 'Ser-2'. Required for RNA splicing, possibly by phosphorylating SRSF1/SF2. Involved in regulation of MAP kinase activity, possibly leading to affect the response to estrogen inhibitors. {ECO:0000269|PubMed:11683387, ECO:0000269|PubMed:19651820, ECO:0000269|PubMed:20952539, ECO:0000269|PubMed:22012619, ECO:0000269|PubMed:24662513}.
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 Withdrawn means the drug was pulled from the market or from development.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
- Advanced Clinical, Structure with Ligand, High-Quality Ligand, Druggable Family
- PROTAC
- Literature, UniProt Ubiquitination, Database Ubiquitination, Half-life Data, Small Molecule Binder
gnomAD loss of function constraint: o/e 0.12701000273227692 (upper bound 0.19051000475883484). Low values mean loss of function is poorly tolerated, a safety flag for inhibition.
Who runs trials of these drugs
Principal investigators and study chairs on 1 registry trials, updated in the last three years, of the most advanced drugs against CDK12 (roniciclib, AT-7519), ranked by Phase 2+ trials. Live from ClinicalTrials.gov.
- Khanh T DoDana-Farber - Harvard Cancer Center LAO · 0 of 1 trials Phase 2+
Registry trials of roniciclib, AT-7519 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; 1 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.
5 trials of drugs against CDK12 were stopped early; 4 give no reason
Terminated, withdrawn and suspended interventional trials of roniciclib, AT-7519, AZD-5438, PHA-793887, 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 5 most recent of 5.
- terminated · 2021-04-08 · Bayer · Roniciclib (BAY1000394)No reason given
- terminated · 2018-06-25 · Bayer · Roniciclib (BAY1000394)No reason given
- withdrawn · 2016-08-10 · Yonsei University · BAY 1000394 (Roniciclib) in combination with docetaxelNo reason given
- withdrawn · 2016-07-01 · Dana-Farber Cancer Institute · matched by the registry's drug synonyms“Development of BAY1000394 has been terminated by Bayer.”
- terminated · 2009-10-16 · Nerviano Medical Sciences · PHA-793887No reason given
Paediatric incentives and obligations for CDK12's drugs
For roniciclib, AT-7519, AZD-5438, PHA-793887: 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: yes · CDK12 is on the list. Membership alone neither requires nor waives a pediatric study.Rule: 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 roniciclib, at-7519, azd-5438, pha-793887Rule: 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 roniciclib, at-7519, azd-5438, pha-793887Rule: 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 roniciclib, at-7519, azd-5438, pha-793887Rule: 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 roniciclib, at-7519, azd-5438, pha-793887Rule: FDA's Pediatric Oncology Drug Approvals table names the drug. Source: FDA Pediatric Oncology Drug Approvals (content current as of 2026-03-03), 2026-11-11
- Registered studies open to children: no · No interventional study of roniciclib, at-7519, azd-5438, pha-793887 includes patients under 18Rule: The registry's age group includes Child (birth to 17 years), which also counts studies that set no minimum age. Source: ClinicalTrials.gov search, 2026-11-11
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 4 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 |
|---|---|---|---|---|
| RONICICLIB | Small molecule | phase 2 | small cell lung carcinoma, non-small cell lung carcinoma, cancer | Open Targets · ChEMBL |
| AT-7519 | Small molecule | phase 2 | mantle cell lymphoma, B-cell chronic lymphocytic leukemia, plasma cell myeloma | Open Targets · ChEMBL |
| AZD-5438 | Small molecule | phase 1 | – | Open Targets · ChEMBL |
| PHA-793887 | Small molecule | phase 1 | – | Open Targets · ChEMBL |