Known targets — ChEMBL curated mechanism
The experimentally established mechanism targets of Topotecan. The predicted profile below is derived independently by chemical similarity — agreement is a validation signal, a miss is honest.
Predicted protein targets (top 20)
| gene | UniProt | supporting neighbours | confidence | |
|---|---|---|---|---|
| ▸ | TOP1 known ✓ | P11387 | 19/20 | 1.00 |
| ▸ | MEN1 | O00255 | 5/20 | 1.00 |
| ▸ | KMT2A | Q03164 | 5/20 | 1.00 |
| ▸ | SMN1; SMN2 | Q16637 | 5/20 | 1.00 |
| ▸ | KDM4E | B2RXH2 | 4/20 | 1.00 |
| ▸ | CASP1 | P29466 | 3/20 | 1.00 |
| ▸ | CASP7 | P55210 | 3/20 | 1.00 |
| ▸ | HBB | P68871 | 3/20 | 1.00 |
| ▸ | MAPT | P10636 | 3/20 | 1.00 |
| ▸ | USP2 | O75604 | 2/20 | 1.00 |
| ▸ | LMNA | P02545 | 2/20 | 1.00 |
| ▸ | BRCA1 | P38398 | 2/20 | 1.00 |
| ▸ | KEAP1 | Q14145 | 2/20 | 1.00 |
| ▸ | NFE2L2 | Q16236 | 2/20 | 1.00 |
| ▸ | HIF1A | Q16665 | 2/20 | 1.00 |
| ▸ | CYP3A4 | P08684 | 2/20 | 1.00 |
| ▸ | SLC22A2 | O15244 | 1/20 | 1.00 |
| ▸ | TOP2A | P11388 | 1/20 | 1.00 |
| ▸ | TOP2B | Q02880 | 1/20 | 1.00 |
| ▸ | SLC47A2 | Q86VL8 | 1/20 | 1.00 |
Click a target to see other patent compounds predicted against it — the reverse direction, in place.
Similar compounds — the chemically nearest patent molecules
Nearest neighbours by Morgan-fingerprint cosine across the patent-compound collection, with each neighbour's top predicted target and the predicted targets it shares with this molecule.
| Compound | similarity | top predicted | shared targets | |
|---|---|---|---|---|
| Topotecan SCHEMBL3927536 | 1.00 | TOP1 (1.00) | TOP1MEN1KMT2ASMN1; SMN2KDM4E | |
| Topotecan SCHEMBL30712226 | 1.00 | TOP1 (1.00) | TOP1MEN1KMT2ASMN1; SMN2KDM4E | |
| Topotecan SCHEMBL9971346 | 1.00 | TOP1 (1.00) | TOP1MEN1KMT2ASMN1; SMN2KDM4E | |
| Topotecan SCHEMBL29350221 | 1.00 | TOP1 (1.00) | TOP1MEN1KMT2ASMN1; SMN2KDM4E | |
| Topotecan SCHEMBL29726458 | 1.00 | TOP1 (1.00) | TOP1MEN1KMT2ASMN1; SMN2KDM4E | |
| Topotecan SCHEMBL31517322 | 1.00 | TOP1 (1.00) | TOP1MEN1KMT2ASMN1; SMN2KDM4E | |
| Topotecan SCHEMBL14577671 | 1.00 | TOP1 (1.00) | TOP1MEN1KMT2ASMN1; SMN2KDM4E | |
| Topotecan SCHEMBL5531617 | 1.00 | TOP1 (1.00) | TOP1MEN1KMT2ASMN1; SMN2KDM4E | |
| Topotecan SCHEMBL10278 | 0.99 | TOP1 (1.00) | TOP1MEN1KMT2ASMN1; SMN2KDM4E | |
| Topotecan SCHEMBL7247 | 0.99 | TOP1 (1.00) | TOP1MEN1KMT2ASMN1; SMN2KDM4E |
Similarity is cosine over the 2,048-bit Morgan fingerprint (≈ Tanimoto). Identical fingerprints score 1.00.
Patent provenance — the patents this molecule appears in, and who filed them
Appears in 155497 patents — a generic fragment claimed broadly, so it's down-weighted as IP noise. Top by claim status then date:
| Patent | Title | Assignee | Published | Priority | Filing | Country | Status |
|---|---|---|---|---|---|---|---|
| US-20260144890-A1 | ANTIBODY DRUG CONJUGATE COMPRISING NMT INHIBITOR CONJUGATED TO AN ANTIBODY | MyricX Pharma Limited (GB) | 2026-05-28 | — | — | US | claimed |
| US-20260144882-A1 | ANTI-NECTIN-4 ANTIBODY DRUG CONJUGATE AND USE THEREOF | BIO-THERA SOLUTIONS, LTD. (CN) | 2026-05-28 | — | — | US | claimed |
| EP-4748859-A2 | CHEMICALLY AND PHOTOCHEMICALLY INITIATED CELL MEMBRANE BLEBBING TO INDUCE CELL VESICLE PRODUCTION, MODIFICATIONS THEREOF, AND USES THEREOF | The Regents of the University of California (US) | 2026-05-27 | — | — | EP | claimed |
| EP-3607938-B1 | PHARMACEUTICAL COMPOSITION | SOVIC BRKICIC LJILJANA (HR) | 2026-05-27 | — | — | EP | claimed |
| CN-122075497-A | Use of NLRP3 agonist for tumor treatment | — | 2026-05-26 | — | — | CN | claimed |
| CN-122079990-A | Purino [1,2-a ] carbazoline derivative, and preparation method and application thereof | — | 2026-05-26 | — | — | CN | claimed |
| CN-122094686-A | Oncolytic adenovirus and topoisomerase I inhibitors for the treatment of cancer | — | 2026-05-26 | — | — | CN | claimed |
| CN-116209439-B | Cereblon protein modulators | Saint Jude Children's Research Hospital Ltd. (US) | 2026-05-26 | — | — | CN | claimed |
| US-20260141533-A1 | QUANTITATIVE IMAGING BIOMARKER FOR LUNG CANCER | THE TRUSTEES OF COLUMBIA UNIVERSITY IN THE CITY OF NEW YORK (US) | 2026-05-21 | — | — | US | claimed |
| WO-2026105121-A1 | ANTICANCER FORMULATIONS AND USES THEREOF | INTRAGEL THERAPEUTICS LTD. (IL) | 2026-05-21 | — | — | WO | claimed |
| EP-0572549-A1 | TREATMENT OF NON-SMALL CELL LUNG CARCINOMA | SMITHKLINE BEECHAM CORPORATION (US) | 1993-12-08 | — | — | EP | claimed |
| EP-0572563-A1 | TREATMENT OF ESOPHAGEAL CANCER | SMITHKLINE BEECHAM CORPORATION (US) | 1993-12-08 | — | — | EP | claimed |
| EP-0572557-A1 | TREATMENT OF OVARIAN CANCER | SMITHKLINE BEECHAM CORPORATION (US) | 1993-12-08 | — | — | EP | claimed |
| WO-1993011770-A1 | TREATMENT OF COLORECTAL CANCER | SMITHKLINE BEECHAM CORPORATION (US) | 1993-06-24 | — | — | WO | claimed |
| WO-1993009782-A1 | COMBINATION CHEMOTHERAPY | SMITHKLINE BEECHAM CORPORATION (US) | 1993-05-27 | — | — | WO | claimed |
| WO-1992014471-A1 | TREATMENT OF NON-SMALL CELL LUNG CARCINOMA | SMITHKLINE BEECHAM CORPORATION (US) | 1992-09-03 | — | — | WO | claimed |
| WO-1992014470-A1 | TREATMENT OF ESOPHAGEAL CANCER | SMITHKLINE BEECHAM CORPORATION (US) | 1992-09-03 | — | — | WO | claimed |
| WO-1992014469-A1 | TREATMENT OF OVARIAN CANCER | SMITHKLINE BEECHAM CORPORATION (US) | 1992-09-03 | — | — | WO | claimed |
| CN-1034724-A | WATER SOLUBLE CAMPTOTHECIN ANALOGS | SMITHKLINE BECKMAN CORP (US) | 1989-08-16 | — | — | CN | claimed |
| EP-0321122-A2 | Water soluble camptothecin analogs | SMITHKLINE BEECHAM CORPORATION (US) | 1989-06-21 | — | — | EP | claimed |