Known targets — ChEMBL curated mechanism
The experimentally established mechanism targets of Niraparib. 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 | |
|---|---|---|---|---|
| ▸ | PARP1 known ✓ | P09874 | 20/20 | 1.00 |
| ▸ | PARP2 known ✓ | Q9UGN5 | 11/20 | 1.00 |
| ▸ | PARP3 | Q9Y6F1 | 10/20 | 1.00 |
| ▸ | TNKS | O95271 | 1/20 | 1.00 |
| ▸ | CHRM2 | P08172 | 1/20 | 1.00 |
| ▸ | CHRM1 | P11229 | 1/20 | 1.00 |
| ▸ | SLC6A2 | P23975 | 1/20 | 1.00 |
| ▸ | SLC6A4 | P31645 | 1/20 | 1.00 |
| ▸ | ADRA1A | P35348 | 1/20 | 1.00 |
| ▸ | SLC6A3 | Q01959 | 1/20 | 1.00 |
| ▸ | KCNH2 | Q12809 | 1/20 | 1.00 |
| ▸ | DYRK1A | Q13627 | 1/20 | 1.00 |
| ▸ | PARP15 | Q460N3 | 1/20 | 1.00 |
| ▸ | PARP14 | Q460N5 | 1/20 | 1.00 |
| ▸ | PARP10 | Q53GL7 | 1/20 | 1.00 |
| ▸ | PARP12 | Q9H0J9 | 1/20 | 1.00 |
| ▸ | TNKS2 | Q9H2K2 | 1/20 | 1.00 |
| ▸ | PARP4 | Q9UKK3 | 1/20 | 1.00 |
| ▸ | DYRK1B | Q9Y463 | 1/20 | 1.00 |
| ▸ | HRH3 | Q9Y5N1 | 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 | |
|---|---|---|---|---|
| Niraparib SCHEMBL1422151 | 1.00 | PARP1 (1.00) | PARP1PARP2PARP3TNKSCHRM2 | |
| Niraparib SCHEMBL1421952 | 1.00 | PARP1 (1.00) | PARP1PARP2PARP3TNKSCHRM2 | |
| Niraparib SCHEMBL1422061 | 0.99 | PARP1 (0.98) | PARP1PARP2PARP3TNKSCHRM2 | |
| Niraparib SCHEMBL567839 | 0.99 | PARP1 (0.98) | PARP1PARP2PARP3TNKSCHRM2 | |
| Niraparib SCHEMBL28370623 | 0.99 | PARP1 (0.98) | PARP1PARP2PARP3TNKSCHRM2 | |
| Niraparib SCHEMBL567840 | 0.99 | PARP1 (0.98) | PARP1PARP2PARP3TNKSCHRM2 | |
| Niraparib SCHEMBL3737274 | 0.96 | PARP1 (0.92) | PARP1PARP2PARP3TNKSCHRM2 | |
| Niraparib SCHEMBL3737277 | 0.96 | PARP1 (0.92) | PARP1PARP2PARP3TNKSCHRM2 | |
| Niraparib SCHEMBL3740349 | 0.95 | PARP1 (0.91) | PARP1PARP2PARP3TNKSCHRM2 | |
| Niraparib SCHEMBL3659848 | 0.94 | PARP1 (0.89) | PARP1PARP2PARP3TNKSCHRM2 |
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 7679 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 |
|---|---|---|---|---|---|---|---|
| EP-4048809-B1 | SYSTEMS AND METHODS FOR PREDICTING THERAPEUTIC SENSITIVITY | TEMPUS AI INC (US) | 2026-05-27 | — | — | EP | claimed |
| US-12637510-B2 | Oncolytic virus compositions and methods for the treatment of cancer | CITY OF HOPE (US) | 2026-05-26 | — | — | US | claimed |
| CN-122075716-A | Medicine for treating tumor by combining recombinant oncolytic virus and small-molecule anticancer medicine | — | 2026-05-26 | — | — | CN | claimed |
| WO-2026105121-A1 | ANTICANCER FORMULATIONS AND USES THEREOF | INTRAGEL THERAPEUTICS LTD. (IL) | 2026-05-21 | — | — | WO | claimed |
| WO-2026106998-A1 | PROSTATE-SPECIFIC MEMBRANE ANTIGEN (PSMA)-TARGETED POLY(ADP-RIBOSE) POLYMERASE (PARP) INHIBITOR AND RELATED COMPOSITION AND METHOD OF USE | PURDUE RESEARCH FOUNDATION (US) | 2026-05-21 | — | — | WO | claimed |
| US-20260137700-A1 | PHARMACEUTICAL COMBINATION OF PRMT5 INHIBITOR AND DNA DAMAGE-INDUCING SUBSTANCE | SK BIOPHARMACEUTICALS CO LTD (KR) | 2026-05-21 | — | — | US | claimed |
| WO-2026106315-A1 | METHOD FOR PROVIDING INFORMATION ON ATM GENE FUNCTION | 연세대학교 산학협력단 | 2026-05-21 | — | — | WO | claimed |
| WO-2026104998-A1 | SUBSTITUTED IMIDAZOPYRIDINE COMPOUND DERIVATIVES AND THEIR PHARMACEUTICAL USE | AVELOS THERAPEUTICS INC. (KR) | 2026-05-21 | — | — | WO | claimed |
| EP-4743497-A2 | COMPOSITIONS AND METHODS RELATED TO TUMOR ACTIVATED ANTIBODIES TARGETING PSMA AND EFFECTOR CELL ANTIGENS | Janux Therapeutics, Inc. (US) | 2026-05-20 | — | — | EP | claimed |
| EP-4744665-A1 | COMBINATION OF POLQ INHIBITOR COMPOUND AND ANTI-CANCER THERAPEUTIC AGENT OR RADIOTHERAPY | Simcere Zaiming Pharmaceutical Co., Ltd. (CN) | 2026-05-20 | — | — | EP | claimed |
| WO-2017042634-A2 | USE OF DIANHYDROGALACTITOL OR DERIVATIVES AND ANALOGS THEREOF FOR TREATMENT OF NON-SMALL-CELL LUNG CARCINOMA, GLIOBLASTOMA, AND OVARIAN CARCINOMA BY INDUCTION OF DNA DAMAGE AND STALLING OF CELL CYCLE | DEL MAR PHARMACEUTICALS (CA) | 2017-03-16 | — | — | WO | claimed |
| EP-2805945-A1 | Amide substituted indazoles as poly(ADP-ribose)polymerase (PARP) inhibitors | MSD Italia S.r.l. (IT) | 2014-11-26 | — | — | EP | claimed |
| CN-101578279-B | Amide substituted indazoles as poly (ADP ribose) polymerase (PARP) inhibitors | ANGELETTI P IST RICHERCHE BIO | 2013-07-17 | — | — | CN | claimed |
| US-8071623-B2 | Anticancer, antiinflammatory, antitumor agents, diabetes, neurodegenerative diseases, retroviral infection, retinal damage or skin senescence and UV-induced skin damage; protecting against the toxicity of chemotherapy; 2-(4-Piperidin-3-ylphenyl)2H-indazole-7-carboxamide | INSTITUTO DI RICERCHE DI BIOLOGIA MOLECOLARE P. ANGELETTI SPA | 2011-12-06 | — | — | US | claimed |
| EP-2336120-A1 | Combinations containing amide substituted indazoles as poly(ADP-ribose)polymerase (PARP) inhibitors | Istituto di ricerche di Biologia Molecolare P. Angeletti S.R.L. (IT) | 2011-06-22 | — | — | EP | claimed |
| WO-2011058367-A2 | DIAGNOSTIC TEST FOR PREDICTING RESPONSIVENESS TO TREATMENT WITH POLY(ADP-RIBOSE) POLYMERASE (PARP) INHIBITOR | ASTRAZENECA AB (SE) | 2011-05-19 | — | — | WO | claimed |
| EP-2109608-B1 | AMIDE SUBSTITUTED INDAZOLES AS POLY(ADP-RIBOSE)POLYMERASE (PARP) INHIBITORS | ANGELETTI P IST RICHERCHE BIO (IT) | 2011-03-23 | — | — | EP | claimed |
| EP-2109608-A1 | AMIDE SUBSTITUTED INDAZOLES AS POLY(ADP-RIBOSE)POLYMERASE (PARP) INHIBITORS | Istituto di Richerche di Biologia Molecolare P. Angeletti S.p.A. (IT) | 2009-10-21 | — | — | EP | claimed |
| WO-2008084261-A1 | AMIDE SUBSTITUTED INDAZOLES AS POLY(ADP-RIBOSE)POLYMERASE (PARP) INHIBITORS | ISTITUTO DI RICERCHE DI BIOLOGIA MOLECOLARE P. ANGELETTI SPA (IT) | 2008-07-17 | — | — | WO | claimed |
| US-20080167345-A1 | Anticancer, antiinflammatory, antitumor agents, diabetes, neurodegenerative diseases, retroviral infection, retinal damage or skin senescence and UV-induced skin damage; protecting against the toxicity of chemotherapy; 2-(4-Piperidin-3-ylphenyl)2H-indazole-7-carboxamide | MERCK SHARP & DOHME LLC | 2008-07-10 | — | — | US | claimed |