Evidence map›Paper›PMID 34291038›Full record

ReviewFrontiers in chemistry2021

E3 Ligase Ligands in Successful PROTACs: An Overview of Syntheses and Linker Attachment Points.

Aleša Bricelj, Christian Steinebach, Robert Kuchta, Michael Gütschow, Izidor Sosič

Open access · goldAbstract readReview
In one paragraph

Review in Frontiers in chemistry, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 95 papers.

0numbers the graph read from it
0cells of the map it votes in
95citing papers in PubMed
12.4field-weighted citation impact, top 1% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

95 citing papers in PubMed, 202 citations in OpenAlex.

  1. Review
  2. Generalizable Strategies for the Synthesis of Cereblon-Recruiting PROTAC Prodrugs.Angewandte Chemie (International ed. in English) · 2026
    Article
  3. Article
  4. Article
  5. Review
  6. Article
  7. Article
  8. Review
  9. Review
  10. Article
  11. A Facile Protocol for C(spChemMedChem · 2026
    Article
  12. Article
  13. A Scalable Design for Proximity-Inducing Molecules.bioRxiv : the preprint server for biology · 2026
    Article
  14. Review
  15. Review
  16. Article
  17. Review
  18. Review
  19. Article
  20. Article

35 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

5 authors at 2 institutions in 2 countries.

Aleša BriceljFaculty of Pharmacy, University of Ljubljana, Ljubljana, Slovenia.
Christian SteinebachPharmaceutical Institute, University of Bonn, Bonn, Germany.
Robert KuchtaPharmaceutical Institute, University of Bonn, Bonn, Germany.
Michael GütschowPharmaceutical Institute, University of Bonn, Bonn, Germany.
Izidor SosičFaculty of Pharmacy, University of Ljubljana, Ljubljana, Slovenia.
University of Bonn · DEUniversity of Ljubljana · SI

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Proteolysis-targeting chimeras (PROTACs) have received tremendous attention as a new and exciting class of therapeutic agents that promise to significantly impact drug discovery. These bifunctional molecules consist of a target binding unit, a linker, and an E3 ligase binding moiety. The chemically-induced formation of ternary complexes leads to ubiquitination and proteasomal degradation of target proteins. Among the plethora of E3 ligases, only a few have been utilized for the novel PROTAC technology. However, extensive knowledge on the preparation of E3 ligands and their utilization for PROTACs has already been acquired. This review provides an in-depth analysis of synthetic entries to functionalized ligands for the most relevant E3 ligase ligands, i.e. CRBN, VHL, IAP, and MDM2. Less commonly used E3 ligase and their ligands are also presented. We compare different preparative routes to E3 ligands with respect to feasibility and productivity. A particular focus was set on the chemistry of the linker attachment by discussing the synthetic opportunities to connect the E3 ligand at an appropriate exit vector with a linker to assemble the final PROTAC. This comprehensive review includes many facets involved in the synthesis of such complex molecules and is expected to serve as a compendium to support future synthetic attempts towards PROTACs.

Indexed as

bifunctional moleculescereblondrug synthesisE3 ligase ligandslinker attachmentPROTACsvon Hippel–Lindau

Identifiers

PMID34291038
PMCPMC8287636
OpenAlexW3182488106

What OpenQuestion holds

Textmetadata
LicenceCC BY
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.