Probing Functional Heteromeric Chemokine Protein-Protein Interactions through Conformation-Assisted Oxime Ligation

Stijn M. Agten, Rory R. Koenen, Hans Ippel, Veit Eckardt, Philipp von Hundelshausen, Kevin H. Mayo, Christian Weber, Tilman M. Hackeng*

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

11 Citations (Web of Science)


Protein-protein interactions (PPIs) govern most processes in living cells. Current drug development strategies are aimed at disrupting or stabilizing PPIs, which require a thorough understanding of PPI mechanisms. Examples of such PPIs are heteromeric chemokine interactions that are potentially involved in pathological disorders such as cancer, atherosclerosis, and HIV. It remains unclear whether this functional modulation is mediated by heterodimer formation or by the additive effects of mixed chemokines on their respective receptors. To address this issue, we report the synthesis of a covalent RANTES-PF4 heterodimer (termed OPRAH) by total chemical synthesis and oxime ligation, with an acceleration of the final ligation step driven by PPIs between RANTES and PF4. Compared to mixed separate chemokines, OPRAH exhibited increased biological activity, thus providing evidence that physical formation of the heterodimer indeed mediates enhanced function.
Original languageEnglish
Pages (from-to)14963-14966
JournalAngewandte Chemie-International Edition
Issue number48
Publication statusPublished - 21 Nov 2016


  • atherosclerosis
  • chemokines
  • oximes
  • protein-protein interactions
  • solid-phase synthesis

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