Structural insights into ClpP protease side exit pore-opening by a pH drop coupled with substrate hydrolysis

Leehyeon Kim, Byung Gil Lee, Minki Kim, Min Kyung Kim, Do Hoon Kwon, Hyunmin Kim, Heike Brötz-Oesterhelt, Soung Hun Roh, Hyun Kyu Song

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

The ClpP serine peptidase is a tetradecameric degradation molecular machine involved in many physiological processes. It becomes a competent ATP-dependent protease when coupled with Clp-ATPases. Small chemical compounds, acyldepsipeptides (ADEPs), are known to cause the dysregulation and activation of ClpP without ATPases and have potential as novel antibiotics. Previously, structural studies of ClpP from various species revealed its structural details, conformational changes, and activation mechanism. Although product release through side exit pores has been proposed, the detailed driving force for product release remains elusive. Herein, we report crystal structures of ClpP from Bacillus subtilis (BsClpP) in unforeseen ADEP-bound states. Cryo-electron microscopy structures of BsClpP revealed various conformational states under different pH conditions. To understand the conformational change required for product release, we investigated the relationship between substrate hydrolysis and the pH-lowering process. The production of hydrolyzed peptides from acidic and basic substrates by proteinase K and BsClpP lowered the pH values. Our data, together with those of previous findings, provide insight into the molecular mechanism of product release by the ClpP self-compartmentalizing protease.

Original languageEnglish
Article numbere109755
JournalEMBO Journal
Volume41
Issue number13
DOIs
Publication statusPublished - 2022 Jul 4

Bibliographical note

Funding Information:
We thank the staff at beamlines 5C and 11C at the Pohang Accelerator Laboratory in South Korea and beamline NW12 at the Photon Factory in Japan for their help with X‐ray data collection. We also thank the staff of the cryo‐TEM facility at the Korea Basic Science Institute and the Center for Macromolecular and Cell Imaging, Seoul National University. This study was supported by National Research Foundation of Korea (NRF) grants from the Korean government (grant Nos. 2020R1A2C3008285, 2020R1A5A1019023, 2021M3A9G8024747, and 2021M3A9I4030068 for HKS; 2021M3A9I4021220, 2019M3E5D6063871, and 2020R1A5A1018081 for SHR; 2021R1A6A1A10045235 for LK) and the Deutsche Forschungsgemeinschaft (German Research Foundation, DFG) TRR 261, project‐ID 398967434 and cluster of excellence CMFI, project‐ID 390838134.

Funding Information:
We thank the staff at beamlines 5C and 11C at the Pohang Accelerator Laboratory in South Korea and beamline NW12 at the Photon Factory in Japan for their help with X-ray data collection. We also thank the staff of the cryo-TEM facility at the Korea Basic Science Institute and the Center for Macromolecular and Cell Imaging, Seoul National University. This study was supported by National Research Foundation of Korea (NRF) grants from the Korean government (grant Nos. 2020R1A2C3008285, 2020R1A5A1019023, 2021M3A9G8024747, and 2021M3A9I4030068 for HKS; 2021M3A9I4021220, 2019M3E5D6063871, and 2020R1A5A1018081 for SHR; 2021R1A6A1A10045235 for LK) and the Deutsche Forschungsgemeinschaft (German Research Foundation, DFG) TRR 261, project-ID 398967434 and cluster of excellence CMFI, project-ID 390838134.

Publisher Copyright:
© 2022 The Authors.

Keywords

  • ClpP
  • acyldepsipeptide
  • cryo-EM
  • pH drop
  • protein degradation

ASJC Scopus subject areas

  • General Neuroscience
  • Molecular Biology
  • General Biochemistry,Genetics and Molecular Biology
  • General Immunology and Microbiology

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