1
|
Consalvo CD, Aderounmu AM, Donelick HM, Aruscavage PJ, Eckert DM, Shen PS, Bass BL. Caenorhabditis elegans Dicer acts with the RIG-I-like helicase DRH-1 and RDE-4 to cleave dsRNA. eLife 2024; 13:RP93979. [PMID: 38747717 PMCID: PMC11095941 DOI: 10.7554/elife.93979] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/18/2024] Open
Abstract
Invertebrates use the endoribonuclease Dicer to cleave viral dsRNA during antiviral defense, while vertebrates use RIG-I-like Receptors (RLRs), which bind viral dsRNA to trigger an interferon response. While some invertebrate Dicers act alone during antiviral defense, Caenorhabditis elegans Dicer acts in a complex with a dsRNA binding protein called RDE-4, and an RLR ortholog called DRH-1. We used biochemical and structural techniques to provide mechanistic insight into how these proteins function together. We found RDE-4 is important for ATP-independent and ATP-dependent cleavage reactions, while helicase domains of both DCR-1 and DRH-1 contribute to ATP-dependent cleavage. DRH-1 plays the dominant role in ATP hydrolysis, and like mammalian RLRs, has an N-terminal domain that functions in autoinhibition. A cryo-EM structure indicates DRH-1 interacts with DCR-1's helicase domain, suggesting this interaction relieves autoinhibition. Our study unravels the mechanistic basis of the collaboration between two helicases from typically distinct innate immune defense pathways.
Collapse
Affiliation(s)
- Claudia D Consalvo
- Department of Biochemistry, University of UtahSalt Lake CityUnited States
| | | | - Helen M Donelick
- Department of Biochemistry, University of UtahSalt Lake CityUnited States
| | | | - Debra M Eckert
- Department of Biochemistry, University of UtahSalt Lake CityUnited States
| | - Peter S Shen
- Department of Biochemistry, University of UtahSalt Lake CityUnited States
| | - Brenda L Bass
- Department of Biochemistry, University of UtahSalt Lake CityUnited States
| |
Collapse
|
2
|
Consalvo CD, Aderounmu AM, Donelick HM, Aruscavage PJ, Eckert DM, Shen PS, Bass BL. C. elegans Dicer acts with the RIG-I-like helicase DRH-1 and RDE-4 to cleave dsRNA. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2023.09.21.558868. [PMID: 37790392 PMCID: PMC10542151 DOI: 10.1101/2023.09.21.558868] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/05/2023]
Abstract
Invertebrates use the endoribonuclease Dicer to cleave viral dsRNA during antiviral defense, while vertebrates use RIG-I-like Receptors (RLRs), which bind viral dsRNA to trigger an interferon response. While some invertebrate Dicers act alone during antiviral defense, C. elegans Dicer acts in a complex with a dsRNA binding protein called RDE-4, and an RLR ortholog called DRH-1. We used biochemical and structural techniques to provide mechanistic insight into how these proteins function together. We found RDE-4 is important for ATP-independent and ATP-dependent cleavage reactions, while helicase domains of both DCR-1 and DRH-1 contribute to ATP-dependent cleavage. DRH-1 plays the dominant role in ATP hydrolysis, and like mammalian RLRs, has an N-terminal domain that functions in autoinhibition. A cryo-EM structure indicates DRH-1 interacts with DCR-1's helicase domain, suggesting this interaction relieves autoinhibition. Our study unravels the mechanistic basis of the collaboration between two helicases from typically distinct innate immune defense pathways.
Collapse
Affiliation(s)
| | - Adedeji M. Aderounmu
- Department of Biochemistry, University of Utah, Salt Lake City, UT 84112
- These authors contributed equally
| | - Helen M. Donelick
- Department of Biochemistry, University of Utah, Salt Lake City, UT 84112
- These authors contributed equally
| | - P. Joe Aruscavage
- Department of Biochemistry, University of Utah, Salt Lake City, UT 84112
| | - Debra M. Eckert
- Department of Biochemistry, University of Utah, Salt Lake City, UT 84112
| | - Peter S. Shen
- Department of Biochemistry, University of Utah, Salt Lake City, UT 84112
| | - Brenda L. Bass
- Department of Biochemistry, University of Utah, Salt Lake City, UT 84112
- Lead Contact
| |
Collapse
|
3
|
Ploetz E, Ambrose B, Barth A, Börner R, Erichson F, Kapanidis AN, Kim HD, Levitus M, Lohman TM, Mazumder A, Rueda DS, Steffen FD, Cordes T, Magennis SW, Lerner E. A new twist on PIFE: photoisomerisation-related fluorescence enhancement. Methods Appl Fluoresc 2023; 12:012001. [PMID: 37726007 PMCID: PMC10570931 DOI: 10.1088/2050-6120/acfb58] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2023] [Revised: 07/24/2023] [Accepted: 09/19/2023] [Indexed: 09/21/2023]
Abstract
PIFE was first used as an acronym for protein-induced fluorescence enhancement, which refers to the increase in fluorescence observed upon the interaction of a fluorophore, such as a cyanine, with a protein. This fluorescence enhancement is due to changes in the rate ofcis/transphotoisomerisation. It is clear now that this mechanism is generally applicable to interactions with any biomolecule. In this review, we propose that PIFE is thereby renamed according to its fundamental working principle as photoisomerisation-related fluorescence enhancement, keeping the PIFE acronym intact. We discuss the photochemistry of cyanine fluorophores, the mechanism of PIFE, its advantages and limitations, and recent approaches to turning PIFE into a quantitative assay. We provide an overview of its current applications to different biomolecules and discuss potential future uses, including the study of protein-protein interactions, protein-ligand interactions and conformational changes in biomolecules.
Collapse
Affiliation(s)
- Evelyn Ploetz
- Department of Chemistry and Center for NanoScience (CeNS), Ludwig-Maximilians-Universität München, Butenandtstr. 5-13, 81377 München, Germany
| | - Benjamin Ambrose
- Department of Infectious Disease, Faculty of Medicine, Imperial College London, London, W12 0HS, United Kingdom
- Single Molecule Imaging Group, MRC-London Institute of Medical Sciences, London, W12 0HS, United Kingdom
| | - Anders Barth
- Department of Bionanoscience, Kavli Institute of Nanoscience, Delft University of Technology, Delft 2629 HZ, The Netherlands
| | - Richard Börner
- Laserinstitut Hochschule Mittweida, Mittweida University of Applied Sciences, Mittweida, Germany
| | - Felix Erichson
- Laserinstitut Hochschule Mittweida, Mittweida University of Applied Sciences, Mittweida, Germany
| | - Achillefs N Kapanidis
- Biological Physics Research Group, Department of Physics, University of Oxford, Oxford, United Kingdom
- Kavli Institute for Nanoscience Discovery, Dorothy Crowfoot Hodgkin Building, University of Oxford, Oxford, United Kingdom
| | - Harold D Kim
- School of Physics, Georgia Institute of Technology, 837 State Street, Atlanta, GA 30332, United States of America
| | - Marcia Levitus
- School of Molecular Sciences, Arizona State University, 551 E. University Drive, Tempe, AZ,85287, United States of America
| | - Timothy M Lohman
- Department of Biochemistry and Molecular Biophysics, Washington University in St. Louis School of Medicine, St. Louis, MO 63110, United States of America
| | - Abhishek Mazumder
- CSIR-Institute of Chemical Biology, 4, Raja S.C. Mullick Road, Jadavpur, Kolkata-700032, West Bengal, India
| | - David S Rueda
- Department of Infectious Disease, Faculty of Medicine, Imperial College London, London, W12 0HS, United Kingdom
- Single Molecule Imaging Group, MRC-London Institute of Medical Sciences, London, W12 0HS, United Kingdom
| | - Fabio D Steffen
- Department of Chemistry, University of Zurich, Zurich, Switzerland
| | - Thorben Cordes
- Physical and Synthetic Biology, Faculty of Biology, Großhadernerstr. 2-4, Ludwig-Maximilians-Universität München, 82152 Planegg-Martinsried, Germany
| | - Steven W Magennis
- School of Chemistry, University of Glasgow, Joseph Black Building, University Avenue, Glasgow, G12 8QQ, United Kingdom
| | - Eitan Lerner
- Department of Biological Chemistry, Alexander Silberman Institute of Life Sciences, Faculty of Mathematics & Science, Edmond J. Safra Campus, Hebrew University of Jerusalem; Jerusalem 9190401, Israel
- Center for Nanoscience and Nanotechnology, Hebrew University of Jerusalem; Jerusalem 9190401, Israel
| |
Collapse
|
4
|
Ploetz E, Ambrose B, Barth A, Börner R, Erichson F, Kapanidis AN, Kim HD, Levitus M, Lohman TM, Mazumder A, Rueda DS, Steffen FD, Cordes T, Magennis SW, Lerner E. A new twist on PIFE: photoisomerisation-related fluorescence enhancement. ARXIV 2023:arXiv:2302.12455v2. [PMID: 36866225 PMCID: PMC9980184] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 03/04/2023]
Abstract
PIFE was first used as an acronym for protein-induced fluorescence enhancement, which refers to the increase in fluorescence observed upon the interaction of a fluorophore, such as a cyanine, with a protein. This fluorescence enhancement is due to changes in the rate of cis/trans photoisomerisation. It is clear now that this mechanism is generally applicable to interactions with any biomolecule and, in this review, we propose that PIFE is thereby renamed according to its fundamental working principle as photoisomerisation-related fluorescence enhancement, keeping the PIFE acronym intact. We discuss the photochemistry of cyanine fluorophores, the mechanism of PIFE, its advantages and limitations, and recent approaches to turn PIFE into a quantitative assay. We provide an overview of its current applications to different biomolecules and discuss potential future uses, including the study of protein-protein interactions, protein-ligand interactions and conformational changes in biomolecules.
Collapse
Affiliation(s)
- Evelyn Ploetz
- Department of Chemistry and Center for NanoScience (CeNS), Ludwig-Maximilians-Universität München, Butenandtstr. 5-13, 81377 München, Germany
| | - Benjamin Ambrose
- Department of Infectious Disease, Faculty of Medicine, Imperial College London, London, W12 0HS, UK, Single Molecule Imaging Group, MRC-London Institute of Medical Sciences, London, W12 0HS, UK
| | - Anders Barth
- Department of Bionanoscience, Kavli Institute of Nanoscience, Delft University of Technology, Delft 2629 HZ, The Netherlands
| | - Richard Börner
- Laserinstitut Hochschule Mittweida, Mittweida University of Applied Sciences, Mittweida, Germany
| | - Felix Erichson
- Laserinstitut Hochschule Mittweida, Mittweida University of Applied Sciences, Mittweida, Germany
| | - Achillefs N. Kapanidis
- Kavli Institute for Nanoscience Discovery, Department of Biological Physics, The University of Oxford, UK
| | - Harold D. Kim
- School of Physics, Georgia Institute of Technology, 837 State Street, Atlanta, GA 30332, USA
| | - Marcia Levitus
- School of Molecular Sciences, Arizona State University, 551 E. University Drive, Tempe, AZ, 85287, USA
| | - Timothy M. Lohman
- Department of Biochemistry and Molecular Biophysics, Washington University in St. Louis School of Medicine, St. Louis, MO 63110, USA
| | - Abhishek Mazumder
- Kavli Institute for Nanoscience Discovery, Department of Biological Physics, The University of Oxford, UK
| | - David S. Rueda
- Department of Infectious Disease, Faculty of Medicine, Imperial College London, London, W12 0HS, UK, Single Molecule Imaging Group, MRC-London Institute of Medical Sciences, London, W12 0HS, UK
| | - Fabio D. Steffen
- Department of Chemistry, University of Zurich, Zurich, Switzerland
| | - Thorben Cordes
- Physical and Synthetic Biology, Faculty of Biology, Ludwig-Maximilians-Universität München, Großhadernerstr, 2-4, 82152 Planegg-Martinsried, Germany
| | - Steven W. Magennis
- School of Chemistry, University of Glasgow, Joseph Black Building, University Avenue, Glasgow, G12 8QQ, UK
| | - Eitan Lerner
- Department of Biological Chemistry, Alexander Silberman Institute of Life Sciences, Faculty of Mathematics & Science, Edmond J. Safra Campus, Hebrew University of Jerusalem; Jerusalem 9190401, Israel, Center for Nanoscience and Nanotechnology, Hebrew University of Jerusalem; Jerusalem 9190401, Israel
| |
Collapse
|
5
|
Torrez RM, Ohi MD, Garner AL. Structural Insights into the Advances and Mechanistic Understanding of Human Dicer. Biochemistry 2023; 62:1-16. [PMID: 36534787 DOI: 10.1021/acs.biochem.2c00570] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
The RNase III endoribonuclease Dicer was discovered to be associated with cleavage of double-stranded RNA in 2001. Since then, many advances in our understanding of Dicer function have revealed that the enzyme plays a major role not only in microRNA biology but also in multiple RNA interference-related pathways. Yet, there is still much to be learned regarding Dicer structure-function in relation to how Dicer and Dicer-like enzymes initiate their cleavage reaction and release the desired RNA product. This Perspective describes the latest advances in Dicer structural studies, expands on what we have learned from this data, and outlines key gaps in knowledge that remain to be addressed. More specifically, we focus on human Dicer and highlight the intermediate processing steps where there is a lack of structural data to understand how the enzyme traverses from pre-cleavage to cleavage-competent states. Understanding these details is necessary to model Dicer's function as well as develop more specific microRNA-targeted therapeutics for the treatment of human diseases.
Collapse
Affiliation(s)
- Rachel M Torrez
- Department of Medicinal Chemistry, College of Pharmacy, University of Michigan, 428 Church Street, Ann Arbor, Michigan 48109, United States.,Life Sciences Institute, University of Michigan, 210 Washtenaw Avenue, Ann Arbor, Michigan 48109, United States
| | - Melanie D Ohi
- Life Sciences Institute, University of Michigan, 210 Washtenaw Avenue, Ann Arbor, Michigan 48109, United States.,Department of Cell and Developmental Biology, University of Michigan Medical School, 109 Zina Pitcher Place, Ann Arbor, Michigan 48109, United States
| | - Amanda L Garner
- Department of Medicinal Chemistry, College of Pharmacy, University of Michigan, 428 Church Street, Ann Arbor, Michigan 48109, United States
| |
Collapse
|
6
|
Su S, Wang J, Deng T, Yuan X, He J, Liu N, Li X, Huang Y, Wang HW, Ma J. Structural insights into dsRNA processing by Drosophila Dicer-2-Loqs-PD. Nature 2022; 607:399-406. [PMID: 35768513 PMCID: PMC9279154 DOI: 10.1038/s41586-022-04911-x] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2021] [Accepted: 05/25/2022] [Indexed: 12/21/2022]
Abstract
Small interfering RNAs (siRNAs) are the key components for RNA interference (RNAi), a conserved RNA-silencing mechanism in many eukaryotes1,2. In Drosophila, an RNase III enzyme Dicer-2 (Dcr-2), aided by its cofactor Loquacious-PD (Loqs-PD), has an important role in generating 21 bp siRNA duplexes from long double-stranded RNAs (dsRNAs)3,4. ATP hydrolysis by the helicase domain of Dcr-2 is critical to the successful processing of a long dsRNA into consecutive siRNA duplexes5,6. Here we report the cryo-electron microscopy structures of Dcr-2-Loqs-PD in the apo state and in multiple states in which it is processing a 50 bp dsRNA substrate. The structures elucidated interactions between Dcr-2 and Loqs-PD, and substantial conformational changes of Dcr-2 during a dsRNA-processing cycle. The N-terminal helicase and domain of unknown function 283 (DUF283) domains undergo conformational changes after initial dsRNA binding, forming an ATP-binding pocket and a 5'-phosphate-binding pocket. The overall conformation of Dcr-2-Loqs-PD is relatively rigid during translocating along the dsRNA in the presence of ATP, whereas the interactions between the DUF283 and RIIIDb domains prevent non-specific cleavage during translocation by blocking the access of dsRNA to the RNase active centre. Additional ATP-dependent conformational changes are required to form an active dicing state and precisely cleave the dsRNA into a 21 bp siRNA duplex as confirmed by the structure in the post-dicing state. Collectively, this study revealed the molecular mechanism for the full cycle of ATP-dependent dsRNA processing by Dcr-2-Loqs-PD.
Collapse
Affiliation(s)
- Shichen Su
- State Key Laboratory of Genetic Engineering, Collaborative Innovation Center of Genetics and Development, Department of Biochemistry and Biophysics, School of Life Sciences, Fudan University, Shanghai, China
| | - Jia Wang
- Ministry of Education Key Laboratory of Protein Sciences, Tsinghua-Peking Joint Center for Life Sciences, Beijing Advanced Innovation Center for Structural Biology, Beijing Frontier Research Center of Biological Structures, School of Life Sciences, Tsinghua University, Beijing, China
| | - Ting Deng
- State Key Laboratory of Genetic Engineering, Collaborative Innovation Center of Genetics and Development, Department of Biochemistry and Biophysics, School of Life Sciences, Fudan University, Shanghai, China
| | - Xun Yuan
- Shanghai Key Laboratory of Biliary Tract Disease Research, Shanghai Research Center of Biliary Tract Disease, Department of General Surgery, Xinhua Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Jinqiu He
- State Key Laboratory of Genetic Engineering, Collaborative Innovation Center of Genetics and Development, Department of Biochemistry and Biophysics, School of Life Sciences, Fudan University, Shanghai, China
| | - Nan Liu
- Ministry of Education Key Laboratory of Protein Sciences, Tsinghua-Peking Joint Center for Life Sciences, Beijing Advanced Innovation Center for Structural Biology, Beijing Frontier Research Center of Biological Structures, School of Life Sciences, Tsinghua University, Beijing, China
| | - Xiaomin Li
- Ministry of Education Key Laboratory of Protein Sciences, Tsinghua-Peking Joint Center for Life Sciences, Beijing Advanced Innovation Center for Structural Biology, Beijing Frontier Research Center of Biological Structures, School of Life Sciences, Tsinghua University, Beijing, China
| | - Ying Huang
- Shanghai Key Laboratory of Biliary Tract Disease Research, Shanghai Research Center of Biliary Tract Disease, Department of General Surgery, Xinhua Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Hong-Wei Wang
- Ministry of Education Key Laboratory of Protein Sciences, Tsinghua-Peking Joint Center for Life Sciences, Beijing Advanced Innovation Center for Structural Biology, Beijing Frontier Research Center of Biological Structures, School of Life Sciences, Tsinghua University, Beijing, China.
| | - Jinbiao Ma
- State Key Laboratory of Genetic Engineering, Collaborative Innovation Center of Genetics and Development, Department of Biochemistry and Biophysics, School of Life Sciences, Fudan University, Shanghai, China.
| |
Collapse
|
7
|
Jonely M, Singh RK, Donelick HM, Bass BL, Noriega R. Loquacious-PD regulates the terminus-dependent molecular recognition of Dicer-2 toward double-stranded RNA. Chem Commun (Camb) 2021; 57:10879-10882. [PMID: 34590626 DOI: 10.1039/d1cc03843e] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Dicer-2 cleaves double-stranded RNA into siRNAs in a terminus-dependent manner as part of D. melanogaster's RNA interference pathway. Using ultrafast fluorescence, we probe the local environment of chromophores at the dsRNA terminus upon binding by Dicer-2 and interrogate the effects of Loquacious-PD, an accessory protein. We find substrate-selective modes of molecular recognition that distinguish between blunt and 3'overhang termini, but whose differences are greatly reduced by Loquacious-PD. These results connect the molecular recognition properties of Dicer-2 to its selective processing of dsRNAs with different termini and to its need for Loquacious-PD to efficiently produce endogenous siRNAs.
Collapse
Affiliation(s)
- McKenzie Jonely
- University of Utah, Department of Chemistry, Salt Lake City, UT 84112, USA.
| | - Raushan K Singh
- University of Utah, Department of Biochemistry, Salt Lake City, UT 84112, USA
| | - Helen M Donelick
- University of Utah, Department of Biochemistry, Salt Lake City, UT 84112, USA
| | - Brenda L Bass
- University of Utah, Department of Biochemistry, Salt Lake City, UT 84112, USA
| | - Rodrigo Noriega
- University of Utah, Department of Chemistry, Salt Lake City, UT 84112, USA.
| |
Collapse
|