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Krivacic C, Kundert K, Pan X, Pache RA, Liu L, Conchúir SO, Jeliazkov JR, Gray JJ, Thompson MC, Fraser JS, Kortemme T. Accurate positioning of functional residues with robotics-inspired computational protein design. Proc Natl Acad Sci U S A 2022; 119:e2115480119. [PMID: 35254891 PMCID: PMC8931229 DOI: 10.1073/pnas.2115480119] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2021] [Accepted: 01/27/2022] [Indexed: 11/18/2022] Open
Abstract
SignificanceComputational protein design promises to advance applications in medicine and biotechnology by creating proteins with many new and useful functions. However, new functions require the design of specific and often irregular atom-level geometries, which remains a major challenge. Here, we develop computational methods that design and predict local protein geometries with greater accuracy than existing methods. Then, as a proof of concept, we leverage these methods to design new protein conformations in the enzyme ketosteroid isomerase that change the protein's preference for a key functional residue. Our computational methods are openly accessible and can be applied to the design of other intricate geometries customized for new user-defined protein functions.
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Affiliation(s)
- Cody Krivacic
- UC Berkeley–UCSF Graduate Program in Bioengineering, University of California, San Francisco, CA 94158
- Department of Bioengineering and Therapeutic Sciences, University of California, San Francisco, CA 94158
| | - Kale Kundert
- Department of Bioengineering and Therapeutic Sciences, University of California, San Francisco, CA 94158
- Biophysics Graduate Program, University of California, San Francisco, CA 94158
| | - Xingjie Pan
- UC Berkeley–UCSF Graduate Program in Bioengineering, University of California, San Francisco, CA 94158
- Department of Bioengineering and Therapeutic Sciences, University of California, San Francisco, CA 94158
| | - Roland A. Pache
- Department of Bioengineering and Therapeutic Sciences, University of California, San Francisco, CA 94158
| | - Lin Liu
- Department of Bioengineering and Therapeutic Sciences, University of California, San Francisco, CA 94158
| | - Shane O Conchúir
- Department of Bioengineering and Therapeutic Sciences, University of California, San Francisco, CA 94158
| | | | - Jeffrey J. Gray
- Department of Chemical and Biomolecular Engineering, Johns Hopkins University, Baltimore, MD 21218
| | - Michael C. Thompson
- Department of Bioengineering and Therapeutic Sciences, University of California, San Francisco, CA 94158
| | - James S. Fraser
- UC Berkeley–UCSF Graduate Program in Bioengineering, University of California, San Francisco, CA 94158
- Department of Bioengineering and Therapeutic Sciences, University of California, San Francisco, CA 94158
- Biophysics Graduate Program, University of California, San Francisco, CA 94158
- Quantitative Biosciences Institute, University of California, San Francisco, CA 94158
| | - Tanja Kortemme
- UC Berkeley–UCSF Graduate Program in Bioengineering, University of California, San Francisco, CA 94158
- Department of Bioengineering and Therapeutic Sciences, University of California, San Francisco, CA 94158
- Biophysics Graduate Program, University of California, San Francisco, CA 94158
- Quantitative Biosciences Institute, University of California, San Francisco, CA 94158
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Peng F, Cheng X, Wang H, Song S, Chen T, Li X, He Y, Huang Y, Liu S, Yang F, Su Z. Structure-based reconstruction of a Mycobacterium hypothetical protein into an active Δ 5-3-ketosteroid isomerase. BIOCHIMICA ET BIOPHYSICA ACTA-PROTEINS AND PROTEOMICS 2019; 1867:821-830. [PMID: 31226491 DOI: 10.1016/j.bbapap.2019.06.008] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/26/2018] [Revised: 06/12/2019] [Accepted: 06/14/2019] [Indexed: 11/25/2022]
Abstract
Protein engineering based on structure homology holds the potential to engineer steroid-transforming enzymes on demand. Based on the genome sequencing analysis of industrial Mycobacterium strain HGMS2 to produce 4-androstene-3,17-dione (4-AD), three hypothetical proteins were predicted as putative Δ5-3-ketosteroid isomerases (KSIs) to catalyze an intramolecular proton transfer involving the transformation of 5-androstene-3,17-dione (5-AD) into 4-AD, which were defined as mKSI228, mKSI291 and mKSI753. Activity assays indicated that mKSI228 and mKSI291 exhibited weak activity, as low as 0.7% and 1.5%, respectively, of a well-studied and highly active KSI from Pseudomonas putida KSI (pKSI), while mKSI753 had no activity similar to Mycobacterium tuberculosis KSI (mtKSI). Although the 3D structures of the putative mKSIs were homologous to pKSI, their amino acid sequences were significantly different from those of pKSI and tKSI. Thus, by use of these two KSIs as homology models, we were able to convert the low-active mKSI291 into a high-active active KSI by site-directed mutagenesis. On the other hand, an X-ray crystallographic structure of mKSI291 identified a water molecule in its active site. This unique water molecule might function as a bridge to connect Ser-OH, Tyr57-OH and C3O of the intermediate form a hydrogen-bonding network that was responsible for its weak activity, compared with that of mtKSI. Our results not only demonstrated the use of a protein engineering approach to understanding KSI catalytic mechanism, but also provided an example for engineering the catalytic active sites and gaining a functional enzyme based on homologous structures.
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Affiliation(s)
- Fei Peng
- Key Laboratory of Industrial Fermentation (Ministry of Education), National "111" Center for Cellular Regulation and Molecular Pharmaceutics and Department of Biological and Food Engineering, Hubei University of Technology, Wuhan 430068, China
| | - Xiyao Cheng
- Key Laboratory of Industrial Fermentation (Ministry of Education), National "111" Center for Cellular Regulation and Molecular Pharmaceutics and Department of Biological and Food Engineering, Hubei University of Technology, Wuhan 430068, China; Wuhan Amersino Biodevelop Inc, B1-Building, Biolake Park, Wuhan 430075, China
| | - Hongwei Wang
- Key Laboratory of Industrial Fermentation (Ministry of Education), National "111" Center for Cellular Regulation and Molecular Pharmaceutics and Department of Biological and Food Engineering, Hubei University of Technology, Wuhan 430068, China
| | - Shikui Song
- Key Laboratory of Industrial Fermentation (Ministry of Education), National "111" Center for Cellular Regulation and Molecular Pharmaceutics and Department of Biological and Food Engineering, Hubei University of Technology, Wuhan 430068, China
| | - Tian Chen
- Key Laboratory of Industrial Fermentation (Ministry of Education), National "111" Center for Cellular Regulation and Molecular Pharmaceutics and Department of Biological and Food Engineering, Hubei University of Technology, Wuhan 430068, China
| | - Xin Li
- Key Laboratory of Industrial Fermentation (Ministry of Education), National "111" Center for Cellular Regulation and Molecular Pharmaceutics and Department of Biological and Food Engineering, Hubei University of Technology, Wuhan 430068, China
| | - Yijun He
- Hubei Goto Biotech Inc, No. 1 Baiguoshu Road, Shuidu Industrial Park, Danjiangkou, Hubei 442700, China
| | - Yongqi Huang
- Key Laboratory of Industrial Fermentation (Ministry of Education), National "111" Center for Cellular Regulation and Molecular Pharmaceutics and Department of Biological and Food Engineering, Hubei University of Technology, Wuhan 430068, China
| | - Sen Liu
- Key Laboratory of Industrial Fermentation (Ministry of Education), National "111" Center for Cellular Regulation and Molecular Pharmaceutics and Department of Biological and Food Engineering, Hubei University of Technology, Wuhan 430068, China
| | - Fei Yang
- College of Life Sciences, Wuhan University, Wuhan 430072, China.
| | - Zhengding Su
- Key Laboratory of Industrial Fermentation (Ministry of Education), National "111" Center for Cellular Regulation and Molecular Pharmaceutics and Department of Biological and Food Engineering, Hubei University of Technology, Wuhan 430068, China; Wuhan Amersino Biodevelop Inc, B1-Building, Biolake Park, Wuhan 430075, China.
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