1
|
D'Amico RN, Boehr DD. Allostery, engineering and inhibition of tryptophan synthase. Curr Opin Struct Biol 2023; 82:102657. [PMID: 37467527 DOI: 10.1016/j.sbi.2023.102657] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2023] [Revised: 06/19/2023] [Accepted: 06/21/2023] [Indexed: 07/21/2023]
Abstract
The final two steps of tryptophan biosynthesis are catalyzed by the enzyme tryptophan synthase (TS), composed of alpha (αTS) and beta (βTS) subunits. Recently, experimental and computational methods have mapped "allosteric networks" that connect the αTS and βTS active sites. In αTS, allosteric networks change across the catalytic cycle, which might help drive the conformational changes associated with its function. Directed evolution studies to increase catalytic function and expand the substrate profile of stand-alone βTS have also revealed the importance of αTS in modulating the conformational changes in βTS. These studies also serve as a foundation for the development of TS inhibitors, which can find utility against Mycobacterium tuberculosis and other bacterial pathogens.
Collapse
Affiliation(s)
- Rebecca N D'Amico
- Department of Chemistry, Pennsylvania State University, University Park, PA, USA, 16802
| | - David D Boehr
- Department of Chemistry, Pennsylvania State University, University Park, PA, USA, 16802.
| |
Collapse
|
2
|
Laczi D, Johnstone MD, Fleming CL. Photoresponsive Small Molecule Inhibitors for the Remote Control of Enzyme Activity. Chem Asian J 2022; 17:e202200200. [PMID: 35446477 PMCID: PMC9322446 DOI: 10.1002/asia.202200200] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2022] [Revised: 04/01/2022] [Indexed: 12/14/2022]
Abstract
The development of new and effective therapeutics is reliant on the ability to study the underlying mechanisms of potential drug targets in live cells and multicellular systems. A persistent challenge in many drug development programmes is poor selectivity, which can obscure the mechanisms involved and lead to poorly understood modes of action. In efforts to improve our understanding of these complex processes, small molecule inhibitors have been developed in which their OFF/ON therapeutic activity can be toggled using light. Photopharmacology is devoted to using light to modulate drugs. Herein, we highlight the recent progress made towards the development of light‐responsive small molecule inhibitors of selected enzymatic targets. Given the size of this field, literature from 2015 onwards has been reviewed.
Collapse
Affiliation(s)
- Dóra Laczi
- Centre for Biomedical and Chemical Sciences, School of Science, Auckland University of Technology, Private Bag 92006, Auckland, 1142, New Zealand
| | - Mark D Johnstone
- Centre for Biomedical and Chemical Sciences, School of Science, Auckland University of Technology, Private Bag 92006, Auckland, 1142, New Zealand
| | - Cassandra L Fleming
- Centre for Biomedical and Chemical Sciences, School of Science, Auckland University of Technology, Private Bag 92006, Auckland, 1142, New Zealand
| |
Collapse
|
3
|
Kneuttinger AC. A guide to designing photocontrol in proteins: methods, strategies and applications. Biol Chem 2022; 403:573-613. [PMID: 35355495 DOI: 10.1515/hsz-2021-0417] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2021] [Accepted: 03/08/2022] [Indexed: 12/20/2022]
Abstract
Light is essential for various biochemical processes in all domains of life. In its presence certain proteins inside a cell are excited, which either stimulates or inhibits subsequent cellular processes. The artificial photocontrol of specifically proteins is of growing interest for the investigation of scientific questions on the organismal, cellular and molecular level as well as for the development of medicinal drugs or biocatalytic tools. For the targeted design of photocontrol in proteins, three major methods have been developed over the last decades, which employ either chemical engineering of small-molecule photosensitive effectors (photopharmacology), incorporation of photoactive non-canonical amino acids by genetic code expansion (photoxenoprotein engineering), or fusion with photoreactive biological modules (hybrid protein optogenetics). This review compares the different methods as well as their strategies and current applications for the light-regulation of proteins and provides background information useful for the implementation of each technique.
Collapse
Affiliation(s)
- Andrea C Kneuttinger
- Institute of Biophysics and Physical Biochemistry and Regensburg Center for Biochemistry, University of Regensburg, D-93040 Regensburg, Germany
| |
Collapse
|
4
|
Bosken YK, Ai R, Hilario E, Ghosh RK, Dunn MF, Kan S, Niks D, Zhou H, Ma W, Mueller LJ, Fan L, Chang CA. Discovery of antimicrobial agent targeting tryptophan synthase. Protein Sci 2022; 31:432-442. [PMID: 34767267 PMCID: PMC8820114 DOI: 10.1002/pro.4236] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2021] [Revised: 10/27/2021] [Accepted: 11/09/2021] [Indexed: 02/03/2023]
Abstract
Antibiotic resistance is a continually growing challenge in the treatment of various bacterial infections worldwide. New drugs and new drug targets are necessary to curb the threat of infectious diseases caused by multidrug-resistant pathogens. The tryptophan biosynthesis pathway is essential for bacterial growth but is absent in higher animals and humans. Drugs that can inhibit the bacterial biosynthesis of tryptophan offer a new class of antibiotics. In this work, we combined a structure-based strategy using in silico docking screening and molecular dynamics (MD) simulations to identify compounds targeting the α subunit of tryptophan synthase with experimental methods involving the whole-cell minimum inhibitory concentration (MIC) test, solution state NMR, and crystallography to confirm the inhibition of L-tryptophan biosynthesis. Screening 1,800 compounds from the National Cancer Institute Diversity Set I against α subunit revealed 28 compounds for experimental validation; four of the 28 hit compounds showed promising activity in MIC testing. We performed solution state NMR experiments to demonstrate that a one successful inhibitor, 3-amino-3-imino-2-phenyldiazenylpropanamide (Compound 1) binds to the α subunit. We also report a crystal structure of Salmonella enterica serotype Typhimurium tryptophan synthase in complex with Compound 1 which revealed a binding site at the αβ interface of the dimeric enzyme. MD simulations were carried out to examine two binding sites for the compound. Our results show that this small molecule inhibitor could be a promising lead for future drug development.
Collapse
Affiliation(s)
- Yuliana K. Bosken
- Department of ChemistryUniversity of California at RiversideRiversideCalifornia
| | - Rizi Ai
- Department of ChemistryUniversity of California at RiversideRiversideCalifornia
| | - Eduardo Hilario
- Department of ChemistryUniversity of California at RiversideRiversideCalifornia
| | - Rittik K. Ghosh
- Department of BiochemistryUniversity of California at RiversideRiversideCalifornia
| | - Michael F. Dunn
- Department of BiochemistryUniversity of California at RiversideRiversideCalifornia
| | - Shih‐Hsin Kan
- Department of ChemistryUniversity of California at RiversideRiversideCalifornia,Present address:
CHOC Research InstituteOrangeCalifornia
| | - Dimitri Niks
- Department of BiochemistryUniversity of California at RiversideRiversideCalifornia
| | - Huanbin Zhou
- Department of Microbiology and Plant PathologyUniversity of California at RiversideRiversideCalifornia,Present address:
Institute of Plant ProtectionChinese Academy of Agricultural SciencesBeijingChina
| | - Wenbo Ma
- Department of Microbiology and Plant PathologyUniversity of California at RiversideRiversideCalifornia,Present address:
The Sainsbury LaboratoryNorwich Research ParkNorwichUK
| | - Leonard J. Mueller
- Department of ChemistryUniversity of California at RiversideRiversideCalifornia
| | - Li Fan
- Department of BiochemistryUniversity of California at RiversideRiversideCalifornia
| | - Chia‐En A. Chang
- Department of ChemistryUniversity of California at RiversideRiversideCalifornia
| |
Collapse
|
5
|
Volarić J, Szymanski W, Simeth NA, Feringa BL. Molecular photoswitches in aqueous environments. Chem Soc Rev 2021; 50:12377-12449. [PMID: 34590636 PMCID: PMC8591629 DOI: 10.1039/d0cs00547a] [Citation(s) in RCA: 132] [Impact Index Per Article: 44.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2021] [Indexed: 12/17/2022]
Abstract
Molecular photoswitches enable dynamic control of processes with high spatiotemporal precision, using light as external stimulus, and hence are ideal tools for different research areas spanning from chemical biology to smart materials. Photoswitches are typically organic molecules that feature extended aromatic systems to make them responsive to (visible) light. However, this renders them inherently lipophilic, while water-solubility is of crucial importance to apply photoswitchable organic molecules in biological systems, like in the rapidly emerging field of photopharmacology. Several strategies for solubilizing organic molecules in water are known, but there are not yet clear rules for applying them to photoswitchable molecules. Importantly, rendering photoswitches water-soluble has a serious impact on both their photophysical and biological properties, which must be taken into consideration when designing new systems. Altogether, these aspects pose considerable challenges for successfully applying molecular photoswitches in aqueous systems, and in particular in biologically relevant media. In this review, we focus on fully water-soluble photoswitches, such as those used in biological environments, in both in vitro and in vivo studies. We discuss the design principles and prospects for water-soluble photoswitches to inspire and enable their future applications.
Collapse
Affiliation(s)
- Jana Volarić
- Centre for Systems Chemistry, Stratingh Institute for Chemistry, Faculty for Science and Engineering, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands.
| | - Wiktor Szymanski
- Centre for Systems Chemistry, Stratingh Institute for Chemistry, Faculty for Science and Engineering, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands.
- Department of Radiology, Medical Imaging Center, University of Groningen, University Medical Centre Groningen, Hanzeplein 1, 9713 GZ Groningen, The Netherlands
| | - Nadja A Simeth
- Centre for Systems Chemistry, Stratingh Institute for Chemistry, Faculty for Science and Engineering, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands.
- Institute for Organic and Biomolecular Chemistry, University of Göttingen, Tammannstr. 2, 37077 Göttingen, Germany
| | - Ben L Feringa
- Centre for Systems Chemistry, Stratingh Institute for Chemistry, Faculty for Science and Engineering, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands.
| |
Collapse
|
6
|
Babii O, Afonin S, Diel C, Huhn M, Dommermuth J, Schober T, Koniev S, Hrebonkin A, Nesterov‐Mueller A, Komarov IV, Ulrich AS. Diarylethene-Based Photoswitchable Inhibitors of Serine Proteases. Angew Chem Int Ed Engl 2021; 60:21789-21794. [PMID: 34268844 PMCID: PMC8519022 DOI: 10.1002/anie.202108847] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2021] [Indexed: 12/20/2022]
Abstract
A bicyclic peptide scaffold was chemically adapted to generate diarylethene-based photoswitchable inhibitors of serine protease Bos taurus trypsin 1 (T1). Starting from a prototype molecule-sunflower trypsin inhibitor-1 (SFTI-1)-we obtained light-controllable inhibitors of T1 with Ki in the low nanomolar range, whose activity could be modulated over 20-fold by irradiation. The inhibitory potency as well as resistance to proteolytic degradation were systematically studied on a series of 17 SFTI-1 analogues. The hydrogen bond network that stabilizes the structure of inhibitors and possibly the enzyme-inhibitor binding dynamics were affected by isomerization of the photoswitch. The feasibility of manipulating enzyme activity in time and space was demonstrated by controlled digestion of gelatin-based hydrogel and an antimicrobial peptide BP100-RW. Finally, our design principles of diarylethene photoswitches are shown to apply also for the development of other serine protease inhibitors.
Collapse
Affiliation(s)
- Oleg Babii
- Institute of Biological Interfaces (IBG-2)Karlsruhe Institute of Technology (KIT)POB 364076021KarlsruheGermany
- Institute of Microstructure Technology (IMT)KITHermann-von-Helmholtz-Platz 176344Eggenstein-LeopoldshafenGermany
| | - Sergii Afonin
- Institute of Biological Interfaces (IBG-2)Karlsruhe Institute of Technology (KIT)POB 364076021KarlsruheGermany
| | - Christian Diel
- Institute of Organic Chemistry (IOC)KITFritz-Haber-Weg 676131KarlsruheGermany
| | - Marcel Huhn
- Institute of Organic Chemistry (IOC)KITFritz-Haber-Weg 676131KarlsruheGermany
| | - Jennifer Dommermuth
- Institute of Organic Chemistry (IOC)KITFritz-Haber-Weg 676131KarlsruheGermany
| | - Tim Schober
- Institute of Organic Chemistry (IOC)KITFritz-Haber-Weg 676131KarlsruheGermany
- Lumobiotics GmbHAuer Straße 276227KarlsruheGermany
| | - Serhii Koniev
- Taras Shevchenko National University of Kyivvul. Volodymyrska 601601KyivUkraine
| | - Andrii Hrebonkin
- Institute of Biological Interfaces (IBG-2)Karlsruhe Institute of Technology (KIT)POB 364076021KarlsruheGermany
| | - Alexander Nesterov‐Mueller
- Institute of Microstructure Technology (IMT)KITHermann-von-Helmholtz-Platz 176344Eggenstein-LeopoldshafenGermany
| | - Igor V. Komarov
- Taras Shevchenko National University of Kyivvul. Volodymyrska 601601KyivUkraine
- Lumobiotics GmbHAuer Straße 276227KarlsruheGermany
| | - Anne S. Ulrich
- Institute of Biological Interfaces (IBG-2)Karlsruhe Institute of Technology (KIT)POB 364076021KarlsruheGermany
- Institute of Organic Chemistry (IOC)KITFritz-Haber-Weg 676131KarlsruheGermany
| |
Collapse
|
7
|
Babii O, Afonin S, Diel C, Huhn M, Dommermuth J, Schober T, Koniev S, Hrebonkin A, Nesterov‐Mueller A, Komarov IV, Ulrich AS. Diarylethen‐basierte lichtschaltbare Inhibitoren von Serinproteasen. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202108847] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Oleg Babii
- Institute of Biological Interfaces (IBG-2) Karlsruhe Institute of Technology (KIT) POB 3640 76021 Karlsruhe Deutschland
- Institute of Microstructure Technology (IMT) KIT Hermann-von-Helmholtz-Platz 1 76344 Eggenstein-Leopoldshafen Deutschland
| | - Sergii Afonin
- Institute of Biological Interfaces (IBG-2) Karlsruhe Institute of Technology (KIT) POB 3640 76021 Karlsruhe Deutschland
| | - Christian Diel
- Institute of Organic Chemistry (IOC) KIT Fritz-Haber-Weg 6 76131 Karlsruhe Deutschland
| | - Marcel Huhn
- Institute of Organic Chemistry (IOC) KIT Fritz-Haber-Weg 6 76131 Karlsruhe Deutschland
| | - Jennifer Dommermuth
- Institute of Organic Chemistry (IOC) KIT Fritz-Haber-Weg 6 76131 Karlsruhe Deutschland
| | - Tim Schober
- Institute of Organic Chemistry (IOC) KIT Fritz-Haber-Weg 6 76131 Karlsruhe Deutschland
- Lumobiotics GmbH Auer Straße 2 76227 Karlsruhe Deutschland
| | - Serhii Koniev
- Taras Shevchenko National University of Kyiv vul. Volodymyrska 60 1601 Kyiv Ukraine
| | - Andrii Hrebonkin
- Institute of Biological Interfaces (IBG-2) Karlsruhe Institute of Technology (KIT) POB 3640 76021 Karlsruhe Deutschland
| | - Alexander Nesterov‐Mueller
- Institute of Microstructure Technology (IMT) KIT Hermann-von-Helmholtz-Platz 1 76344 Eggenstein-Leopoldshafen Deutschland
| | - Igor V. Komarov
- Taras Shevchenko National University of Kyiv vul. Volodymyrska 60 1601 Kyiv Ukraine
- Lumobiotics GmbH Auer Straße 2 76227 Karlsruhe Deutschland
| | - Anne S. Ulrich
- Institute of Biological Interfaces (IBG-2) Karlsruhe Institute of Technology (KIT) POB 3640 76021 Karlsruhe Deutschland
- Institute of Organic Chemistry (IOC) KIT Fritz-Haber-Weg 6 76131 Karlsruhe Deutschland
| |
Collapse
|
8
|
Current Promising Therapeutic Targets for Aspergillosis Treatment. JOURNAL OF PURE AND APPLIED MICROBIOLOGY 2021. [DOI: 10.22207/jpam.15.2.09] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Aspergillosis is a fungal disease caused by different species of Aspergillus. They live in soil,dust and decomposed material. Number of Aspergillus species found till now is about 300 and more are still to be identified. Only few Aspergillus species can cause human disease and the most common species for human infection is Aspergillus fumigatus, which is a ubiquitous airborne saprophytic fungus. Severity of the disease ranges from an allergic response to life-threatening generalized infection. They grow optimally at 37°C and can grow upto 50°C. The fungal conidia are being constantly inhaled by humans and animals everyday normally gets eliminated by innate immune mechanism. Due to increasing number of immunocompromised patients, severe and fatal Aspergillosis cases have augmented. Currently, available antifungal drug for the treatment of Aspergillosis act on these three molecular target are 14 alpha demethylase for Azoles, ergosterol for Polyene and β-1,3-glucan synthase for Echinocandin. These antifungal drug show high resistance problem and toxicity. So, it is high time to develop new drugs for treatment with reduced toxicity and drug resistant problem. Synthesis of essential amino acid is absent in human as they obtain it from their diet but fungi synthesis these amino acid. Thus, enzymes in this pathway acts as novel drug target. This article summarizes promising drug targets presents in different metabolic pathway of Aspergillus genome and discusses their molecular functions in detail. This review also list down the inhibitors of these novel target. We present a comprehensive review that will pave way for discovery and development of novel antifungals against these drug targets for Aspergillosis treatment.
Collapse
|