Skip to main content
U.S. Department of Energy
Office of Scientific and Technical Information

Allosteric inhibitors of Mycobacterium tuberculosis tryptophan synthase

Journal Article · · Protein Science
DOI:https://doi.org/10.1002/pro.3825· OSTI ID:1632153
 [1];  [1];  [2];  [2];  [3];  [4];  [5];  [5];  [5];  [1]
  1. Univ. of Chicago, IL (United States); Argonne National Lab. (ANL), Argonne, IL (United States)
  2. Univ. of Chicago, IL (United States)
  3. Colorado State Univ., Fort Collins, CO (United States)
  4. Eisai Co. Ltd., Cambridge, MA (United States)
  5. Broad Inst.of MIT and Harvard, Cambridge MA (United States)
Global dispersion of multidrug resistant bacteria is very common and evolution of antibiotic-resistance is occurring at an alarming rate, presenting a formidable challenge for humanity. The development of new therapeuthics with novel molecular targets is urgently needed. Current drugs primarily affect protein, nucleic acid, and cell wall synthesis. Metabolic pathways, including those involved in amino acid biosynthesis, have recently sparked interest in the drug discovery community as potential reservoirs of such novel targets. Tryptophan biosynthesis, utilized by bacteria but absent in humans, represents one of the currently studied processes with a therapeutic focus. It has been shown that tryptophan synthase (TrpAB) is required for survival of Mycobacterium tuberculosis in macrophages and for evading host defense, and therefore is a promising drug target. In this paper we present crystal structures of TrpAB with two allosteric inhibitors of M. tuberculosis tryptophan synthase that belong to sulfolane and indole-5-sulfonamide chemical scaffolds. We compare our results with previously reported structural and biochemical studies of another, azetidine-containing M. tuberculosis tryptophan synthase inhibitor. This work shows how structurally distinct ligands can occupy the same allosteric site and make specific interactions. It also highlights the potential benefit of targeting more variable allosteric sites of important metabolic enzymes.
Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Organization:
National Institutes of Health (NIH); USDOE Office of Science (SC), Biological and Environmental Research (BER)
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
1632153
Alternate ID(s):
OSTI ID: 1592520
Journal Information:
Protein Science, Journal Name: Protein Science Journal Issue: 3 Vol. 29; ISSN 0961-8368
Publisher:
The Protein SocietyCopyright Statement
Country of Publication:
United States
Language:
English

References (42)

Tryptophan synthase: a mine for enzymologists journal April 2009
Enhanced crystal packing due to solvent reorganization through reductive methylation of lysine residues in oxidoreductase from Streptococcus pneumoniae journal February 2010
Structural and kinetic analysis of a channel-impaired mutant of tryptophan synthase. journal October 1994
Enzymatic properties of mutant Escherichia coli tryptophan synthase alpha-subunits. journal October 1991
HINT predictive analysis of binding between retinol binding protein and hydrophobic ligands journal September 2000
The molecular pathway for the allosteric regulation of tryptophan synthase journal April 2003
Allosteric regulation of substrate channeling and catalysis in the tryptophan synthase bienzyme complex journal March 2012
Allosteric communication between alpha and beta subunits of tryptophan synthase: Modelling the open-closed transition of the alpha subunit journal June 2006
Visualizing the tunnel in tryptophan synthase with crystallography: Insights into a selective filter for accommodating indole and rejecting water journal March 2016
Tryptophan Biosynthesis Protects Mycobacteria from CD4 T-Cell-Mediated Killing journal December 2013
Evolution of bacterial trp operons and their regulation journal April 2008
Enzyme targets for drug design of new anti-virulence therapeutics journal December 2018
Intrinsic dynamics is evolutionarily optimized to enable allosteric behavior journal June 2020
Tryptophan synthase: the workings of a channeling nanomachine journal June 2008
Allostery and Substrate Channeling in the Tryptophan Synthase Bienzyme Complex: Evidence for Two Subunit Conformations and Four Quaternary States journal September 2013
Synthesis and Characterization of Allosteric Probes of Substrate Channeling in the Tryptophan Synthase Bienzyme Complex , journal July 2007
Allosteric Regulation of Substrate Channeling in Tryptophan Synthase:  Modulation of the l -Serine Reaction in Stage I of the β-Reaction by α-Site Ligands , journal July 2007
βQ114N and βT110V Mutations Reveal a Critically Important Role of the Substrate α-Carboxylate Site in the Reaction Specificity of Tryptophan Synthase journal December 2007
Exchange of K + or Cs + for Na + Induces Local and Long-Range Changes in the Three-Dimensional Structure of the Tryptophan Synthase α 2 β 2 Complex journal January 1996
Mutations in the Contact Region between the α and β Subunits of Tryptophan Synthase Alter Subunit Interaction and Intersubunit Communication journal March 1998
Loop Closure and Intersubunit Communication in Tryptophan Synthase , journal April 1998
Crystal Structure of Wild-Type Tryptophan Synthase Complexed with the Natural Substrate Indole-3-glycerol Phosphate journal December 1999
A small-molecule allosteric inhibitor of Mycobacterium tuberculosis tryptophan synthase journal July 2017
The oligomeric structures of plant cryptochromes journal May 2020
Inhibiting mycobacterial tryptophan synthase by targeting the inter-subunit interface journal August 2017
Metabolic efficiency and amino acid composition in the proteomes of Escherichia coli and Bacillus subtilis journal March 2002
Directed evolution of the tryptophan synthase β-subunit for stand-alone function recapitulates allosteric activation journal November 2015
MOLPROBITY: structure validation and all-atom contact analysis for nucleic acids and their complexes journal July 2004
Three‐dimensional Domain Swapping in the α Subunit of Tryptophan Synthase journal April 2015
On the treatment of negative intensity observations journal July 1978
A statistic for local intensity differences: robustness to anisotropy and pseudo-centering and utility for detecting twinning journal June 2003
Coot model-building tools for molecular graphics journal November 2004
HKL -3000: the integration of data reduction and structure solution – from diffraction images to an initial model in minutes journal July 2006
Overview of the CCP 4 suite and current developments journal March 2011
Conservation of the structure and function of bacterial tryptophan synthases journal May 2019
Feast or famine: the host-pathogen battle over amino acids: Host-pathogen battle over amino acids journal April 2013
Linking Crystallographic Model and Data Quality journal May 2012
Indoleamine 2,3-Dioxygenase 1 Is a Lung-Specific Innate Immune Defense Mechanism That Inhibits Growth of Francisella tularensis Tryptophan Auxotrophs journal April 2010
Polymorphisms in Chlamydia trachomatis tryptophan synthase genes differentiate between genital and ocular isolates journal June 2003
(NZ)CH...O Contacts assist crystallization of a ParB-like nuclease journal January 2007
Overview of the CCP4 suite and current developments. text January 2011
Chlamydia exploit the mammalian tryptophan-depletion defense strategy as a counter-defensive cue to trigger a survival state of persistence journal January 2014

Similar Records

A small-molecule allosteric inhibitor of Mycobacterium tuberculosis tryptophan synthase
Journal Article · Mon Jul 03 00:00:00 EDT 2017 · Nature Chemical Biology · OSTI ID:1377916

A small-molecule allosteric inhibitor of Mycobacterium tuberculosis tryptophan synthase
Journal Article · Mon Jul 03 00:00:00 EDT 2017 · Nature Chemical Biology · OSTI ID:1389281

Structural Insight into Allosteric Inhibition of Mycobacterium tuberculosis Tryptophan Synthase
Journal Article · Tue Oct 02 20:00:00 EDT 2018 · FASEB Journal · OSTI ID:1787050