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Title: Structural and dynamical description of the enzymatic reaction of a phosphohexomutase

Abstract

Enzymes are known to adopt various conformations at different points along their catalytic cycles. Here, we present a comprehensive analysis of 15 isomorphous, high resolution crystal structures of the enzyme phosphoglucomutase from the bacterium Xanthomonas citri. The protein was captured in distinct states critical to function, including enzyme-substrate, enzyme-product, and enzyme-intermediate complexes. Key residues in ligand recognition and regions undergoing conformational change are identified and correlated with the various steps of the catalytic reaction. In addition, we use principal component analysis to examine various subsets of these structures with two goals: (1) identifying sites of conformational heterogeneity through a comparison of room temperature and cryogenic structures of the apo-enzyme and (2) a priori clustering of the enzyme-ligand complexes into functionally related groups, showing sensitivity of this method to structural features difficult to detect by traditional methods. This study captures, in a single system, the structural basis of diverse substrate recognition, the subtle impact of covalent modification, and the role of ligand-induced conformational change in this representative enzyme of the α-D-phosphohexomutase superfamily.

Authors:
ORCiD logo [1];  [1];  [2]; ORCiD logo [2]; ORCiD logo [3]; ORCiD logo [1]
  1. Univ. of Missouri, Columbia, MO (United States)
  2. Dalhousie Univ., Halifax, NS (Canada)
  3. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Advanced Light Source (ALS)
Publication Date:
Research Org.:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES); National Institutes of Health (NIH); National Science Foundation (NSF)
OSTI Identifier:
1619116
Alternate Identifier(s):
OSTI ID: 1504500
Grant/Contract Number:  
AC02-05CH11231; T32 GM008396-26; MCB-0918389; P30 GM124169-01
Resource Type:
Accepted Manuscript
Journal Name:
Structural Dynamics
Additional Journal Information:
Journal Volume: 6; Journal Issue: 2; Journal ID: ISSN 2329-7778
Publisher:
American Crystallographic Association/AIP
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY

Citation Formats

Stiers, Kyle M., Graham, Abigail C., Zhu, Jian-She, Jakeman, David L., Nix, Jay C., and Beamer, Lesa J. Structural and dynamical description of the enzymatic reaction of a phosphohexomutase. United States: N. p., 2019. Web. doi:10.1063/1.5092803.
Stiers, Kyle M., Graham, Abigail C., Zhu, Jian-She, Jakeman, David L., Nix, Jay C., & Beamer, Lesa J. Structural and dynamical description of the enzymatic reaction of a phosphohexomutase. United States. https://doi.org/10.1063/1.5092803
Stiers, Kyle M., Graham, Abigail C., Zhu, Jian-She, Jakeman, David L., Nix, Jay C., and Beamer, Lesa J. Mon . "Structural and dynamical description of the enzymatic reaction of a phosphohexomutase". United States. https://doi.org/10.1063/1.5092803. https://www.osti.gov/servlets/purl/1619116.
@article{osti_1619116,
title = {Structural and dynamical description of the enzymatic reaction of a phosphohexomutase},
author = {Stiers, Kyle M. and Graham, Abigail C. and Zhu, Jian-She and Jakeman, David L. and Nix, Jay C. and Beamer, Lesa J.},
abstractNote = {Enzymes are known to adopt various conformations at different points along their catalytic cycles. Here, we present a comprehensive analysis of 15 isomorphous, high resolution crystal structures of the enzyme phosphoglucomutase from the bacterium Xanthomonas citri. The protein was captured in distinct states critical to function, including enzyme-substrate, enzyme-product, and enzyme-intermediate complexes. Key residues in ligand recognition and regions undergoing conformational change are identified and correlated with the various steps of the catalytic reaction. In addition, we use principal component analysis to examine various subsets of these structures with two goals: (1) identifying sites of conformational heterogeneity through a comparison of room temperature and cryogenic structures of the apo-enzyme and (2) a priori clustering of the enzyme-ligand complexes into functionally related groups, showing sensitivity of this method to structural features difficult to detect by traditional methods. This study captures, in a single system, the structural basis of diverse substrate recognition, the subtle impact of covalent modification, and the role of ligand-induced conformational change in this representative enzyme of the α-D-phosphohexomutase superfamily.},
doi = {10.1063/1.5092803},
journal = {Structural Dynamics},
number = 2,
volume = 6,
place = {United States},
year = {Mon Apr 01 00:00:00 EDT 2019},
month = {Mon Apr 01 00:00:00 EDT 2019}
}

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Cited by: 6 works
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Figures / Tables:

FIG. 1 FIG. 1: Overview of the mechanism and structure of XcPGM. (a) A schematic of the catalytic reaction, showing the reversible conversion of glucose 1-phosphate to glucose 6-phosphate. Glucose 1,6-bisphosphate undergoes a 180° reorientation in between the two phosphoryl transfer steps of the reaction. (b) An outline of the catalytic cyclemore » of XcPGM, highlighting the various enzyme states captured in this study. Structure numbers correspond to those on Table I. Structures not part of the normal catalytic cycle are labeled as “nonproductive” and highlighted by gray boxes. Structures previously determined in another study are analogous to 1, 3, and 11. *Room-temperature data set collected; complex with a nonhydrolysable G1P analog (see the text).« less

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Works referencing / citing this record:

Structural basis for substrate and product recognition in human phosphoglucomutase-1 (PGM1) isoform 2, a member of the α-d-phosphohexomutase superfamily
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Mix-and-inject XFEL crystallography reveals gated conformational dynamics during enzyme catalysis
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