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Title: Comparison and analysis of zinc and cobalt-based systems as catalytic entities for the hydration of carbon dioxide

Abstract

In nature, the zinc metalloenzyme carbonic anhydrase II (CAII) efficiently catalyzes the conversion of carbon dioxide (CO 2) to bicarbonate under physiological conditions. Efforts have been directed towards the development of small molecule mimetics that can facilitate this process and thus have a beneficial environmental impact, but these efforts have met very limited success. Herein, we undertook quantum mechanical calculations of four mimetics, 1,5,9-triazacyclododedacane, 1,4,7,10-tetraazacyclododedacane, tris(4,5-dimethyl-2-imidazolyl)phosphine, and tris(2-benzimidazolylmethyl)amine, in their complexed form either with the Zn 2+ or the Co 2+ ion and studied their reaction coordinate for CO 2 hydration. These calculations demonstrated that the ability of the complex to maintain a tetrahedral geometry and bind bicarbonate in a unidentate manner were vital for the hydration reaction to proceed favorably. Moreover, these calculations show that the catalytic activity of the examined zinc complexes was insensitive to coordination states for zinc, while coordination states above four were found to have an unfavorable effect on product release for the cobalt counterparts.

Authors:
 [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1]
  1. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1237575
Report Number(s):
LLNL-JRNL-589234
Journal ID: ISSN 1932-6203
Grant/Contract Number:  
AC52-07NA27344
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
PLoS ONE
Additional Journal Information:
Journal Volume: 8; Journal Issue: 6; Journal ID: ISSN 1932-6203
Publisher:
Public Library of Science
Country of Publication:
United States
Language:
English
Subject:
59 BASIC BIOLOGICAL SCIENCES; 37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; 29 ENERGY PLANNING, POLICY AND ECONOMY

Citation Formats

Lau, E. Y., Wong, S. E., Baker, S. E., Bearinger, J. P., Koziol, L., Valdez, C. A., Satcher, J. H., Aines, R. D., and Lightstone, F. C. Comparison and analysis of zinc and cobalt-based systems as catalytic entities for the hydration of carbon dioxide. United States: N. p., 2013. Web. doi:10.1371/journal.pone.0066187.
Lau, E. Y., Wong, S. E., Baker, S. E., Bearinger, J. P., Koziol, L., Valdez, C. A., Satcher, J. H., Aines, R. D., & Lightstone, F. C. Comparison and analysis of zinc and cobalt-based systems as catalytic entities for the hydration of carbon dioxide. United States. https://doi.org/10.1371/journal.pone.0066187
Lau, E. Y., Wong, S. E., Baker, S. E., Bearinger, J. P., Koziol, L., Valdez, C. A., Satcher, J. H., Aines, R. D., and Lightstone, F. C. Thu . "Comparison and analysis of zinc and cobalt-based systems as catalytic entities for the hydration of carbon dioxide". United States. https://doi.org/10.1371/journal.pone.0066187. https://www.osti.gov/servlets/purl/1237575.
@article{osti_1237575,
title = {Comparison and analysis of zinc and cobalt-based systems as catalytic entities for the hydration of carbon dioxide},
author = {Lau, E. Y. and Wong, S. E. and Baker, S. E. and Bearinger, J. P. and Koziol, L. and Valdez, C. A. and Satcher, J. H. and Aines, R. D. and Lightstone, F. C.},
abstractNote = {In nature, the zinc metalloenzyme carbonic anhydrase II (CAII) efficiently catalyzes the conversion of carbon dioxide (CO 2) to bicarbonate under physiological conditions. Efforts have been directed towards the development of small molecule mimetics that can facilitate this process and thus have a beneficial environmental impact, but these efforts have met very limited success. Herein, we undertook quantum mechanical calculations of four mimetics, 1,5,9-triazacyclododedacane, 1,4,7,10-tetraazacyclododedacane, tris(4,5-dimethyl-2-imidazolyl)phosphine, and tris(2-benzimidazolylmethyl)amine, in their complexed form either with the Zn 2+ or the Co 2+ ion and studied their reaction coordinate for CO 2 hydration. These calculations demonstrated that the ability of the complex to maintain a tetrahedral geometry and bind bicarbonate in a unidentate manner were vital for the hydration reaction to proceed favorably. Moreover, these calculations show that the catalytic activity of the examined zinc complexes was insensitive to coordination states for zinc, while coordination states above four were found to have an unfavorable effect on product release for the cobalt counterparts.},
doi = {10.1371/journal.pone.0066187},
url = {https://www.osti.gov/biblio/1237575}, journal = {PLoS ONE},
issn = {1932-6203},
number = 6,
volume = 8,
place = {United States},
year = {2013},
month = {6}
}

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Cited by: 5 works
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Works referenced in this record:

Kinetic and Spectroscopic Characterization of the Gamma-Carbonic Anhydrase from the Methanoarchaeon Methanosarcina thermophila
journal, October 1999


Hydration of carbon dioxide by carbonic anhydrase: internal protein transfer of zinc(2+)-bound bicarbonate
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The Archetype γ-Class Carbonic Anhydrase (Cam) Contains Iron When Synthesized in Vivo
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Hydrolytic catalysis and structural stabilization in a designed metalloprotein
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Climate Strategy with Co2 Capture from the Air
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Fabrication of Single Carbonic Anhydrase Nanogel against Denaturation and Aggregation at High Temperature
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    Works referencing / citing this record:

    Improving carbon capture from power plant emissions with zinc- and cobalt-based catalysts
    journal, January 2014


    Carbonic anhydrase mimics for enhanced CO 2 absorption in an amine-based capture solvent
    journal, January 2016