The structure of the catalytic domain of a plant cellulose synthase and its assembly into dimers
Abstract
Cellulose microfibrils are para-crystalline arrays of several dozen linear (1→4)-β-d-glucan chains synthesized at the surface of the cell membrane by large, multimeric complexes of synthase proteins. Recombinant catalytic domains of rice (Oryza sativa) CesA8 cellulose synthase form dimers reversibly as the fundamental scaffold units of architecture in the synthase complex. Specificity of binding to UDP and UDP-Glc indicates a properly folded protein, and binding kinetics indicate that each monomer independently synthesizes single glucan chains of cellulose, i.e., two chains per dimer pair. In contrast to structure modeling predictions, solution x-ray scattering studies demonstrate that the monomer is a two-domain, elongated structure, with the smaller domain coupling two monomers into a dimer. The catalytic core of the monomer is accommodated only near its center, with the plant-specific sequences occupying the small domain and an extension distal to the catalytic domain. This configuration is in stark contrast to the domain organization obtained in predicted structures of plant CesA. As a result, the arrangement of the catalytic domain within the CesA monomer and dimer provides a foundation for constructing structural models of the synthase complex and defining the relationship between the rosette structure and the cellulose microfibrils they synthesize.
- Authors:
-
- Purdue Univ., West Lafayette, IN (United States)
- Northeastern Univ., Boston, MA (United States)
- National Renewable Energy Lab. (NREL), Golden, CO (United States)
- DeltaG Technologies, San Diego, CA (United States)
- Publication Date:
- Research Org.:
- National Renewable Energy Laboratory (NREL), Golden, CO (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1242477
- Report Number(s):
- NREL/JA-2700-63047
Journal ID: ISSN 1040-4651
- Grant/Contract Number:
- AC36-08GO28308
- Resource Type:
- Accepted Manuscript
- Journal Name:
- The Plant Cell
- Additional Journal Information:
- Journal Volume: 26; Journal Issue: 7; Related Information: Plant Cell; Journal ID: ISSN 1040-4651
- Publisher:
- American Society of Plant Biologists
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 09 BIOMASS FUELS; 59 BASIC BIOLOGICAL SCIENCES; plant cellulose synthase; dimer
Citation Formats
Olek, Anna T., Rayon, Catherine, Makowski, Lee, Kim, Hyung Rae, Ciesielski, Peter, Badger, John, Paul, Lake N., Ghosh, Subhangi, Kihara, Daisuke, Crowley, Michael, Himmel, Michael E., Bolin, Jeffrey T., and Carpita, Nicholas C. The structure of the catalytic domain of a plant cellulose synthase and its assembly into dimers. United States: N. p., 2014.
Web. doi:10.1105/tpc.114.126862.
Olek, Anna T., Rayon, Catherine, Makowski, Lee, Kim, Hyung Rae, Ciesielski, Peter, Badger, John, Paul, Lake N., Ghosh, Subhangi, Kihara, Daisuke, Crowley, Michael, Himmel, Michael E., Bolin, Jeffrey T., & Carpita, Nicholas C. The structure of the catalytic domain of a plant cellulose synthase and its assembly into dimers. United States. https://doi.org/10.1105/tpc.114.126862
Olek, Anna T., Rayon, Catherine, Makowski, Lee, Kim, Hyung Rae, Ciesielski, Peter, Badger, John, Paul, Lake N., Ghosh, Subhangi, Kihara, Daisuke, Crowley, Michael, Himmel, Michael E., Bolin, Jeffrey T., and Carpita, Nicholas C. Thu .
"The structure of the catalytic domain of a plant cellulose synthase and its assembly into dimers". United States. https://doi.org/10.1105/tpc.114.126862. https://www.osti.gov/servlets/purl/1242477.
@article{osti_1242477,
title = {The structure of the catalytic domain of a plant cellulose synthase and its assembly into dimers},
author = {Olek, Anna T. and Rayon, Catherine and Makowski, Lee and Kim, Hyung Rae and Ciesielski, Peter and Badger, John and Paul, Lake N. and Ghosh, Subhangi and Kihara, Daisuke and Crowley, Michael and Himmel, Michael E. and Bolin, Jeffrey T. and Carpita, Nicholas C.},
abstractNote = {Cellulose microfibrils are para-crystalline arrays of several dozen linear (1→4)-β-d-glucan chains synthesized at the surface of the cell membrane by large, multimeric complexes of synthase proteins. Recombinant catalytic domains of rice (Oryza sativa) CesA8 cellulose synthase form dimers reversibly as the fundamental scaffold units of architecture in the synthase complex. Specificity of binding to UDP and UDP-Glc indicates a properly folded protein, and binding kinetics indicate that each monomer independently synthesizes single glucan chains of cellulose, i.e., two chains per dimer pair. In contrast to structure modeling predictions, solution x-ray scattering studies demonstrate that the monomer is a two-domain, elongated structure, with the smaller domain coupling two monomers into a dimer. The catalytic core of the monomer is accommodated only near its center, with the plant-specific sequences occupying the small domain and an extension distal to the catalytic domain. This configuration is in stark contrast to the domain organization obtained in predicted structures of plant CesA. As a result, the arrangement of the catalytic domain within the CesA monomer and dimer provides a foundation for constructing structural models of the synthase complex and defining the relationship between the rosette structure and the cellulose microfibrils they synthesize.},
doi = {10.1105/tpc.114.126862},
journal = {The Plant Cell},
number = 7,
volume = 26,
place = {United States},
year = {Thu Jul 10 00:00:00 EDT 2014},
month = {Thu Jul 10 00:00:00 EDT 2014}
}
Web of Science
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