Changes in Cell Wall Properties Coincide with Overexpression of Extensin Fusion Proteins in Suspension Cultured Tobacco Cells
- Univ. of Georgia, Athens, GA (United States)
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Biosciences Division
- Ohio Univ., Athens, OH (United States)
- Ohio Univ., Athens, OH (United States); Suzhou Inst. of Nano-Tech and Nano-Bionics (SINANO), Suzhou (China)
Extensins are one subfamily of the cell wall hydroxyproline-rich glycoproteins, containing characteristic SerHyp4 glycosylation motifs and intermolecular cross-linking motifs such as the TyrXaaTyr sequence. Extensins are believed to form a cross-linked network in the plant cell wall through the tyrosine-derivatives isodityrosine, pulcherosine, and di-isodityrosine. Overexpression of three synthetic genes encoding different elastin-arabinogalactan protein-extensin hybrids in tobacco suspension cultured cells yielded novel cross-linking glycoproteins that shared features of the extensins, arabinogalactan proteins and elastin. The cell wall properties of the three transgenic cell lines were all changed, but in different ways. One transgenic cell line showed decreased cellulose crystallinity and increased wall xyloglucan content; the second transgenic cell line contained dramatically increased hydration capacity and notably increased cell wall biomass, increased di-isodityrosine, and increased protein content; the third transgenic cell line displayed wall phenotypes similar to wild type cells, except changed xyloglucan epitope extractability. These data indicate that overexpression of modified extensins may be a route to engineer plants for bioenergy and biomaterial production.
- Research Organization:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Biological and Environmental Research (BER)
- Grant/Contract Number:
- PS02-06ER6430; MCB- 9874744; 526-HF02; AC05-00OR22725
- OSTI ID:
- 1260605
- Alternate ID(s):
- OSTI ID: 1265756
- Journal Information:
- PLoS ONE, Vol. 9, Issue 12; ISSN 1932-6203
- Publisher:
- Public Library of ScienceCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Engineering hydroxyproline‐ O ‐glycosylated biopolymers to reconstruct the plant cell wall for improved biomass processability
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journal | January 2020 |
Changes of cell wall components during embryogenesis of Castanea mollissima
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journal | February 2020 |
Ectopic expression of a novel OsExtensin-like gene consistently enhances plant lodging resistance by regulating cell elongation and cell wall thickening in rice
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journal | July 2017 |
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