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Cited by 502

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An Arabidopsis Cell Wall Proteoglycan Consists of Pectin and Arabinoxylan Covalently Linked to an Arabinogalactan Protein

Open access
Tan, Li, Eberhard, Stefan, Pattathil, Sivakumar, Warder, Clayton, Glushka, John, Yuan, Chunhua, Hao, Zhangying, Zhu, Xiang, Avci, Utku, Miller, Jeffrey S., Baldwin, David, Pham, Charles, Orlando, Ronald, Darvill, Alan, Hahn, Michael G., Kieliszewski, Marcia J., Mohnen, Debra·2013·The Plant Cell

Abstract

Plant cell walls are comprised largely of the polysaccharides cellulose, hemicellulose, and pectin, along with ∼10% protein and up to 40% lignin. These wall polymers interact covalently and noncovalently to form the functional cell wall. Characterized cross-links in the wall include covalent linkages between wall glycoprotein extensins between rhamnogalacturonan II monomer domains and between polysaccharides and lignin phenolic residues. Here, we show that two isoforms of a purified Arabidopsis thaliana arabinogalactan protein (AGP) encoded by hydroxyproline-rich glycoprotein family protein gene At3g45230 are covalently attached to wall matrix hemicellulosic and pectic polysaccharides, with rhamnogalacturonan I (RG I)/homogalacturonan linked to the rhamnosyl residue in the arabinogalactan (AG) of the AGP and with arabinoxylan attached to either a rhamnosyl residue in the RG I domain or directly to an arabinosyl residue in the AG glycan domain. The existence of this wall structure, named ARABINOXYLAN PECTIN ARABINOGALACTAN PROTEIN1 (APAP1), is contrary to prevailing cell wall models that depict separate protein, pectin, and hemicellulose polysaccharide networks. The modified sugar composition and increased extractability of pectin and xylan immunoreactive epitopes in apap1 mutant aerial biomass support a role for the APAP1 proteoglycan in plant wall architecture and function.

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Metadata

Authors
Tan, L., Eberhard, S., Pattathil, S., Warder, C., Glushka, J., Yuan, C., Hao, Z., Zhu, X., Avci, U., Miller, J. S., Baldwin, D., Pham, C., Orlando, R., Darvill, A., Hahn, M. G., Kieliszewski, M. J., & Mohnen, D.
Venue
The Plant Cell
Published
2013-01-01
Volume
25
Issue
1
Pages
270-287
ISSN
  • 1040-4651 (ISSN-L)
  • 1532-298X
OpenAlex
W2130242517
Cited by
502
References
62
FWCI
48.25
Type
journal article
Language
en
Open access
green

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CoChat. (2026). Citation check: An Arabidopsis Cell Wall Proteoglycan Consists of Pectin and Arabinoxylan Covalently Linked to an Arabinogalactan Protein. https://app.cochat.ai/papers/10.1105/tpc.112.107334
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Tan, L., Eberhard, S., Pattathil, S., Warder, C., Glushka, J., Yuan, C., Hao, Z., Zhu, X., Avci, U., Miller, J. S., Baldwin, D., Pham, C., Orlando, R., Darvill, A., Hahn, M. G., Kieliszewski, M. J., & Mohnen, D. (2013). An Arabidopsis Cell Wall Proteoglycan Consists of Pectin and Arabinoxylan Covalently Linked to an Arabinogalactan Protein. The Plant Cell. https://doi.org/10.1105/tpc.112.107334

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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).

Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.