Enzymes and other agents that enhance cell wall extensibility

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Abstract

Polysaccharides and proteins are secreted to the inner surface of the growing cell wall, where they assemble into a network that is mechanically strong, yet remains extensible until the cells cease growth. This review focuses on the agents that directly or indirectly enhance the extensibility properties of growing walls. The properties of expansins, endoglucanases, and xyloglucan transglycosylases are reviewed and their postulated roles in modulating wall extensibility are evaluated. A summary model for wall extension is presented, in which expansin is a primary agent of wall extension, whereas endoglucanases, xyloglucan endotransglycosylase, and other enzymes that alter wall structure act secondarily to modulate expansin action.

Original languageEnglish (US)
Pages (from-to)391-417
Number of pages27
JournalAnnual Review of Plant Biology
Volume50
DOIs
StatePublished - 1999

All Science Journal Classification (ASJC) codes

  • Physiology
  • Molecular Biology
  • Plant Science
  • Cell Biology

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