Alternative splicing of the auxin biosynthesis gene YUCCA4 determines its subcellular compartmentation

KRIECHBAUMER, Verena, WANG, Pengwei, HAWES, Chris and ABELL, Benjamin (2012). Alternative splicing of the auxin biosynthesis gene YUCCA4 determines its subcellular compartmentation. The Plant Journal, 70 (2), 292-302.

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Auxin is a major growth hormone in plants, and recent studies have elucidated many of the molecular mechanisms underlying its action, including transport, perception and signal transduction. However, major gaps remain in our knowledge of auxin biosynthetic control, partly due to the complexity and probable redundancy of multiple pathways that involve the YUCCA family of flavin-dependent mono-oxygenases. This study reveals the differential localization of YUCCA4 alternative splice variants to the endoplasmic reticulum and the cytosol, which depends on tissue-specific splicing. One isoform is restricted to flowers, and is anchored to the cytosolic face of the endoplasmic reticulum membrane via a hydrophobic C-terminal transmembrane domain. The other isoform is present in all tissues and is distributed throughout the cytosol. These findings are consistent with previous observations of yucca4 phenotypes in flowers, and suggest a role for intracellular compartmentation in auxin biosynthesis.

Item Type: Article
Research Institute, Centre or Group - Does NOT include content added after October 2018: Biomedical Research Centre
Identification Number:
Page Range: 292-302
Depositing User: Rebecca Jones
Date Deposited: 01 Mar 2012 09:48
Last Modified: 18 Mar 2021 20:30

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