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Cited by 653

The DOI matches its Crossref record; 1 of the 1 references it cites were found in a registry or an index.

Trp-dependent auxin biosynthesis in Arabidopsis: involvement of cytochrome P450s CYP79B2 and CYP79B3

Open access
Zhao, Yunde, Hull, Anna K., Gupta, Neeru R., Goss, Kendrick A., Alonso, José, Ecker, Joseph R., Normanly, Jennifer, Chory, Joanne, Celenza, John L.·2002·Genes & Development

Abstract

The plant hormone auxin regulates many aspects of plant growth and development. Although several auxin biosynthetic pathways have been proposed, none of these pathways has been precisely defined at the molecular level. Here we provide in planta evidence that the two Arabidopsis cytochrome P450s, CYP79B2 and CYP79B3, which convert tryptophan (Trp) to indole-3-acetaldoxime (IAOx) in vitro, are critical enzymes in auxin biosynthesis in vivo. IAOx is thus implicated as an important intermediate in auxin biosynthesis. Plants overexpressing CYP79B2 contain elevated levels of free auxin and display auxin overproduction phenotypes. Conversely, cyp79B2 cyp79B3 double mutants have reduced levels of IAA and show growth defects consistent with partial auxin deficiency. Together with previous work on YUCCA, a flavin monooxygenase also implicated in IAOx production, and nitrilases that convert indole-3-acetonitrile to auxin, this work provides a framework for further dissecting auxin biosynthetic pathways and their regulation.

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Metadata

Authors
Zhao, Y., Hull, A. K., Gupta, N. R., Goss, K. A., Alonso, J., Ecker, J. R., Normanly, J., Chory, J., & Celenza, J. L.
Venue
Genes & Development
Published
2002-12-01
Volume
16
Issue
23
Pages
3100-3112
ISSN
  • 0890-9369 (ISSN-L)
  • 1549-5477
OpenAlex
W2170966566
Cited by
653
References
1
Type
posted content
Language
en
Open access
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CoChat. (2026). Citation check: Trp-dependent auxin biosynthesis in Arabidopsis: involvement of cytochrome P450s CYP79B2 and CYP79B3. https://app.cochat.ai/papers/10.1101/gad.1035402
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Zhao, Y., Hull, A. K., Gupta, N. R., Goss, K. A., Alonso, J., Ecker, J. R., Normanly, J., Chory, J., & Celenza, J. L. (2002). Trp-dependent auxin biosynthesis in Arabidopsis: involvement of cytochrome P450s CYP79B2 and CYP79B3. Genes & Development. https://doi.org/10.1101/gad.1035402

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