3bwn

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{{STRUCTURE_3bwn| PDB=3bwn | SCENE= }}
{{STRUCTURE_3bwn| PDB=3bwn | SCENE= }}
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'''L-tryptophan aminotransferase'''
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===L-tryptophan aminotransferase===
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==Overview==
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Plants grown at high densities perceive a decrease in the red to far-red (R:FR) ratio of incoming light, resulting from absorption of red light by canopy leaves and reflection of far-red light from neighboring plants. These changes in light quality trigger a series of responses known collectively as the shade avoidance syndrome. During shade avoidance, stems elongate at the expense of leaf and storage organ expansion, branching is inhibited, and flowering is accelerated. We identified several loci in Arabidopsis, mutations in which lead to plants defective in multiple shade avoidance responses. Here we describe TAA1, an aminotransferase, and show that TAA1 catalyzes the formation of indole-3-pyruvic acid (IPA) from L-tryptophan (L-Trp), the first step in a previously proposed, but uncharacterized, auxin biosynthetic pathway. This pathway is rapidly deployed to synthesize auxin at the high levels required to initiate the multiple changes in body plan associated with shade avoidance.
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{{ABSTRACT_PUBMED_18394996}}
==About this Structure==
==About this Structure==
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[[Category: Pyridoxal-5'-phosphate]]
[[Category: Pyridoxal-5'-phosphate]]
[[Category: Tryptophan]]
[[Category: Tryptophan]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Mon Jul 28 05:43:25 2008''

Revision as of 02:43, 28 July 2008

Image:3bwn.png

Template:STRUCTURE 3bwn

L-tryptophan aminotransferase

Template:ABSTRACT PUBMED 18394996

About this Structure

3BWN is a Single protein structure of sequence from Arabidopsis thaliana. Full crystallographic information is available from OCA.

Reference

Rapid synthesis of auxin via a new tryptophan-dependent pathway is required for shade avoidance in plants., Tao Y, Ferrer JL, Ljung K, Pojer F, Hong F, Long JA, Li L, Moreno JE, Bowman ME, Ivans LJ, Cheng Y, Lim J, Zhao Y, Ballare CL, Sandberg G, Noel JP, Chory J, Cell. 2008 Apr 4;133(1):164-76. PMID:18394996

Page seeded by OCA on Mon Jul 28 05:43:25 2008

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