3BWN

L-tryptophan aminotransferase


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.25 Å
  • R-Value Free: 0.253 
  • R-Value Work: 0.224 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Rapid synthesis of auxin via a new tryptophan-dependent pathway is required for shade avoidance in plants

Tao, Y.Ferrer, J.L.Ljung, K.Pojer, F.Hong, F.Long, J.A.Li, L.Moreno, J.E.Bowman, M.E.Ivans, L.J.Cheng, Y.Lim, J.Zhao, Y.Ballare, C.L.Sandberg, G.Noel, J.P.Chory, J.

(2008) Cell 133: 164-176

  • DOI: 10.1016/j.cell.2008.01.049

  • PubMed Abstract: 
  • 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 t ...

    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.


    Related Citations: 
    • Structural basis for entry of L-TRP into pathway for auxin biosynthesis
      Ferrer, J.-L.,Tao, Y.,Pojer, F.,Bowman, M.E.,Chory, J.,Noel, J.P.
      () TO BE PUBLISHED --: --


    Organizational Affiliation

    Howard Hughes Medical Institute, The Salk Institute for Biological Studies, La Jolla, CA 92037, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
L-tryptophan aminotransferase
A, B, D, E, F
391Arabidopsis thalianaMutation(s): 0 
Gene Names: TAA1 (CKRC1, SAV3, TIR2, WEI8)
EC: 2.6.1.27, 2.6.1.99
Find proteins for Q9S7N2 (Arabidopsis thaliana)
Go to UniProtKB:  Q9S7N2
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
L-tryptophan aminotransferase
C
391Arabidopsis thalianaMutation(s): 0 
Gene Names: TAA1 (CKRC1, SAV3, TIR2, WEI8)
EC: 2.6.1.27, 2.6.1.99
Find proteins for Q9S7N2 (Arabidopsis thaliana)
Go to UniProtKB:  Q9S7N2
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
PO4
Query on PO4

Download SDF File 
Download CCD File 
E
PHOSPHATE ION
O4 P
NBIIXXVUZAFLBC-UHFFFAOYSA-K
 Ligand Interaction
PHE
Query on PHE

Download SDF File 
Download CCD File 
F
PHENYLALANINE
C9 H11 N O2
COLNVLDHVKWLRT-QMMMGPOBSA-N
 Ligand Interaction
PMP
Query on PMP

Download SDF File 
Download CCD File 
A, B, D, F
4'-DEOXY-4'-AMINOPYRIDOXAL-5'-PHOSPHATE
PYRIDOXAMINE-5'-PHOSPHATE
C8 H13 N2 O5 P
ZMJGSOSNSPKHNH-UHFFFAOYSA-N
 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
LLP
Query on LLP
C
L-PEPTIDE LINKINGC14 H22 N3 O7 PLYS
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.25 Å
  • R-Value Free: 0.253 
  • R-Value Work: 0.224 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 93.410α = 90.00
b = 97.830β = 104.35
c = 139.460γ = 90.00
Software Package:
Software NamePurpose
XDSdata reduction
XSCALEdata scaling
REFMACrefinement
Blu-Icedata collection

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2008-04-29
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance