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 
  • R-Value Observed: 0.225 

wwPDB Validation   3D Report Full Report


Ligand Structure Quality Assessment 


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
  • Primary Citation of Related Structures:  
    3BWN

  • 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 trigger a series of responses known collectively as the shade avoidance syndrome ...

    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:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
L-tryptophan aminotransferaseA, B, D, E, F391Arabidopsis thalianaMutation(s): 0 
Gene Names: At1g70560/F5A18_26F5A18.26TAA1CKRC1SAV3TIR2WEI8At1g70560F24J13.13
EC: 2.6.1.27 (UniProt), 2.6.1.99 (UniProt)
UniProt
Find proteins for Q9S7N2 (Arabidopsis thaliana)
Explore Q9S7N2 
Go to UniProtKB:  Q9S7N2
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
L-tryptophan aminotransferaseC391Arabidopsis thalianaMutation(s): 0 
Gene Names: At1g70560/F5A18_26F5A18.26TAA1CKRC1SAV3TIR2WEI8At1g70560F24J13.13
EC: 2.6.1.27 (UniProt), 2.6.1.99 (UniProt)
UniProt
Find proteins for Q9S7N2 (Arabidopsis thaliana)
Explore Q9S7N2 
Go to UniProtKB:  Q9S7N2
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
PMP (Subject of Investigation/LOI)
Query on PMP

Download Ideal Coordinates CCD File 
G [auth A], H [auth B], I [auth D], K [auth F]4'-DEOXY-4'-AMINOPYRIDOXAL-5'-PHOSPHATE
C8 H13 N2 O5 P
ZMJGSOSNSPKHNH-UHFFFAOYSA-N
 Ligand Interaction
PHE (Subject of Investigation/LOI)
Query on PHE

Download Ideal Coordinates CCD File 
L [auth F]PHENYLALANINE
C9 H11 N O2
COLNVLDHVKWLRT-QMMMGPOBSA-N
 Ligand Interaction
PO4
Query on PO4

Download Ideal Coordinates CCD File 
J [auth E]PHOSPHATE ION
O4 P
NBIIXXVUZAFLBC-UHFFFAOYSA-K
 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
LLP
Query on LLP
CL-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 
  • R-Value Observed: 0.225 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 93.41α = 90
b = 97.83β = 104.35
c = 139.46γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
Blu-Icedata collection
XDSdata reduction
XSCALEdata scaling

Structure Validation

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Ligand Structure Quality Assessment  



Entry History 

Deposition Data

Revision History  (Full details and data files)

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