1WKP

Flowering locus t (ft) from arabidopsis thaliana


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.60 Å
  • R-Value Free: 0.226 
  • R-Value Work: 0.181 
  • R-Value Observed: 0.184 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

A divergent external loop confers antagonistic activity on floral regulators FT and TFL1.

Ahn, J.H.Miller, D.Winter, V.J.Banfield, M.J.Lee, J.H.Yoo, S.Y.Henz, S.R.Brady, R.L.Weigel, D.

(2006) EMBO J 25: 605-614

  • DOI: 10.1038/sj.emboj.7600950
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • The Arabidopsis genes FT and TERMINAL FLOWER1 (TFL1) encode related proteins with similarity to human Raf kinase inhibitor protein. FT, and likely also TFL1, is recruited to the promoters of floral genes through interaction with FD, a bZIP transcript ...

    The Arabidopsis genes FT and TERMINAL FLOWER1 (TFL1) encode related proteins with similarity to human Raf kinase inhibitor protein. FT, and likely also TFL1, is recruited to the promoters of floral genes through interaction with FD, a bZIP transcription factor. FT, however, induces flowering, while TFL1 represses flowering. Residues responsible for the opposite activities of FT and TFL1 were mapped by examining plants that overexpress chimeric proteins. A region important in vivo localizes to a 14-amino-acid segment that evolves very rapidly in TFL1 orthologs, but is almost invariant in FT orthologs. Crystal structures show that this segment forms an external loop of variable conformation. The only residue unambiguously distinguishing the FT and TFL1 loops makes a hydrogen bond with a residue near the entrance of a potential ligand-binding pocket in TFL1, but not in FT. This pocket is contacted by a C-terminal peptide, which also contributes to the opposite FT and TFL1 activities. In combination, these results identify a molecular surface likely to be recognized by FT- and/or TFL1-specific interactors.


    Organizational Affiliation

    Plant Biology Laboratory, The Salk Institute for Biological Studies, La Jolla, CA, USA.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
FLOWERING LOCUS T protein
A, B, C, D
171Arabidopsis thalianaMutation(s): 3 
Gene Names: FTAt1g65480F5I14.3
Find proteins for Q9SXZ2 (Arabidopsis thaliana)
Go to UniProtKB:  Q9SXZ2
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download CCD File 
A, B
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.60 Å
  • R-Value Free: 0.226 
  • R-Value Work: 0.181 
  • R-Value Observed: 0.184 
  • Space Group: P 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 53.973α = 75.15
b = 61.542β = 72.18
c = 66.841γ = 70.55
Software Package:
Software NamePurpose
REFMACrefinement
DENZOdata reduction
SCALEPACKdata scaling
AMoREphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2005-06-28
    Type: Initial release
  • Version 1.1: 2008-04-30
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Advisory, Version format compliance