1XJ5

X-RAY STRUCTURE OF SPERMIDINE SYNTHASE FROM ARABIDOPSIS THALIANA GENE AT1G23820

• PDB DOI: https://doi.org/10.2210/pdb1XJ5/pdb

• Classification: TRANSFERASE
• Organism(s): Arabidopsis thaliana
• Expression System: Escherichia coli
• Mutation(s): Yes 


• Deposited: 2004-09-22 Released: 2004-10-05 
• Deposition Author(s): Wesenberg, G.E., Smith, D.W., Phillips Jr., G.N., Bitto, E., Bingman, C.A., Allard, S.T.M., Center for Eukaryotic Structural Genomics (CESG)

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.70 Å
• R-Value Free: 0.245 
• R-Value Work: 0.188 

Starting Model: experimental

Re-refinement Note

A newer entry is available that reflects an alternative modeling of the original data: 2Q41

Literature

X-RAY STRUCTURE OF SPERMIDINE SYNTHASE FROM ARABIDOPSIS THALIANA GENE AT1G23820

Center for Eukaryotic Structural Genomics

To be published.

Biological Assembly 1  

Global Symmetry: Cyclic - C2  (Explore in 3D)
Global Stoichiometry: Homo 4-mer - A4 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 147.69 kDa 
• Atom Count: 9,440 
• Modelled Residue Count: 1,150 
• Deposited Residue Count: 1,336 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Spermidine synthase 1	A, B, C, D	334	Arabidopsis thaliana	Mutation(s): 8  Gene Names: AT1G23820 EC: 2.5.1.16
UniProt
Find proteins for Q9ZUB3 (Arabidopsis thaliana) Explore Q9ZUB3  Go to UniProtKB:  Q9ZUB3

Small Molecules

Modified Residues  1 Unique
ID	Chains	Type	Formula	2D Diagram	Parent
MSE	A, B, C, D	L-PEPTIDE LINKING	C5 H11 N O2 Se		MET

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.70 Å
• R-Value Free: 0.245 
• R-Value Work: 0.188 
• Space Group: P 1 2₁ 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 88.814	α = 90
b = 95.207	β = 104.96
c = 89.164	γ = 90

Software Package:

Software Name	Purpose
DENZO	data reduction
SCALEPACK	data scaling
CNS	phasing
RESOLVE	phasing
MOLREP	phasing
CNS	refinement
PHENIX	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 2004-10-05 
Deposition Author(s): Wesenberg, G.E., Smith, D.W., Phillips Jr., G.N., Bitto, E., Bingman, C.A., Allard, S.T.M., Center for Eukaryotic Structural Genomics (CESG)

Revision History  

• Version 1.0: 2004-10-05
  Type: Initial release
  
• Version 1.1: 2008-02-01
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2017-10-11
  Changes: Refinement description
• Version 1.4: 2023-08-23
  Changes: Data collection, Database references, Derived calculations, Refinement description
• Version 1.5: 2023-11-15
  Changes: Data collection
• Version 1.6: 2024-10-30
  Changes: Structure summary