2E5W | pdb_00002e5w

Crystal structure of spermidine synthase from Pyrococcus horikoshii OT3

• PDB DOI: https://doi.org/10.2210/pdb2E5W/pdb

• Classification: TRANSFERASE
• Organism(s): Pyrococcus horikoshii OT3
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2006-12-25 Released: 2007-06-26 
• Deposition Author(s): Mizutani, H., Kunishima, N., RIKEN Structural Genomics/Proteomics Initiative (RSGI)

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.00 Å
• R-Value Free: 
  0.215 (Depositor), 0.210 (DCC) 
• R-Value Work: 
  0.194 (Depositor), 0.190 (DCC) 
• R-Value Observed: 
  0.194 (Depositor) 

Starting Model: experimental

Literature

Crystal structure of spermidine synthase from Pyrococcus horikoshii OT3

Mizutani, H., Kunishima, N.

To be published.

Biological Assembly 1  

Global Symmetry: Cyclic - C2  (Explore in 3D)
Global Stoichiometry: Homo 2-mer - A2 

Biological assembly 1 assigned by authors and generated by PISA (software)

Biological Assembly 2  

Global Symmetry: Cyclic - C2  (Explore in 3D)
Global Stoichiometry: Homo 2-mer - A2 

Biological assembly 2 assigned by authors and generated by PISA (software)

Macromolecule Content 

• Total Structure Weight: 129.25 kDa 
• Atom Count: 9,777 
• Modeled Residue Count: 1,098 
• Deposited Residue Count: 1,120 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Probable spermidine synthase	A, B, C, D	280	Pyrococcus horikoshii OT3	Mutation(s): 0  EC: 2.5.1.16
UniProt
Find proteins for O57950 (Pyrococcus horikoshii (strain ATCC 700860 / DSM 12428 / JCM 9974 / NBRC 100139 / OT-3)) Explore O57950  Go to UniProtKB:  O57950

Small Molecules

Ligands 3 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
MTA	G [auth A], K [auth C]	5'-DEOXY-5'-METHYLTHIOADENOSINE C11 H15 N5 O3 S WUUGFSXJNOTRMR-IOSLPCCCSA-N
AG3	F [auth A], J [auth C]	1-{4-[(3-aminopropyl)amino]butyl}guanidine C8 H21 N5 XYCUJKFFVBCJEF-UHFFFAOYSA-N
ACT	E [auth A], H [auth B], I [auth C], L [auth D]	ACETATE ION C2 H3 O2 QTBSBXVTEAMEQO-UHFFFAOYSA-M

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.00 Å
• R-Value Free:  0.215 (Depositor), 0.210 (DCC) 
• R-Value Work:  0.194 (Depositor), 0.190 (DCC) 
• R-Value Observed: 0.194 (Depositor) 

Space Group: C 1 2 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 149.411	α = 90
b = 122.735	β = 117.69
c = 102.085	γ = 90

Software Package:

Software Name	Purpose
CNS	refinement
HKL-2000	data collection
HKL-2000	data reduction
HKL-2000	data scaling
MOLREP	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 2007-06-26 
Deposition Author(s): Mizutani, H., Kunishima, N., RIKEN Structural Genomics/Proteomics Initiative (RSGI)

Revision History  

• Version 1.0: 2007-06-26
  Type: Initial release
  
• Version 1.1: 2008-04-30
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Source and taxonomy, Version format compliance
• Version 1.3: 2023-10-25
  Changes: Data collection, Database references, Derived calculations, Refinement description