Biological Assembly 1  

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

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 27.93 kDa 
• Atom Count: 2,274 
• Modelled Residue Count: 253 
• Deposited Residue Count: 253 
• Unique protein chains: 1

 1THF

CYCLASE SUBUNIT OF IMIDAZOLEGLYCEROLPHOSPHATE SYNTHASE FROM THERMOTOGA MARITIMA

• PDB DOI: 10.2210/pdb1THF/pdb

• Classification: LYASE
• Organism(s): Thermotoga maritima
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 1998-09-17 Released: 2000-07-14 
• Deposition Author(s): Lang, D.A., Wilmanns, M.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.45 Å
• R-Value Free: 0.214 
• R-Value Work: 0.178 
• R-Value Observed: 0.198 

Literature

Structural evidence for evolution of the beta/alpha barrel scaffold by gene duplication and fusion.

Lang, D.A., Obmolova, G., Thoma, R., Kirschner, K., Sterner, R., Wilmanns, M.

(2000) Science 289: 1546-1550

• PubMed: 10968789 
• DOI: 10.1126/science.289.5484.1546
• Primary Citation of Related Structures:  
  1QO2, 1THF


• PubMed Abstract: 
  

The atomic structures of two proteins in the histidine biosynthesis pathway consist of beta/alpha barrels with a twofold repeat pattern. It is likely that these proteins evolved by twofold gene duplication and gene fusion from a common half-barrel ancestor. These ancestral domains are not visible as independent domains in the extant proteins but can be inferred from a combination of sequence and structural analysis. The detection of subdomain structures may be useful in efforts to search genome sequences for functionally and structurally related proteins.

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Related Citations: 

• A Histidine Gene Cluster of the Hyperthermophile Thermotoga Maritima: Sequence Analysis and Evolutionary Significance
  Thoma, R., Schwander, M., Liebl, W., Kirschner, K., Sterner, R.
  (1998) Extremophiles 2: 379

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Organizational Affiliation: 

European Molecular Biology Laboratory (EMBL) Hamburg Outstation, EMBL c/o Deutsches Elektronen- Synchrotron (DESY), Notkestrasse 85, D-22603 Hamburg, Germany.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
HISF PROTEIN	A [auth D]	253	Thermotoga maritima	Mutation(s): 0  EC: 4.3.2.10
UniProt
Find proteins for Q9X0C6 (Thermotoga maritima (strain ATCC 43589 / DSM 3109 / JCM 10099 / NBRC 100826 / MSB8)) Explore Q9X0C6  Go to UniProtKB:  Q9X0C6

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
PO4	B [auth D], C [auth D]	PHOSPHATE ION O4 P NBIIXXVUZAFLBC-UHFFFAOYSA-K

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.45 Å
• R-Value Free: 0.214 
• R-Value Work: 0.178 
• R-Value Observed: 0.198 
• Space Group: C 1 2 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 79.68	α = 90
b = 44.42	β = 112.01
c = 63.91	γ = 90

Software Package:

Software Name	Purpose
SHARP	phasing
REFMAC	refinement
DENZO	data reduction
SCALEPACK	data scaling

Structure Validation

Entry History 

Deposition Data

• Released Date: 2000-07-14 
Deposition Author(s): Lang, D.A., Wilmanns, M.

Revision History  

• Version 1.0: 2000-07-14
  Type: Initial release
  
• Version 1.1: 2008-03-24
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance