1THF image
Entry Detail
PDB ID:
1THF
Keywords:
Title:
CYCLASE SUBUNIT OF IMIDAZOLEGLYCEROLPHOSPHATE SYNTHASE FROM THERMOTOGA MARITIMA
Biological Source:
Source Organism:
Host Organism:
PDB Version:
Deposition Date:
1998-09-17
Release Date:
2000-07-14
Method Details:
Experimental Method:
Resolution:
1.45 Å
R-Value Free:
0.21
R-Value Work:
0.17
R-Value Observed:
0.19
Space Group:
C 1 2 1
Macromolecular Entities
Polymer Type:polypeptide(L)
Description:HISF PROTEIN
Chain IDs:A (auth: D)
Chain Length:253
Number of Molecules:1
Biological Source:Thermotoga maritima
Ligand Molecules
Primary Citation
Structural evidence for evolution of the beta/alpha barrel scaffold by gene duplication and fusion.
Science 289 1546 1550 (2000)
PMID: 10968789 DOI: 10.1126/science.289.5484.1546

Abstact

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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Primary Citation of related structures