1QO2

Crystal structure of N-((5'-phosphoribosyl)-formimino)-5-aminoimidazol-4-carboxamid ribonucleotid isomerase (EC 3.1.3.15, HisA)

PDB DOI: https://doi.org/10.2210/pdb1QO2/pdb

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

Deposited: 1999-11-01 Released: 2000-07-12
Deposition Author(s): Wilmanns, M., Lang, D., Thoma, R., Sterner, R.

Experimental Data Snapshot

Method: X-RAY DIFFRACTION
Resolution: 1.85 Å
R-Value Free: 0.246
R-Value Work: 0.188
R-Value Observed: 0.188

wwPDB Validation 3D Report Full Report

This is version 1.4 of the entry. See complete history.

Literature

Structural Evidence for Evolution of the Beta/Alpha-Barrel Scaffold by Repeated Gene Duplication and Fusion

Lang, D., Thoma, R., Henn-Sax, M., Sterner, R., Wilmanns, M.

(2000) Science 289: 1546

PubMed: 10968789 Search on PubMed
DOI: https://doi.org/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.

Organizational Affiliation

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

Macromolecule Content

Total Structure Weight: 54.42 kDa
Atom Count: 4,345
Modelled Residue Count: 482
Deposited Residue Count: 482
Unique protein chains: 1

Macromolecules

Find similar proteins by:

(by identity cutoff) | 3D Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
N/A	A, B	241	Thermotoga maritima	Mutation(s): 0 Gene Names: THISA EC: 5.3.1.15
UniProt
Find proteins for Q9X0C7 (Thermotoga maritima (strain ATCC 43589 / DSM 3109 / JCM 10099 / NBRC 100826 / MSB8)) Explore Q9X0C7 Go to UniProtKB: Q9X0C7
Entity Groups
Sequence Clusters	30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt Group	Q9X0C7
Sequence Annotations Expand
Reference Sequence

Small Molecules

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

Experimental Data & Validation

Experimental Data

Method: X-RAY DIFFRACTION
Resolution: 1.85 Å
R-Value Free: 0.246
R-Value Work: 0.188
R-Value Observed: 0.188
Space Group: P 1 2₁ 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 46.78	α = 90
b = 73.16	β = 97.42
c = 62.7	γ = 90

Software Package:

Software Name	Purpose
CNS	refinement
DENZO	data reduction
SCALEPACK	data scaling
CNS	phasing
SHARP	phasing
SOLVE	phasing

Structure Validation

View Full Validation Report

Entry History

Deposition Data

Released Date: 2000-07-12

Deposition Author(s):

Revision History (Full details and data files)

Version 1.0: 2000-07-12
Type: Initial release
Version 1.1: 2011-05-08
Changes: Version format compliance
Version 1.2: 2011-07-13
Changes: Version format compliance
Version 1.3: 2019-05-22
Changes: Data collection, Derived calculations, Other, Refinement description
Version 1.4: 2019-07-24
Changes: Data collection