2W6R

Crystal structure of an artificial (ba)8-barrel protein designed from identical half barrels


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.1 Å
  • R-Value Free: 0.285 
  • R-Value Work: 0.242 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

High-Resolution Crystal Structure of an Artificial (Betaalpha)(8)-Barrel Protein Designed from Identical Half-Barrels.

Hocker, B.Lochner, A.Seitz, T.Claren, J.Sterner, R.

(2009) Biochemistry 48: 1145

  • DOI: 10.1021/bi802125b

  • PubMed Abstract: 
  • Ample evidence suggests that the ubiquitous (betaalpha)(8)-barrel enzyme fold has evolved by the duplication and fusion of an ancestral (betaalpha)(4)-half-barrel. To reconstruct this process in the laboratory with a model protein, we earlier fused t ...

    Ample evidence suggests that the ubiquitous (betaalpha)(8)-barrel enzyme fold has evolved by the duplication and fusion of an ancestral (betaalpha)(4)-half-barrel. To reconstruct this process in the laboratory with a model protein, we earlier fused two copies of the C-terminal half-barrel HisF-C of imidazole glycerol phosphate synthase (HisF) and stepwise stabilized the resulting HisF-CC construct. We now further increased its stability and solubility by introducing two additional amino acid exchanges, which allowed us to crystallize the resulting artificial (betaalpha)(8)-barrel protein HisF-C***C. The analysis of its X-ray structure at 2.1 A resolution reveals a striking similarity to wild-type HisF, helps us to understand its improved stability, and provides further insights into the evolution of (betaalpha)(8)-barrel proteins.


    Organizational Affiliation

    Max Planck Institute for Developmental Biology, Spemannstrasse 35, D-72076 Tubingen, Germany. birte.hoecker@tuebingen.mpg.de




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
IMIDAZOLE GLYCEROL PHOSPHATE SYNTHASE SUBUNIT HISF
A
266Thermotoga maritima (strain ATCC 43589 / MSB8 / DSM 3109 / JCM 10099)Mutation(s): 0 
Gene Names: hisF
EC: 4.1.3.-
Find proteins for Q9X0C6 (Thermotoga maritima (strain ATCC 43589 / MSB8 / DSM 3109 / JCM 10099))
Go to UniProtKB:  Q9X0C6
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.1 Å
  • R-Value Free: 0.285 
  • R-Value Work: 0.242 
  • Space Group: P 31 2 1
Unit Cell:
Length (Å)Angle (°)
a = 58.000α = 90.00
b = 58.000β = 90.00
c = 131.000γ = 120.00
Software Package:
Software NamePurpose
REFMACrefinement
XDSdata reduction
MOLREPphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2009-02-03
    Type: Initial release
  • Version 1.1: 2011-05-08
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance