2E6U

Crystal structure of hypothetical protein PH1109 from Pyrococcus horikoshii


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.80 Å
  • R-Value Free: 0.233 
  • R-Value Work: 0.205 
  • R-Value Observed: 0.207 

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Ligand Structure Quality Assessment 


This is version 1.2 of the entry. See complete history


Literature

Structure determination of a novel protein by sulfur SAD using chromium radiation in combination with a new crystal-mounting method

Kitago, Y.Watanabe, N.Tanaka, I.

(2005) Acta Crystallogr D Biol Crystallogr 61: 1013-1021

  • DOI: 10.1107/S0907444905012734
  • Primary Citation of Related Structures:  
    2E6U

  • PubMed Abstract: 
  • A novel and easy crystal-mounting technique was developed for the sulfur SAD method using Cr Kalpha radiation (2.29 A). Using this technique, the cryo-buffer and cryoloop around the protein crystal can be removed before data collection in order to eliminate their X-ray absorption ...

    A novel and easy crystal-mounting technique was developed for the sulfur SAD method using Cr Kalpha radiation (2.29 A). Using this technique, the cryo-buffer and cryoloop around the protein crystal can be removed before data collection in order to eliminate their X-ray absorption. The superiority and reproducibility of the data sets with this mounting technique were demonstrated using tetragonal hen egg-white lysozyme crystals. The structure of a novel protein, PH1109, from Pyrococcus horikoshii OT3 was solved using this technique. At the wavelength of Cr Kalpha radiation, the anomalous signal |DeltaF|/|F| of PH1109 is expected to be 1.72% as this protein of 144 residues includes four methionines and two cysteines. Sulfur SAD phasing was performed using SHELXD and SHELXE. In the case of the data set obtained using this novel crystal-mounting technique, 54.9% of all residues were built with side chains automatically by RESOLVE. On the other hand, only 16.0% were built with side chains for the data set collected using the standard cryoloop. These results indicated that this crystal-mounting technique was superior to the standard loop-mounting method for the measurement of small anomalous differences at longer wavelength and yielded better results in sulfur-substructure solution and initial phasing. The present study demonstrates that the sulfur SAD method with a chromium source becomes enhanced and more practical for macromolecular structure determination using the new crystal-mounting technique.


    Organizational Affiliation

    Division of Biological Sciences, Graduate School of Science, Hokkaido University, Japan.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
hypothetical protein PH1109A [auth X]144Pyrococcus horikoshii OT3Mutation(s): 0 
Gene Names: PH1109
UniProt
Find proteins for O58836 (Pyrococcus horikoshii (strain ATCC 700860 / DSM 12428 / JCM 9974 / NBRC 100139 / OT-3))
Explore O58836 
Go to UniProtKB:  O58836
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
COA (Subject of Investigation/LOI)
Query on COA

Download Ideal Coordinates CCD File 
F [auth X]COENZYME A
C21 H36 N7 O16 P3 S
RGJOEKWQDUBAIZ-IBOSZNHHSA-N
 Ligand Interaction
CA
Query on CA

Download Ideal Coordinates CCD File 
B [auth X]CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
CL
Query on CL

Download Ideal Coordinates CCD File 
C [auth X], D [auth X], E [auth X]CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.80 Å
  • R-Value Free: 0.233 
  • R-Value Work: 0.205 
  • R-Value Observed: 0.207 
  • Space Group: P 65 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 69.563α = 90
b = 69.563β = 90
c = 142.606γ = 120
Software Package:
Software NamePurpose
REFMACrefinement
ADSCdata collection
DENZOdata reduction
SCALEPACKdata scaling
SHELXEmodel building

Structure Validation

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Ligand Structure Quality Assessment  



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2007-01-23
    Type: Initial release
  • Version 1.1: 2008-04-30
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Derived calculations, Source and taxonomy, Version format compliance