1UMP

GEOMETRY OF TRITERPENE CONVERSION TO PENTACARBOCYCLIC HOPENE


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.13 Å
  • R-Value Free: 0.228 
  • R-Value Work: 0.186 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Conversion of Squalene to the Pentacarbocyclic Hopene

Reinert, D.J.Balliano, G.Schulz, G.E.

(2004) Chem.Biol. 11: 121

  • DOI: 10.1016/j.chembiol.2003.12.013

  • PubMed Abstract: 
  • The membrane protein squalene-hopene cyclase was cocrystallized with 2-azasqualene and analyzed by X-ray diffraction to 2.13 A resolution. The conformation of this close analog was clearly established, and it agreed with the common textbook presentat ...

    The membrane protein squalene-hopene cyclase was cocrystallized with 2-azasqualene and analyzed by X-ray diffraction to 2.13 A resolution. The conformation of this close analog was clearly established, and it agreed with the common textbook presentation. The bound squalene undergoes only small conformational changes during the formation of rings A through D, thus requiring no intermediate. However, ring E formation is hindered by an entropic barrier, which may explain its absence in the steroids. The structure analysis revealed a mobile region between the active center cavity and the membrane, which may melt, opening a passage for squalene and hopene.


    Related Citations: 
    • Crystal Structure of a Squalene Cyclase in Complex with the Potential Anticholesteremic Drug Ro48-8071
      Lenhart, A.,Weihofen, W.,Pleschke, A.,Schulz, G.
      (2002) Chem.Biol. 9: 639
    • Structure and Function of a Squalene Cyclase
      Wendt, K.U.,Poralla, K.,Schulz, G.E.
      (1997) Science 277: 1811
    • The Structure of the Membrane Protein Squalene-Hopene Cyclase at 2.0 A Resolution
      Wendt, K.U.,Lenhart, A.,Schulz, G.E.
      (1999) J.Mol.Biol. 286: 175
    • Crystallization and Preliminary X-Ray Crystallographic Analysis of Squalene-Hopene Cyclase from Alicyclobacillus Acidocaldarius
      Wendt, K.U.,Feil, C.,Lenhart, A.,Poralla, K.,Schulz, G.E.
      (1997) Protein Sci. 6: 722


    Organizational Affiliation

    Institut für Organische Chemie und Biochemie, Albert-Ludwigs-Universität, Albertstr. 21, D-79104 Freiburg, Germany.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
SQUALENE--HOPENE CYCLASE
A, B, C
631Alicyclobacillus acidocaldarius subsp. acidocaldarius (strain ATCC 27009 / DSM 446 / JCM 5260 / NBRC 15652 / NCIMB 11725 / NRRL B-14509 / 104-1A)Gene Names: shc
EC: 5.4.99.17, 4.2.1.129
Find proteins for P33247 (Alicyclobacillus acidocaldarius subsp. acidocaldarius (strain ATCC 27009 / DSM 446 / JCM 5260 / NBRC 15652 / NCIMB 11725 / NRRL B-14509 / 104-1A))
Go to UniProtKB:  P33247
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
C8E
Query on C8E

Download SDF File 
Download CCD File 
A, B, C
(HYDROXYETHYLOXY)TRI(ETHYLOXY)OCTANE
C16 H34 O5
FEOZZFHAVXYAMB-UHFFFAOYSA-N
 Ligand Interaction
SQA
Query on SQA

Download SDF File 
Download CCD File 
A, B, C
2-AZASQUALENE
(4E,8E,12Z,16Z)-N,N,4,8,13,17,21-HEPTAMETHYLDOCOSA-4,8,12,16,20-PENTAEN-1-AMINE
C29 H51 N
OBYAAZRQFIVRJS-GUUMBNHASA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.13 Å
  • R-Value Free: 0.228 
  • R-Value Work: 0.186 
  • Space Group: P 32 2 1
Unit Cell:
Length (Å)Angle (°)
a = 139.144α = 90.00
b = 139.144β = 90.00
c = 240.699γ = 120.00
Software Package:
Software NamePurpose
XDSdata scaling
CNSphasing
REFMACrefinement
XDSdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2004-02-03
    Type: Initial release
  • Version 1.1: 2013-11-20
    Type: Derived calculations, Non-polymer description, Other, Source and taxonomy, Version format compliance