3SQC Isomerase date Sep 04, 1998
title Squalene-Hopene Cyclase
authors K.U.Wendt, G.E.Schulz
compound source
Molecule: Squalene--Hopene Cyclase
Chain: A, B, C
Ec: 5.4.99.-
Engineered: Yes
Mutation: Yes
 Organism_scientific: Alicyclobacillus Acidocaldarius
Organism_taxid: 405212
Cell_line: Jm105
Atcc: Atcc 27009
Collection: Atcc 27009
Cellular_location: Membrane
Expression_system: Escherichia Coli K12
Expression_system_taxid: 83333
Expression_system_strain: K12
Expression_system_cell_line: Jm105
Expression_system_cellular_location: Cytoplasmic Membrane
Expression_system_plasmid: Pkk223-3
Other_details: Thermostable, Acidophilic
symmetry Space Group: P 32 2 1
R_factor 0.209 R_Free 0.236
crystal
cell
length a length b length c angle alpha angle beta angle gamma
140.960 140.960 243.800 90.00 90.00 120.00
method X-Ray Diffractionresolution 2.80 Å
ligand
enzyme Isomerase E.C.5.4.99 BRENDA
related structures by homologous chain: 1H35, 1H3B
Gene
Ontology
ChainFunctionProcessComponent
A, C, B


Primary referenceThe structure of the membrane protein squalene-hopene cyclase at 2.0 A resolution., Wendt KU, Lenhart A, Schulz GE, J Mol Biol 1999 Feb 12;286(1):175-87. PMID:9931258
Data retrieval
  • Asymmetric unit, PDB entry: [header only] [complete with coordinates] (301 Kb) [Save to disk]
  • Biological Unit Coordinates (3sqc.pdb1.gz) 101 Kb
  • Biological Unit Coordinates (3sqc.pdb2.gz) 102 Kb
  • Biological Unit Coordinates (3sqc.pdb3.gz) 102 Kb
  • CSU: Contacts of Structural Units for 3SQC
  • Likely Quarternary Molecular Structure file(s) for 3SQC
  • Structure Factors (512 Kb)
  • Retrieve 3SQC in mmCIF format [Save to disk]
  • SEQRES to COORDINATES correlation for 3SQC from S2C, [Save to disk]
  • Re-refined 3sqc structure from PDB_REDO, a databank with updated and optimised macromolecular X-ray diffraction structure models
    • View 3SQC in 3D
  • Proteopedia, because life has more than 2D.
  • On Jmol, a nice Rasmol like molecule viewer. This is good for easiest viewing of basic structure.
  • On FirstGlance, an excellent tool for a guided tour on the structure components, by E. Martz.
    • Visual 3D analysis of 3SQC
  • Ramachandran plot from PDBSum
    • Structure-derived information
  • Electron Density related parameters from EDS Electron Density Server, at Upsala
  • Dipole moment, from Dipole Server at Weizmann Institute
  • 3D motif for 3SQC, from MSDmotif at EBI
  • Classification of representative domains in scop (Structural Classification of Proteins)
        - Domain d3sqca1, region A:10-36,A:308-628 [Jmol] [rasmolscript] [script source]
        - Domain d3sqca2, region A:37-307 [Jmol] [rasmolscript] [script source]
        - Domain d3sqcb1, region B:10-36,B:308-628 [Jmol] [rasmolscript] [script source]
        - Domain d3sqcb2, region B:37-307 [Jmol] [rasmolscript] [script source]
        - Domain d3sqcc1, region C:10-36,C:308-628 [Jmol] [rasmolscript] [script source]
        - Domain d3sqcc2, region C:37-307 [Jmol] [rasmolscript] [script source]
  • Class (fold), Architecture (subfold), Topology, Homologous superfamily from CATH
  • Summaries and structural analyses of PDB data files from PDBSum
  • Identification of Protein Pockets & Cavities at CASTp
    • Sequence-derived information
  • View one-letter amino acid or nucleotide sequence for each chain: [3sqc_C] [3sqc_B] [3sqc] [3sqc_A]
  • SWISS-PROT database: [P33247]
  • Domain organization of [SQHC_ALIAD] by SWISSPFAM
    • Other resources with information on 3SQC
  • Community annotation for 3SQC at PDBWiki (http://pdbwiki.org)
  • MMDB (Entrez's Structure Database)
    • Movements, Movies and Images
  • Images from IMB Jena Image Library of Biological Macromolecules.

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