1QC9 Endonuclease date May 18, 1999
title The Crystallographic Structure Of Restriction Endonuclease E 3.3 A In The Absense Of Dna
authors K.Chandrasekhar, M.M.Horvath, C.Samudzi, J.Choi, J.M.Rosenberg
compound source
Molecule: Protein (Eco Ri Endonuclease)
Chain: A, B, C
Ec: 3.1.21.4
 Organism_scientific: Escherichia Coli
Organism_taxid: 562
symmetry Space Group: C 1 2 1
R_factor 0.251 R_Free 0.295
crystal
cell
length a length b length c angle alpha angle beta angle gamma
208.680 127.350 49.870 90.00 98.57 90.00
method X-Ray Diffractionresolution 3.00 Å
ligand
enzyme Hydrolase E.C.3.1.21.4 BRENDA
related structures by homologous chain: 1ERI
Gene
Ontology
ChainFunctionProcessComponent
A, C, B
  • nuclease activity
  • endonuclease activity


    • Data retrieval
  • Asymmetric unit, PDB entry: [header only] [complete with coordinates] (114 Kb) [Save to disk]
  • Biological Unit Coordinates (1qc9.pdb1.gz) 74 Kb
  • Biological Unit Coordinates (1qc9.pdb2.gz) 73 Kb
  • CSU: Contacts of Structural Units for 1QC9
  • Likely Quarternary Molecular Structure file(s) for 1QC9
  • Retrieve 1QC9 in mmCIF format [Save to disk]
  • SEQRES to COORDINATES correlation for 1QC9 from S2C, [Save to disk]
    • View 1QC9 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 1QC9
  • Ramachandran plot from PDBSum
    • Structure-derived information
  • Dipole moment, from Dipole Server at Weizmann Institute
  • 3D motif for 1QC9, from MSDmotif at EBI
  • Classification of representative domains in scop (Structural Classification of Proteins)
        - Domain d1qc9a_, region A [Jmol] [rasmolscript] [script source]
        - Domain d1qc9b_, region B [Jmol] [rasmolscript] [script source]
        - Domain d1qc9c_, region C [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: [1qc9_A] [1qc9] [1qc9_B] [1qc9_C]
  • SWISS-PROT database: [P00642]
  • Domain organization of [T2E1_ECOLX] by SWISSPFAM
    • Other resources with information on 1QC9
  • Community annotation for 1QC9 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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