2NQD Hydrolase Inhibitor Hydrolase date Oct 31, 2006
title Crystal Structure Of Cysteine Protease Inhibitor, Chagasin, With Human Cathepsin L
authors I.Redzynia, G.Bujacz, A.Ljunggren, M.Jaskolski, M.Abrahamson
compound source
Molecule: Chagasin
Chain: A
Synonym: Cysteine Protease Inhibitor
Engineered: Yes
Organism_scientific: Trypanosoma Cruzi
Organism_taxid: 5693
Expression_system: Escherichia Coli Bl21
Expression_system_taxid: 511693
Expression_system_strain: Bl21
Expression_system_vector_type: Plasmid
Expression_system_plasmid: Pgex-6p-1

Molecule: Cathepsin L
Chain: B
Fragment: Residues 1-220
Synonym: Cysteine Protease, Major Excreted Protein, Mep
Engineered: Yes
Mutation: Yes

Organism_scientific: Homo Sapiens
Organism_common: Human
Organism_taxid: 9606
Expression_system: Pichia Pastoris
Expression_system_taxid: 4922
Expression_system_strain: Gs115
Expression_system_vector_type: Plasmid
Expression_system_plasmid: Ppic9
symmetry Space Group: P 1 21 1
R_factor 0.148 R_Free 0.188
length a length b length c angle alpha angle beta angle gamma
59.270 50.063 65.008 90.00 103.44 90.00
method X-Ray Diffractionresolution 1.75 Å
ligand CL, NA, NAG, NDG enzyme Hydrolase E.C. BRENDA
note 2NQD is a representative structure
  • cysteine-type endopeptidase ...

  • B

    Primary referenceCrystal structure of the parasite protease inhibitor chagasin in complex with a host target cysteine protease., Ljunggren A, Redzynia I, Alvarez-Fernandez M, Abrahamson M, Mort JS, Krupa JC, Jaskolski M, Bujacz G, J Mol Biol. 2007 Aug 3;371(1):137-53. Epub 2007 May 10. PMID:17561110
    Data retrieval
  • Asymmetric unit, PDB entry: [header only] [complete with coordinates] (70 Kb) [Save to disk]
  • Biological Unit Coordinates (2nqd.pdb1.gz) 64 Kb
  • LPC: Ligand-Protein Contacts for 2NQD
  • CSU: Contacts of Structural Units for 2NQD
  • Likely Quarternary Molecular Structure file(s) for 2NQD
  • Structure Factors (275 Kb)
  • Retrieve 2NQD in mmCIF format [Save to disk]
  • SEQRES to COORDINATES correlation for 2NQD from S2C, [Save to disk]
  • Re-refined 2nqd structure from PDB_REDO, a databank with updated and optimised macromolecular X-ray diffraction structure models
  • View 2NQD 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 2NQD
  • Cartoon representation from PDB Cartoon
  • 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
  • Crystal Contacts, from CryCo at Weizmann Institute
  • 3D motif for 2NQD, from MSDmotif at EBI
  • Fold representative 2nqd from FSSP and Dali (Families of Structurally Similar Proteins)
  • Sequence-derived information
  • View one-letter amino acid or nucleotide sequence for each chain: [2nqd_B] [2nqd_A] [2nqd]
  • SWISS-PROT database: [P07711] [Q966X9]
  • Domain organization of [CATL1_HUMAN] [CHAG_TRYCR] by SWISSPFAM
  • Domain found in 2NQD: [Pept_C1 ] by SMART
  • Other resources with information on 2NQD
  • Community annotation for 2NQD 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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