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 Ec: 3.4.22.15 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
crystal cell	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 Diffraction	resolution	1.75 Å
ligand	CL, NA, NAG	enzyme	Hydrolase E.C.3.4.22.15 BRENDA
note	2NQD is a representative structure
Gene Ontology	Chain Function Process Component A cysteine-type endopeptidase ... B
Primary reference	Crystal 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

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 2NQD, from MSDmotif at EBI

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)

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