3IMA	Hydrolase Hydrolase Inhibitor	date	Aug 10, 2009
title	Complex Structure Of Tarocystatin And Papain
authors	M.H.Chu, K.L.Liu, K.W.Yeh, Y.S.Cheng
compound		source
Molecule: Papain Chain: A, C Fragment: Papain Domain Synonym: Papaya Proteinase I, Ppi Ec: 3.4.22.2		Organism_scientific: Carica Papaya Organism_common: Mamon Organism_taxid: 3649 Other_details: Papain Was Purchased From Sigma Co. For Co- Crystallization With Cecpi.;
Molecule: Cysteine Proteinase Inhibitor Chain: B, D Fragment: N-Terminal Domain, Unp Residues 2-92 Synonym: Tarocystatin, Cecpi Engineered: Yes		Organism_scientific: Colocasia Esculenta Organism_common: Cocoyam,Dasheen,Eddo,Elephant'S Ear,Kalo,M Organism_taxid: 4460 Gene: Cpi Expression_system: Escherichia Coli Expression_system_taxid: 562 Expression_system_strain: E.Coli Bl21 (De3) Expression_system_vector_type: Plasmid Expression_system_plasmid: Pgex-4t-1
symmetry	Space Group: P 21 21 21	R_factor 0.182 R_Free 0.233
crystal cell	length a length b length c angle alpha angle beta angle gamma 36.060 99.720 165.590 90.00 90.00 90.00
method	X-Ray Diffraction	resolution	2.03 Å
ligand	ACT, OCS	enzyme	Hydrolase E.C.3.4.22.2 BRENDA
note	3IMA is a representative structure
Gene Ontology	Chain Function Process Component A, C D, B
Primary reference	Crystal structure of tarocystatin-papain complex: implications for the inhibition property of group-2 phytocystatins., Chu MH, Liu KL, Wu HY, Yeh KW, Cheng YS, Planta. 2011 Aug;234(2):243-54. Epub 2011 Mar 18. PMID:21416241

Data retrieval

Asymmetric unit, PDB entry: [header only] [complete with coordinates] (108 Kb) [Save to disk] Biological Unit Coordinates (3ima.pdb1.gz) 54 Kb Biological Unit Coordinates (3ima.pdb2.gz) 52 Kb LPC: Ligand-Protein Contacts for 3IMA CSU: Contacts of Structural Units for 3IMA Structure Factors (285 Kb) Retrieve 3IMA in mmCIF format [Save to disk] SEQRES to COORDINATES correlation for 3IMA from S2C, [Save to disk] Re-refined 3ima structure from PDB_REDO, a databank with updated and optimised macromolecular X-ray diffraction structure models

View 3IMA 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 3IMA

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 3IMA, from MSDmotif at EBI

Sequence-derived information

View one-letter amino acid or nucleotide sequence for each chain: [3ima_C] [3ima_B] [3ima_A] [3ima] [3ima_D] SWISS-PROT database: [Q8L5J8] Domain organization of [Q8L5J8_COLES] by SWISSPFAM Domains found in 3IMA: [CY] [Pept_C1 ] by SMART

Other resources with information on 3IMA

Community annotation for 3IMA at PDBWiki (http://pdbwiki.org) MMDB (Entrez's Structure Database)

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Images from IMB Jena Image Library of Biological Macromolecules.

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