1CIR	Serine Protease Inhibitor	date	Oct 02, 1995
title	Complex Of Two Fragments Of Ci2 [(1-40)(Dot)(41-64)]
authors	B.J.Davis, A.R.Fersht
compound		source
Molecule: Chymotrypsin Inhibitor 2 Chain: A Synonym: Ci2 Engineered: Yes Other_details: Cleaved Between Residues 40 And 41		Organism_scientific: Hordeum Vulgare Organism_taxid: 4513 Strain: Hiproly Expression_system: Escherichia Coli Expression_system_taxid: 562 Expression_system_plasmid: Ptz18u
Molecule: Chymotrypsin Inhibitor 2 Chain: B Synonym: Ci2 Engineered: Yes Other_details: Cleaved Between Residues 40 And 41		Organism_scientific: Hordeum Vulgare Organism_taxid: 4513 Strain: Hiproly Expression_system: Escherichia Coli Expression_system_taxid: 562 Expression_system_plasmid: Ptz18u
method	Solution NMR
related structures	by homologous chain: 1CIS, 3CI2
Gene Ontology	Chain Function Process Component A, B
Primary reference	Towards the complete structural characterization of a protein folding pathway: the structures of the denatured, transition and native states for the association/folding of two complementary fragments of cleaved chymotrypsin inhibitor 2. Direct evidence for a nucleation-condensation mechanism., Neira JL, Davis B, Ladurner AG, Buckle AM, Gay Gde P, Fersht AR, Fold Des 1996;1(3):189-208. PMID:9079381

Data retrieval

Asymmetric unit, PDB entry: [header only] [complete with coordinates] (350 Kb) [Save to disk] Biological Unit Coordinates (1cir.pdb1.gz) 18 Kb CSU: Contacts of Structural Units for 1CIR Original NMR restraints for 1CIR from PDB Retrieve 1CIR in mmCIF format [Save to disk] SEQRES to COORDINATES correlation for 1CIR from S2C, [Save to disk]

View 1CIR 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 1CIR

Ramachandran plot from PDBSum

Structure-derived information

Dipole moment, from Dipole Server at Weizmann Institute 3D motif for 1CIR, from MSDmotif at EBI Classification of representative domains in scop (Structural Classification of Proteins)     - Domain d1cir.1, region A:,B [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: [1cir_B] [1cir_A] [1cir] SWISS-PROT database: [P01053] Domain organization of [ICI2_HORVU] by SWISSPFAM

Other resources with information on 1CIR

Community annotation for 1CIR at PDBWiki (http://pdbwiki.org) NMR Ensemble (OLDERADO: core, domain and representative structure database) MMDB (Entrez's Structure Database)

Movements, Movies and Images

Images from IMB Jena Image Library of Biological Macromolecules.

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