2RA3	Hydrolase Hydrolase Inhibitor	date	Sep 14, 2007
title	Human Cationic Trypsin Complexed With Bovine Pancreatic Trypsin Inhibitor (Bpti)
authors	M.A.Salameh, A.S.Soares, E.S.Radisky
compound		source
Molecule: Trypsin-1 Chain: A, B Synonym: Trypsin I, Cationic Trypsinogen, Serine Protease 1; Ec: 3.4.21.4 Engineered: Yes Mutation: Yes		Organism_scientific: Homo Sapiens Organism_common: Human Organism_taxid: 9606 Gene: Prss1, Trp1, Try1, Tryp1 Expression_system: Escherichia Coli Expression_system_taxid: 562 Expression_system_strain: Rosetta2(De3)
Molecule: Pancreatic Trypsin Inhibitor Chain: I, C Synonym: Basic Protease Inhibitor, Bpi, Bpti, Aprotinin		Organism_scientific: Bos Taurus Organism_common: Cattle Organism_taxid: 9913 Strain: A1153
symmetry	Space Group: C 2 2 21	R_factor 0.153 R_Free 0.178
crystal cell	length a length b length c angle alpha angle beta angle gamma 91.183 186.546 90.187 90.00 90.00 90.00
method	X-Ray Diffraction	resolution	1.46 Å
ligand	CA, SO4	enzyme	Hydrolase E.C.3.4.21.4 BRENDA
Gene Ontology	Chain Function Process Component A, B serine-type endopeptidase ac... peptidase activity serine-type peptidase activi... hydrolase activity metal ion binding proteolysis digestion extracellular matrix disasse... extracellular matrix organiz... extracellular region extracellular space
Primary reference	Structural Basis for Accelerated Cleavage of Bovine Pancreatic Trypsin Inhibitor (BPTI) by Human Mesotrypsin., Salameh MA, Soares AS, Hockla A, Radisky ES, J Biol Chem. 2008 Feb 15;283(7):4115-23. Epub 2007 Dec 12. PMID:18077447

Data retrieval

Asymmetric unit, PDB entry: [header only] [complete with coordinates] (205 Kb) [Save to disk] Biological Unit Coordinates (2ra3.pdb1.gz) 199 Kb Biological Unit Coordinates (2ra3.pdb2.gz) 394 Kb LPC: Ligand-Protein Contacts for 2RA3 CSU: Contacts of Structural Units for 2RA3 Likely Quarternary Molecular Structure file(s) for 2RA3 Structure Factors (866 Kb) Retrieve 2RA3 in mmCIF format [Save to disk] SEQRES to COORDINATES correlation for 2RA3 from S2C, [Save to disk] Re-refined 2ra3 structure from PDB_REDO, a databank with updated and optimised macromolecular X-ray diffraction structure models

View 2RA3 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. On AstexViewer, from MSD-EBI (viewer documentation). On RasMol (Install RasMol freeware) Here's help on how to use RasMol.

Visual 3D analysis of 2RA3

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 2RA3, from MSDmotif at EBI Classification of representative domains in scop (Structural Classification of Proteins)     - Domain d1u2ra3, region A:561-725 [Jmol] [rasmolscript] [script source] Fold representative 2ra3 from FSSP and Dali (Families of Structurally Similar Proteins)

Sequence-derived information

View one-letter amino acid or nucleotide sequence for each chain: [2ra3_A] [2ra3_B] [2ra3_C] [2ra3_I] SWISS-PROT database: [P00974] [P07477] Domain organization of [BPT1_BOVIN] [TRY1_HUMAN] by SWISSPFAM Domains found in 2RA3: [KU] [Tryp_SPc ] by SMART Alignments of the sequence of 2RA3 with the sequences similar proteins can be viewed for 2RA3's classification [BPT1_BOVIN] [TRY1_HUMAN] at ProtoMap. Click on "Neighbors List", then on the "See Alignments" button below the list. A sequence distance tree ("phylogenetic tree") can be viewed for 1ACL's classification [BPT1_BOVIN] [TRY1_HUMAN] at ProtoMap. Click on the Cluster number.

Other resources with information on 2RA3

Community annotation for 2RA3 at PDBWiki (http://pdbwiki.org) MMDB (Entrez's Structure Database)

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