1BTU	Serine Protease	date	Sep 01, 1998
title	Porcine Pancreatic Elastase Complexed With (3s, 4r)-1- Toluenesulphonyl-3-Ethyl-Azetidin-2-One-4-Carboxylic Acid
authors	R.C.Wilmouth, I.J.Clifton, C.J.Schofield
compound		source
Molecule: Elastase Chain: A Synonym: Ppe Ec: 3.4.21.36 Other_details: Porcine Pancreatic Elastase		Organism_scientific: Sus Scrofa Organism_common: Pig Organism_taxid: 9823 Organ: Pancreas
symmetry	Space Group: P 21 21 21	R_factor R_Free
crystal cell	length a length b length c angle alpha angle beta angle gamma 50.570 57.930 74.720 90.00 90.00 90.00
method	X-Ray Diffraction	resolution	1.60 Å
ligand	2BL, CA, SO4	enzyme	Hydrolase E.C.3.4.21.36 BRENDA
related structures	by homologous chain: 1HAX, 1QR3
Gene Ontology	Chain Function Process Component A
Primary reference	Inhibition of elastase by N-sulfonylaryl beta-lactams: anatomy of a stable acyl-enzyme complex., Wilmouth RC, Westwood NJ, Anderson K, Brownlee W, Claridge TD, Clifton IJ, Pritchard GJ, Aplin RT, Schofield CJ, Biochemistry 1998 Dec 15;37(50):17506-13. PMID:9860865

Data retrieval

Asymmetric unit, PDB entry: [header only] [complete with coordinates] (47 Kb) [Save to disk] Biological Unit Coordinates (1btu.pdb1.gz) 43 Kb LPC: Ligand-Protein Contacts for 1BTU CSU: Contacts of Structural Units for 1BTU Likely Quarternary Molecular Structure file(s) for 1BTU Retrieve 1BTU in mmCIF format [Save to disk] SEQRES to COORDINATES correlation for 1BTU from S2C, [Save to disk]

View 1BTU 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 1BTU

Ramachandran plot from PDBSum

Structure-derived information

Dipole moment, from Dipole Server at Weizmann Institute 3D motif for 1BTU, from MSDmotif at EBI Classification of representative domains in scop (Structural Classification of Proteins)     - Domain d1btu__, region [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: [1btu_A] [1btu] SWISS-PROT database: [P00772] Domain organization of [CELA1_PIG] by SWISSPFAM Domain found in 1BTU: [Tryp_SPc ] by SMART

Other resources with information on 1BTU

Community annotation for 1BTU at PDBWiki (http://pdbwiki.org) MMDB (Entrez's Structure Database)

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