3ECA	Hydrolase	date	Jul 02, 1993
title	Crystal Structure Of Escherichia Coli L-Asparaginase, An Enz In Cancer Therapy (Elspar)
authors	A.L.Swain, M.Jaskolski, D.Housset, J.K.M.Rao, A.Wlodawer
compound		source
Molecule: L-Asparaginase 2 Chain: A, B, C, D Ec: 3.5.1.1 Other_details: The Structure Was Determined For The Clinica Elspar. The Amino Acid Sequence Differed In Four Places Fro Sequence Of The K12 Strain Of E. Coli Asparaginase (V27a, N S252t, T263n).		Organism_scientific: Escherichia Coli Organism_taxid: 562
symmetry	Space Group: P 1 21 1	R_factor 0.111 R_Free NULL
crystal cell	length a length b length c angle alpha angle beta angle gamma 76.700 96.100 111.300 90.00 97.10 90.00
method	X-Ray Diffraction	resolution	2.40 Å
ligand	ASP	enzyme	Hydrolase E.C.3.5.1.1 BRENDA
related structures	by homologous chain: 1HO3, 1JJA
Gene Ontology	Chain Function Process Component A, D, C, B
Primary reference	Crystal structure of Escherichia coli L-asparaginase, an enzyme used in cancer therapy., Swain AL, Jaskolski M, Housset D, Rao JK, Wlodawer A, Proc Natl Acad Sci U S A 1993 Feb 15;90(4):1474-8. PMID:8434007

Data retrieval

Asymmetric unit, PDB entry: [header only] [complete with coordinates] (210 Kb) [Save to disk] Biological Unit Coordinates (3eca.pdb1.gz) 206 Kb LPC: Ligand-Protein Contacts for 3ECA CSU: Contacts of Structural Units for 3ECA Likely Quarternary Molecular Structure file(s) for 3ECA Structure Factors (283 Kb) Retrieve 3ECA in mmCIF format [Save to disk] SEQRES to COORDINATES correlation for 3ECA from S2C, [Save to disk] Re-refined 3eca structure from PDB_REDO, a databank with updated and optimised macromolecular X-ray diffraction structure models

View 3ECA 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 3ECA

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 3ECA, from MSDmotif at EBI Genome occurence of 3ECA's fold from GeneCensus Classification of representative domains in scop (Structural Classification of Proteins)     - Domain d3ecaa_, region A [Jmol] [rasmolscript] [script source]     - Domain d3ecab_, region B [Jmol] [rasmolscript] [script source]     - Domain d3ecac_, region C [Jmol] [rasmolscript] [script source]     - Domain d3ecad_, region D [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: [3eca_C] [3eca_A] [3eca_B] [3eca] [3eca_D] SWISS-PROT database: [P00805] Domain organization of [ASPG2_ECOLI] by SWISSPFAM Domain found in 3ECA: [Asparaginase ] by SMART

Other resources with information on 3ECA

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

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