1ECB	Transferase	date	Jul 15, 1997
title	Escherichia Coli Glutamine Phosphoribosylpyrophosphate (Prpp Amidotransferase Complexed With 2 Gmp, 1 Mg Per Subunit
authors	J.M.Krahn, J.L.Smith
compound		source
Molecule: Glutamine Phosphoribosylpyrophosphate Amidotransf Chain: A, B, C, D Ec: 2.4.2.14 Engineered: Yes		Organism_scientific: Escherichia Coli Organism_taxid: 562 Gene: Purf Expression_system: Escherichia Coli Bl21(De3) Expression_system_taxid: 469008 Expression_system_strain: Bl21 (De3) Expression_system_plasmid: Pt7f1
symmetry	Space Group: P 21 21 21	R_factor 0.208 R_Free 0.291
crystal cell	length a length b length c angle alpha angle beta angle gamma 95.800 113.200 199.600 90.00 90.00 90.00
method	X-Ray Diffraction	resolution	2.70 Å
ligand	5GP, MG	enzyme	Transferase E.C.2.4.2.14 BRENDA
related structures	by homologous chain: 1ECJ
Gene Ontology	Chain Function Process Component A, D, C, B
Primary reference	Coupled formation of an amidotransferase interdomain ammonia channel and a phosphoribosyltransferase active site., Krahn JM, Kim JH, Burns MR, Parry RJ, Zalkin H, Smith JL, Biochemistry 1997 Sep 16;36(37):11061-8. PMID:9333323

Data retrieval

Asymmetric unit, PDB entry: [header only] [complete with coordinates] (308 Kb) [Save to disk] Biological Unit Coordinates (1ecb.pdb1.gz) 153 Kb Biological Unit Coordinates (1ecb.pdb2.gz) 153 Kb Biological Unit Coordinates (1ecb.pdb3.gz) 300 Kb Biological Unit Coordinates (1ecb.pdb4.gz) 301 Kb LPC: Ligand-Protein Contacts for 1ECB CSU: Contacts of Structural Units for 1ECB Likely Quarternary Molecular Structure file(s) for 1ECB Retrieve 1ECB in mmCIF format [Save to disk] SEQRES to COORDINATES correlation for 1ECB from S2C, [Save to disk]

View 1ECB 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 1ECB

Ramachandran plot from PDBSum

Structure-derived information

Dipole moment, from Dipole Server at Weizmann Institute 3D motif for 1ECB, from MSDmotif at EBI Genome occurence of 1ECB's fold from GeneCensus Classification of representative domains in scop (Structural Classification of Proteins)     - Domain d1ecba2, region A:1-249 [Jmol] [rasmolscript] [script source]     - Domain d1ecba1, region A:250-481 [Jmol] [rasmolscript] [script source]     - Domain d1ecbb2, region B:1-249 [Jmol] [rasmolscript] [script source]     - Domain d1ecbb1, region B:250-478 [Jmol] [rasmolscript] [script source]     - Domain d1ecbc2, region C:1-249 [Jmol] [rasmolscript] [script source]     - Domain d1ecbc1, region C:250-482 [Jmol] [rasmolscript] [script source]     - Domain d1ecbd2, region D:1-249 [Jmol] [rasmolscript] [script source]     - Domain d1ecbd1, region D:250-481 [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: [1ecb] [1ecb_A] [1ecb_C] [1ecb_D] [1ecb_B] SWISS-PROT database: [P0AG16] Domain organization of [PUR1_ECOLI] by SWISSPFAM

Other resources with information on 1ECB

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

Movements, Movies and Images

Domain movements in 1ECB from the Database of Macromolecular Movements. Images from IMB Jena Image Library of Biological Macromolecules.

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