1B4K	Lyase	date	Dec 22, 1998
title	High Resolution Crystal Structure Of A Mg2-Dependent 5-Amino Acid Dehydratase
authors	N.Frankenberg, D.Jahn, D.W.Heinz
compound		source
Molecule: Protein (5-Aminolevulinic Acid Dehydratase) Chain: A, B Synonym: Porphobilinogen Synthase Ec: 4.2.1.24 Engineered: Yes Other_details: Schiff Base Link Between Atom Nz Of Lys260 A Of Levulinic Acid		Organism_scientific: Pseudomonas Aeruginosa Organism_taxid: 208964 Strain: Pao1 Atcc: Atcc 15692 Collection: Atcc 15692 Cellular_location: Cytoplasm Gene: Hemb Expression_system: Escherichia Coli Bl21(De3) Expression_system_taxid: 469008 Expression_system_strain: Bl21-De3 Expression_system_cellular_location: Cytoplasm Expression_system_vector_type: Plasmid Expression_system_plasmid: Pgex-6p-1 Expression_system_gene: Hemb
symmetry	Space Group: P 4 21 2	R_factor 0.178 R_Free 0.208
crystal cell	length a length b length c angle alpha angle beta angle gamma 128.240 128.240 86.220 90.00 90.00 90.00
method	X-Ray Diffraction	resolution	1.67 Å
ligand	MG, SHF, SO4	enzyme	Lyase E.C.4.2.1.24 BRENDA
related structures	by homologous chain: 1GZG, 1W56
Gene Ontology	Chain Function Process Component A, B
Primary reference	High resolution crystal structure of a Mg2+-dependent porphobilinogen synthase., Frankenberg N, Erskine PT, Cooper JB, Shoolingin-Jordan PM, Jahn D, Heinz DW, J Mol Biol 1999 Jun 11;289(3):591-602. PMID:10356331

Data retrieval

Asymmetric unit, PDB entry: [header only] [complete with coordinates] (116 Kb) [Save to disk] Biological Unit Coordinates (1b4k.pdb1.gz) 436 Kb LPC: Ligand-Protein Contacts for 1B4K CSU: Contacts of Structural Units for 1B4K Likely Quarternary Molecular Structure file(s) for 1B4K Structure Factors (609 Kb) Retrieve 1B4K in mmCIF format [Save to disk] SEQRES to COORDINATES correlation for 1B4K from S2C, [Save to disk] Re-refined 1b4k structure from PDB_REDO, a databank with updated and optimised macromolecular X-ray diffraction structure models

View 1B4K 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 1B4K

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 1B4K, from MSDmotif at EBI Classification of representative domains in scop (Structural Classification of Proteins)     - Domain d1b4ka_, region A [Jmol] [rasmolscript] [script source]     - Domain d1b4kb_, region 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: [1b4k_B] [1b4k_A] [1b4k] SWISS-PROT database: [Q59643] Domain organization of [HEM2_PSEAE] by SWISSPFAM Domain found in 1B4K: [ALAD ] by SMART

Other resources with information on 1B4K

Community annotation for 1B4K at PDBWiki (http://pdbwiki.org) MMDB (Entrez's Structure Database)

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