1LBI	Transcription Regulation	date	Feb 17, 1996
title	Lac Repressor
authors	M.Lewis, G.Chang, N.C.Horton, M.A.Kercher, H.C.Pace, P.Lu
compound		source
Molecule: Lac Repressor Chain: A, B, C, D Engineered: Yes		Organism_scientific: Escherichia Coli Organism_taxid: 562 Strain: Gm1 Gene: Laci Expression_system: Escherichia Coli Expression_system_taxid: 562 Expression_system_vector_type: Lac Expression_system_plasmid: Piq Expression_system_gene: Laci
symmetry	Space Group: C 1 2 1	R_factor 0.250 R_Free NULL
crystal cell	length a length b length c angle alpha angle beta angle gamma 160.300 73.300 147.800 90.00 120.30 90.00
method	X-Ray Diffraction	resolution	2.70 Å
related structures	by homologous chain: 1EFA, 1JYF
Gene Ontology	Chain Function Process Component A, D, C, B
Primary reference	Crystal structure of the lactose operon repressor and its complexes with DNA and inducer., Lewis M, Chang G, Horton NC, Kercher MA, Pace HC, Schumacher MA, Brennan RG, Lu P, Science 1996 Mar 1;271(5253):1247-54. PMID:8638105

Data retrieval

Asymmetric unit, PDB entry: [header only] [complete with coordinates] (154 Kb) [Save to disk] Biological Unit Coordinates (1lbi.pdb1.gz) 148 Kb CSU: Contacts of Structural Units for 1LBI Likely Quarternary Molecular Structure file(s) for 1LBI Retrieve 1LBI in mmCIF format [Save to disk] SEQRES to COORDINATES correlation for 1LBI from S2C, [Save to disk]

View 1LBI in 3D

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Visual 3D analysis of 1LBI

Ramachandran plot from PDBSum

Structure-derived information

Dipole moment, from Dipole Server at Weizmann Institute 3D motif for 1LBI, from MSDmotif at EBI Genome occurence of 1LBI's fold from GeneCensus Classification of representative domains in scop (Structural Classification of Proteins)     - Domain d1lbia_, region A [Jmol] [rasmolscript] [script source]     - Domain d1lbib_, region B [Jmol] [rasmolscript] [script source]     - Domain d1lbic_, region C [Jmol] [rasmolscript] [script source]     - Domain d1lbid_, 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: [1lbi_A] [1lbi] [1lbi_C] [1lbi_D] [1lbi_B] SWISS-PROT database: [P03023] Domain organization of [LACI_ECOLI] by SWISSPFAM Domain found in 1LBI: [HTH_LACI ] by SMART

Other resources with information on 1LBI

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

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