3IAP	Hydrolase	date	Jul 14, 2009
title	E. Coli (Lacz) Beta-Galactosidase (E416q)
authors	S.Lo, M.L.Dugdale, N.Jeerh, T.Ku, N.J.Roth, R.E.Huber
compound		source
Molecule: Beta-Galactosidase Chain: A, B, C, D Fragment: Beta-Galactosidase Ec: 3.2.1.23 Engineered: Yes Mutation: Yes		Organism_scientific: Escherichia Coli K-12 Organism_taxid: 83333 Gene: Lacz Expression_system: Escherichia Coli Expression_system_taxid: 562 Expression_system_strain: Lmg194 Expression_system_vector_type: Plasmid Expression_system_plasmid: Pbadhislacz
symmetry	Space Group: P 21 21 21	R_factor 0.181 R_Free 0.220
crystal cell	length a length b length c angle alpha angle beta angle gamma 151.230 162.340 202.060 90.00 90.00 90.00
method	X-Ray Diffraction	resolution	2.00 Å
ligand	BTB, DMS, MG, NA	enzyme	Hydrolase E.C.3.2.1.23 BRENDA
Gene Ontology	Chain Function Process Component A, D, C, B
Primary reference	Studies of Glu-416 Variants of beta-Galactosidase (E. coli) Show that the Active Site Mg(2+) is Not Important for Structure and Indicate that the Main Role of Mg (2+) is to Mediate Optimization of Active Site Chemistry., Lo S, Dugdale ML, Jeerh N, Ku T, Roth NJ, Huber RE, Protein J. 2009 Nov 21. PMID:19936901

Data retrieval

Asymmetric unit, PDB entry: [header only] [complete with coordinates] (742 Kb) [Save to disk] Biological Unit Coordinates (3iap.pdb1.gz) 730 Kb LPC: Ligand-Protein Contacts for 3IAP CSU: Contacts of Structural Units for 3IAP Structure Factors (2424 Kb) Retrieve 3IAP in mmCIF format [Save to disk] SEQRES to COORDINATES correlation for 3IAP from S2C, [Save to disk] Re-refined 3iap structure from PDB_REDO, a databank with updated and optimised macromolecular X-ray diffraction structure models

View 3IAP in 3D

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Visual 3D analysis of 3IAP

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 3IAP, from MSDmotif at EBI

Sequence-derived information

View one-letter amino acid or nucleotide sequence for each chain: [3iap_A] [3iap] [3iap_D] [3iap_B] [3iap_C] SWISS-PROT database: Domain organization of by SWISSPFAM Domain found in 3IAP: [Bgal_small_N ] by SMART

Other resources with information on 3IAP

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

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