3IAQ	Hydrolase	date	Jul 14, 2009
title	E. Coli (Lacz) Beta-Galactosidase (E416v)
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 0.184 R_Free 0.253
crystal cell	length a length b length c angle alpha angle beta angle gamma 149.380 168.300 200.730 90.00 90.00 90.00
method	X-Ray Diffraction	resolution	2.70 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] (705 Kb) [Save to disk] Biological Unit Coordinates (3iaq.pdb1.gz) 694 Kb LPC: Ligand-Protein Contacts for 3IAQ CSU: Contacts of Structural Units for 3IAQ Structure Factors (1036 Kb) Retrieve 3IAQ in mmCIF format [Save to disk] SEQRES to COORDINATES correlation for 3IAQ from S2C, [Save to disk] Re-refined 3iaq structure from PDB_REDO, a databank with updated and optimised macromolecular X-ray diffraction structure models

View 3IAQ 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 3IAQ

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 3IAQ, from MSDmotif at EBI

Sequence-derived information

View one-letter amino acid or nucleotide sequence for each chain: [3iaq_D] [3iaq_B] [3iaq] [3iaq_A] [3iaq_C] SWISS-PROT database: Domain organization of by SWISSPFAM Domain found in 3IAQ: [Bgal_small_N ] by SMART

Other resources with information on 3IAQ

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

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