2IBT	Transferase Dna	date	Sep 12, 2006
title	Crystal Structure Of The Adenine-Specific Dna Methyltransfer Complexed With The Cofactor Analog Aeta And A 10 Bp Dna Con Aminopurine At The Target Position And An Abasic Site Analo Target Base Partner Position
authors	T.Lenz, A.J.Scheidig, E.Weinhold
compound		source
Molecule: 5'-D(Gptptpcpgp(2pr)Ptpgptpc)-3' Chain: B, E Engineered: Yes		Synthetic: Yes Other_details: Solid-Phase Dna Synthesis Using Commercially Available Phosphoramidites;
Molecule: 5'-D(Gpapcpap(3dr)Pcpgp(6ma)Papc)-3' Chain: C, F Engineered: Yes		Synthetic: Yes Other_details: Solid-Phase Dna Synthesis Using Commercially Available Phosphoramidites;
Molecule: Modification Methylase Taqi Chain: A, D Synonym: Adenine-Specific Methyltransferase Taqi, M.Taqi Ec: 2.1.1.72 Engineered: Yes		Organism_scientific: Thermus Aquaticus Organism_taxid: 271 Strain: Yt1 Gene: Taqim Expression_system: Escherichia Coli Expression_system_taxid: 562 Expression_system_strain: Er2267 Expression_system_vector_type: Plasmid Expression_system_plasmid: Pa1mtaq-A49a
symmetry	Space Group: P 1 21 1	R_factor 0.167 R_Free 0.203
crystal cell	length a length b length c angle alpha angle beta angle gamma 59.339 68.699 114.022 90.00 92.09 90.00
method	X-Ray Diffraction	resolution	1.70 Å
ligand	2PR, 3DR, 6MA, GOL, NEA	enzyme	Transferase E.C.2.1.1.72 BRENDA
Gene Ontology	Chain Function Process Component A, D site-specific DNA-methyltran...
Primary reference	2-Aminopurine Flipped into the Active Site of the Adenine-Specific DNA Methyltransferase M.TaqI: Crystal Structures and Time-Resolved Fluorescence., Lenz T, Bonnist EY, Pljevaljcic G, Neely RK, Dryden DT, Scheidig AJ, Jones AC, Weinhold E, J Am Chem Soc. 2007 May 16;129(19):6240-6248. Epub 2007 Apr 25. PMID:17455934

Data retrieval

Asymmetric unit, PDB entry: [header only] [complete with coordinates] (175 Kb) [Save to disk] Biological Unit Coordinates (2ibt.pdb1.gz) 85 Kb Biological Unit Coordinates (2ibt.pdb2.gz) 86 Kb LPC: Ligand-Protein Contacts for 2IBT CSU: Contacts of Structural Units for 2IBT Likely Quarternary Molecular Structure file(s) for 2IBT Structure Factors (581 Kb) Retrieve 2IBT in mmCIF format [Save to disk] SEQRES to COORDINATES correlation for 2IBT from S2C, [Save to disk] Re-refined 2ibt structure from PDB_REDO, a databank with updated and optimised macromolecular X-ray diffraction structure models

View 2IBT 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 2IBT

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 2IBT, from MSDmotif at EBI

Sequence-derived information

View one-letter amino acid or nucleotide sequence for each chain: [2ibt_C] [2ibt_A] [2ibt_F] [2ibt_D] [2ibt] [2ibt_E] [2ibt_B] SWISS-PROT database: [P14385] Domain organization of [MTTA_THEAQ] by SWISSPFAM

Other resources with information on 2IBT

Community annotation for 2IBT at PDBWiki (http://pdbwiki.org) MMDB (Entrez's Structure Database)

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