2C2B	Lyase	date	Sep 27, 2005
title	Crystallographic Structure Of Arabidopsis Thaliana Threonine Complexed With Pyridoxal Phosphate And S-Adenosylmethionine
authors	C.Mas-Droux, V.Biou, R.Dumas
compound		source
Molecule: Threonine Synthase 1, Chloroplastic Chain: A, B, C, D, E, F Synonym: Threonine Synthase, Ts, Protein Methionine Over-Ac 2; Ec: 4.2.3.1 Engineered: Yes		Organism_scientific: Arabidopsis Thaliana Organism_common: Mouse-Ear Cress Organism_taxid: 3702 Expression_system: Escherichia Coli Expression_system_taxid: 511693 Expression_system_strain: Bl21 Expression_system_vector_type: Plasmid Expression_system_plasmid: Pet23d
symmetry	Space Group: C 1 2 1	R_factor 0.206 R_Free 0.248
crystal cell	length a length b length c angle alpha angle beta angle gamma 191.920 110.846 152.779 90.00 89.98 90.00
method	X-Ray Diffraction	resolution	2.60 Å
ligand	PLP, SAM, TRS	enzyme	Lyase E.C.4.2.3.1 BRENDA
related structures	by homologous chain: 1DBK, 2GFB, 32C2
Gene Ontology	Chain Function Process Component F, A, D, C, E, B
Primary reference	Allosteric threonine synthase. Reorganization of the pyridoxal phosphate site upon asymmetric activation through S-adenosylmethionine binding to a novel site., Mas-Droux C, Biou V, Dumas R, J Biol Chem. 2006 Feb 24;281(8):5188-96. Epub 2005 Nov 29. PMID:16319072

Data retrieval

Asymmetric unit, PDB entry: [header only] [complete with coordinates] (422 Kb) [Save to disk] Biological Unit Coordinates (2c2b.pdb1.gz) 140 Kb Biological Unit Coordinates (2c2b.pdb2.gz) 140 Kb Biological Unit Coordinates (2c2b.pdb3.gz) 142 Kb LPC: Ligand-Protein Contacts for 2C2B CSU: Contacts of Structural Units for 2C2B Likely Quarternary Molecular Structure file(s) for 2C2B Structure Factors (1406 Kb) Retrieve 2C2B in mmCIF format [Save to disk] SEQRES to COORDINATES correlation for 2C2B from S2C, [Save to disk] Re-refined 2c2b structure from PDB_REDO, a databank with updated and optimised macromolecular X-ray diffraction structure models

View 2C2B 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 2C2B

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 2C2B, from MSDmotif at EBI Classification of representative domains in scop (Structural Classification of Proteins)     - Domain d32c2b1, region B:1-119 [Jmol] [rasmolscript] [script source]     - Domain d32c2b2, region B:120-218 [Jmol] [rasmolscript] [script source]

Sequence-derived information

View one-letter amino acid or nucleotide sequence for each chain: [2c2b_E] [2c2b] [2c2b_B] [2c2b_A] [2c2b_C] [2c2b_D] [2c2b_F] SWISS-PROT database: [Q9S7B5] Domain organization of [THRC1_ARATH] by SWISSPFAM

Other resources with information on 2C2B

Community annotation for 2C2B at PDBWiki (http://pdbwiki.org) MMDB (Entrez's Structure Database)

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