1QGN	Lyase	date	May 02, 1999
title	Cystathionine Gamma-Synthase From Nicotiana Tabacum
authors	C.Steegborn, A.Messerschmidt, B.Laber, W.Streber, R.Huber, T.Clau
compound		source
Molecule: Protein (Cystathionine Gamma-Synthase) Chain: A, B, C, D, E, F, G, H Ec: 4.2.99.9 Engineered: Yes Other_details: Aldimine Linkage Between Pyridoxal 5'-Phosph And Lys261 Nz		Organism_scientific: Nicotiana Tabacum Organism_common: Common Tobacco Organism_taxid: 4097 Organelle: Chloroplast Gene: Metb Expression_system: Escherichia Coli Bl21(De3) Expression_system_taxid: 469008 Expression_system_strain: Bl21(De3) Expression_system_plasmid: Pet23c(+)
symmetry	Space Group: P 21 21 21	R_factor 0.201 R_Free 0.250
crystal cell	length a length b length c angle alpha angle beta angle gamma 120.000 129.500 309.800 90.00 90.00 90.00
method	X-Ray Diffraction	resolution	2.90 Å
ligand	PLP	enzyme	Lyase E.C.4.2.99.9 BRENDA
related structures	by homologous chain: 1AYY
Gene Ontology	Chain Function Process Component F, A, E, B, H, C, D, G
Primary reference	The crystal structure of cystathionine gamma-synthase from Nicotiana tabacum reveals its substrate and reaction specificity., Steegborn C, Messerschmidt A, Laber B, Streber W, Huber R, Clausen T, J Mol Biol 1999 Jul 30;290(5):983-96. PMID:10438597

Data retrieval

Asymmetric unit, PDB entry: [header only] [complete with coordinates] (494 Kb) [Save to disk] Biological Unit Coordinates (1qgn.pdb1.gz) 246 Kb Biological Unit Coordinates (1qgn.pdb2.gz) 247 Kb LPC: Ligand-Protein Contacts for 1QGN CSU: Contacts of Structural Units for 1QGN Likely Quarternary Molecular Structure file(s) for 1QGN Structure Factors (832 Kb) Retrieve 1QGN in mmCIF format [Save to disk] SEQRES to COORDINATES correlation for 1QGN from S2C, [Save to disk] Re-refined 1qgn structure from PDB_REDO, a databank with updated and optimised macromolecular X-ray diffraction structure models

View 1QGN 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 1QGN

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 1QGN, from MSDmotif at EBI Classification of representative domains in scop (Structural Classification of Proteins)     - Domain d1qgna_, region A [Jmol] [rasmolscript] [script source]     - Domain d1qgnb_, region B [Jmol] [rasmolscript] [script source]     - Domain d1qgnc_, region C [Jmol] [rasmolscript] [script source]     - Domain d1qgnd_, region D [Jmol] [rasmolscript] [script source]     - Domain d1qgne_, region E [Jmol] [rasmolscript] [script source]     - Domain d1qgnf_, region F [Jmol] [rasmolscript] [script source]     - Domain d1qgng_, region G [Jmol] [rasmolscript] [script source]     - Domain d1qgnh_, region H [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: [1qgn_B] [1qgn] [1qgn_D] [1qgn_A] [1qgn_C] [1qgn_H] [1qgn_F] [1qgn_E] [1qgn_G] SWISS-PROT database: [Q9ZPL5] Domain organization of [Q9ZPL5_TOBAC] by SWISSPFAM

Other resources with information on 1QGN

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

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