1XRA	Methyltransferase	date	Oct 26, 1995
title	Crystal Structure Of S-Adenosylmethionine Synthetase
authors	F.Takusagawa, S.Kamitori, S.Misaki, G.D.Markham
compound		source
Molecule: S-Adenosylmethionine Synthetase Chain: A Synonym: Mat, Atp:L-Methionine S-Adenosyltransferase Ec: 2.5.1.6		Organism_scientific: Escherichia Coli Organism_taxid: 562
symmetry	Space Group: P 62 2 2	R_factor 0.189 R_Free 0.260
crystal cell	length a length b length c angle alpha angle beta angle gamma 128.900 128.900 139.800 90.00 90.00 120.00
method	X-Ray Diffraction	resolution	3.00 Å
ligand	K, MG, PO4	enzyme	Transferase E.C.2.5.1.6 BRENDA
related structures	by homologous chain: 1XRB, 1XRC
Gene Ontology	Chain Function Process Component A
Primary reference	Crystal structure of S-adenosylmethionine synthetase., Takusagawa F, Kamitori S, Misaki S, Markham GD, J Biol Chem 1996 Jan 5;271(1):136-47. PMID:8550549

Data retrieval

Asymmetric unit, PDB entry: [header only] [complete with coordinates] (75 Kb) [Save to disk] Biological Unit Coordinates (1xra.pdb1.gz) 137 Kb Biological Unit Coordinates (1xra.pdb2.gz) 274 Kb LPC: Ligand-Protein Contacts for 1XRA CSU: Contacts of Structural Units for 1XRA Likely Quarternary Molecular Structure file(s) for 1XRA Retrieve 1XRA in mmCIF format [Save to disk] SEQRES to COORDINATES correlation for 1XRA from S2C, [Save to disk]

View 1XRA 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 1XRA

Ramachandran plot from PDBSum

Structure-derived information

Dipole moment, from Dipole Server at Weizmann Institute 3D motif for 1XRA, from MSDmotif at EBI Genome occurence of 1XRA's fold from GeneCensus Classification of representative domains in scop (Structural Classification of Proteins)     - Domain d1xra_1, region 1-101 [Jmol] [rasmolscript] [script source]     - Domain d1xra_2, region 108-231 [Jmol] [rasmolscript] [script source]     - Domain d1xra_3, region 232-383 [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: [1xra_A] [1xra] SWISS-PROT database: [P0A817] Domain organization of [METK_ECOLI] by SWISSPFAM

Other resources with information on 1XRA

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

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