1RIQ	Ligase	date	Nov 17, 2003
title	The Crystal Structure Of The Catalytic Fragment Of The Alanyl-Trna Synthetase
authors	M.A.Swairjo, F.J.Otero, X.L.Yang, M.A.Lovato, R.J.Skene, D.E.Mcree, L.Ribas De Pouplana, P.Schimmel
compound		source
Molecule: Alanyl-Trna Synthetase Chain: A Synonym: Alanine--Trna Ligase, Alars Ec: 6.1.1.7 Engineered: Yes		Organism_scientific: Aquifex Aeolicus Organism_taxid: 63363 Gene: Alas, Aq_1293 Expression_system: Escherichia Coli Expression_system_taxid: 562 Expression_system_strain: B834(De3) Expression_system_vector_type: Plasmid Expression_system_plasmid: Pet20b+
symmetry	Space Group: P 41 21 2	R_factor 0.207 R_Free 0.251
crystal cell	length a length b length c angle alpha angle beta angle gamma 74.890 74.890 179.950 90.00 90.00 90.00
method	X-Ray Diffraction	resolution	2.14 Å
ligand	MSE	enzyme	Ligase E.C.6.1.1.7 BRENDA
related structures	by homologous chain: 1YFR, 1YFS
Gene	AQ
Gene Ontology	Chain Function Process Component A
Primary reference	Alanyl-tRNA synthetase crystal structure and design for acceptor-stem recognition., Swairjo MA, Otero FJ, Yang XL, Lovato MA, Skene RJ, McRee DE, de Pouplana LR, Schimmel P, Mol Cell 2004 Mar 26;13(6):829-41. PMID:15053876

Data retrieval

Asymmetric unit, PDB entry: [header only] [complete with coordinates] (86 Kb) [Save to disk] Biological Unit Coordinates (1riq.pdb1.gz) 81 Kb LPC: Ligand-Protein Contacts for 1RIQ CSU: Contacts of Structural Units for 1RIQ Likely Quarternary Molecular Structure file(s) for 1RIQ Structure Factors (235 Kb) Retrieve 1RIQ in mmCIF format [Save to disk] SEQRES to COORDINATES correlation for 1RIQ from S2C, [Save to disk] Re-refined 1riq structure from PDB_REDO, a databank with updated and optimised macromolecular X-ray diffraction structure models

View 1RIQ 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 1RIQ

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 1RIQ, from MSDmotif at EBI Classification of representative domains in scop (Structural Classification of Proteins)     - Domain d1riqa2, region A:1-236 [Jmol] [rasmolscript] [script source]     - Domain d1riqa1, region A:237-457 [Jmol] [rasmolscript] [script source]

Sequence-derived information

View one-letter amino acid or nucleotide sequence for each chain: [1riq] [1riq_A] SWISS-PROT database: [O67323] Domain organization of [SYA_AQUAE] by SWISSPFAM

Other resources with information on 1RIQ

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

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