3IHQ	Transcription Transferase	date	Jul 30, 2009
title	Crystal Structure Of Reduced C10s Spx In Complex With The Al Terminal Domain Of Rna Polymeras
authors	K.J.Newberry, R.G.Brennan
compound		source
Molecule: Regulatory Protein Spx Chain: A Engineered: Yes Mutation: Yes		Organism_scientific: Bacillus Subtilis Organism_taxid: 1423 Gene: Bsu11500, Spxa Expression_system: Escherichia Coli Expression_system_taxid: 562 Expression_system_strain: Bl21(De3) Expression_system_vector_type: Plasmid Expression_system_plasmid: Pproex
Molecule: Dna-Directed Rna Polymerase Subunit Alpha Chain: B Fragment: Unp Residues 245-314 Synonym: Rnap Subunit Alpha, Transcriptase Subunit Alpha, R Polymerase Subunit Alpha; Ec: 2.7.7.6 Engineered: Yes		Organism_scientific: Bacillus Subtilis Organism_taxid: 1423 Gene: Bsu01430, Rpoa Expression_system: Escherichia Coli Expression_system_taxid: 562 Expression_system_strain: Rosetta 2 (Bl21) Expression_system_vector_type: Plasmid Expression_system_plasmid: Pet28a
symmetry	Space Group: P 1	R_factor 0.236 R_Free 0.278
crystal cell	length a length b length c angle alpha angle beta angle gamma 29.390 32.220 50.580 106.07 91.62 103.77
method	X-Ray Diffraction	resolution	1.90 Å
ligand	IMD	enzyme	Transferase E.C.2.7.7.6 BRENDA
Gene Ontology	Chain Function Process Component A B
Primary reference	Promoter recognition by a complex of Spx and the C-terminal domain of the RNA polymerase alpha subunit., Nakano MM, Lin A, Zuber CS, Newberry KJ, Brennan RG, Zuber P, PLoS One. 2010 Jan 13;5(1):e8664. PMID:20084284

Data retrieval

Asymmetric unit, PDB entry: [header only] [complete with coordinates] (36 Kb) [Save to disk] Biological Unit Coordinates (3ihq.pdb1.gz) 31 Kb LPC: Ligand-Protein Contacts for 3IHQ CSU: Contacts of Structural Units for 3IHQ Structure Factors (94 Kb) Retrieve 3IHQ in mmCIF format [Save to disk] SEQRES to COORDINATES correlation for 3IHQ from S2C, [Save to disk] Re-refined 3ihq structure from PDB_REDO, a databank with updated and optimised macromolecular X-ray diffraction structure models

View 3IHQ 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 3IHQ

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 3IHQ, from MSDmotif at EBI

Sequence-derived information

View one-letter amino acid or nucleotide sequence for each chain: [3ihq_A] [3ihq] [3ihq_B] SWISS-PROT database: Domain organization of by SWISSPFAM

Other resources with information on 3IHQ

Community annotation for 3IHQ at PDBWiki (http://pdbwiki.org) MMDB (Entrez's Structure Database)

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