1K66	Signaling Protein	date	Oct 15, 2001
title	Crystal Structure Of The Cyanobacterial Phytochrome Response Regulator, Rcpb
authors	C.Benda, C.Scheufler, N.Tandeau De Marsac, W.Gaertner
compound		source
Molecule: Phytochrome Response Regulator Rcpb Chain: A, B Engineered: Yes		Organism_scientific: Tolypothrix Sp. Pcc 7601 Organism_taxid: 1188 Gene: Af309560 Expression_system: Escherichia Coli Expression_system_taxid: 562 Expression_system_strain: Bl21 (De3) Gold, Novagen Expression_system_vector_type: Plasmid Expression_system_plasmid: Pet28a(+)
symmetry	Space Group: P 41 21 2	R_factor 0.216 R_Free 0.250
crystal cell	length a length b length c angle alpha angle beta angle gamma 72.180 72.180 142.782 90.00 90.00 90.00
method	X-Ray Diffraction	resolution	1.75 Å
ligand	BME	enzyme
note	1K66 is a representative structure
Gene Ontology	Chain Function Process Component A, B
Primary reference	Crystal structures of two cyanobacterial response regulators in apo- and phosphorylated form reveal a novel dimerization motif of phytochrome-associated response regulators., Benda C, Scheufler C, Tandeau de Marsac N, Gartner W, Biophys J 2004 Jul;87(1):476-87. PMID:15240481

Data retrieval

Asymmetric unit, PDB entry: [header only] [complete with coordinates] (58 Kb) [Save to disk] Biological Unit Coordinates (1k66.pdb1.gz) 54 Kb LPC: Ligand-Protein Contacts for 1K66 CSU: Contacts of Structural Units for 1K66 Likely Quarternary Molecular Structure file(s) for 1K66 Structure Factors (304 Kb) Retrieve 1K66 in mmCIF format [Save to disk] SEQRES to COORDINATES correlation for 1K66 from S2C, [Save to disk] Re-refined 1k66 structure from PDB_REDO, a databank with updated and optimised macromolecular X-ray diffraction structure models

View 1K66 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 1K66

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 1K66, from MSDmotif at EBI Classification of representative domains in scop (Structural Classification of Proteins)     - Domain d1k66a_, region A [Jmol] [rasmolscript] [script source]     - Domain d1k66b_, region B [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: [1k66] [1k66_B] [1k66_A] SWISS-PROT database: [Q8RTM8] Domain organization of [Q8RTM8_9CYAN] by SWISSPFAM Domain found in 1K66: [REC ] by SMART

Other resources with information on 1K66

Community annotation for 1K66 at PDBWiki (http://pdbwiki.org) MMDB (Entrez's Structure Database)

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