1K6N	Photosynthesis	date	Oct 16, 2001
title	E(L212)A,D(L213)A Double Mutant Structure Of Photosynthetic Center From Rhodobacter Sphaeroides
authors	P.R.Pokkuluri, P.D.Laible, Y.L.Deng, T.N.Wong, D.K.Hanson, M.Sch
compound		source
Molecule: Photosynthetic Reaction Center L Subunit Chain: L Synonym: Reaction Center Protein L Chain Engineered: Yes Mutation: Yes		Organism_scientific: Rhodobacter Sphaeroides Organism_taxid: 1063 Gene: Pufqbalmx Expression_system: Rhodobacter Sphaeroides Expression_system_taxid: 1063 Expression_system_strain: Deltadelta11 Expression_system_vector_type: Plasmid Expression_system_plasmid: Prkhtl212-213aa
Molecule: Photosynthetic Reaction Center M Subunit Chain: M Synonym: Reaction Center Protein M Chain Engineered: Yes		Organism_scientific: Rhodobacter Sphaeroides Organism_taxid: 1063 Gene: Pufqbalmx Expression_system: Rhodobacter Sphaeroides Expression_system_taxid: 1063 Expression_system_strain: Deltadelta11 Expression_system_vector_type: Plasmid Expression_system_plasmid: Prkhtmhbgl
Molecule: Photosynthetic Reaction Center H Subunit Chain: H Synonym: Reaction Center Protein H Chain Engineered: Yes		Organism_scientific: Rhodobacter Sphaeroides Organism_taxid: 1063 Gene: Pufqbalmx Expression_system: Rhodobacter Sphaeroides Expression_system_taxid: 1063 Expression_system_strain: Deltadelta11 Expression_system_vector_type: Plasmid Expression_system_plasmid: Prkhtmhbgl
symmetry	Space Group: P 31 2 1	R_factor 0.203 R_Free 0.207
crystal cell	length a length b length c angle alpha angle beta angle gamma 141.500 141.500 187.400 90.00 90.00 120.00
method	X-Ray Diffraction	resolution	3.10 Å
ligand	BCL, BPH, CDL, FE, LDA, SPN, U10	enzyme
Gene Ontology	Chain Function Process Component H electron transporter, transf... L M
Primary reference	The structure of a mutant photosynthetic reaction center shows unexpected changes in main chain orientations and quinone position., Pokkuluri PR, Laible PD, Deng YL, Wong TN, Hanson DK, Schiffer M, Biochemistry 2002 May 14;41(19):5998-6007. PMID:11993994

Data retrieval

Asymmetric unit, PDB entry: [header only] [complete with coordinates] (157 Kb) [Save to disk] Biological Unit Coordinates (1k6n.pdb1.gz) 147 Kb LPC: Ligand-Protein Contacts for 1K6N CSU: Contacts of Structural Units for 1K6N Likely Quarternary Molecular Structure file(s) for 1K6N Structure Factors (527 Kb) Retrieve 1K6N in mmCIF format [Save to disk] SEQRES to COORDINATES correlation for 1K6N from S2C, [Save to disk] Re-refined 1k6n structure from PDB_REDO, a databank with updated and optimised macromolecular X-ray diffraction structure models

View 1K6N 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 1K6N

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 1K6N, from MSDmotif at EBI Classification of representative domains in scop (Structural Classification of Proteins)     - Domain d1k6nh2, region H:11-35 [Jmol] [rasmolscript] [script source]     - Domain d1k6nh1, region H:36-250 [Jmol] [rasmolscript] [script source]     - Domain d1k6nl_, region L [Jmol] [rasmolscript] [script source]     - Domain d1k6nm_, region M [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: [1k6n_M] [1k6n_L] [1k6n_H] [1k6n] SWISS-PROT database: [P0C0Y7] [P0C0Y8] [P0C0Y9] Belongs to the photosynthetic reaction center (prc) family according to TCDB. Domain organization of [RCEH_RHOSH] [RCEL_RHOSH] [RCEM_RHOSH] by SWISSPFAM

Other resources with information on 1K6N

Community annotation for 1K6N at PDBWiki (http://pdbwiki.org) MMDB (Entrez's Structure Database)

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