1S5C	Transferase,Toxin	date	Jan 20, 2004
title	Cholera Holotoxin With An A-Subunit Y30s Mutation, Crystal F
authors	C.J.O'Neal, E.I.Amaya, M.G.Jobling, R.K.Holmes, W.G.Hol
compound		source
Molecule: Cholera Enterotoxin, A Chain Chain: A Synonym: Nad(+)--Diphthamide Adp- Ribosyltransferase, Chole Enterotoxin A Subunit; Ec: 2.4.2.36 Engineered: Yes Mutation: Yes		Organism_scientific: Vibrio Cholerae Organism_taxid: 666 Gene: Ctxa, Toxa, Vc1457 Expression_system: Escherichia Coli Bl21(De3) Expression_system_taxid: 469008 Expression_system_strain: Bl21(De3) Expression_system_vector_type: Plasmid Expression_system_plasmid: Peia154
Molecule: Cholera Enterotoxin B-Subunit Chain: D, E, F, G, H Engineered: Yes		Organism_scientific: Vibrio Cholerae Organism_taxid: 666 Gene: Ctxb, Toxb, Vc1456 Expression_system: Escherichia Coli Bl21(De3) Expression_system_taxid: 469008 Expression_system_strain: Bl21(De3) Expression_system_vector_type: Plasmid Expression_system_plasmid: Peia154
symmetry	Space Group: P 1 21 1	R_factor 0.195 R_Free 0.262
crystal cell	length a length b length c angle alpha angle beta angle gamma 58.818 85.199 71.255 90.00 104.48 90.00
method	X-Ray Diffraction	resolution	2.50 Å
ligand	NA	enzyme	Transferase E.C.2.4.2.36 BRENDA
related structures	by homologous chain: 1HTL, 1XTC
Gene Ontology	Chain Function Process Component A toxin activity H, F, D, G, E host cell surface binding toxin activity
Primary reference	Crystal Structures of an Intrinsically Active Cholera Toxin Mutant Yield Insight into the Toxin Activation Mechanism(,)., O'Neal CJ, Amaya EI, Jobling MG, Holmes RK, Hol WG, Biochemistry 2004 Apr 6;43(13):3772-3782. PMID:15049684

Data retrieval

Asymmetric unit, PDB entry: [header only] [complete with coordinates] (119 Kb) [Save to disk] Biological Unit Coordinates (1s5c.pdb1.gz) 112 Kb LPC: Ligand-Protein Contacts for 1S5C CSU: Contacts of Structural Units for 1S5C Likely Quarternary Molecular Structure file(s) for 1S5C Structure Factors (326 Kb) Retrieve 1S5C in mmCIF format [Save to disk] SEQRES to COORDINATES correlation for 1S5C from S2C, [Save to disk] Re-refined 1s5c structure from PDB_REDO, a databank with updated and optimised macromolecular X-ray diffraction structure models

View 1S5C 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 1S5C

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 1S5C, from MSDmotif at EBI Classification of representative domains in scop (Structural Classification of Proteins)     - Domain d1s5ca_, region A [Jmol] [rasmolscript] [script source]     - Domain d1s5cd_, region D [Jmol] [rasmolscript] [script source]     - Domain d1s5ce_, region E [Jmol] [rasmolscript] [script source]     - Domain d1s5cf_, region F [Jmol] [rasmolscript] [script source]     - Domain d1s5cg_, region G [Jmol] [rasmolscript] [script source]     - Domain d1s5ch_, region H [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: [1s5c_F] [1s5c_D] [1s5c_E] [1s5c_G] [1s5c_A] [1s5c_H] [1s5c] SWISS-PROT database: [P01555] [P01556] Domain organization of [CHTA_VIBCH] [CHTB_VIBCH] by SWISSPFAM

Other resources with information on 1S5C

Community annotation for 1S5C at PDBWiki (http://pdbwiki.org) MMDB (Entrez's Structure Database)

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