1SEG	Toxin	date	Feb 17, 2004
title	Crystal Structure Of A Toxin Chimera Between Lqh-Alpha-It Fr Scorpion Leiurus Quinquestriatus Hebraeus And Aah2 From And Australis Hector
authors	I.Karbat, F.Frolow, O.Froy, N.Gilles, L.Cohen, M.Turkov, D.Gordon, M.Gurevitz
compound		source
Molecule: Aah2: Lqh-Alpha-It (Face) Chimeric Toxin Chain: A Synonym: Aah II, Aahii, Aah2 Engineered: Yes Mutation: Yes		Organism_scientific: Androctonus Australis Hector Organism_taxid: 70175 Strain: Hector Expression_system: Escherichia Coli Bl21 Expression_system_taxid: 511693 Expression_system_strain: Bl21 Expression_system_vector_type: Plasmid Expression_system_plasmid: Pet-11
symmetry	Space Group: I 4 2 2	R_factor 0.153 R_Free 0.178
crystal cell	length a length b length c angle alpha angle beta angle gamma 74.523 74.523 56.973 90.00 90.00 90.00
method	X-Ray Diffraction	resolution	1.30 Å
ligand	NO3, PPI, SO4	enzyme
related structures	by homologous chain: 1PTX, 1SN4
Gene Ontology	Chain Function Process Component A toxin activity
Primary reference	Molecular basis of the high insecticidal potency of scorpion alpha-toxins., Karbat I, Frolow F, Froy O, Gilles N, Cohen L, Turkov M, Gordon D, Gurevitz M, J Biol Chem 2004 Jul 23;279(30):31679-86. Epub 2004 May 8. PMID:15133045

Data retrieval

Asymmetric unit, PDB entry: [header only] [complete with coordinates] (33 Kb) [Save to disk] Biological Unit Coordinates (1seg.pdb1.gz) 27 Kb LPC: Ligand-Protein Contacts for 1SEG CSU: Contacts of Structural Units for 1SEG Likely Quarternary Molecular Structure file(s) for 1SEG Structure Factors (135 Kb) Retrieve 1SEG in mmCIF format [Save to disk] SEQRES to COORDINATES correlation for 1SEG from S2C, [Save to disk] Re-refined 1seg structure from PDB_REDO, a databank with updated and optimised macromolecular X-ray diffraction structure models

View 1SEG 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 1SEG

Ramachandran plot from PDBSum

Structure-derived information

Conformational Epitope Prediction for 1SEG from the CEP Server. Dipole moment, from Dipole Server at Weizmann Institute 3D motif for 1SEG, from MSDmotif at EBI Classification of representative domains in scop (Structural Classification of Proteins)     - Domain d1sega_, region A [Jmol] [rasmolscript] [script source]

Sequence-derived information

View one-letter amino acid or nucleotide sequence for each chain: [1seg] [1seg_A] SWISS-PROT database: [P01484] Belongs to the long (4c-c) scorpion toxin (l-st) superfamily according to TCDB. Domain organization of [SCX2_ANDAU] by SWISSPFAM Domain found in 1SEG: [Knot1 ] by SMART

Other resources with information on 1SEG

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

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