1gq0: Difference between revisions
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|PDB= 1gq0 |SIZE=350|CAPTION= <scene name='initialview01'>1gq0</scene> | |PDB= 1gq0 |SIZE=350|CAPTION= <scene name='initialview01'>1gq0</scene> | ||
|SITE= | |SITE= | ||
|LIGAND= <scene name='pdbligand=ACE:ACETYL GROUP'>ACE</scene> | |LIGAND= <scene name='pdbligand=1AB:1,4-DIDEOXY-1,4-IMINO-D-ARABINITOL'>1AB</scene>, <scene name='pdbligand=ACE:ACETYL+GROUP'>ACE</scene>, <scene name='pdbligand=AIB:ALPHA-AMINOISOBUTYRIC+ACID'>AIB</scene>, <scene name='pdbligand=DIV:D-ISOVALINE'>DIV</scene>, <scene name='pdbligand=HYP:4-HYDROXYPROLINE'>HYP</scene>, <scene name='pdbligand=PDH:(2S)-2-AMINO-3-PHENYL-1-PROPANOL'>PDH</scene> | ||
|ACTIVITY= | |ACTIVITY= | ||
|GENE= | |GENE= | ||
|DOMAIN= | |||
|RELATEDENTRY= | |||
|RESOURCES=<span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1gq0 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1gq0 OCA], [http://www.ebi.ac.uk/pdbsum/1gq0 PDBsum], [http://www.rcsb.org/pdb/explore.do?structureId=1gq0 RCSB]</span> | |||
}} | }} | ||
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[[Category: Harris, R.]] | [[Category: Harris, R.]] | ||
[[Category: Wallace, B A.]] | [[Category: Wallace, B A.]] | ||
[[Category: antibiotic]] | [[Category: antibiotic]] | ||
[[Category: ion channel]] | [[Category: ion channel]] | ||
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[[Category: peptaibol]] | [[Category: peptaibol]] | ||
''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sun Mar 30 20:49:10 2008'' | ||
Revision as of 20:49, 30 March 2008
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| Ligands: | , , , , , | ||||||
| Resources: | FirstGlance, OCA, PDBsum, RCSB | ||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||
SOLUTION STRUCTURE OF ANTIAMOEBIN I, A MEMBRANE CHANNEL-FORMING POLYPEPTIDE; NMR, 20 STRUCTURES
OverviewOverview
Antiamoebin I is a membrane-active peptaibol produced by fungi of the species Emericellopsis which is capable of forming ion channels in membranes. Previous structure determinations by x-ray crystallography have shown the molecule is mostly helical, with a deep bend in the center of the polypeptide, and that the backbone structure is independent of the solvent used for crystallization. In this study, the solution structure of antiamoebin was determined by NMR spectroscopy in methanol, a solvent from which one of the crystal structures was determined. The ensemble of structures produced exhibit a right-handed helical C terminus and a left-handed helical conformation toward the N-terminus, in contrast to the completely right-handed helices found in the crystal structures. The NMR results also suggest that a "hinge" region exists, which gives flexibility to the polypeptide in the central region, and which could have functional implications for the membrane insertion process. A model for the membrane insertion and assembly process is proposed based on the antiamoebin solution and crystal structures, and is contrasted with the assembly and insertion mechanism proposed for other ion channel-forming polypeptides.
About this StructureAbout this Structure
1GQ0 is a Single protein structure of sequence from Emericellopsis sp.. Full crystallographic information is available from OCA.
ReferenceReference
Solution NMR studies of antiamoebin, a membrane channel-forming polypeptide., Galbraith TP, Harris R, Driscoll PC, Wallace BA, Biophys J. 2003 Jan;84(1):185-94. PMID:12524274
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