1cos
From Proteopedia
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==Overview== | ==Overview== | ||
| - | The x-ray crystal structure of a peptide designed to form a | + | The x-ray crystal structure of a peptide designed to form a double-stranded parallel coiled coil shows that it is actually a triple-stranded coiled coil formed by three alpha-helices. Unlike the designed parallel coiled coil, the helices run up-up-down. The structure is stabilized by a distinctive hydrophobic interface consisting of eight layers. As in the design, each alpha-helix in the coiled coil contributes one leucine side chain to each layer. The structure suggests that hydrophobic interactions are a dominant factor in the stabilization of coiled coils. The stoichiometry and geometry of coiled coils are primarily determined by side chain packing in the solvent-inaccessible interior, but electrostatic interactions also contribute. |
==About this Structure== | ==About this Structure== | ||
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[[Category: Eisenberg, D.]] | [[Category: Eisenberg, D.]] | ||
[[Category: Lovejoy, B.]] | [[Category: Lovejoy, B.]] | ||
| - | [[Category: Mcrorie, D | + | [[Category: Mcrorie, D K.]] |
[[Category: ACE]] | [[Category: ACE]] | ||
[[Category: NH2]] | [[Category: NH2]] | ||
[[Category: alpha-helical bundle]] | [[Category: alpha-helical bundle]] | ||
| - | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Feb 21 12:08:11 2008'' |
Revision as of 10:08, 21 February 2008
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CRYSTAL STRUCTURE OF A SYNTHETIC TRIPLE-STRANDED ALPHA-HELICAL BUNDLE
Overview
The x-ray crystal structure of a peptide designed to form a double-stranded parallel coiled coil shows that it is actually a triple-stranded coiled coil formed by three alpha-helices. Unlike the designed parallel coiled coil, the helices run up-up-down. The structure is stabilized by a distinctive hydrophobic interface consisting of eight layers. As in the design, each alpha-helix in the coiled coil contributes one leucine side chain to each layer. The structure suggests that hydrophobic interactions are a dominant factor in the stabilization of coiled coils. The stoichiometry and geometry of coiled coils are primarily determined by side chain packing in the solvent-inaccessible interior, but electrostatic interactions also contribute.
About this Structure
1COS is a Protein complex structure of sequences from [1] with and as ligands. The following page contains interesting information on the relation of 1COS with [Designer Proteins]. Full crystallographic information is available from OCA.
Reference
Crystal structure of a synthetic triple-stranded alpha-helical bundle., Lovejoy B, Choe S, Cascio D, McRorie DK, DeGrado WF, Eisenberg D, Science. 1993 Feb 26;259(5099):1288-93. PMID:8446897
Page seeded by OCA on Thu Feb 21 12:08:11 2008
