1ac8: Difference between revisions
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[[Image:1ac8.gif|left|200px]]<br /><applet load="1ac8" size=" | [[Image:1ac8.gif|left|200px]]<br /><applet load="1ac8" size="350" color="white" frame="true" align="right" spinBox="true" | ||
caption="1ac8, resolution 2.1Å" /> | caption="1ac8, resolution 2.1Å" /> | ||
'''VARIATION IN THE STRENGTH OF A CH TO O HYDROGEN BOND IN AN ARTIFICIAL PROTEIN CAVITY (3,4,5-TRIMETHYLTHIAZOLE)'''<br /> | '''VARIATION IN THE STRENGTH OF A CH TO O HYDROGEN BOND IN AN ARTIFICIAL PROTEIN CAVITY (3,4,5-TRIMETHYLTHIAZOLE)'''<br /> | ||
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==About this Structure== | ==About this Structure== | ||
1AC8 is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Saccharomyces_cerevisiae Saccharomyces cerevisiae] with HEM and TMZ as [http://en.wikipedia.org/wiki/ligands ligands]. Active as [http://en.wikipedia.org/wiki/Cytochrome-c_peroxidase Cytochrome-c peroxidase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=1.11.1.5 1.11.1.5] Known structural/functional Site: <scene name='pdbsite=AVE:Removal Of TRP 191 Forms An Internal Cavity Below The He ...'>AVE</scene>. Full crystallographic information is available from [http:// | 1AC8 is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Saccharomyces_cerevisiae Saccharomyces cerevisiae] with <scene name='pdbligand=HEM:'>HEM</scene> and <scene name='pdbligand=TMZ:'>TMZ</scene> as [http://en.wikipedia.org/wiki/ligands ligands]. Active as [http://en.wikipedia.org/wiki/Cytochrome-c_peroxidase Cytochrome-c peroxidase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=1.11.1.5 1.11.1.5] Known structural/functional Site: <scene name='pdbsite=AVE:Removal+Of+TRP+191+Forms+An+Internal+Cavity+Below+The+He+...'>AVE</scene>. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1AC8 OCA]. | ||
==Reference== | ==Reference== | ||
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[[Category: transit peptide]] | [[Category: transit peptide]] | ||
''Page seeded by [http:// | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sun Feb 3 09:29:46 2008'' | ||
Revision as of 10:29, 3 February 2008
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VARIATION IN THE STRENGTH OF A CH TO O HYDROGEN BOND IN AN ARTIFICIAL PROTEIN CAVITY (3,4,5-TRIMETHYLTHIAZOLE)
OverviewOverview
Conformational changes that gate the access of substrates or ligands to an, active site are important features of enzyme function. In this report, we, describe an unusual example of a structural rearrangement near a buried, artificial cavity in cytochrome c peroxidase that occurs on binding, protonated benzimidazole. A hinged main-chain rotation at two residues, (Pro 190 and Asn 195) results in a surface loop rearrangement that opens a, large solvent-accessible channel for the entry of ligands to an otherwise, inaccessible binding site. The trapping of this alternate conformational, state provides a unique view of the extent to which protein dynamics can, allow small molecule penetration into buried protein cavities.
About this StructureAbout this Structure
1AC8 is a Single protein structure of sequence from Saccharomyces cerevisiae with and as ligands. Active as Cytochrome-c peroxidase, with EC number 1.11.1.5 Known structural/functional Site: . Full crystallographic information is available from OCA.
ReferenceReference
A ligand-gated, hinged loop rearrangement opens a channel to a buried artificial protein cavity., Fitzgerald MM, Musah RA, McRee DE, Goodin DB, Nat Struct Biol. 1996 Jul;3(7):626-31. PMID:8673607
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