1aes
From Proteopedia
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| - | [[Image:1aes. | + | [[Image:1aes.jpg|left|200px]]<br /><applet load="1aes" size="450" color="white" frame="true" align="right" spinBox="true" |
| - | <applet load="1aes" size="450" color="white" frame="true" align="right" spinBox="true" | + | |
caption="1aes, resolution 2.1Å" /> | caption="1aes, resolution 2.1Å" /> | ||
'''SPECIFICITY OF LIGAND BINDING TO A BURIED POLAR CAVITY AT THE ACTIVE SITE OF CYTOCHROME C PEROXIDASE (IMIDAZOLE)'''<br /> | '''SPECIFICITY OF LIGAND BINDING TO A BURIED POLAR CAVITY AT THE ACTIVE SITE OF CYTOCHROME C PEROXIDASE (IMIDAZOLE)'''<br /> | ||
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==About this Structure== | ==About this Structure== | ||
| - | 1AES 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 IMD 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] | + | 1AES 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 IMD 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://ispc.weizmann.ac.il/oca-bin/ocashort?id=1AES OCA]. |
==Reference== | ==Reference== | ||
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[[Category: transit peptide]] | [[Category: transit peptide]] | ||
| - | ''Page seeded by [http://ispc.weizmann.ac.il/oca OCA ] on | + | ''Page seeded by [http://ispc.weizmann.ac.il/oca OCA ] on Tue Dec 18 14:13:50 2007'' |
Revision as of 12:04, 18 December 2007
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SPECIFICITY OF LIGAND BINDING TO A BURIED POLAR CAVITY AT THE ACTIVE SITE OF CYTOCHROME C PEROXIDASE (IMIDAZOLE)
Overview
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 Structure
1AES is a Single protein structure of sequence from Saccharomyces cerevisiae with HEM and IMD 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.
Reference
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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