1a6r
From Proteopedia
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| - | [[Image:1a6r.gif|left|200px]]<br /><applet load="1a6r" size=" | + | [[Image:1a6r.gif|left|200px]]<br /><applet load="1a6r" size="350" color="white" frame="true" align="right" spinBox="true" |
caption="1a6r, resolution 2.05Å" /> | caption="1a6r, resolution 2.05Å" /> | ||
'''GAL6 (YEAST BLEOMYCIN HYDROLASE) MUTANT C73A'''<br /> | '''GAL6 (YEAST BLEOMYCIN HYDROLASE) MUTANT C73A'''<br /> | ||
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==About this Structure== | ==About this Structure== | ||
| - | 1A6R 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 SO4 as [http://en.wikipedia.org/wiki/ligand ligand]. Known structural/functional Sites: <scene name='pdbsite=A73:Nucleophilic CYS Mutated To ALA'>A73</scene> and <scene name='pdbsite=NUL:Catalytic Residues'>NUL</scene>. Full crystallographic information is available from [http:// | + | 1A6R 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=SO4:'>SO4</scene> as [http://en.wikipedia.org/wiki/ligand ligand]. Known structural/functional Sites: <scene name='pdbsite=A73:Nucleophilic+CYS+Mutated+To+ALA'>A73</scene> and <scene name='pdbsite=NUL:Catalytic+Residues'>NUL</scene>. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1A6R OCA]. |
==Reference== | ==Reference== | ||
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[[Category: self-compartmentalizing protease]] | [[Category: self-compartmentalizing protease]] | ||
| - | ''Page seeded by [http:// | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sun Feb 3 09:29:23 2008'' |
Revision as of 07:29, 3 February 2008
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GAL6 (YEAST BLEOMYCIN HYDROLASE) MUTANT C73A
Overview
The Gal6 protease is in a class of cysteine peptidases identified by their, ability to inactivate the anti-cancer drug bleomycin. The protein forms a, barrel structure with the active sites embedded in a channel as in the, proteasome. In Gal6 the C termini lie in the active site clefts. We show, that Gal6 acts as a carboxypeptidase on its C terminus to convert itself, to an aminopeptidase and peptide ligase. The substrate specificity of the, peptidase activity is determined by the position of the C terminus of Gal6, rather than the sequence of the substrate. We propose a model to explain, these diverse activities and Gal6's singular ability to inactivate, bleomycin.
About this Structure
1A6R is a Single protein structure of sequence from Saccharomyces cerevisiae with as ligand. Known structural/functional Sites: and . Full crystallographic information is available from OCA.
Reference
The unusual active site of Gal6/bleomycin hydrolase can act as a carboxypeptidase, aminopeptidase, and peptide ligase., Zheng W, Johnston SA, Joshua-Tor L, Cell. 1998 Apr 3;93(1):103-9. PMID:9546396
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