1fl1
From Proteopedia
(New page: 200px<br /><applet load="1fl1" size="450" color="white" frame="true" align="right" spinBox="true" caption="1fl1, resolution 2.20Å" /> '''KSHV PROTEASE'''<br ...) |
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| - | [[Image:1fl1.jpg|left|200px]]<br /><applet load="1fl1" size=" | + | [[Image:1fl1.jpg|left|200px]]<br /><applet load="1fl1" size="350" color="white" frame="true" align="right" spinBox="true" |
caption="1fl1, resolution 2.20Å" /> | caption="1fl1, resolution 2.20Å" /> | ||
'''KSHV PROTEASE'''<br /> | '''KSHV PROTEASE'''<br /> | ||
==Overview== | ==Overview== | ||
| - | The structure of Kaposi's sarcoma-associated herpesvirus protease (KSHV | + | The structure of Kaposi's sarcoma-associated herpesvirus protease (KSHV Pr), at 2.2 A resolution, reveals the active-site geometry and defines multiple possible target sites for drug design against a human cancer-producing virus. The catalytic triad of KSHV Pr, (Ser114, His46, and His157) and transition-state stabilization site are arranged as in other structurally characterized herpesviral proteases. The distal histidine-histidine hydrogen bond is solvent accessible, unlike the situation in other classes of serine proteases. As in all herpesviral proteases, the enzyme is active only as a weakly associated dimer (K(d) approximately 2 microM), and inactive as a monomer. Therefore, both the active site and dimer interface are potential targets for antiviral drug design. The dimer interface in KSHV Pr is compared with the interface of other herpesviral proteases. Two conserved arginines (Arg209), one from each monomer, are buried within the same region of the dimer interface. We propose that this conserved arginine may provide a destabilizing element contributing to the tuned micromolar dissociation of herpesviral protease dimers. |
==About this Structure== | ==About this Structure== | ||
| - | 1FL1 is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Human_herpesvirus_4 Human herpesvirus 4] with K as [http://en.wikipedia.org/wiki/ligand ligand]. Full crystallographic information is available from [http:// | + | 1FL1 is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Human_herpesvirus_4 Human herpesvirus 4] with <scene name='pdbligand=K:'>K</scene> as [http://en.wikipedia.org/wiki/ligand ligand]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1FL1 OCA]. |
==Reference== | ==Reference== | ||
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[[Category: Human herpesvirus 4]] | [[Category: Human herpesvirus 4]] | ||
[[Category: Single protein]] | [[Category: Single protein]] | ||
| - | [[Category: Craik, C | + | [[Category: Craik, C S.]] |
| - | [[Category: Pray, T | + | [[Category: Pray, T R.]] |
| - | [[Category: Reiling, K | + | [[Category: Reiling, K K.]] |
| - | [[Category: Stroud, R | + | [[Category: Stroud, R M.]] |
[[Category: K]] | [[Category: K]] | ||
[[Category: antiviral drug design]] | [[Category: antiviral drug design]] | ||
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[[Category: serine protease]] | [[Category: serine protease]] | ||
| - | ''Page seeded by [http:// | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Feb 21 12:39:46 2008'' |
Revision as of 10:39, 21 February 2008
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KSHV PROTEASE
Overview
The structure of Kaposi's sarcoma-associated herpesvirus protease (KSHV Pr), at 2.2 A resolution, reveals the active-site geometry and defines multiple possible target sites for drug design against a human cancer-producing virus. The catalytic triad of KSHV Pr, (Ser114, His46, and His157) and transition-state stabilization site are arranged as in other structurally characterized herpesviral proteases. The distal histidine-histidine hydrogen bond is solvent accessible, unlike the situation in other classes of serine proteases. As in all herpesviral proteases, the enzyme is active only as a weakly associated dimer (K(d) approximately 2 microM), and inactive as a monomer. Therefore, both the active site and dimer interface are potential targets for antiviral drug design. The dimer interface in KSHV Pr is compared with the interface of other herpesviral proteases. Two conserved arginines (Arg209), one from each monomer, are buried within the same region of the dimer interface. We propose that this conserved arginine may provide a destabilizing element contributing to the tuned micromolar dissociation of herpesviral protease dimers.
About this Structure
1FL1 is a Single protein structure of sequence from Human herpesvirus 4 with as ligand. Full crystallographic information is available from OCA.
Reference
Functional consequences of the Kaposi's sarcoma-associated herpesvirus protease structure: regulation of activity and dimerization by conserved structural elements., Reiling KK, Pray TR, Craik CS, Stroud RM, Biochemistry. 2000 Oct 24;39(42):12796-803. PMID:11041844
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