1iof
From Proteopedia
(New page: 200px<br /><applet load="1iof" size="450" color="white" frame="true" align="right" spinBox="true" caption="1iof, resolution 2.2Å" /> '''X-RAY CRYSTALLINE STR...) |
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| - | [[Image:1iof.gif|left|200px]]<br /><applet load="1iof" size=" | + | [[Image:1iof.gif|left|200px]]<br /><applet load="1iof" size="350" color="white" frame="true" align="right" spinBox="true" |
caption="1iof, resolution 2.2Å" /> | caption="1iof, resolution 2.2Å" /> | ||
'''X-RAY CRYSTALLINE STRUCTURES OF PYRROLIDONE CARBOXYL PEPTIDASE FROM A HYPERTHERMOPHILE, PYROCOCCUS FURIOSUS, AND ITS CYS-FREE MUTANT'''<br /> | '''X-RAY CRYSTALLINE STRUCTURES OF PYRROLIDONE CARBOXYL PEPTIDASE FROM A HYPERTHERMOPHILE, PYROCOCCUS FURIOSUS, AND ITS CYS-FREE MUTANT'''<br /> | ||
==Overview== | ==Overview== | ||
| - | In order to elucidate the mechanism of the thermostability of proteins | + | In order to elucidate the mechanism of the thermostability of proteins from hyperthermophiles, X-ray crystalline structures of pyrrolidone carboxyl peptidase from a hyperthermophile, Pyrococcus furiosus (PfPCP), and its mutant protein with Ser substituted at Cys142 and Cys188 were determined at 2.2 and 2.7 A resolution, respectively. The obtained structures were compared with those previously reported for pyrrolidone carboxyl peptidases from a hyperthermophilie, Thermococcus litoralis (TlPCP), and from a mesophile, Bacillus amyloliquefaciens (BaPCP). The PfPCP structure is a tetramer of four identical subunits similar to that of the TlPCP and BaPCP. The largest structural changes among the three PCPs were detected in the C-terminal protrusion, which interacts with that of another subunit. A comparison of the three structures indicated that the high stability of PfPCP is caused by increases in hydrophobic interactions and hydrogen bonds, the formation of an intersubunit ion-pair network, and improvement to an ideal conformation. On the basis of the structures of the three proteins, it can be concluded that PfPCP does not have any special factors responsible for its extremely high stability and that the conformational structure of PfPCP is superior in its combination of positive and negative stabilizing factors compared with BaPCP. |
==About this Structure== | ==About this Structure== | ||
| - | 1IOF is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Pyrococcus_furiosus Pyrococcus furiosus]. Active as [http://en.wikipedia.org/wiki/Pyroglutamyl-peptidase_I Pyroglutamyl-peptidase I], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.4.19.3 3.4.19.3] Full crystallographic information is available from [http:// | + | 1IOF is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Pyrococcus_furiosus Pyrococcus furiosus]. Active as [http://en.wikipedia.org/wiki/Pyroglutamyl-peptidase_I Pyroglutamyl-peptidase I], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.4.19.3 3.4.19.3] Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1IOF OCA]. |
==Reference== | ==Reference== | ||
| - | X-ray crystalline structures of pyrrolidone carboxyl peptidase from a hyperthermophile, Pyrococcus furiosus, and its cys-free mutant., Tanaka H, Chinami M, Mizushima T, Ogasahara K, Ota M, Tsukihara T, Yutani K, J Biochem | + | X-ray crystalline structures of pyrrolidone carboxyl peptidase from a hyperthermophile, Pyrococcus furiosus, and its cys-free mutant., Tanaka H, Chinami M, Mizushima T, Ogasahara K, Ota M, Tsukihara T, Yutani K, J Biochem. 2001 Jul;130(1):107-18. PMID:[http://ispc.weizmann.ac.il//pmbin/getpm?pmid=11432786 11432786] |
[[Category: Pyrococcus furiosus]] | [[Category: Pyrococcus furiosus]] | ||
[[Category: Pyroglutamyl-peptidase I]] | [[Category: Pyroglutamyl-peptidase I]] | ||
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[[Category: pyroglutamyl-peptidase i]] | [[Category: pyroglutamyl-peptidase i]] | ||
| - | ''Page seeded by [http:// | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Feb 21 13:13:53 2008'' |
Revision as of 11:13, 21 February 2008
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X-RAY CRYSTALLINE STRUCTURES OF PYRROLIDONE CARBOXYL PEPTIDASE FROM A HYPERTHERMOPHILE, PYROCOCCUS FURIOSUS, AND ITS CYS-FREE MUTANT
Overview
In order to elucidate the mechanism of the thermostability of proteins from hyperthermophiles, X-ray crystalline structures of pyrrolidone carboxyl peptidase from a hyperthermophile, Pyrococcus furiosus (PfPCP), and its mutant protein with Ser substituted at Cys142 and Cys188 were determined at 2.2 and 2.7 A resolution, respectively. The obtained structures were compared with those previously reported for pyrrolidone carboxyl peptidases from a hyperthermophilie, Thermococcus litoralis (TlPCP), and from a mesophile, Bacillus amyloliquefaciens (BaPCP). The PfPCP structure is a tetramer of four identical subunits similar to that of the TlPCP and BaPCP. The largest structural changes among the three PCPs were detected in the C-terminal protrusion, which interacts with that of another subunit. A comparison of the three structures indicated that the high stability of PfPCP is caused by increases in hydrophobic interactions and hydrogen bonds, the formation of an intersubunit ion-pair network, and improvement to an ideal conformation. On the basis of the structures of the three proteins, it can be concluded that PfPCP does not have any special factors responsible for its extremely high stability and that the conformational structure of PfPCP is superior in its combination of positive and negative stabilizing factors compared with BaPCP.
About this Structure
1IOF is a Single protein structure of sequence from Pyrococcus furiosus. Active as Pyroglutamyl-peptidase I, with EC number 3.4.19.3 Full crystallographic information is available from OCA.
Reference
X-ray crystalline structures of pyrrolidone carboxyl peptidase from a hyperthermophile, Pyrococcus furiosus, and its cys-free mutant., Tanaka H, Chinami M, Mizushima T, Ogasahara K, Ota M, Tsukihara T, Yutani K, J Biochem. 2001 Jul;130(1):107-18. PMID:11432786
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