1gtm
From Proteopedia
(New page: 200px<br /><applet load="1gtm" size="450" color="white" frame="true" align="right" spinBox="true" caption="1gtm, resolution 2.2Å" /> '''STRUCTURE OF GLUTAMAT...) |
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| - | [[Image:1gtm.gif|left|200px]]<br /><applet load="1gtm" size=" | + | [[Image:1gtm.gif|left|200px]]<br /><applet load="1gtm" size="350" color="white" frame="true" align="right" spinBox="true" |
caption="1gtm, resolution 2.2Å" /> | caption="1gtm, resolution 2.2Å" /> | ||
'''STRUCTURE OF GLUTAMATE DEHYDROGENASE'''<br /> | '''STRUCTURE OF GLUTAMATE DEHYDROGENASE'''<br /> | ||
==Overview== | ==Overview== | ||
| - | BACKGROUND: The hyperthermophile Pyrococcus furiosus is one of the most | + | BACKGROUND: The hyperthermophile Pyrococcus furiosus is one of the most thermostable organisms known, with an optimum growth temperature of 100 degrees C. The proteins from this organism display extreme thermostability. We have undertaken the structure determination of glutamate dehydrogenase from P. furiosus in order to gain further insights into the relationship between molecular structure and thermal stability. RESULTS: The structure of P. furiosus glutamate dehydrogenase, a homohexameric enzyme, has been determined at 2.2 A resolution and compared with the structure of glutamate dehydrogenase from the mesophile Clostridium symbiosum. CONCLUSIONS: Comparison of the structures of these two enzymes has revealed one major difference: the structure of the hyperthermophilic enzyme contains a striking series of ion-pair networks on the surface of the protein subunits and buried at both interdomain and intersubunit interfaces. We propose that the formation of such extended networks may represent a major stabilizing feature associated with the adaptation of enzymes to extreme temperatures. |
==About this Structure== | ==About this Structure== | ||
| - | 1GTM is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Pyrococcus_furiosus Pyrococcus furiosus] with SO4 as [http://en.wikipedia.org/wiki/ligand ligand]. Active as [http://en.wikipedia.org/wiki/Glutamate_dehydrogenase_(NAD(P)(+)) Glutamate dehydrogenase (NAD(P)(+))], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=1.4.1.3 1.4.1.3] Full crystallographic information is available from [http:// | + | 1GTM is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Pyrococcus_furiosus Pyrococcus furiosus] with <scene name='pdbligand=SO4:'>SO4</scene> as [http://en.wikipedia.org/wiki/ligand ligand]. Active as [http://en.wikipedia.org/wiki/Glutamate_dehydrogenase_(NAD(P)(+)) Glutamate dehydrogenase (NAD(P)(+))], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=1.4.1.3 1.4.1.3] Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1GTM OCA]. |
==Reference== | ==Reference== | ||
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[[Category: Pyrococcus furiosus]] | [[Category: Pyrococcus furiosus]] | ||
[[Category: Single protein]] | [[Category: Single protein]] | ||
| - | [[Category: Britton, K | + | [[Category: Britton, K L.]] |
[[Category: Pasquo, A.]] | [[Category: Pasquo, A.]] | ||
| - | [[Category: Rice, D | + | [[Category: Rice, D W.]] |
| - | [[Category: Stillman, T | + | [[Category: Stillman, T J.]] |
| - | [[Category: Yip, K | + | [[Category: Yip, K S.P.]] |
[[Category: SO4]] | [[Category: SO4]] | ||
[[Category: nad]] | [[Category: nad]] | ||
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[[Category: oxidoreductase]] | [[Category: oxidoreductase]] | ||
| - | ''Page seeded by [http:// | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Feb 21 12:53:51 2008'' |
Revision as of 10:53, 21 February 2008
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STRUCTURE OF GLUTAMATE DEHYDROGENASE
Overview
BACKGROUND: The hyperthermophile Pyrococcus furiosus is one of the most thermostable organisms known, with an optimum growth temperature of 100 degrees C. The proteins from this organism display extreme thermostability. We have undertaken the structure determination of glutamate dehydrogenase from P. furiosus in order to gain further insights into the relationship between molecular structure and thermal stability. RESULTS: The structure of P. furiosus glutamate dehydrogenase, a homohexameric enzyme, has been determined at 2.2 A resolution and compared with the structure of glutamate dehydrogenase from the mesophile Clostridium symbiosum. CONCLUSIONS: Comparison of the structures of these two enzymes has revealed one major difference: the structure of the hyperthermophilic enzyme contains a striking series of ion-pair networks on the surface of the protein subunits and buried at both interdomain and intersubunit interfaces. We propose that the formation of such extended networks may represent a major stabilizing feature associated with the adaptation of enzymes to extreme temperatures.
About this Structure
1GTM is a Single protein structure of sequence from Pyrococcus furiosus with as ligand. Active as Glutamate dehydrogenase (NAD(P)(+)), with EC number 1.4.1.3 Full crystallographic information is available from OCA.
Reference
The structure of Pyrococcus furiosus glutamate dehydrogenase reveals a key role for ion-pair networks in maintaining enzyme stability at extreme temperatures., Yip KS, Stillman TJ, Britton KL, Artymiuk PJ, Baker PJ, Sedelnikova SE, Engel PC, Pasquo A, Chiaraluce R, Consalvi V, Structure. 1995 Nov 15;3(11):1147-58. PMID:8591026
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