1gde: Difference between revisions

New page: left|200px<br /><applet load="1gde" size="450" color="white" frame="true" align="right" spinBox="true" caption="1gde, resolution 1.8Å" /> '''CRYSTAL STRUCTURE OF ...
 
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caption="1gde, resolution 1.8&Aring;" />
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'''CRYSTAL STRUCTURE OF PYROCOCCUS PROTEIN A-1 E-FORM'''<br />
'''CRYSTAL STRUCTURE OF PYROCOCCUS PROTEIN A-1 E-FORM'''<br />


==Overview==
==Overview==
We determined the crystal structure of the liganded form of, alpha-aminotransferase from a hyperthermophile, Pyrococcus horikoshii., This hyperthermophilic enzyme did not show domain movement upon binding of, an acidic substrate, glutamate, except for a small movement of the, alpha-helix from Glu16 to Ala25. The omega-carboxyl group of the acidic, substrate was recognized by Tyr70* without its side-chain movement, but, not by positively charged Arg or Lys. Compared with the homologous enzymes, from Thermus thermophilus HB8 and Escherichia coli, it was suggested that, the more thermophilic the enzyme is, the smaller the domain movement is., This rule seems to be applicable to many other enzymes already reported.
We determined the crystal structure of the liganded form of alpha-aminotransferase from a hyperthermophile, Pyrococcus horikoshii. This hyperthermophilic enzyme did not show domain movement upon binding of an acidic substrate, glutamate, except for a small movement of the alpha-helix from Glu16 to Ala25. The omega-carboxyl group of the acidic substrate was recognized by Tyr70* without its side-chain movement, but not by positively charged Arg or Lys. Compared with the homologous enzymes from Thermus thermophilus HB8 and Escherichia coli, it was suggested that the more thermophilic the enzyme is, the smaller the domain movement is. This rule seems to be applicable to many other enzymes already reported.


==About this Structure==
==About this Structure==
1GDE is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Pyrococcus_horikoshii Pyrococcus horikoshii] with GLU and PLP as [http://en.wikipedia.org/wiki/ligands ligands]. Full crystallographic information is available from [http://ispc.weizmann.ac.il/oca-bin/ocashort?id=1GDE OCA].  
1GDE is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Pyrococcus_horikoshii Pyrococcus horikoshii] with <scene name='pdbligand=GLU:'>GLU</scene> and <scene name='pdbligand=PLP:'>PLP</scene> as [http://en.wikipedia.org/wiki/ligands ligands]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1GDE OCA].  


==Reference==
==Reference==
Temperature dependence of the enzyme-substrate recognition mechanism., Ura H, Harata K, Matsui I, Kuramitsu S, J Biochem (Tokyo). 2001 Jan;129(1):173-8. PMID:[http://ispc.weizmann.ac.il//pmbin/getpm?pmid=11134972 11134972]
Temperature dependence of the enzyme-substrate recognition mechanism., Ura H, Harata K, Matsui I, Kuramitsu S, J Biochem. 2001 Jan;129(1):173-8. PMID:[http://ispc.weizmann.ac.il//pmbin/getpm?pmid=11134972 11134972]
[[Category: Pyrococcus horikoshii]]
[[Category: Pyrococcus horikoshii]]
[[Category: Single protein]]
[[Category: Single protein]]
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[[Category: temperature dependence of substrate recognition]]
[[Category: temperature dependence of substrate recognition]]


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