1rki: Difference between revisions

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[[Image:1rki.gif|left|200px]]<br /><applet load="1rki" size="~~450~~" color="white" frame="true" align="right" spinBox="true"

[[Image:1rki.gif|left|200px]]<br /><applet load="1rki" size="350" color="white" frame="true" align="right" spinBox="true"

caption="1rki, resolution 1.60Å" />

'''Structure of pag5_736 from P. aerophilum with three disulphide bonds'''<br />

==Overview==

Thermophilic organisms flourish in varied high-temperature environmental, niches that are deadly to other organisms. Recently, genomic evidence has, implicated a critical role for disulfide bonds in the structural, stabilization of intracellular proteins from certain of these organisms, contrary to the conventional view that structural disulfide bonds are, exclusively extracellular. Here both computational and structural data are, presented to explore the occurrence of disulfide bonds as a, protein-stabilization method across many thermophilic prokaryotes. Based, on computational studies, disulfide-bond richness is found to be, widespread, with thermophiles containing the highest levels., Interestingly, only a distinct subset of thermophiles exhibit this, property. A computational search for proteins matching this target, phylogenetic profile singles out a specific protein, known as protein, disulfide oxidoreductase, as a potential key player in thermophilic, intracellular disulfide-bond formation. Finally, biochemical support in, the form of a new crystal structure of a thermophilic protein with three, disulfide bonds is presented together with a survey of known structures, from the literature. Together, the results provide insight into, biochemical specialization and the diversity of methods employed by, organisms to stabilize their proteins in exotic environments. The findings, also motivate continued efforts to sequence genomes from divergent, organisms.

Thermophilic organisms flourish in varied high-temperature environmental niches that are deadly to other organisms. Recently, genomic evidence has implicated a critical role for disulfide bonds in the structural stabilization of intracellular proteins from certain of these organisms, contrary to the conventional view that structural disulfide bonds are exclusively extracellular. Here both computational and structural data are presented to explore the occurrence of disulfide bonds as a protein-stabilization method across many thermophilic prokaryotes. Based on computational studies, disulfide-bond richness is found to be widespread, with thermophiles containing the highest levels. Interestingly, only a distinct subset of thermophiles exhibit this property. A computational search for proteins matching this target phylogenetic profile singles out a specific protein, known as protein disulfide oxidoreductase, as a potential key player in thermophilic intracellular disulfide-bond formation. Finally, biochemical support in the form of a new crystal structure of a thermophilic protein with three disulfide bonds is presented together with a survey of known structures from the literature. Together, the results provide insight into biochemical specialization and the diversity of methods employed by organisms to stabilize their proteins in exotic environments. The findings also motivate continued efforts to sequence genomes from divergent organisms.

==About this Structure==

1RKI is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Pyrobaculum_aerophilum Pyrobaculum aerophilum] with ACT, SO4, CL, P6G and PG4 as [http://en.wikipedia.org/wiki/ligands ligands]. Full crystallographic information is available from [http://~~ispc~~.weizmann.ac.il/oca-bin/ocashort?id=1RKI OCA].

1RKI is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Pyrobaculum_aerophilum Pyrobaculum aerophilum] with <scene name='pdbligand=ACT:'>ACT</scene>, <scene name='pdbligand=SO4:'>SO4</scene>, <scene name='pdbligand=CL:'>CL</scene>, <scene name='pdbligand=P6G:'>P6G</scene> and <scene name='pdbligand=PG4:'>PG4</scene> as [http://en.wikipedia.org/wiki/ligands ligands]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1RKI OCA].

==Reference==

Line 14:

[[Category: Single protein]]

[[Category: Beeby, M.]]

[[Category: Boutz, D.R.]]

[[Category: Boutz, D R.]]

[[Category: Perry, L.J.]]

[[Category: Perry, L J.]]

[[Category: Ryttersgaard, C.]]

[[Category: Yeates, T.O.]]

[[Category: Yeates, T O.]]

[[Category: ACT]]

[[Category: CL]]

Line 28:

[[Category: structural genomics]]

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@@ Line 1: / Line 1: @@
-[[Image:1rki.gif|left|200px]]<br /><applet load="1rki" size="450" color="white" frame="true" align="right" spinBox="true"
+[[Image:1rki.gif|left|200px]]<br /><applet load="1rki" size="350" color="white" frame="true" align="right" spinBox="true"
 caption="1rki, resolution 1.60&Aring;" />
 '''Structure of pag5_736 from P. aerophilum with three disulphide bonds'''<br />
 ==Overview==
-Thermophilic organisms flourish in varied high-temperature environmental, niches that are deadly to other organisms. Recently, genomic evidence has, implicated a critical role for disulfide bonds in the structural, stabilization of intracellular proteins from certain of these organisms, contrary to the conventional view that structural disulfide bonds are, exclusively extracellular. Here both computational and structural data are, presented to explore the occurrence of disulfide bonds as a, protein-stabilization method across many thermophilic prokaryotes. Based, on computational studies, disulfide-bond richness is found to be, widespread, with thermophiles containing the highest levels., Interestingly, only a distinct subset of thermophiles exhibit this, property. A computational search for proteins matching this target, phylogenetic profile singles out a specific protein, known as protein, disulfide oxidoreductase, as a potential key player in thermophilic, intracellular disulfide-bond formation. Finally, biochemical support in, the form of a new crystal structure of a thermophilic protein with three, disulfide bonds is presented together with a survey of known structures, from the literature. Together, the results provide insight into, biochemical specialization and the diversity of methods employed by, organisms to stabilize their proteins in exotic environments. The findings, also motivate continued efforts to sequence genomes from divergent, organisms.
+Thermophilic organisms flourish in varied high-temperature environmental niches that are deadly to other organisms. Recently, genomic evidence has implicated a critical role for disulfide bonds in the structural stabilization of intracellular proteins from certain of these organisms, contrary to the conventional view that structural disulfide bonds are exclusively extracellular. Here both computational and structural data are presented to explore the occurrence of disulfide bonds as a protein-stabilization method across many thermophilic prokaryotes. Based on computational studies, disulfide-bond richness is found to be widespread, with thermophiles containing the highest levels. Interestingly, only a distinct subset of thermophiles exhibit this property. A computational search for proteins matching this target phylogenetic profile singles out a specific protein, known as protein disulfide oxidoreductase, as a potential key player in thermophilic intracellular disulfide-bond formation. Finally, biochemical support in the form of a new crystal structure of a thermophilic protein with three disulfide bonds is presented together with a survey of known structures from the literature. Together, the results provide insight into biochemical specialization and the diversity of methods employed by organisms to stabilize their proteins in exotic environments. The findings also motivate continued efforts to sequence genomes from divergent organisms.
 ==About this Structure==
-RKI is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Pyrobaculum_aerophilum Pyrobaculum aerophilum] with ACT, SO4, CL, P6G and PG4 as [http://en.wikipedia.org/wiki/ligands ligands]. Full crystallographic information is available from [http://ispc.weizmann.ac.il/oca-bin/ocashort?id=1RKI OCA].
+RKI is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Pyrobaculum_aerophilum Pyrobaculum aerophilum] with <scene name='pdbligand=ACT:'>ACT</scene>, <scene name='pdbligand=SO4:'>SO4</scene>, <scene name='pdbligand=CL:'>CL</scene>, <scene name='pdbligand=P6G:'>P6G</scene> and <scene name='pdbligand=PG4:'>PG4</scene> as [http://en.wikipedia.org/wiki/ligands ligands]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1RKI OCA].
 ==Reference==
@@ Line 14: / Line 14: @@
 [[Category: Single protein]]
 [[Category: Beeby, M.]]
-[[Category: Boutz, D.R.]]
+[[Category: Boutz, D R.]]
-[[Category: Perry, L.J.]]
+[[Category: Perry, L J.]]
 [[Category: Ryttersgaard, C.]]
-[[Category: Yeates, T.O.]]
+[[Category: Yeates, T O.]]
 [[Category: ACT]]
 [[Category: CL]]
@@ Line 28: / Line 28: @@
 [[Category: structural genomics]]
-''Page seeded by [http://ispc.weizmann.ac.il/oca OCA ] on Sat Nov 24 22:50:17 2007''
+''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Feb 21 14:51:53 2008''