1bd6
From Proteopedia
(New page: 200px<br /><applet load="1bd6" size="450" color="white" frame="true" align="right" spinBox="true" caption="1bd6" /> '''7-FE FERREDOXIN FROM BACILLUS SCHLEGELII, NM...) |
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| - | [[Image:1bd6.gif|left|200px]]<br /><applet load="1bd6" size=" | + | [[Image:1bd6.gif|left|200px]]<br /><applet load="1bd6" size="350" color="white" frame="true" align="right" spinBox="true" |
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'''7-FE FERREDOXIN FROM BACILLUS SCHLEGELII, NMR, MINIMIZED AVERAGE STRUCTURE'''<br /> | '''7-FE FERREDOXIN FROM BACILLUS SCHLEGELII, NMR, MINIMIZED AVERAGE STRUCTURE'''<br /> | ||
==Overview== | ==Overview== | ||
| - | The solution structure of the paramagnetic seven-iron ferredoxin from | + | The solution structure of the paramagnetic seven-iron ferredoxin from Bacillus schlegelii in its oxidized form has been determined by 1H NMR. The protein, which contains 77 amino acids, is thermostable. Seventy-two residues and 79% of all theoretically expected proton resonances have been assigned. The structure has been determined through torsion angle dynamics calculations with the program DYANA, using 966 meaningful NOEs (from a total of 1305), hydrogen bond constraints, and NMR derived dihedral angle constraints for the cluster ligating cysteines, and by using crystallographic information to build up the two clusters. Afterwards, restrained energy minimization and restrained molecular dynamics were applied to each conformer of the family. The final family of 20 structures has RMSD values from the mean structure of 0.68 A for the backbone atoms and of 1.16 A for all heavy atoms. The contributions to the thermal stability of the B. schlegelii ferredoxin are discussed by comparing the present structure to that of the less stable Azotobacter vinelandii ferredoxin I which is the only other available structure of a bacterial seven-iron ferredoxin. It is proposed that the hydrophobic interactions and the hydrogen bond network linking the N-terminus and the C-terminus together and a high number of salt bridges contribute to the stability. |
==About this Structure== | ==About this Structure== | ||
| - | 1BD6 is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Bacillus_schlegelii Bacillus schlegelii] with F3S and SF4 as [http://en.wikipedia.org/wiki/ligands ligands]. Full crystallographic information is available from [http:// | + | 1BD6 is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Bacillus_schlegelii Bacillus schlegelii] with <scene name='pdbligand=F3S:'>F3S</scene> and <scene name='pdbligand=SF4:'>SF4</scene> as [http://en.wikipedia.org/wiki/ligands ligands]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1BD6 OCA]. |
==Reference== | ==Reference== | ||
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[[Category: iron-sulfur]] | [[Category: iron-sulfur]] | ||
| - | ''Page seeded by [http:// | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Feb 21 11:54:01 2008'' |
Revision as of 09:54, 21 February 2008
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7-FE FERREDOXIN FROM BACILLUS SCHLEGELII, NMR, MINIMIZED AVERAGE STRUCTURE
Overview
The solution structure of the paramagnetic seven-iron ferredoxin from Bacillus schlegelii in its oxidized form has been determined by 1H NMR. The protein, which contains 77 amino acids, is thermostable. Seventy-two residues and 79% of all theoretically expected proton resonances have been assigned. The structure has been determined through torsion angle dynamics calculations with the program DYANA, using 966 meaningful NOEs (from a total of 1305), hydrogen bond constraints, and NMR derived dihedral angle constraints for the cluster ligating cysteines, and by using crystallographic information to build up the two clusters. Afterwards, restrained energy minimization and restrained molecular dynamics were applied to each conformer of the family. The final family of 20 structures has RMSD values from the mean structure of 0.68 A for the backbone atoms and of 1.16 A for all heavy atoms. The contributions to the thermal stability of the B. schlegelii ferredoxin are discussed by comparing the present structure to that of the less stable Azotobacter vinelandii ferredoxin I which is the only other available structure of a bacterial seven-iron ferredoxin. It is proposed that the hydrophobic interactions and the hydrogen bond network linking the N-terminus and the C-terminus together and a high number of salt bridges contribute to the stability.
About this Structure
1BD6 is a Single protein structure of sequence from Bacillus schlegelii with and as ligands. Full crystallographic information is available from OCA.
Reference
Solution structure of the oxidized Fe7S8 ferredoxin from the thermophilic bacterium Bacillus schlegelii by 1H NMR spectroscopy., Aono S, Bentrop D, Bertini I, Donaire A, Luchinat C, Niikura Y, Rosato A, Biochemistry. 1998 Jul 7;37(27):9812-26. PMID:9657695
Page seeded by OCA on Thu Feb 21 11:54:01 2008
Categories: Bacillus schlegelii | Single protein | Aono, S. | Bentrop, D. | Bertini, I. | Donaire, A. | Luchinat, C. | Niikura, Y. | Rosato, A. | F3S | SF4 | Electron transport | Iron-sulfur
