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4fxc
From Proteopedia
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[[Image:4fxc.jpg|left|200px]] | [[Image:4fxc.jpg|left|200px]] | ||
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'''TERTIARY STRUCTURE OF [2FE-2S] FERREDOXIN FROM SPIRULINA PLATENSIS REFINED AT 2.5 ANGSTROMS RESOLUTION: STRUCTURAL COMPARISONS OF PLANT-TYPE FERREDOXINS AND AN ELECTROSTATIC POTENTIAL ANALYSIS''' | '''TERTIARY STRUCTURE OF [2FE-2S] FERREDOXIN FROM SPIRULINA PLATENSIS REFINED AT 2.5 ANGSTROMS RESOLUTION: STRUCTURAL COMPARISONS OF PLANT-TYPE FERREDOXINS AND AN ELECTROSTATIC POTENTIAL ANALYSIS''' | ||
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==About this Structure== | ==About this Structure== | ||
| - | 4FXC is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Arthrospira_platensis Arthrospira platensis]. This structure supersedes the now removed PDB entries | + | 4FXC is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Arthrospira_platensis Arthrospira platensis]. This structure supersedes the now removed PDB entries and [http://oca.weizmann.ac.il/oca-bin/send-pdb?obs=1&id=1fxc 1fxc]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4FXC OCA]. |
==Reference== | ==Reference== | ||
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[[Category: Fukuyama, K.]] | [[Category: Fukuyama, K.]] | ||
[[Category: Tsukihara, T.]] | [[Category: Tsukihara, T.]] | ||
| - | [[Category: | + | [[Category: Electron transport]] |
| - | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sun May 4 22:24:15 2008'' | |
| - | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on | + | |
Revision as of 19:24, 4 May 2008
TERTIARY STRUCTURE OF [2FE-2S] FERREDOXIN FROM SPIRULINA PLATENSIS REFINED AT 2.5 ANGSTROMS RESOLUTION: STRUCTURAL COMPARISONS OF PLANT-TYPE FERREDOXINS AND AN ELECTROSTATIC POTENTIAL ANALYSIS
Overview
The structure of plant-type [2Fe-2S] ferredoxin isolated from Spirulina platensis has been refined using diffraction data to 2.5 A resolution by alternate cycles of simulated annealing and manual revision of the model. The final R factor is 19.9% for 2,912 reflections with F > 2 sigma F between 8.0 and 2.5 A resolution. S. platensis ferredoxin, like other plant-type [2Fe-2S] ferredoxins, has a major alpha-helix flanking a sheet consisting of four beta strands. The present refinement revises the conformation of residues 56-71, in which a one-turn helix was identified. Superposition of the Spirulina ferredoxin structure on the structures of other ferredoxins that have been well refined showed structural perturbation at a few residues on the amino and carboxyl termini and the turn between the first and second beta-strands. The root-mean-square deviations of the corresponding C alpha atoms of the pairs of ferredoxins range from 0.90 to 1.17 A for all the residues, but from 0.64 to 0.70 A if the few perturbed residues are excluded. Therefore, it may be concluded that the main-chain foldings of all the plant-type [2Fe-2S] ferredoxins are essentially the same. Electrostatic potential analysis showed that the molecular surface around the cluster is negatively charged, whereas that of the beta-sheet of the other side is positively charged. The interaction between ferredoxin and ferredoxin-NADP+ reductase is discussed on the basis of the charge distributions of these molecules and biochemical data.
About this Structure
4FXC is a Single protein structure of sequence from Arthrospira platensis. This structure supersedes the now removed PDB entries and 1fxc. Full crystallographic information is available from OCA.
Reference
Tertiary structure of [2Fe-2S] ferredoxin from Spirulina platensis refined at 2.5 A resolution: structural comparisons of plant-type ferredoxins and an electrostatic potential analysis., Fukuyama K, Ueki N, Nakamura H, Tsukihara T, Matsubara H, J Biochem. 1995 May;117(5):1017-23. PMID:8586613 Page seeded by OCA on Sun May 4 22:24:15 2008
