Studies of the Electronic and Dynamic Properties of High-Potential Iron Proteins by Substitution with Non-Natural Amino Acids. 3-Fluorotyrosine-Modified Chromatium vinosum High-Potential Iron Protein

1994 ◽  
Vol 116 (10) ◽  
pp. 4483-4484 ◽  
Author(s):  
Siu Man Lui ◽  
J. A. Cowan
Keyword(s):  
Amino Acids ◽  
Dynamic Properties ◽  
High Potential ◽  
Chromatium Vinosum ◽  
Iron Protein ◽  
Iron Proteins ◽  
Natural Amino Acids

Synthesis, Cloning and Expression of a Synthetic Gene for High Potential Iron Protein from Chromatium vinosum

1993 ◽  
Vol 197 (3) ◽  
pp. 1357-1362 ◽  
Author(s):  
A. Agarwal ◽  
J. Tan ◽  
M. Eren ◽  
A. Tevelev ◽  
S.M. Lui ◽  
...  
Keyword(s):  
High Potential ◽  
Chromatium Vinosum ◽  
Cloning And Expression ◽  
Synthetic Gene ◽  
Iron Protein

Ab initio solution and refinement of two high-potential iron protein structures at atomic resolution

1999 ◽  
Vol 55 (11) ◽  
pp. 1773-1784 ◽  
Author(s):  
Emilio Parisini ◽  
Francesco Capozzi ◽  
Paolo Lubini ◽  
Victor Lamzin ◽  
Claudio Luchinat ◽  
...  
Keyword(s):  
Ab Initio ◽  
Protein Structures ◽  
Direct Methods ◽  
High Potential ◽  
Chromatium Vinosum ◽  
Atomic Resolution ◽  
Crystal Modification ◽  
Redox Potentials ◽  
Asymmetric Unit ◽  
Iron Protein

The crystal structure of the reduced high-potential iron protein (HiPIP) from Chromatium vinosum has been redetermined in a new orthorhombic crystal modification, and the structure of its H42Q mutant has been determined in orthorhombic (H42Q-1) and cubic (H42Q-2) modifications. The first two were solved by ab initio direct methods using data collected to atomic resolution (1.20 and 0.93 Å, respectively). The recombinant wild type (rc-WT) with two HiPIP molecules in the asymmetric unit has 1264 protein atoms and 335 solvent sites, and is the second largest structure reported so far that has been solved by pure direct methods. The solutions were obtained in a fully automated way and included more than 80% of the protein atoms. Restrained anisotropic refinement for rc-WT and H42Q-1 converged to R_1=\sum\big||F_o|-|F_c|\big|\big/\sum|F_o| of 12.0 and 13.6%, respectively [data with I>2\sigma(I)], and 12.8 and 15.5% (all data). H42Q-2 contains two molecules in the asymmetric unit and diffracted only to 2.6 Å. In both molecules of rc-WT and in the single unique molecule of H42Q-1 the [Fe4S4]2+ cluster dimensions are very similar and show a characteristic tetragonal distortion with four short Fe—S bonds along four approximately parallel cube edges, and eight long Fe—S bonds. The unique protein molecules in H42Q-2 and rc-WT are also very similar in other respects, except for the hydrogen bonding around the mutated residue that is at the surface of the protein, supporting the hypothesis that the difference in redox potentials at lower pH values is caused primarily by differences in the charge distribution near the surface of the protein rather than by structural differences in the cluster region.

1H NMR studies on reduced high potential iron protein (HIPIP) from Chromatium Vinosum

1993 ◽  
Vol 4 (4) ◽  
pp. 477-489 ◽  
Author(s):  
H. Rüterjans ◽  
L. Messori ◽  
O. Ohlenschläger ◽  
F. Briganti ◽  
I. Bertini
Keyword(s):  
1H Nmr ◽  
High Potential ◽  
Chromatium Vinosum ◽  
Nmr Studies ◽  
Iron Protein
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