Spectroscopic Studies and Electronic Structure Description of the High Potential Type 1 Copper Site in Fungal Laccase:  Insight into the Effect of the Axial Ligand

1999 ◽  
Vol 121 (30) ◽  
pp. 7138-7149 ◽  
Author(s):  
Amy E. Palmer ◽  
David W. Randall ◽  
Feng Xu ◽  
Edward I. Solomon
Keyword(s):  
Electronic Structure ◽  
Spectroscopic Studies ◽  
Axial Ligand ◽  
High Potential ◽  
Fungal Laccase ◽  
Copper Site ◽  
Structure Description ◽  
Type 1 Copper ◽  
Insight Into

scholarly journals Defining the Role of the Axial Ligand of the Type 1 Copper Site in Amicyanin by Replacement of Methionine with Leucine

Biochemistry ◽  
2009 ◽  
Vol 48 (39) ◽  
pp. 9174-9184 ◽  
Author(s):  
Moonsung Choi ◽  
Narayanasami Sukumar ◽  
Aimin Liu ◽  
Victor L. Davidson
Keyword(s):  
Axial Ligand ◽  
Copper Site ◽  
Type 1 Copper

An Axial Met Ligand at a Type 1 Copper Site is Preferable for Fast Electron Transfer

ChemBioChem ◽  
2004 ◽  
Vol 5 (11) ◽  
pp. 1579-1581 ◽  
Author(s):  
Mark D. Harrison ◽  
Christopher Dennison
Keyword(s):  
Electron Transfer ◽  
Fast Electron ◽  
Copper Site ◽  
Type 1 Copper

Effect of the Methionine Ligand on the Reorganization Energy of the Type-1 Copper Site of Nitrite Reductase

2007 ◽  
Vol 129 (3) ◽  
pp. 519-525 ◽  
Author(s):  
Hein J. Wijma ◽  
Iain MacPherson ◽  
Ole Farver ◽  
Elitza I. Tocheva ◽  
Israel Pecht ◽  
...  
Keyword(s):  
Nitrite Reductase ◽  
Reorganization Energy ◽  
Copper Site ◽  
Type 1 Copper

Spectroscopic and Magnetic Studies of Human Ceruloplasmin:  Identification of a Redox-Inactive Reduced Type 1 Copper Site†

Biochemistry ◽  
1998 ◽  
Vol 37 (26) ◽  
pp. 9570-9578 ◽  
Author(s):  
Timothy E. Machonkin ◽  
Hua H. Zhang ◽  
Britt Hedman ◽  
Keith O. Hodgson ◽  
Edward I. Solomon
Keyword(s):  
Magnetic Studies ◽  
Copper Site ◽  
Type 1 Copper ◽  
Human Ceruloplasmin

scholarly journals An e.p.r. study of the non-equivalence of the copper sites of caeruloplasmin

1986 ◽  
Vol 238 (1) ◽  
pp. 291-295 ◽  
Author(s):  
L Calabrese ◽  
M Carbonaro
Keyword(s):  
Slow Phase ◽  
Copper Binding ◽  
Blue Copper ◽  
Sequence Of Events ◽  
Copper Site ◽  
Hyperfine Splitting Constant ◽  
Type 1 Copper ◽  
Splitting Constant

The two Type 1 (blue) copper-binding sites of caeruloplasmin were spectroscopically differentiated by the kinetic analysis of the e.p.r. spectra during the redox cycle. One blue copper, with a hyperfine splitting constant (A parallel) of 6.8 mT, which was rapidly reduced, was not reoxidized by oxygen, whereas it was reoxidized by H2O2. The other blue copper (A parallel = 5.8 mT), which was reduced slowly, was rapidly reoxidized by either oxygen or H2O2. A conformational change of the Type 2 copper was concomitant with the fast reduction of Type 1 copper, whereas its reduction occurred during the slow phase. This sequence of events was reversed in the reoxidation step, that is, the Type 2 copper reappeared rapidly as the species with altered conformation and reverted to the symmetry typical of the native state in the slow phase. The specific reaction of a blue-copper site with the H2O2 can tentatively be related to the established ability of caeruloplasmin to prevent ‘oxidative’ attack of proteins and lipids.

DFT insight into axial ligand effects on electronic structure and mechanistic reactivity of oxoiron(iv) porphyrin

2020 ◽  
Vol 22 (21) ◽  
pp. 12173-12179
Author(s):  
Zhifeng Ma ◽  
Naoki Nakatani ◽  
Hiroshi Fujii ◽  
Masahiko Hada
Keyword(s):  
Density Functional Theory ◽  
Electronic Structure ◽  
Density Functional ◽  
Density Functional Theory Calculations ◽  
Axial Ligand ◽  
Functional Theory ◽  
Ligand Effects ◽  
Insight Into

The nature of axial ligand effects is revealed by density functional theory calculations, the ability of axial ligand bound to iron is strong, and the reaction is more reactive.

Sign in / Sign up

Export Citation Format

Share Document