Title of article :
The dynamic role of distal side residues in heme hydroperoxidase catalysis. Interplay between X-ray crystallography and ab initio MD simulations
Author/Authors :
Giovanni Vidossich، نويسنده , , Pietro and Alfonso-Prieto، نويسنده , , Mercedes and Carpena، نويسنده , , Xavi and Fita، نويسنده , , Ignacio and Loewen، نويسنده , , Peter C. and Rovira، نويسنده , , Carme، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2010
Pages :
8
From page :
37
To page :
44
Abstract :
The enzymatic cycle of hydroperoxidases involves the resting Fe(III) state of the enzyme and the high-valent iron intermediates Compound I and Compound II. These states might be characterized by X-ray crystallography and the transition pathways between each state can be investigated using atomistic simulations. Here we review our recent work in the modeling of two key steps of the enzymatic reaction of hydroperoxidases: the formation of Cpd I in peroxidase and the reduction of Cpd I in catalase. It will be shown that small conformational motions of distal side residues (His in peroxidases and His/Asn in catalases), not,or only partially, revealed by the available X-ray structures, play an important role in the catalytic processes examined.
Keywords :
ab initio molecular dynamics , Density functional theory , Hydroperoxidases , Catalases , enzyme catalysis , Peroxidases
Journal title :
Archives of Biochemistry and Biophysics
Serial Year :
2010
Journal title :
Archives of Biochemistry and Biophysics
Record number :
1631230
Link To Document :
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