title: Organic and inorganic substrates as probes for comparing native bovine lactoperoxidase and recombinant human myeloperoxidase.
abstract: The interaction of native bovine lactoperoxidase (nbLPO) with four substrates has been studied and compared with that of recombinant human myeloperoxidase (rhMPO). Kinetic, spectroscopic and binding parameters extrapolated for each enzyme-substrate adduct have been interpreted in the light of the structural data available for myeloperoxidase (X-ray structure) and lactoperoxidase (3D-model), respectively. The differences in the reactivity and affinity of nbLPO and rhMPO towards SCN(-), catechol, dopamine and 3,4-dihydroxyphenylpropionic acid are here discussed and related to a different structure of the organic substrate access channel as well as to a different accessibility of the heme pocket in the two enzymes.
authors.affiliation: Dipartimento di Chimica IFM, Università di Torino, Via P. Giuria 7, I-10125, Torino, Italy. elena.ghibaudi@unito.it
authors.forename: Elena
authors.initials: E
authors.lastname: Ghibaudi
authors.forename: Enzo
authors.initials: E
authors.lastname: Laurenti
authors.forename: Cristina
authors.initials: C
authors.lastname: Pacchiardo
authors.forename: Gianpaolo
authors.initials: G
authors.lastname: Suriano
authors.forename: Nicole
authors.initials: N
authors.lastname: Moguilevsky
authors.forename: Rosa
authors.initials: R
authors.lastname: Pia Ferrari
mesh_terms: D000818:Animals; D002417:Cattle; D004578:Electron Spin Resonance Spectroscopy; D006863:Hydrogen-Ion Concentration; D007700:Kinetics; D007784:Lactoperoxidase / Q000737:chemistry / Q000378:metabolism*; D015335:Molecular Probes; D009195:Peroxidase / Q000737:chemistry / Q000378:metabolism*; D011994:Recombinant Proteins / Q000737:chemistry / Q000378:metabolism; D013379:Substrate Specificity
chemical_list: D015335:Molecular Probes; D011994:Recombinant Proteins; D007784:Lactoperoxidase; D009195:Peroxidase