1990
DOI: 10.1021/ja00162a025
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Reactivity of the laccase trinuclear copper active site with dioxygen: an x-ray absorption edge study

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Cited by 84 publications
(81 citation statements)
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“…Since contributions from each copper site overlap, the average copper-copper distance in the trinuclear copper center can be obtained. The EXAFS spectra of the type II copper-depleted laccase [73] and ascorbate oxidase [74] show that their type III coppers are in the cuprous state even under air and are therefore different from the coupled copper centers in hemocyanin and tyrosinase. The EXAFS spectrum of Cu A in N 2 OR was very similar to that of COX and a copper-copper distance of ca.…”
Section: X-ray Absorption Spectramentioning
confidence: 99%
“…Since contributions from each copper site overlap, the average copper-copper distance in the trinuclear copper center can be obtained. The EXAFS spectra of the type II copper-depleted laccase [73] and ascorbate oxidase [74] show that their type III coppers are in the cuprous state even under air and are therefore different from the coupled copper centers in hemocyanin and tyrosinase. The EXAFS spectrum of Cu A in N 2 OR was very similar to that of COX and a copper-copper distance of ca.…”
Section: X-ray Absorption Spectramentioning
confidence: 99%
“…Spektroskopijom kombinovanom sa kristalografijom dobijen je detaljni opis aktivnog mjesta lakaze. Magnetni cirkularni dihroizam (MCD) i apsorpciona spektroskopija X-zraka lakaze su pokazale da se Tip 2 i 3 centri kombinuju da bi funkcionisali kao trinuklearni bakarni klaster koji interaguje sa egzogenim ligandom ukljuĉujući reakciju sa dikiseonikom 1 (Cole et al, 1990). Tip 2 centar je 3-koordinovan sa dva histidinska liganda i vodom.…”
Section: Aktivno Mjesto Lakazeunclassified
“…Tip 3 bakar je 4 puta koordinovan i to sa tri histidina i premošćujućim hidoksidom (slika 1). Strukturni model premošćavanja izmeĊu Tipa 2 i 3 (slika 3A i 3B) (Cole et al, 1990;Palmer et al, 1999;Sundaran et al, 1997) je dao uvid u katalitiĉko redukovanje kiseonika do vode. Zakljuĉeno je da je bakar Tipa 2 neophodan za redukciju kiseonika, jer je premošćavanje do ovog centra ukljuĉeno u stabilizaciju peroksidnog intermedijera.…”
Section: Aktivno Mjesto Lakazeunclassified
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