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Titolo:
SYNTHESIS AND PHYSICAL CHARACTERIZATION OF NOVEL HEME-BASED MODEL SYSTEMS FOR PHOTOINITIATED ELECTRON-TRANSFER .1. COMPLEXATION OF A RUPROHIS BIFUNCTIONAL PEPTIDE AND MICROPEROXIDASE-11
Autore:
FAN B; FONTENOT DL; LARSEN RW; SIMPSON MC; SHELNUTT JA; FALCON R; MARTINEZ L; NIU S; ZHANG S; NIEMCZYK T; ONDRIAS MR;
Indirizzi:
UNIV NEW MEXICO,DEPT CHEM ALBUQUERQUE NM 87131 UNIV NEW MEXICO,DEPT CHEM ALBUQUERQUE NM 87131 LOS ALAMOS NATL LAB,DIV LIFE SCI LOS ALAMOS NM 87545 UNIV HAWAII,DEPT CHEM HONOLULU HI 96822 SANDIA NATL LABS,FUEL SCI DIV ALBUQUERQUE NM 87185
Titolo Testata:
Inorganic chemistry
fascicolo: 18, volume: 36, anno: 1997,
pagine: 3839 - 3846
SICI:
0020-1669(1997)36:18<3839:SAPCON>2.0.ZU;2-D
Fonte:
ISI
Lingua:
ENG
Soggetto:
CYTOCHROME-C; PHOTOCHEMISTRY; DEPENDENCE; TRIS(2,2'-BIPYRIDINE)RUTHENIUM(II); PHOTOPHYSICS; PORPHYRINS; TRANSIENT; OXIDASE; ENERGY;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
34
Recensione:
Indirizzi per estratti:
Citazione:
B. Fan et al., "SYNTHESIS AND PHYSICAL CHARACTERIZATION OF NOVEL HEME-BASED MODEL SYSTEMS FOR PHOTOINITIATED ELECTRON-TRANSFER .1. COMPLEXATION OF A RUPROHIS BIFUNCTIONAL PEPTIDE AND MICROPEROXIDASE-11", Inorganic chemistry, 36(18), 1997, pp. 3839-3846

Abstract

This paper describes the synthesis and initial physical characterization of a new type of model system for the investigation of photoinitiated electron transfer (ET) in proteins and polypeptides. This system is based upon a derivative of a heme-containing digestion product of cytochrome c, microperoxidase-11 (MP-11). The vacant axial position of the five-coordinate heme of MP-11 is coordinated to the terminal histidine of a dipeptide having a photoactive ruthenium tris(bipyridine) moiety at its other end (RuProHis). Photoexcitation of the ruthenium group results in rapid (k(ET) > 10(7) s(-1)), reversible ET to the ferric heme. The equilibrium properties of MP-11 and the MP-11/Ru(peptide) complex were characterized with optical absorption, luminescence, and resonance Raman (RR) spectroscopies. Molecular modeling was also employed to examine the structure and energetics of the equilibrium species. Clear evidence for reversible photoinduced ET was observed in time-resolved luminescence and transient resonance Raman studies of the MP-11/RuProHis samples.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 24/09/20 alle ore 07:13:09