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Relaxation Dynamics of Pseudomonas aeruginosa ReI(CO)3(.alpha.-diimine)(HisX)+ (X = 83, 107, 109, 124, 126)CuII Azurins

SYSNO ASEP	0333179
Document Type	J - Journal Article
R&D Document Type	Journal Article
Subsidiary J	Článek ve WOS
Title	Relaxation Dynamics of Pseudomonas aeruginosa ReI(CO)3(.alpha.-diimine)(HisX)+ (X = 83, 107, 109, 124, 126)CuII Azurins
Title	Relaxační dynamika Pseudomonas aeruginosa ReI(CO)3(.alpha.-diimine)(HisX)+ (X = 83, 107, 109, 124, 126)CuII azurinů
Author(s)	Blanco-Rodríguez, A. M. (GB) Busby, M. (GB) Ronayne, K. L. (GB) Towrie, M. (GB) Grädinaru, C. (US) Sudhamsu, J. (US) Sýkora, Jan (UFCH-W)_RID Hof, Martin (UFCH-W)_{RID, ORCID} Záliš, Stanislav (UFCH-W)_{RID, ORCID} Di Billio, A. J. (US) Crane, B. R. (US) Gray, H. B. (US) Vlček, Antonín (UFCH-W)_{RID, ORCID}
Source Title	Journal of the American Chemical Society. - : American Chemical Society - ISSN 0002-7863 Roč. 131, č. 33 (2009), s. 11788-11800
Number of pages	13 s.
Language	eng - English
Country	US - United States
Keywords	resolved infrared spectroscopy ; excited-state dynamics ; electron transfer
Subject RIV	CF - Physical ; Theoretical Chemistry
R&D Projects	OC09043 GA MŠMT - Ministry of Education, Youth and Sports (MEYS)
	LC06063 GA MŠMT - Ministry of Education, Youth and Sports (MEYS)
CEZ	AV0Z40400503 - UFCH-W (2005-2011)
UT WOS	000269379400039
DOI	10.1021/ja902744s
Annotation	Photoinduced relaxation processes of five structurally characterized Pseudomonas aeruginosa Re-I(CO)(3)(alpha-diimine)(HisX) (X = 83, 107, 109, 124, 126)Cu-II azurins have been investigated by time-resolved (ps-ns) IR spectroscopy and emission spectroscopy. Crystal structures reveal the presence of Re-azurin dimers and trimers; that in two cases (X = 107, 124) involve van der Waals interactions between interdigitated diimine aromatic rings. Time-dependent emission anisotropy measurements confirm that the proteins aggregate in mM solutions (D2O, KPi buffer, pD = 7.1). Excited-state DFT calculations show that extensive charge redistribution in the Re-I(CO)(3) -> diimine (MLCT)-M-3 state occurs: excitation of this (MLCT)-M-3 state triggers several relaxation processes in Re-azurins whose kinetics strongly depend on the location of the metallolabel on the protein surface.
Workplace	J. Heyrovsky Institute of Physical Chemistry
Contact	Michaela Knapová, michaela.knapova@jh-inst.cas.cz, Tel.: 266 053 196
Year of Publishing	2010

Number of the records: 1