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dc.contributor.author | Bonancía Roca, Paula![]() |
es_ES |
dc.contributor.author | Vayá Pérez, Ignacio![]() |
es_ES |
dc.contributor.author | Jiménez Molero, María Consuelo![]() |
es_ES |
dc.contributor.author | Miranda Alonso, Miguel Ángel![]() |
es_ES |
dc.date.accessioned | 2016-03-07T09:48:00Z | |
dc.date.issued | 2012-12-27 | |
dc.identifier.issn | 1520-6106 | |
dc.identifier.uri | http://hdl.handle.net/10251/61512 | |
dc.description.abstract | The two enantiomers of 2-(2-hydroxybiphenyl-4-yl)propanoic acid ((S)- and (R)-BPOH) have been selected as probes for human serum albumin (HSA). Photophysical characterization in the absence of protein led to emission maxima, singlet energies, quantum yields, and fluorescence lifetime values of 332 nm, 91 kcal mol(-1), and 0.28 and 1.8 ns for BPOH or 414 nm, 79 kcal mol(-1), and 0.31 and 3.3 ns for the corresponding phenolate BPO-; the pK(a)* was found to be 1.17. In the presence of HSA, a light-absorbing ground-state complex (S)-BPOH@HSA was detected (maximum at ca. 300 nm) whose intensity increased with increasing protein concentration. The fluorescence spectra of (S)-BPOH in PBS, after addition of HSA, revealed a progressive diminution of the phenolate band, indicating that excited-state deprotonation is disfavored within the hydrophobic protein cavities. A similar trend was observed for (R)-BPOH, but the extent of deprotonation was significantly lower for this enantiomer. Addition of increasing amounts of the site II displacement probe (S)-ibuprofen ((S)-IBP) to BPOH@HSA led to a significant decrease of the absorption maximum at ca. 300 nm and to a recovery of the phenolate emission band at ca. 410 nm, which were again configuration dependent. The transient absorption spectrum of (S)-BPOH consisted on a broad band centered at 380 nm, attributed to the first triplet excited state. A dramatic enhancement of the triplet lifetimes within HSA was observed (19.0 mu s within protein versus 1.3 mu s in bulk PBS), although no stereodifferentiation was noticed in this case. | es_ES |
dc.description.sponsorship | Financial support from the Spanish Government (CTQ2010-14882, CTQ2009-13699, BES-2008-003314, JCI-2011-09926), from the Generalitat Valenciana (Prometeo 2008/090) and from the Universitat Politecnica de Valencia (PAID 05-11, 2766) is gratefully acknowledged. | en_EN |
dc.language | Inglés | es_ES |
dc.publisher | American Chemical Society | es_ES |
dc.relation.ispartof | Journal of Physical Chemistry B | es_ES |
dc.rights | Reserva de todos los derechos | es_ES |
dc.subject | HUMAN-SERUM-ALBUMIN | es_ES |
dc.subject | DRUG BINDING-SITES | es_ES |
dc.subject | 2-ANTHRACENECARBOXYLATE | es_ES |
dc.subject | PHOTOCYCLODIMERIZATION | es_ES |
dc.subject | STEREODIFFERENTIATION | es_ES |
dc.subject | FLUORESCENCE | es_ES |
dc.subject | FLURBIPROFEN | es_ES |
dc.subject | ANTHRACENE | es_ES |
dc.subject.classification | QUIMICA ORGANICA | es_ES |
dc.subject.classification | QUIMICA ANALITICA | es_ES |
dc.title | Intraprotein formation of a long wavelength absorbing complex and inhibition of excited state deprotonation in a chiral hydroxybiphenyl | es_ES |
dc.type | Artículo | es_ES |
dc.embargo.lift | 10000-01-01 | |
dc.embargo.terms | forever | es_ES |
dc.identifier.doi | 10.1021/jp310587s | |
dc.relation.projectID | info:eu-repo/grantAgreement/MICINN//CTQ2010-14882/ES/DIADAS FOTOACTIVAS COMO SONDAS PARA LA GENERACION DE ESPECIES TRANSITORIAS EN SISTEMAS MICROHETEROGENEOS DE TIPO BIOMIMETICO/ / | es_ES |
dc.relation.projectID | info:eu-repo/grantAgreement/GVA//PROMETEO08%2F2008%2F090/ES/Especies fotoactivas como sondas para proteínas/ | es_ES |
dc.relation.projectID | info:eu-repo/grantAgreement/UPV//PAID-05-11-2766/ | es_ES |
dc.relation.projectID | info:eu-repo/grantAgreement/MICINN//BES-2008-003314/ES/BES-2008-003314/ | es_ES |
dc.relation.projectID | info:eu-repo/grantAgreement/MICINN//JCI-2011-09926/ES/JCI-2011-09926/ | es_ES |
dc.relation.projectID | info:eu-repo/grantAgreement/MICINN//CTQ2009-13699/ES/CTQ2009-13699/ | es_ES |
dc.rights.accessRights | Cerrado | es_ES |
dc.contributor.affiliation | Universitat Politècnica de València. Departamento de Química - Departament de Química | es_ES |
dc.contributor.affiliation | Universitat Politècnica de València. Instituto Universitario Mixto de Tecnología Química - Institut Universitari Mixt de Tecnologia Química | es_ES |
dc.description.bibliographicCitation | Bonancía Roca, P.; Vayá Pérez, I.; Jiménez Molero, MC.; Miranda Alonso, MÁ. (2012). Intraprotein formation of a long wavelength absorbing complex and inhibition of excited state deprotonation in a chiral hydroxybiphenyl. Journal of Physical Chemistry B. 116(51):14839-14843. https://doi.org/10.1021/jp310587s | es_ES |
dc.description.accrualMethod | S | es_ES |
dc.relation.publisherversion | http://dx.doi.org/10.1021/jp310587s | es_ES |
dc.description.upvformatpinicio | 14839 | es_ES |
dc.description.upvformatpfin | 14843 | es_ES |
dc.type.version | info:eu-repo/semantics/publishedVersion | es_ES |
dc.description.volume | 116 | es_ES |
dc.description.issue | 51 | es_ES |
dc.relation.senia | 233793 | es_ES |
dc.contributor.funder | Ministerio de Ciencia e Innovación | es_ES |
dc.contributor.funder | Generalitat Valenciana | es_ES |
dc.contributor.funder | Universitat Politècnica de València | es_ES |