Temat: energy transfer - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Fluorescence decay time distribution analysis of cyclic enkephalin analogues; Influence of solvent and Leu configuration in position 5 on conformation
Autorzy:: Malicka, Joanna
Ganzynkowicz, Robert
Groth, Małgorzata
Czaplewski, Cezary
Karolczak, Jerzy
Liwo, Adam
Wiczk, Wiesław
Powiązania:: https://bibliotekanauki.pl/articles/1044169.pdf
Data publikacji:: 2001
Wydawca:: Polskie Towarzystwo Biochemiczne
Tematy:: lifetime distribution
fluorescence
energy transfer
conformation
enkephalin
Opis:: Lifetime distribution analysis were performed to study the influence of Leu configuration in position 5 on changes of the peptide chain of cyclic analogues of enkephalins containing a fluorescence donor and acceptor in different solvents. The configuration change of Leu5 in all the analogues of enkephalins studied which contain donor-acceptor pairs has no apparent influence on Trp lifetime distributions. In contrast, there is a significant solvent effect on the shape of lifetime distribution.
Źródło:: Acta Biochimica Polonica; 2001, 48, 1; 95-102
0001-527X
Pojawia się w:: Acta Biochimica Polonica
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Interaction of anesthetic supplement thiopental with human serum albumin
Autorzy:: Khan, Shahper
Islam, Barira
Rajeswari, M
Usmani,, Hammad
Khan, Asad
Powiązania:: https://bibliotekanauki.pl/articles/1040762.pdf
Data publikacji:: 2008
Wydawca:: Polskie Towarzystwo Biochemiczne
Tematy:: thiopental
fluorescence resonance energy transfer
thermodynamics
FT-IR
circular dichroism
Opis:: Thiopental (TPL) is a commonly used barbiturate anesthetic. Its binding with human serum albumin (HSA) was studied to explore the anesthetic-induced protein dysfunction. The basic binding interaction was studied by UV-absorption and fluorescence spectroscopy. An increase in the binding affinity (K) and in the number of binding sites (n) with the increasing albumin concentration was observed. The interaction was conformation-dependent and the highest for the F isomer of HSA, which implicates its slow elimination. The mode of binding was characterized using various thermodynamic parameters. Domain II of HSA was found to possess a high affinity binding site for TPL. The effect of micro-metal ions on the binding affinity was also investigated. The molecular distance, r, between donor (HSA) and acceptor (TPL) was estimated by fluorescence resonance energy transfer (FRET). Correlation between the stability of the TPL-N and TPL-F complexes and drug distribution is discussed. The structural changes in the protein investigated by circular dichroism (CD) and Fourier transform infrared (FT-IR) spectroscopy reflect perturbation of the albumin molecule and provide an explanation for the heterogeneity of action of this anesthetic.
Źródło:: Acta Biochimica Polonica; 2008, 55, 2; 399-409
0001-527X
Pojawia się w:: Acta Biochimica Polonica
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Methods of peptide conformation studies.
Autorzy:: Biedrzyński, Andrzej
Powiązania:: https://bibliotekanauki.pl/articles/1044052.pdf
Data publikacji:: 2001
Wydawca:: Polskie Towarzystwo Biochemiczne
Tematy:: fluorescence resonance energy transfer
NMR
circular dichroism
peptide conformation
hydrogen exchange
Opis:: In solution most of the peptides assume multiple flexible conformations. Determination of the dominant conformers and evaluation of their populations is the aim of peptide conformation studies, in which theoretical and experimental methods play complementary roles. Molecular dynamics or Monte Carlo methods are quite effective in searching the conformational space accessible to a peptide but they are not able to estimate, precisely enough, the populations of various conformations. Therefore, they must be supplemented by experimental data. In this paper, a short review of the experimental methods, most widely used in peptide conformational studies, is presented. Among them NMR plays the leading role. Valuable information is also obtained from hydrogen exchange, fluorescence resonance energy transfer, and circular dichroism measurements. The advantages and shortcomings of these methods are discussed.
Źródło:: Acta Biochimica Polonica; 2001, 48, 4; 1091-1099
0001-527X
Pojawia się w:: Acta Biochimica Polonica
Dostawca treści:: Biblioteka Nauki

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