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Characterization and effects of binding of food-derived bioactive phycocyanobilin to bovine serum albumin

Authorized Users Only
2018
Authors
Minić, Simeon L.
Stanić-Vučinić, Dragana
Radomirović, Mirjana Ž.
Radibratović, Milica
Milčić, Miloš K.
Nikolić, Milan
Ćirković-Veličković, Tanja
Article (Published version)
Metadata
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Abstract
Phycocyanobilin (PCB) is a blue tetrapyrrole chromophore of C-phycocyanin, the main protein of the microalga Spirulina, with numerous proven health-related benefits. We examined binding of PCB to bovine serum albumin (BSA) and how it affects protein and ligand stability. Protein fluorescence quenching and microscale thermophoresis demonstrated high-affinity binding (K-a = 2 x 10(6) M-1). Spectroscopic titration with molecular docking analysis revealed two binding sites on BSA, at the inter-domain cleft and at subdomain IB, while CD spectroscopy indicated stereo-selective binding of the P conformer of the pigment to the protein. The PCB protein complex showed increased thermal stability. Although complex formation partly masked the antioxidant properties of PCB and BSA, a mutually protective effect against free radical-induced oxidation was found. BSA could be suitable for delivery of PCB as a food colorant or bioactive component. Our results also highlight subtle differences between PC...B binding to bovine vs. human serum albumin. (C) 2017 Elsevier Ltd. All rights reserved.

Keywords:
Spirulina / Phycocyanobilin / Bovine serum albumin / Binding / Stability / Antioxidant
Source:
Food Chemistry, 2018, 239, 1090-1099
Publisher:
  • Elsevier
Funding / projects:
  • Molecular properties and modifications of some respiratory and nutritional allergens (RS-172024)
  • Reinforcement of the Faculty of Chemistry, University of Belgrade, towards becoming a Center of Excellence in the region of WB for Molecular Biotechnology and Food research (EU-256716)
Note:
  • Peer-reviewed article: http://cherry.chem.bg.ac.rs/handle/123456789/3035
  • Supplementary material: http://cherry.chem.bg.ac.rs/handle/123456789/3139

DOI: 10.1016/j.foodchem.2017.07.066

ISSN: 0308-8146

PubMed: 28873526

WoS: 000408740200129

Scopus: 2-s2.0-85024374977
[ Google Scholar ]
33
21
URI
https://cherry.chem.bg.ac.rs/handle/123456789/2515
Collections
  • Publikacije / Publications
Institution/Community
Hemijski fakultet / Faculty of Chemistry
TY  - JOUR
AU  - Minić, Simeon L.
AU  - Stanić-Vučinić, Dragana
AU  - Radomirović, Mirjana Ž.
AU  - Radibratović, Milica
AU  - Milčić, Miloš K.
AU  - Nikolić, Milan
AU  - Ćirković-Veličković, Tanja
PY  - 2018
UR  - https://cherry.chem.bg.ac.rs/handle/123456789/2515
AB  - Phycocyanobilin (PCB) is a blue tetrapyrrole chromophore of C-phycocyanin, the main protein of the microalga Spirulina, with numerous proven health-related benefits. We examined binding of PCB to bovine serum albumin (BSA) and how it affects protein and ligand stability. Protein fluorescence quenching and microscale thermophoresis demonstrated high-affinity binding (K-a = 2 x 10(6) M-1). Spectroscopic titration with molecular docking analysis revealed two binding sites on BSA, at the inter-domain cleft and at subdomain IB, while CD spectroscopy indicated stereo-selective binding of the P conformer of the pigment to the protein. The PCB protein complex showed increased thermal stability. Although complex formation partly masked the antioxidant properties of PCB and BSA, a mutually protective effect against free radical-induced oxidation was found. BSA could be suitable for delivery of PCB as a food colorant or bioactive component. Our results also highlight subtle differences between PCB binding to bovine vs. human serum albumin. (C) 2017 Elsevier Ltd. All rights reserved.
PB  - Elsevier
T2  - Food Chemistry
T1  - Characterization and effects of binding of food-derived bioactive phycocyanobilin to bovine serum albumin
VL  - 239
SP  - 1090
EP  - 1099
DO  - 10.1016/j.foodchem.2017.07.066
ER  - 
@article{
author = "Minić, Simeon L. and Stanić-Vučinić, Dragana and Radomirović, Mirjana Ž. and Radibratović, Milica and Milčić, Miloš K. and Nikolić, Milan and Ćirković-Veličković, Tanja",
year = "2018",
abstract = "Phycocyanobilin (PCB) is a blue tetrapyrrole chromophore of C-phycocyanin, the main protein of the microalga Spirulina, with numerous proven health-related benefits. We examined binding of PCB to bovine serum albumin (BSA) and how it affects protein and ligand stability. Protein fluorescence quenching and microscale thermophoresis demonstrated high-affinity binding (K-a = 2 x 10(6) M-1). Spectroscopic titration with molecular docking analysis revealed two binding sites on BSA, at the inter-domain cleft and at subdomain IB, while CD spectroscopy indicated stereo-selective binding of the P conformer of the pigment to the protein. The PCB protein complex showed increased thermal stability. Although complex formation partly masked the antioxidant properties of PCB and BSA, a mutually protective effect against free radical-induced oxidation was found. BSA could be suitable for delivery of PCB as a food colorant or bioactive component. Our results also highlight subtle differences between PCB binding to bovine vs. human serum albumin. (C) 2017 Elsevier Ltd. All rights reserved.",
publisher = "Elsevier",
journal = "Food Chemistry",
title = "Characterization and effects of binding of food-derived bioactive phycocyanobilin to bovine serum albumin",
volume = "239",
pages = "1090-1099",
doi = "10.1016/j.foodchem.2017.07.066"
}
Minić, S. L., Stanić-Vučinić, D., Radomirović, M. Ž., Radibratović, M., Milčić, M. K., Nikolić, M.,& Ćirković-Veličković, T.. (2018). Characterization and effects of binding of food-derived bioactive phycocyanobilin to bovine serum albumin. in Food Chemistry
Elsevier., 239, 1090-1099.
https://doi.org/10.1016/j.foodchem.2017.07.066
Minić SL, Stanić-Vučinić D, Radomirović MŽ, Radibratović M, Milčić MK, Nikolić M, Ćirković-Veličković T. Characterization and effects of binding of food-derived bioactive phycocyanobilin to bovine serum albumin. in Food Chemistry. 2018;239:1090-1099.
doi:10.1016/j.foodchem.2017.07.066 .
Minić, Simeon L., Stanić-Vučinić, Dragana, Radomirović, Mirjana Ž., Radibratović, Milica, Milčić, Miloš K., Nikolić, Milan, Ćirković-Veličković, Tanja, "Characterization and effects of binding of food-derived bioactive phycocyanobilin to bovine serum albumin" in Food Chemistry, 239 (2018):1090-1099,
https://doi.org/10.1016/j.foodchem.2017.07.066 . .

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