Sauer, Paul V Cupellini, Lorenzo Sutter, Markus Bondanza, Mattia Domínguez Martin, María Agustina Kirst, Henning Bína, David Koh, Adrian Fujiet Kotecha, Abhay Greber, Basil J
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Cyanobacteria use large antenna complexes called phycobilisomes (PBSs) for light harvesting. However, intense light triggers non-photochemical quenching, where the orange carotenoid protein (OCP) binds to PBS, dissipating excess energy as heat. The mechanism of efficiently transferring energy from phycocyanobilins in PBS to canthaxanthin in OCP rem...
Rose, Justin B Gascón, José A Sutter, Markus Sheppard, Damien I Kerfeld, Cheryl A Beck, Warren F
The orange carotenoid protein (OCP) functions as a sensor of the ambient light intensity and as a quencher of bilin excitons when it binds to the core of the cyanobacterial phycobilisome. We show herein that the photoactivation mechanism that converts the resting, orange-colored state, OCPO, to the active red-colored state, OCPR, requires a sequenc...
Pishchalnikov, Roman Y Yaroshevich, Igor A Zlenko, Dmitry V Tsoraev, Georgy V Osipov, Evgenii M Lazarenko, Vladimir A Parshina, Evgenia Yu Chesalin, Denis D Sluchanko, Nikolai N Maksimov, Eugene G
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Published in
Photosynthesis research
Our analysis of the X-ray crystal structure of canthaxanthin (CAN) showed that its ketolated β-ionone rings can adopt two energetically equal, but structurally distinct puckers. Quantum chemistry calculations revealed that the potential energy surface of the β-ionone ring rotation over the plane of the conjugated π-system in carotenoids depends on ...
Yoshimi, Toru Hashimoto, Sakiko Kubo, Yuki Takeuchi, Masato Morimoto, Daichi Nakagawa, Satoshi Sawayama, Shigeki
Published in
Applied biochemistry and biotechnology
Aurantiochytrium limacinum is a heterotrophic eukaryotic microorganism that can accumulate high levels of commercial products such as astaxanthin and docosahexaenoic acid. Due to its rapid growth and relatively simple extraction method, A. limacinum is considered a promising astaxanthin resource to replace the conventional microalgal production. Ho...
Venil, Chidambaram Kulandaisamy Malathi, Mahalingam Devi, Ponnuswamy Renuka
Published in
3 Biotech
A bacterial strain was isolated from an oil-contaminated site and on its’ further characterization, exhibited the potential of synthesising metabolites and the ability to degrade crude oil. Its’ morphological, biochemical and 16S rRNA analysis suggested that the bacterium belongs to Dietzia maris AURCCBT01. This strain rapidly grew in the medium su...
Xue, Xueting Fan, Lixia Dong, Yanjie Yuan, Xuexia Wang, Lei Yang, Fabin Zheng, Yan Zhao, Shancang
Published in
Food additives & contaminants. Part A, Chemistry, analysis, control, exposure & risk assessment
Canthaxanthin is a colourant widely used in medicine, food and cosmetics, which is closely related to human eye dysfunction. The EU determines that the daily acceptable intake of canthaxanthin (ADI) is 0.03 mg canthaxanthin per kg body weight. In order to protect people's diet health and avoid the occurrence of food safety accidents, this paper mea...
Dominguez-Martin, Maria Agustina Hammel, Michal Gupta, Sayan Lechno-Yossef, Sigal Sutter, Markus Rosenberg, Daniel J Chen, Yan Petzold, Christopher J Ralston, Corie Y Polívka, Tomáš
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The Orange Carotenoid Protein (OCP) is a water-soluble protein that governs photoprotection in many cyanobacteria. The 35 kDa OCP is structurally and functionally modular, consisting of an N-terminal effector domain (NTD) and a C-terminal regulatory domain (CTD); a carotenoid spans the two domains. The CTD is a member of the ubiquitous Nuclear Tran...
Yang, Yi-Wen Yin, Yan-Chao Li, Zheng-Ke Huang, Da Shang, Jin-Long Chen, Min Qiu, Bao-Sheng
Published in
Photosynthesis Research
The remarkable drought-resistance of the terrestrial cyanobacterium Nostoc flagelliforme (N. flagelliforme) has attracted attention for many years. In this study, we purified a group of red proteins that accumulate in dried field samples of N. flagelliforme. These red proteins contain canthaxanthin as the bound chromophore. Native-PAGE analysis rev...
Arab, Masoumeh Hosseini, Seyede Marzieh Nayebzadeh, Kooshan Khorshidian, Nasim Yousefi, Mojtaba Razavi, Seyed Hadi Mortazavian, Amir Mohammad
Published in
International journal of biological macromolecules
Canthaxanthin (CX) is an orange-red keto-carotenoid with high antioxidant activity. This functional pigment is sensitive to oxygen, light, pH and heat. In this study, CX was produced by the Dietzia natronolimnaea HS-1 and was encapsulated in Alginate (Alg) and Alg-high methoxyl pectin (HMP) through O/W/O multiple emulsion/external gelation method t...
Dellero, Younès Cagnac, Olivier Rose, Suzanne Seddiki, Khawla Cussac, Mathilde Morabito, Christian Lupette, Josselin Aiese Cigliano, Riccardo Sanseverino, Walter Kuntz, Marcel
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