Biliverdin-copper complex at physiological pH
Само за регистроване кориснике
2019
Аутори
Dimitrijević, Milena S.Bogdanović-Pristov, Jelena
Žižić, Milan
Stanković, Dalibor M.
Bajuk-Bogdanović, Danica V.
Stanić, Marina
Spasić, Snežana D.
Hagen, Wilfred
Spasojević, Ivan
Чланак у часопису (Објављена верзија)
Метаподаци
Приказ свих података о документуАпстракт
Biliverdin (BV), a product of heme catabolism, is known to interact with transition metals, but the details of such interactions under physiological conditions are scarce. Herein, we examined coordinate/redox interactions of BV with Cu2+ in phosphate buffer at pH 7.4, using spectrophotometry, HESI-MS, Raman spectroscopy, 1 H NMR, EPR, fluorimetry, and electrochemical methods. BV formed a stable coordination complex with copper in 1 : 1 stoichiometry. The structure of BV was more planar and energetically stable in the complex. The complex showed strong paramagnetic effects that were attributed to an unpaired delocalized e−. The delocalized electron may come from BV or Cu2+, so the complex is formally composed either of BV radical cation and Cu1+ or of BV radical anion and Cu3+. The complex underwent oxidation only in the presence of both O2 and an excess of Cu2+, or a strong oxidizing agent, and it was resistant to reducing agents. The biological effects of the stable BV metallocomplex ...containing a delocalized unpaired electron should be further examined, and may provide an answer to the long-standing question of high energy investment in the catabolism of BV, which represents a relatively harmless molecule per se.
Извор:
Dalton Transactions, 2019, 48, 18, 6061-6070Финансирање / пројекти:
- Модификације антиоксидативног метаболизма биљака са циљем повећања толеранције на абиотски стрес и идентификација нових биомаркера са применом у ремедијацији и мониторингу деградираних станишта (RS-MESTD-Integrated and Interdisciplinary Research (IIR or III)-43010)
- Strengthening of the MagBioVin Research and Innovation Team for Development of Novel Approaches for Tumour Therapy based on Nanostructured Materials (EU-FP7-621375)
Напомена:
- Supplementary material: http://cherry.chem.bg.ac.rs/handle/123456789/3069
- Peer-reviewed manuscript: http://vinar.vin.bg.ac.rs/handle/123456789/8258
DOI: 10.1039/c8dt04724c
ISSN: 1477-9226; 1477-9234
PubMed: 30734795
WoS: 000472449300020
Scopus: 2-s2.0-85065545631
URI
http://cherry.chem.bg.ac.rs/handle/123456789/3066https://vinar.vin.bg.ac.rs/handle/123456789/8200
Колекције
Институција/група
VinčaTY - JOUR AU - Dimitrijević, Milena S. AU - Bogdanović-Pristov, Jelena AU - Žižić, Milan AU - Stanković, Dalibor M. AU - Bajuk-Bogdanović, Danica V. AU - Stanić, Marina AU - Spasić, Snežana D. AU - Hagen, Wilfred AU - Spasojević, Ivan PY - 2019 UR - http://cherry.chem.bg.ac.rs/handle/123456789/3066 UR - https://vinar.vin.bg.ac.rs/handle/123456789/8200 AB - Biliverdin (BV), a product of heme catabolism, is known to interact with transition metals, but the details of such interactions under physiological conditions are scarce. Herein, we examined coordinate/redox interactions of BV with Cu2+ in phosphate buffer at pH 7.4, using spectrophotometry, HESI-MS, Raman spectroscopy, 1 H NMR, EPR, fluorimetry, and electrochemical methods. BV formed a stable coordination complex with copper in 1 : 1 stoichiometry. The structure of BV was more planar and energetically stable in the complex. The complex showed strong paramagnetic effects that were attributed to an unpaired delocalized e−. The delocalized electron may come from BV or Cu2+, so the complex is formally composed either of BV radical cation and Cu1+ or of BV radical anion and Cu3+. The complex underwent oxidation only in the presence of both O2 and an excess of Cu2+, or a strong oxidizing agent, and it was resistant to reducing agents. The biological effects of the stable BV metallocomplex containing a delocalized unpaired electron should be further examined, and may provide an answer to the long-standing question of high energy investment in the catabolism of BV, which represents a relatively harmless molecule per se. T2 - Dalton Transactions T1 - Biliverdin-copper complex at physiological pH VL - 48 IS - 18 SP - 6061 EP - 6070 DO - 10.1039/c8dt04724c ER -
@article{ author = "Dimitrijević, Milena S. and Bogdanović-Pristov, Jelena and Žižić, Milan and Stanković, Dalibor M. and Bajuk-Bogdanović, Danica V. and Stanić, Marina and Spasić, Snežana D. and Hagen, Wilfred and Spasojević, Ivan", year = "2019", abstract = "Biliverdin (BV), a product of heme catabolism, is known to interact with transition metals, but the details of such interactions under physiological conditions are scarce. Herein, we examined coordinate/redox interactions of BV with Cu2+ in phosphate buffer at pH 7.4, using spectrophotometry, HESI-MS, Raman spectroscopy, 1 H NMR, EPR, fluorimetry, and electrochemical methods. BV formed a stable coordination complex with copper in 1 : 1 stoichiometry. The structure of BV was more planar and energetically stable in the complex. The complex showed strong paramagnetic effects that were attributed to an unpaired delocalized e−. The delocalized electron may come from BV or Cu2+, so the complex is formally composed either of BV radical cation and Cu1+ or of BV radical anion and Cu3+. The complex underwent oxidation only in the presence of both O2 and an excess of Cu2+, or a strong oxidizing agent, and it was resistant to reducing agents. The biological effects of the stable BV metallocomplex containing a delocalized unpaired electron should be further examined, and may provide an answer to the long-standing question of high energy investment in the catabolism of BV, which represents a relatively harmless molecule per se.", journal = "Dalton Transactions", title = "Biliverdin-copper complex at physiological pH", volume = "48", number = "18", pages = "6061-6070", doi = "10.1039/c8dt04724c" }
Dimitrijević, M. S., Bogdanović-Pristov, J., Žižić, M., Stanković, D. M., Bajuk-Bogdanović, D. V., Stanić, M., Spasić, S. D., Hagen, W.,& Spasojević, I.. (2019). Biliverdin-copper complex at physiological pH. in Dalton Transactions, 48(18), 6061-6070. https://doi.org/10.1039/c8dt04724c
Dimitrijević MS, Bogdanović-Pristov J, Žižić M, Stanković DM, Bajuk-Bogdanović DV, Stanić M, Spasić SD, Hagen W, Spasojević I. Biliverdin-copper complex at physiological pH. in Dalton Transactions. 2019;48(18):6061-6070. doi:10.1039/c8dt04724c .
Dimitrijević, Milena S., Bogdanović-Pristov, Jelena, Žižić, Milan, Stanković, Dalibor M., Bajuk-Bogdanović, Danica V., Stanić, Marina, Spasić, Snežana D., Hagen, Wilfred, Spasojević, Ivan, "Biliverdin-copper complex at physiological pH" in Dalton Transactions, 48, no. 18 (2019):6061-6070, https://doi.org/10.1039/c8dt04724c . .