Biliverdin-copper complex at physiological pH
Samo za registrovane korisnike
2019
Autori
Dimitrijević, Milena S.Bogdanović Pristov, Jelena

Žižić, Milan
Stanković, Dalibor

Bajuk-Bogdanović, Danica

Stanić, Marina

Spasić, Snežana

Hagen, Wilfred
Spasojević, Ivan

Članak u časopisu (Objavljena verzija)

Metapodaci
Prikaz svih podataka o dokumentuApstrakt
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.
Izvor:
Dalton Transactions, 2019, 48, 18, 6061-6070Finansiranje / projekti:
- Modifikacije antioksidativnog metabolizma biljaka sa ciljem povećanja tolerancije na abiotski stres i identifikacija novih biomarkera sa primenom u remedijaciji i monitoringu degradiranih staništa (RS-43010)
- Strengthening of the MagBioVin Research and Innovation Team for Development of Novel Approaches for Tumour Therapy based on Nanostructured Materials (EU-621375)
Napomena:
- Peer-reviewed version: http://cer.ihtm.bg.ac.rs/handle/123456789/2933
DOI: 10.1039/c8dt04724c
ISSN: 1477-9226
WoS: 000472449300020
Scopus: 2-s2.0-85065545631
Institucija/grupa
IHTMTY - JOUR AU - Dimitrijević, Milena S. AU - Bogdanović Pristov, Jelena AU - Žižić, Milan AU - Stanković, Dalibor AU - Bajuk-Bogdanović, Danica AU - Stanić, Marina AU - Spasić, Snežana AU - Hagen, Wilfred AU - Spasojević, Ivan PY - 2019 UR - https://cer.ihtm.bg.ac.rs/handle/123456789/2932 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 and Bajuk-Bogdanović, Danica and Stanić, Marina and Spasić, Snežana 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., Bajuk-Bogdanović, D., Stanić, M., Spasić, S., 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 D, Bajuk-Bogdanović D, Stanić M, Spasić S, 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, Bajuk-Bogdanović, Danica, Stanić, Marina, Spasić, Snežana, 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 . .