A new strategy to make an artificial enzyme

Photosystem II around nanosized manganese oxide

Mohammad Mahdi Najafpour, Sepideh Madadkhani, Somayyeh Akbarian, Małgorzata Hołyńska, Mohsen Kompany-Zareh, Tatsuya Tomo, Jitendra Pal Singh, Keun Hwa Chae, Suleyman Allakhverdiev

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Herein we report a new strategy to disperse Mn oxide into the apoenzyme of photosystem II. The compound was characterized by scanning electron microscopy, transmission electron microscopy, UV-visible spectroscopy, Fourier transform infrared spectroscopy, X-ray absorption near edge structure, extended X-ray absorption fine structure, X-ray diffraction and some electrochemical methods. Under electrochemical conditions, the peaks attributed to Mn(ii)/(iii), Mn(iii)/(iv) and Mn(ii)/(iv) were assigned and compared with other manganese oxides. Linear sweep voltammetry shows that water electro-oxidation occurs at 80 mV less than that for the apoenzyme of photosystem II. Thus, Mn oxide maintains its water-oxidizing activity under these conditions. The compound is a new type of structural and functional model for the water-oxidizing complex in photosystem II.

Original languageEnglish
Pages (from-to)4451-4461
Number of pages11
JournalCatalysis Science and Technology
Volume7
Issue number19
DOIs
Publication statusPublished - Jan 1 2017
Externally publishedYes

Fingerprint

Photosystem II Protein Complex
Manganese oxide
Apoenzymes
Enzymes
X ray absorption
Oxides
Water
Electrooxidation
Voltammetry
Fourier transform infrared spectroscopy
Spectroscopy
Transmission electron microscopy
X ray diffraction
Scanning electron microscopy
manganese oxide

ASJC Scopus subject areas

  • Catalysis

Cite this

Najafpour, M. M., Madadkhani, S., Akbarian, S., Hołyńska, M., Kompany-Zareh, M., Tomo, T., ... Allakhverdiev, S. (2017). A new strategy to make an artificial enzyme: Photosystem II around nanosized manganese oxide. Catalysis Science and Technology, 7(19), 4451-4461. https://doi.org/10.1039/c7cy01654a

A new strategy to make an artificial enzyme : Photosystem II around nanosized manganese oxide. / Najafpour, Mohammad Mahdi; Madadkhani, Sepideh; Akbarian, Somayyeh; Hołyńska, Małgorzata; Kompany-Zareh, Mohsen; Tomo, Tatsuya; Singh, Jitendra Pal; Chae, Keun Hwa; Allakhverdiev, Suleyman.

In: Catalysis Science and Technology, Vol. 7, No. 19, 01.01.2017, p. 4451-4461.

Research output: Contribution to journalArticle

Najafpour, MM, Madadkhani, S, Akbarian, S, Hołyńska, M, Kompany-Zareh, M, Tomo, T, Singh, JP, Chae, KH & Allakhverdiev, S 2017, 'A new strategy to make an artificial enzyme: Photosystem II around nanosized manganese oxide', Catalysis Science and Technology, vol. 7, no. 19, pp. 4451-4461. https://doi.org/10.1039/c7cy01654a
Najafpour MM, Madadkhani S, Akbarian S, Hołyńska M, Kompany-Zareh M, Tomo T et al. A new strategy to make an artificial enzyme: Photosystem II around nanosized manganese oxide. Catalysis Science and Technology. 2017 Jan 1;7(19):4451-4461. https://doi.org/10.1039/c7cy01654a
Najafpour, Mohammad Mahdi ; Madadkhani, Sepideh ; Akbarian, Somayyeh ; Hołyńska, Małgorzata ; Kompany-Zareh, Mohsen ; Tomo, Tatsuya ; Singh, Jitendra Pal ; Chae, Keun Hwa ; Allakhverdiev, Suleyman. / A new strategy to make an artificial enzyme : Photosystem II around nanosized manganese oxide. In: Catalysis Science and Technology. 2017 ; Vol. 7, No. 19. pp. 4451-4461.
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