Links between peptides and Mn oxide: Nano-sized manganese oxide embedded in a peptide matrix

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

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Herein we report on a poly-peptide/Mn oxide nanocomposite as a model for the water-oxidizing catalyst in Photosystem II. The material is obtained by the reaction of poly-l-tyrosine, Mn(OAc)2·4H2O and KMnO4. HRTEM images of the nanocomposite indicate the presence of nanoparticles dispersed in a poly-l-tyrosine matrix with no crystalline phases. A broad peak at ∼400-550 nm in the UV-visible spectrum is related to Mn oxide formation. X-ray absorption studies suggest that the Mn atoms are in the oxidation state of +IV and a coordination number of around three was obtained for Mn in the structure. The water-oxidizing activity of the material under electrochemical conditions was also investigated. Electrochemical experiments proved the presence of Mn(iv) oxide. Determination of oxygen coupled to electrochemistry revealed the role of poly-l-tyrosine in decreasing the overpotential for water oxidation. In the next step, the interaction of the nanocomposite and imidazole as a model for the tyrosine 161 and histidine 190 residues in Photosystem II was studied with fluorescence spectroscopy using the multivariate curve resolution-alternating least squares method.

Original languageEnglish
Pages (from-to)10067-10077
Number of pages11
JournalNew Journal of Chemistry
Volume42
Issue number12
DOIs
Publication statusPublished - Jan 1 2018
Externally publishedYes

Fingerprint

Manganese oxide
Oxides
Peptides
Tyrosine
Nanocomposites
Photosystem II Protein Complex
Water
Oxidation
Fluorescence spectroscopy
X ray absorption
Electrochemistry
Histidine
Nanoparticles
Crystalline materials
Atoms
Catalysts
Oxygen
manganese oxide
Experiments

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)
  • Materials Chemistry

Cite this

Najafpour, M. M., Madadkhani, S., Akbarian, S., Zand, Z., Hołyńska, M., Kompany-Zareh, M., ... Allakhverdiev, S. (2018). Links between peptides and Mn oxide: Nano-sized manganese oxide embedded in a peptide matrix. New Journal of Chemistry, 42(12), 10067-10077. https://doi.org/10.1039/c8nj02119h

Links between peptides and Mn oxide : Nano-sized manganese oxide embedded in a peptide matrix. / Najafpour, Mohammad Mahdi; Madadkhani, Sepideh; Akbarian, Somayyeh; Zand, Zahra; Hołyńska, Małgorzata; Kompany-Zareh, Mohsen; Tatsuya, Tomo; Singh, Jitendra Pal; Chae, Keun Hwa; Allakhverdiev, Suleyman.

In: New Journal of Chemistry, Vol. 42, No. 12, 01.01.2018, p. 10067-10077.

Research output: Contribution to journalArticle

Najafpour, MM, Madadkhani, S, Akbarian, S, Zand, Z, Hołyńska, M, Kompany-Zareh, M, Tatsuya, T, Singh, JP, Chae, KH & Allakhverdiev, S 2018, 'Links between peptides and Mn oxide: Nano-sized manganese oxide embedded in a peptide matrix', New Journal of Chemistry, vol. 42, no. 12, pp. 10067-10077. https://doi.org/10.1039/c8nj02119h
Najafpour MM, Madadkhani S, Akbarian S, Zand Z, Hołyńska M, Kompany-Zareh M et al. Links between peptides and Mn oxide: Nano-sized manganese oxide embedded in a peptide matrix. New Journal of Chemistry. 2018 Jan 1;42(12):10067-10077. https://doi.org/10.1039/c8nj02119h
Najafpour, Mohammad Mahdi ; Madadkhani, Sepideh ; Akbarian, Somayyeh ; Zand, Zahra ; Hołyńska, Małgorzata ; Kompany-Zareh, Mohsen ; Tatsuya, Tomo ; Singh, Jitendra Pal ; Chae, Keun Hwa ; Allakhverdiev, Suleyman. / Links between peptides and Mn oxide : Nano-sized manganese oxide embedded in a peptide matrix. In: New Journal of Chemistry. 2018 ; Vol. 42, No. 12. pp. 10067-10077.
@article{64f49a81845247cca64ff762257169dd,
title = "Links between peptides and Mn oxide: Nano-sized manganese oxide embedded in a peptide matrix",
abstract = "Herein we report on a poly-peptide/Mn oxide nanocomposite as a model for the water-oxidizing catalyst in Photosystem II. The material is obtained by the reaction of poly-l-tyrosine, Mn(OAc)2·4H2O and KMnO4. HRTEM images of the nanocomposite indicate the presence of nanoparticles dispersed in a poly-l-tyrosine matrix with no crystalline phases. A broad peak at ∼400-550 nm in the UV-visible spectrum is related to Mn oxide formation. X-ray absorption studies suggest that the Mn atoms are in the oxidation state of +IV and a coordination number of around three was obtained for Mn in the structure. The water-oxidizing activity of the material under electrochemical conditions was also investigated. Electrochemical experiments proved the presence of Mn(iv) oxide. Determination of oxygen coupled to electrochemistry revealed the role of poly-l-tyrosine in decreasing the overpotential for water oxidation. In the next step, the interaction of the nanocomposite and imidazole as a model for the tyrosine 161 and histidine 190 residues in Photosystem II was studied with fluorescence spectroscopy using the multivariate curve resolution-alternating least squares method.",
author = "Najafpour, {Mohammad Mahdi} and Sepideh Madadkhani and Somayyeh Akbarian and Zahra Zand and Małgorzata Hołyńska and Mohsen Kompany-Zareh and Tomo Tatsuya and Singh, {Jitendra Pal} and Chae, {Keun Hwa} and Suleyman Allakhverdiev",
year = "2018",
month = "1",
day = "1",
doi = "10.1039/c8nj02119h",
language = "English",
volume = "42",
pages = "10067--10077",
journal = "New Journal of Chemistry",
issn = "1144-0546",
publisher = "Royal Society of Chemistry",
number = "12",

}

TY - JOUR

T1 - Links between peptides and Mn oxide

T2 - Nano-sized manganese oxide embedded in a peptide matrix

AU - Najafpour, Mohammad Mahdi

AU - Madadkhani, Sepideh

AU - Akbarian, Somayyeh

AU - Zand, Zahra

AU - Hołyńska, Małgorzata

AU - Kompany-Zareh, Mohsen

AU - Tatsuya, Tomo

AU - Singh, Jitendra Pal

AU - Chae, Keun Hwa

AU - Allakhverdiev, Suleyman

PY - 2018/1/1

Y1 - 2018/1/1

N2 - Herein we report on a poly-peptide/Mn oxide nanocomposite as a model for the water-oxidizing catalyst in Photosystem II. The material is obtained by the reaction of poly-l-tyrosine, Mn(OAc)2·4H2O and KMnO4. HRTEM images of the nanocomposite indicate the presence of nanoparticles dispersed in a poly-l-tyrosine matrix with no crystalline phases. A broad peak at ∼400-550 nm in the UV-visible spectrum is related to Mn oxide formation. X-ray absorption studies suggest that the Mn atoms are in the oxidation state of +IV and a coordination number of around three was obtained for Mn in the structure. The water-oxidizing activity of the material under electrochemical conditions was also investigated. Electrochemical experiments proved the presence of Mn(iv) oxide. Determination of oxygen coupled to electrochemistry revealed the role of poly-l-tyrosine in decreasing the overpotential for water oxidation. In the next step, the interaction of the nanocomposite and imidazole as a model for the tyrosine 161 and histidine 190 residues in Photosystem II was studied with fluorescence spectroscopy using the multivariate curve resolution-alternating least squares method.

AB - Herein we report on a poly-peptide/Mn oxide nanocomposite as a model for the water-oxidizing catalyst in Photosystem II. The material is obtained by the reaction of poly-l-tyrosine, Mn(OAc)2·4H2O and KMnO4. HRTEM images of the nanocomposite indicate the presence of nanoparticles dispersed in a poly-l-tyrosine matrix with no crystalline phases. A broad peak at ∼400-550 nm in the UV-visible spectrum is related to Mn oxide formation. X-ray absorption studies suggest that the Mn atoms are in the oxidation state of +IV and a coordination number of around three was obtained for Mn in the structure. The water-oxidizing activity of the material under electrochemical conditions was also investigated. Electrochemical experiments proved the presence of Mn(iv) oxide. Determination of oxygen coupled to electrochemistry revealed the role of poly-l-tyrosine in decreasing the overpotential for water oxidation. In the next step, the interaction of the nanocomposite and imidazole as a model for the tyrosine 161 and histidine 190 residues in Photosystem II was studied with fluorescence spectroscopy using the multivariate curve resolution-alternating least squares method.

UR - http://www.scopus.com/inward/record.url?scp=85048360817&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85048360817&partnerID=8YFLogxK

U2 - 10.1039/c8nj02119h

DO - 10.1039/c8nj02119h

M3 - Article

AN - SCOPUS:85048360817

VL - 42

SP - 10067

EP - 10077

JO - New Journal of Chemistry

JF - New Journal of Chemistry

SN - 1144-0546

IS - 12

ER -