Oxidized amino acid residues in the vicinity of Q(A) and Pheo(D1) of the photosystem II reaction center: putative generation sites of reducing-side reactive oxygen species.

Szczegóły
Abstrakt

Tytuł:: Oxidized amino acid residues in the vicinity of Q(A) and Pheo(D1) of the photosystem II reaction center: putative generation sites of reducing-side reactive oxygen species.
Autorzy:: Frankel LK; Department of Biological Sciences, Division of Biochemistry and Molecular Biology, Louisiana State University, Baton Rouge, Louisiana, United States of America.
Sallans L
Limbach PA
Bricker TM
Źródło:: PloS one [PLoS One] 2013; Vol. 8 (2), pp. e58042. Date of Electronic Publication: 2013 Feb 28.
Typ publikacji:: Journal Article; Research Support, N.I.H., Extramural; Research Support, U.S. Gov't, Non-P.H.S.
Język:: English
Imprint Name(s):: Original Publication: San Francisco, CA : Public Library of Science
MeSH Terms:: Amino Acids*
Photosystem II Protein Complex/*chemistry
Photosystem II Protein Complex/*metabolism
Reactive Oxygen Species/*metabolism
Amino Acid Sequence ; Catalytic Domain ; Mass Spectrometry ; Models, Molecular ; Molecular Sequence Data ; Oxidation-Reduction ; Spinacia oleracea/enzymology ; Spinacia oleracea/growth & development ; Spinacia oleracea/metabolism
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Grant Information:: R01 GM058843 United States GM NIGMS NIH HHS; RR019900 United States RR NCRR NIH HHS; S10 RR019900 United States RR NCRR NIH HHS; R56 GM058843 United States GM NIGMS NIH HHS; GM58843 United States GM NIGMS NIH HHS
Substance Nomenclature:: 0 (Amino Acids)
0 (Photosystem II Protein Complex)
0 (Reactive Oxygen Species)
Entry Date(s):: Date Created: 20130308 Date Completed: 20130829 Latest Revision: 20211021
Update Code:: 20240104
PubMed Central ID:: PMC3585169
DOI:: 10.1371/journal.pone.0058042
PMID:: 23469138
: Czasopismo naukowe

Pełny tekst

Under a variety of stress conditions, Photosystem II produces reactive oxygen species on both the reducing and oxidizing sides of the photosystem. A number of different sites including the Mn4O5Ca cluster, P680, PheoD1, QA, QB and cytochrome b559 have been hypothesized to produce reactive oxygen species in the photosystem. In this communication using Fourier-transform ion cyclotron resonance mass spectrometry we have identified several residues on the D1 and D2 proteins from spinach which are oxidatively modified and in close proximity to QA (D1 residues (239)F, (241)Q, (242)E and the D2 residues (238)P, (239)T, (242)E and (247)M) and PheoD1 (D1 residues (130)E, (133)L and (135)F). These residues may be associated with reactive oxygen species exit pathways located on the reducing side of the photosystem, and their modification may indicate that both QA and PheoD1 are sources of reactive oxygen species on the reducing side of Photosystem II.

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