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43 results

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Page 1
Redox reactions of the non-heme iron in photosystem II: an EPR spectroscopic study.
McEvoy JP, Brudvig GW. McEvoy JP, et al. Biochemistry. 2008 Dec 16;47(50):13394-403. doi: 10.1021/bi8013888. Biochemistry. 2008. PMID: 19053286
The observation of non-heme iron photoreduction at cryogenic temperatures (possibly at liquid helium temperatures and certainly above 75 K) implies the existence of a low reorganization energy proton-transfer (ET) pathway within the protein to the non- …
The observation of non-heme iron photoreduction at cryogenic temperatures (possibly at liquid helium temperatures and c …
Diet composition impacts the natural history of steatotic liver disease.
Callans LE, Ivey KL, Chang KM, Kaplan DE; VA Million Veteran Program. Callans LE, et al. Hepatol Commun. 2025 Jun 19;9(7):e0754. doi: 10.1097/HC9.0000000000000754. eCollection 2025 Jul 1. Hepatol Commun. 2025. PMID: 40536509 Free PMC article.
Frequency of consumption of coffee, tea, vegetables (broccoli, spinach/collard greens), legumes, nuts, modest alcohol, white meat, rice/pasta, dairy, and intakes of specific nutrients including nitrate/vitamin K, caffeine, betaine, amino acids, and beta carotene were assoc …
Frequency of consumption of coffee, tea, vegetables (broccoli, spinach/collard greens), legumes, nuts, modest alcohol, white meat, ri …
Photoinhibition affects the non-heme iron center in photosystem II.
Gleiter HM, Nugent JH, Haag E, Renger G. Gleiter HM, et al. FEBS Lett. 1992 Nov 16;313(1):75-9. doi: 10.1016/0014-5793(92)81188-r. FEBS Lett. 1992. PMID: 1330698
The half-life of this effect is independent of the absence or presence of an exogenous electron acceptor during the photoinhibitory treatment; (b) in samples photoinhibited in the absence of an electron acceptor and subsequently incubated with K3[Fe(CN)6] in the dark, the extent …
The half-life of this effect is independent of the absence or presence of an exogenous electron acceptor during the photoinhibitory treatmen …
ATR-FTIR Spectroelectrochemical Study on the Mechanism of the pH Dependence of the Redox Potential of the Non-Heme Iron in Photosystem II.
Kato Y, Watanabe H, Noguchi T. Kato Y, et al. Biochemistry. 2021 Jul 13;60(27):2170-2178. doi: 10.1021/acs.biochem.1c00341. Epub 2021 Jun 28. Biochemistry. 2021. PMID: 34181388
The non-heme iron that bridges the two plastoquinone electron acceptors, Q(A) and Q(B), in photosystem II (PSII) is known to have a redox potential (E(m)) of +400 mV with a pH dependence of -60 mV/pH. ...It is thus concluded that the deprotonation/protonati …
The non-heme iron that bridges the two plastoquinone electron acceptors, Q(A) and Q(B), in photosystem II (PSII) is kno …
Bicarbonate binding to the non-heme iron of photosystem II investigated by Fourier transform infrared difference spectroscopy and 13C-labeled bicarbonate.
Hienerwadel R, Berthomieu C. Hienerwadel R, et al. Biochemistry. 1995 Dec 19;34(50):16288-97. doi: 10.1021/bi00050a008. Biochemistry. 1995. PMID: 8845353
The binding site of the non-heme iron of photosystem II (PS II) is investigated by light-induced Fourier tranform infrared (FTIR) difference spectroscopy on Tris-washed membranes. The non-heme iron is oxidized (Fe3+) in the dark with ferr …
The binding site of the non-heme iron of photosystem II (PS II) is investigated by light-induced Fourier tranform infra …
Highly purified D1/D2/cyt b559 preparations from spinach do not contain the non-heme iron center.
Kurreck J, Garbers A, Parak F, Renger G. Kurreck J, et al. FEBS Lett. 1997 Feb 24;403(3):283-6. doi: 10.1016/s0014-5793(97)00071-9. FEBS Lett. 1997. PMID: 9091318
57Fe enriched D1/D2/cyt b559 preparations were isolated from spinach grown hydroponically on a 57Fe containing medium. In terms of polypeptide and pigment composition these samples are of high purity and functional integrity of P680. Mossbauer spectra measured in D1/D2/cyt …
57Fe enriched D1/D2/cyt b559 preparations were isolated from spinach grown hydroponically on a 57Fe containing medium. In terms of po …
Isolation and properties of PS II membrane fragments depleted of the non heme iron center.
Kurreck J, Garbers A, Reifarth F, Andréasson LE, Parak F, Renger G. Kurreck J, et al. FEBS Lett. 1996 Feb 26;381(1-2):53-7. doi: 10.1016/0014-5793(96)00061-0. FEBS Lett. 1996. PMID: 8641439
The functional properties and the content of non heme iron and cytochrome b559 were investigated by measuring flash induced transient changes of the relative fluorescence quantum yield and applying Mossbauer spectroscopy. ...This sample type deprived of virtu …
The functional properties and the content of non heme iron and cytochrome b559 were investigated by measuring flash ind …
Cyanide binding at the non-heme Fe2+ of the iron-quinone complex of photosystem II: at high concentrations, cyanide converts the Fe2+ from high (S = 2) to low (S = 0) spin.
Sanakis Y, Petrouleas V, Diner BA. Sanakis Y, et al. Biochemistry. 1994 Aug 23;33(33):9922-8. doi: 10.1021/bi00199a014. Biochemistry. 1994. PMID: 8061000
The primary electron acceptor complex of photosystem II, QAFe2+, can bind a number of small molecules at the iron site, including cyanide [Koulougliotis, D., Kostopoulos, T., Petrouleas, V., & Diner, B. ...This signal has the characteristics of the semiquinone, QA-, un …
The primary electron acceptor complex of photosystem II, QAFe2+, can bind a number of small molecules at the iron site, including cya …
Iron-sulfur centers as endogenous blue light sensitizers in cells: a study with an artificial non-heme iron protein.
Kim CS, Jung J. Kim CS, et al. Photochem Photobiol. 1992 Jul;56(1):63-8. doi: 10.1111/j.1751-1097.1992.tb09603.x. Photochem Photobiol. 1992. PMID: 1508984
The possible involvement of Fe-S clusters in photodynamic reactions as endogenous sensitizing chromophores in cells has been investigated, by using an artificial non-heme iron protein (ANHIP) derived from bovine serum albumin and ferredoxins isolated from …
The possible involvement of Fe-S clusters in photodynamic reactions as endogenous sensitizing chromophores in cells has been investigated, b …
The semiquinone-iron complex of photosystem II: structural insights from ESR and theoretical simulation; evidence that the native ligand to the non-heme iron is carbonate.
Cox N, Jin L, Jaszewski A, Smith PJ, Krausz E, Rutherford AW, Pace R. Cox N, et al. Biophys J. 2009 Oct 7;97(7):2024-33. doi: 10.1016/j.bpj.2009.06.033. Biophys J. 2009. PMID: 19804734 Free PMC article.
The semiquinone-iron complex of photosystem II was studied using electron spin resonance (ESR) spectroscopy and density functional theory calculations. ...This indicates that 1), the doubly charged carbonate ion is responsible for the g approximately 1.9 form of the semiqu …
The semiquinone-iron complex of photosystem II was studied using electron spin resonance (ESR) spectroscopy and density functional th …
43 results