+ Site Statistics
References:
52,654,530
Abstracts:
29,560,856
PMIDs:
28,072,755
+ Search Articles
+ Subscribe to Site Feeds
Most Shared
PDF Full Text
+ PDF Full Text
Request PDF Full Text
+ Follow Us
Follow on Facebook
Follow on Twitter
Follow on LinkedIn

+ Translate
+ Recently Requested

On the structure of the manganese complex of photosystem II: extended-range EXAFS data and specific atomic-resolution models for four S-states



On the structure of the manganese complex of photosystem II: extended-range EXAFS data and specific atomic-resolution models for four S-states



Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences 363(1494): 1237-43; Discussion 1243-4



The water-oxidizing manganese complex bound to the proteins of photosystem II (PSII) was studied by X-ray absorption spectroscopy on PSII membrane particles. An extended range for collection of extended X-ray absorption fine-structure (EXAFS) data was used (up to 16.6A(-1)). The EXAFS suggests the presence of two Mn-Mn distances close to 2.7A (per Mn4Ca complex); the existence of a third Mn-Mn distance below 2.9A is at least uncertain. Interestingly, a distance of 3.7A is clearly resolved in the extended-range data and tentatively assigned to a Mn-Mn distance. Taking into account the above EXAFS results (inter alia), we present a model for the structure of the PSII manganese complex, which differs from previous atomic-resolution models. Emphasizing the hypothetical character, we propose for all semi-stable S-states: (i) a structure of the Mn4Ca(mu-O)n core, (ii) a model of the amino acid environment, and (iii) assignments of distinct Mn oxidation states to all the individual Mn ions. This specific working model may permit discussion, verification and invalidation of its various features in comparison with experimental and theoretical findings.

(PDF emailed within 0-6 h: $19.90)

Accession: 021491675

Download citation: RISBibTeXText

PMID: 17989002

DOI: 10.1098/rstb.2007.2220


Related references

On the structure of the manganese complex of photosystem II: extended range EXAFS data and specific atomic-resolution models for four S-states - Discussion. 2008

Revealing How Nature Uses Sunlight to Split Water || On the Structure of the Manganese Complex of Photosystem II: Extended-Range EXAFS Data and Specific Atomic-Resolution Models for Four S-States. Philosophical Transactions Biological Sciences 363(1494): 1237-1244, 2008

Atomic-resolution models of the photosystem-II manganese complex in the S1, S2, and S3 redox states based on X-ray absorption linear dichroism data. Photosynthesis Research 69(1-3): 99, 2001

The state of manganese in the photosynthetic apparatus. 4. Structure of the manganese complex in Photosystem II studied using EXAFS spectroscopy. The S1 state of the O2-evolving Photosystem II complex from spinach. Biochimica et biophysica acta, 850(2): 324-332, 1986

The O 2 -Evolving Complex of Photosystem II: Recent Insights from Quantum Mechanics/Molecular Mechanics (QM/MM), Extended X-ray Absorption Fine Structure (EXAFS), and Femtosecond X-ray Crystallography Data. Accounts of Chemical Research 50(1): 41-48, 2016

An exafs study of the manganese oxygen evolving complex in purified photosystem ii membrane fractions the s 1 and s 2 states. Biochemical Journal 285(2): 569-576, 1992

Chemical analysis at atomic resolution of isolated extended defects in an oxygen-deficient, complex manganese perovskite. Chemistry 20(5): 1237-1241, 2014

Analysis of experimental extended x-ray-absorption fine-structure (EXAFS) data using calculated curved-wave, multiple-scattering EXAFS spectra. Physical Review. B, Condensed Matter 42(17): 10843-10851, 1990

The S3 state of photosystem II: differences between the structure of the manganese complex in the S2 and S3 states determined by X-ray absorption spectroscopy. Biochemistry 29(2): 471-485, 1990

The S0 state of photosystem II induced by hydroxylamine: differences between the structure of the manganese complex in the S0 and S1 states determined by X-ray absorption spectroscopy. Biochemistry 29(2): 486-496, 1990

High-resolution Mn EXAFS of the oxygen-evolving complex in photosystem II: structural implications for the Mn4Ca cluster. Journal of the American Chemical Society 127(43): 14974-5, 2005

NMR paramagnetic relaxation enhancements due to manganese in the S0 and S 2 states of Photosystem II-enriched membrane fragments and in the detergent-solubilized Photosystem II complex. Photosynthesis Research 38(3): 347-354, 1993

Photosystem II: Molecular Structure and Function || Structure of the Manganese Complex in Photosystem II: Insights from X-ray Spectroscopy. Philosophical Transactions Biological Sciences 357(1426): 1347-1358, 2002

Structure of the oxygen evolving complex of photosystem ii calcium and lanthanum compete for sites on the oxidizing side of photosystem ii which control the binding of water soluble polypeptides and regulate the activity of the manganese complex. Biochimica et Biophysica Acta 809(2): 173-180, 1985

Analysis of the radiation-damage-free X-ray structure of photosystem II in light of EXAFS and QM/MM data. Biochemistry 54(9): 1713-1716, 2015