Biological water-oxidizing complex: a nano-sized manganese-calcium oxide in a protein environment.

Biological water-oxidizing complex: a nano-sized manganese-calcium oxide in a protein environment.

Photosynthesis research (2012-09-04)

Mohammad Mahdi Najafpour, Atefeh Nemati Moghaddam, Young Nam Yang, Eva-Mari Aro, Robert Carpentier, Julian J Eaton-Rye, Choon-Hwan Lee, Suleyman I Allakhverdiev

PMID22941557

ABSTRACT

The resolution of Photosystem II (PS II) crystals has been improved using isolated PS II from the thermophilic cyanobacterium Thermosynechococcus vulcanus. The new 1.9 Å resolution data have provided detailed information on the structure of the water-oxidizing complex (Umena et al. Nature 473: 55-61, 2011). The atomic level structure of the manganese-calcium cluster is important for understanding the mechanism of water oxidation and to design an efficient catalyst for water oxidation in artificial photosynthetic systems. Here, we have briefly reviewed our knowledge of the structure and function of the cluster.

MATERIALS

Product Number

Brand

Product Description

463728

Sigma-Aldrich

Manganese, powder, ≥99.9% trace metals basis

266132

Sigma-Aldrich

Manganese, powder, −325 mesh, ≥99% trace metals basis

266167

Sigma-Aldrich

Manganese, chips, thickness <2.0 mm, 99%

GF41418378

Manganese, foil, not light tested, 50x50mm, thickness 0.003mm, permanent polyester support, 98.7%

GF58094635

Manganese, foil, not light tested, 25x25mm, thickness 0.004mm, permanent polyester support, 98.7%

GF33640860

Manganese, foil, not light tested, 50x50mm, thickness 0.004mm, permanent polyester support, 98.7%

GF31519975

Manganese, foil, not light tested, 50x50mm, thickness 0.001mm, permanent polyester support, 98.7%

GF00832081

Manganese, foil, not light tested, 50x50mm, thickness 0.015mm, permanent polyester support, 98.7%

GF05008092

Manganese, foil, not light tested, 25x25mm, thickness 0.005mm, permanent polyester support, 98.7%

GF85367605

Manganese, foil, not light tested, 50x50mm, thickness 0.005mm, permanent polyester support, 98.7%

GF90559794

Manganese, foil, not light tested, 25x25mm, thickness 0.02mm, permanent polyester support, 98.7%

GF03428625

Manganese, foil, not light tested, 25x25mm, thickness 0.05mm, permanent polyester support, 98.7%

GF38495885

Manganese, rod, 50mm, diameter 4.0mm, cast, 99.5%

GF60677646

Manganese, foil, not light tested, 50x50mm, thickness 0.0025mm, permanent polyester support, 98.7%

GF61911288

Manganese, foil, not light tested, 50x50mm, thickness 0.01mm, permanent polyester support, 98.7%

GF42039918

Manganese, rod, 50mm, diameter 6.35mm, cast, 99.5%

GF87355334

Manganese, foil, 50x50mm, thickness 2mm, hot-pressed, 99.95%

GF94542206

Manganese, foil, not light tested, 25x25mm, thickness 0.0125mm, permanent polyester support, 98.7%

GF53022833

Manganese, foil, not light tested, 50x50mm, thickness 0.007mm, permanent polyester support, 98.7%

GF70110593

Manganese, foil, not light tested, 25x25mm, thickness 0.006mm, permanent polyester support, 98.7%

GF71274258

Manganese, foil, not light tested, 50x50mm, thickness 0.008mm, permanent polyester support, 98.7%

GF40287258

Manganese, foil, not light tested, 25x25mm, thickness 0.002mm, permanent polyester support, 98.7%

GF83932768

Manganese, foil, 25x25mm, thickness 2mm, hot-pressed, 99.95%

GF11021094

Manganese, rod, 10mm, diameter 4.0mm, cast, 99.5%

GF94645233

Manganese, foil, not light tested, 50x50mm, thickness 0.025mm, permanent polyester support, 98.7%

GF28884549

Manganese, foil, not light tested, 25x25mm, thickness 0.0025mm, permanent polyester support, 98.7%

GF70055524

Manganese, foil, not light tested, 50x50mm, thickness 0.009mm, permanent polyester support, 98.7%

GF05710430

Manganese, foil, not light tested, 50x50mm, thickness 0.02mm, permanent polyester support, 98.7%

GF53469142

Manganese, foil, not light tested, 25x25mm, thickness 0.008mm, permanent polyester support, 98.7%

GF86610539

Manganese, foil, not light tested, 50x50mm, thickness 0.0125mm, permanent polyester support, 98.7%