نتایج جستجو برای: PSBQ adaptation

تعداد نتایج: 145017  

Journal: Evidence Based Care 2018

Background: Beliefs of women play a very important role in efficacy of screening for cervical cancer. Therefore, it is necessary to investigate their points of view using appropriate tools with suitable validity and reliability. It seems that the Pap Smear Belief Questionnaire (PSBQ) can assess the attitudes and beliefs of women towards screening for Pap smear. Aim: This study aimed to evaluate...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2007
Johnna L Roose Yasuhiro Kashino Himadri B Pakrasi

Light-induced conversion of water to molecular oxygen by Photosystem II (PSII) is one of the most important enzymatic reactions in the biosphere. PSII is a multisubunit membrane protein complex with numerous associated cofactors, but it continually undergoes assembly and disassembly due to frequent light-mediated damage as a result of its normal function. Thus, at any instant, there is heteroge...

Journal: :The Plant cell 2004
Leeann E Thornton Hiroshi Ohkawa Johnna L Roose Yasuhiro Kashino Nir Keren Himadri B Pakrasi

The mechanism of oxygen evolution by photosystem II (PSII) has remained highly conserved during the course of evolution from ancestral cyanobacteria to green plants. A cluster of manganese, calcium, and chloride ions, whose binding environment is optimized by PSII extrinsic proteins, catalyzes this water-splitting reaction. The accepted view is that in plants and green algae, the three extrinsi...

Journal: :Plant physiology 2005
Kentaro Ifuku Yumiko Yamamoto Taka-Aki Ono Seiko Ishihara Fumihiko Sato

PsbP and PsbQ proteins are extrinsic subunits of photosystem II (PSII) and participate in the normal function of photosynthetic water oxidation. Both proteins exist in a broad range of the oxygenic photosynthetic organisms; however, their physiological roles in vivo have not been well defined in higher plants. In this study, we established and analyzed transgenic tobacco (Nicotiana tabacum) pla...

Journal: :Photochemical & photobiological sciences : Official journal of the European Photochemistry Association and the European Society for Photobiology 2005
Javier De Las Rivas Angel Roman

PsbO, PsbP and PsbQ are the extrinsic proteins associated with the oxygen-evolving (OE) engine of all known higher plants. However their presence is not constant throughout all known oxy-photosynthetic organisms. For this reason, comparative analyses of the sequence and the structure of these proteins in different species from prokaryotes to eukaryotes may allow unravelling of the evolutionary ...

Journal: :European journal of biochemistry 2003
Mónica Balsera Juan B Arellano Florencio Pazos Damien Devos Alfonso Valencia Javier De Las Rivas

We examined the microenvironment of the single tryptophan and the tyrosine residues of PsbQ, one of the three main extrinsic proteins of green algal and higher plant photosystem II. On the basis of this information and the previous data on secondary structure [Balsera, M., Arellano, J.B., Gutiérrez, J.R., Heredia, P., Revuelta, J.L. & De Las Rivas, J. (2003) Biochemistry42, 1000-1007], we scree...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2014
Manjula P Mummadisetti Laurie K Frankel Henry D Bellamy Larry Sallans Jost S Goettert Michal Brylinski Patrick A Limbach Terry M Bricker

Protein cross-linking and radiolytic footprinting coupled with high-resolution mass spectrometry were used to examine the structure of PsbP and PsbQ when they are bound to Photosystem II. In its bound state, the N-terminal 15-amino-acid residue domain of PsbP, which is unresolved in current crystal structures, interacts with domains in the C terminus of the protein. These interactions may serve...

Journal: :Annals of botany 2009
Cristina Pagliano Nicoletta La Rocca Flora Andreucci Zsuzsanna Deák Imre Vass Nicoletta Rascio Roberto Barbato

BACKGROUND AND AIMS Photosystem II of oxygenic organisms is a multi-subunit protein complex made up of at least 20 subunits and requires Ca(2+) and Cl(-) as essential co-factors. While most subunits form the catalytic core responsible for water oxidation, PsbO, PsbP and PsbQ form an extrinsic domain exposed to the luminal side of the membrane. In vitro studies have shown that these subunits hav...

Journal: :EMBO reports 2003
Vito Calderone Michela Trabucco Andreja Vujicić Roberto Battistutta Giorgio Mario Giacometti Flora Andreucci Roberto Barbato Giuseppe Zanotti

The smallest extrinsic polypeptide of the water-oxidizing complex (PsbQ) was extracted and purified from spinach (Spinacia oleracea) photosystem II (PSII) membranes. It was then crystallized in the presence of Zn(2+) and its structure was determined by X-ray diffraction at 1.95-A resolution using the multi-wavelength anomalous diffraction method, with the zinc as the anomalous scatterer. The cr...

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