Search results for: Reinat Nevo

Items from 1 to 14 out of 14 results

article

Structural and functional characterisation of the cyanobacterial PetC3 Rieske protein family

Sebastian Veit, Kazuki Takeda, Yuichi Tsunoyama, Frauke Baymann, more

Biochimica et Biophysica Acta (BBA) - Bioenergetics > 2016 > 1857 > 12 > 1879-1891

The cyanobacterium Synechocystis PCC 6803 possesses three Rieske isoforms: PetC1, PetC2 and PetC3. While PetC1 and PetC2 have been identified as alternative subunits of the cytochrome b₆f complex (b₆f), PetC3 was localized exclusively within the plasma membrane. The spatial separation of PetC3 from the photosynthetic and respiratory protein complexes raises doubt in its involvement in bioenergetic...

chapter

Architecture of Thylakoid Membrane Networks

Reinat Nevo, Silvia G. Chuartzman, Onie Tsabari, Ziv Reich, more

Advances in Photosynthesis and Respiration > Lipids in Photosynthesis > 295-328

Summary The primary events of oxygenic photosynthesis are carried out within intricate membrane lamellar systems called thylakoid networks. These networks, which are present in cyanobacteria, algae, and higher plants, accommodate all of the molecular complexes necessary for the light-driven reactions of photosynthesis and provide a medium for energy transduction. Here, we describe the ultrastructure...

chapter

Probing the Energy Landscape of Protein-Binding Reactions by Dynamic Force Spectroscopy

Andreas Ebner, Reinat Nevo, Christian Ranki, Johannes Preiner, more

Handbook of Single-Molecule Biophysics > 407-447

This chapter describes how the energy landscape that underlies protein-binding reactions can be revealed using dynamic force spectroscopy. The chapter begins with a detailed description of methodologies used and requirements of the experimental system, including tip and surface materials and their functionalization strategies. The next few sections discuss the fundamentals of measuring forces using...

article

An easily reversible structural change underlies mechanisms enabling desert crust cyanobacteria to survive desiccation

Leeat Bar-Eyal, Ido Eisenberg, Adam Faust, Hagai Raanan, more

Biochimica et Biophysica Acta (BBA) - Bioenergetics > 2015 > 1847 > 10 > 1267-1273

Biological desert sand crusts are the foundation of desert ecosystems, stabilizing the sands and allowing colonization by higher order organisms. The first colonizers of the desert sands are cyanobacteria. Facing the harsh conditions of the desert, these organisms must withstand frequent desiccation–hydration cycles, combined with high light intensities. Here, we characterize structural and functional...

article

Differential effects of ambient or diminished CO₂ and O₂ levels on thylakoid membrane structure in light‐stressed plants

Onie Tsabari, Reinat Nevo, Sagit Meir, L. Ruby Carrillo, more

The Plant Journal > 81 > 6 > 884 - 894

Over‐reduction of the photosynthetic electron transport chain may severely damage the photosynthetic apparatus as well as other constituents of the chloroplast and the cell. Here, we exposed Arabidopsis leaves to saturating light either under normal atmospheric conditions or under CO₂‐ and O₂‐limiting conditions, which greatly increase excitation and electron pressures by draining terminal electron...

article

The architecture of Rhodobacter sphaeroides chromatophores

Simon Scheuring, Reinat Nevo, Lu-Ning Liu, Stéphanie Mangenot, more

BBA - Bioenergetics > 2014 > 1837 > 8 > 1263-1270

The chromatophores of Rhodobacter (Rb.) sphaeroides represent a minimal bio-energetic system, which efficiently converts light energy into usable chemical energy. Despite extensive studies, several issues pertaining to the morphology and molecular architecture of this elemental energy conversion system remain controversial or unknown. To tackle these issues, we combined electron microscope tomography,...

article

Preface for dynamic and ultrastructure of bioenergetic membranes and their components

Giorgio Lenaz, Reinat Nevo, Ziv Reich

BBA - Bioenergetics > 2014 > 1837 > 4 > 407

article

Importin 7 and Exportin 1 Link c-Myc and p53 to Regulation of Ribosomal Biogenesis

Lior Golomb, Debora Rosa Bublik, Sylvia Wilder, Reinat Nevo, more

Molecular Cell > 2012 > 47 > 1 > 150

article

Composition, architecture and dynamics of the photosynthetic apparatus in higher plants

Reinat Nevo, Dana Charuvi, Onie Tsabari, Ziv Reich

The Plant Journal > 70 > 1 > 157 - 176

The process of oxygenic photosynthesis enabled and still sustains aerobic life on Earth. The most elaborate form of the apparatus that carries out the primary steps of this vital process is the one present in higher plants. Here, we review the overall composition and supramolecular organization of this apparatus, as well as the complex architecture of the lamellar system within which it is harbored...

article

Structural and functional alterations of cyanobacterial phycobilisomes induced by high-light stress

Eyal Tamary, Vladimir Kiss, Reinat Nevo, Zach Adam, more

BBA - Bioenergetics > 2012 > 1817 > 2 > 319-327

Exposure of cyanobacterial or red algal cells to high light has been proposed to lead to excitonic decoupling of the phycobilisome antennae (PBSs) from the reaction centers. Here we show that excitonic decoupling of PBSs of Synechocystis sp. PCC 6803 is induced by strong light at wavelengths that excite either phycobilin or chlorophyll pigments. We further show that decoupling is generally followed...

article

Importin 7 and Exportin 1 Link c-Myc and p53 to Regulation of Ribosomal Biogenesis

Lior Golomb, Debora Rosa Bublik, Sylvia Wilder, Reinat Nevo, more

Molecular Cell > 2012 > 45 > 2 > 222-232

Members of the β-karyopherin family mediate nuclear import of ribosomal proteins and export of ribosomal subunits, both required for ribosome biogenesis. We report that transcription of the β-karyopherin genes importin 7 (IPO7) and exportin 1 (XPO1), and several additional nuclear import receptors, is regulated positively by c-Myc and negatively by p53. Partial IPO7 depletion triggers p53 activation...

article

Mechanical Unfolding of Acylphosphatase Studied by Single-Molecule Force Spectroscopy and MD Simulations

Gali Arad-Haase, Silvia G. Chuartzman, Shlomi Dagan, Reinat Nevo, more

Biophysical Journal > 2010 > 99 > 1 > 238-247

Single-molecule manipulation methods provide a powerful means to study protein transitions. Here we combined single-molecule force spectroscopy and steered molecular-dynamics simulations to study the mechanical properties and unfolding behavior of the small enzyme acylphosphatase (AcP). We find that mechanical unfolding of AcP occurs at relatively low forces in an all-or-none fashion and is decelerated...

article

Direct Discrimination between Models of Protein Activation by Single-Molecule Force Measurements

Reinat Nevo, Vlad Brumfeld, Michael Elbaum, Peter Hinterdorfer, more

Biophysical Journal > 2004 > 87 > 4 > 2630-2634

The limitations imposed on the analyses of complex chemical and biological systems by ensemble averaging can be overcome by single-molecule experiments. Here, we used a single-molecule technique to discriminate between two generally accepted mechanisms of a key biological process—the activation of proteins by molecular effectors. The two mechanisms, namely induced-fit and population-shift, are normally...

article

Scanning force microscopy in the applied biological sciences

Ziv Reich, Ruti Kapon, Reinat Nevo, Yair Pilpel, more

Biotechnology Advances > 2001 > 19 > 6 > 451-485

Fifteen years after its invention, the scanning force microscope (SFM) is rooted deep in the biological sciences. Here we discuss the use of SFM in biotechnology and biomedical research. The spectrum of applications reviewed includes imaging, force spectroscopy and mapping, as well as sensor applications. It is our hope that this review will be useful for researchers considering the use of SFM in...

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