nicotianamine synthase activity affects nucleolar iron accumulation and impacts rDNA silencing and RNA methylation in Arabidopsis

Autor: C Montacié, C Riondet, L Wei, T Darriere, A Weiss, F Pontvianne, M L Escande, A de Bures, E Jobet, A Barbarossa, M C Carpentier, M G M Aarts, A Attina, C Hirtz, A David, V Marchand, Y Motorin, C Curie, S Mari, J-P Reichheld, J Sáez-Vásquez

Publikováno v: Journal of Experimental Botany.

In plant cells, a large pool of iron (Fe) is contained in the nucleolus, together with that in chloroplasts and mitochondria. A central determinant for intracellular distribution of Fe is nicotianamine (NA) generated by nicotianamine synthase (NAS).

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::bf047ccf31294a8308254a709049b50b
https://doi.org/10.1093/jxb/erad180

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Two active states of the narrow-line gamma-ray-loud AGN GB 1310+487

Autor: Frank K. Schinzel, Y. Ikejiri, S. J. Fegan, Anthony C. S. Readhead, Koji S. Kawabata, K. I. Clubb, Benoit Lott, Masayuki Yamanaka, H. Ungerechts, Filippo D'Ammando, Alexander B. Pushkarev, Kirill Sokolovsky, Pavel Abolmasov, K. Sakimoto, F. Verrecchia, Justin D. Finke, C. C. Cheung, I. Nestoras, Yuri Y. Kovalev, Michitoshi Yoshida, Matthew L. Lister, C. Pittori, S. B. Cenko, R. W. Schmidt, T. Komatsu, Alexei V. Filippenko, Stefan Larsson, Roger W. Romani, Yasuyuki T. Tanaka, Luis Carrasco, D. Riquelme, M. S. Shaw, D. J. Thompson, Emmanouil Angelakis, Walter Max-Moerbeck, S. E. Healey, Elizabeth Hays, Lars Fuhrmann, Joseph L. Richards, J. A. Zensus, S. Vercellone, L. Escande, Mahito Sasada, Makoto Uemura, T. Pursimo, Yu. A. Kovalev, Andrea Bulgarelli, E. Recillas, A. Sievers, Ryosuke Itoh, Thomas P. Krichbaum, Yasushi Fukazawa

Publikováno v: Astronomy and Astrophysics-A&A
Astronomy and Astrophysics-A&A, EDP Sciences, 2014, 565, pp.A26. ⟨10.1051/0004-6361/201220703⟩

Previously unremarkable, the extragalactic radio source GB 1310+487 showed a gamma-ray flare on 2009 November 18, reaching a daily flux of ~10^-6 photons/cm^2/s at energies E>100 MeV and becoming one of the brightest GeV sources for about two weeks.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::47bce9afe233ac39c550fbf194b38601
http://hdl.handle.net/20.500.12278/120670

Multiwavelength Observations of the Gamma-Ray Blazar PKS 0528+134 in Quiescence

Autor: N. I. Palma, M. Böttcher, I. de la Calle, I. Agudo, M. Aller, H. Aller, U. Bach, E. Benítez, C. S. Buemi, L. Escande, J. L. Gómez, M. A. Gurwell, J. Heidt, D. Hiriart, S. G. Jorstad, M. Joshi, A. Lähteenmäki, V. M. Larionov, P. Leto, Y. Li, J. M. López, B. Lott, G. Madejski, A. P. Marscher, D. A. Morozova, C. M. Raiteri, V. Roberts, M. Tornikoski, C. Trigilio, G. Umana, M. Villata, D. Wylezalek

Publikováno v: The Astrophysical Journal
The Astrophysical Journal, American Astronomical Society, 2011, 735, pp.60. ⟨10.1088/0004-637X/735/1/60⟩

We present multiwavelength observations of the ultraluminous blazar-type radio loud quasar PKS 0528+134 in quiescence during the period July to December 2009. Significant flux variability on a time scale of several hours was found in the optical regi

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b252ac244bfa0d57d610eb83aca6090c
http://hal.in2p3.fr/in2p3-00608703

Fermi Gamma-Ray Space Telescope Observations Of Gamma-Ray Outbursts From 3c 454.3 In 2009 December And 2010 April

Autor: Luca Baldini, R. A. Cameron, E. J. Siskind, Krzysztof Nalewajko, S. Carrigan, Johann Cohen-Tanugi, M. S. Strickman, G. A. Caliandro, C. Monte, Denis Bastieri, I. A. Grenier, E. Do Couto E Silva, Lars Fuhrmann, Shiu-Hang Lee, S. Germani, E. Cavazzuti, Dario Gasparrini, A. P. Waite, Gloria Spandre, Tadayuki Takahashi, J. Lande, Sylvain Guiriec, Marco Ajello, P. L. Nolan, N. Gehrels, N. Vilchez, Markus Ackermann, Jun Kataoka, T. L. Usher, J. B. Thayer, A. De Angelis, A. Chekhtman, Igor V. Moskalenko, L. C. Reyes, A. Reimer, Luca Latronico, G. Tosti, Jean Ballet, Claudia Cecchi, A. S. Johnson, S. Cutini, R. Dubois, Jeffrey D. Scargle, Olaf Reimer, D. J. Thompson, S. Corbel, E. Hays, P. Spinelli, Francesco Longo, Stefano Ciprini, Steven Ritz, P. Wang, Elizabeth C. Ferrara, M. Llena Garde, D. J. Suson, A. Makeev, M. Pepe, S. Buson, L. Escande, Joachim Ripken, B. Berenji, Seth Digel, Omer Celik, Francesco Giordano, M. E. Monzani, T. Ohsugi, T. A. Porter, S. Murgia, B. Lott, Keith Bechtol, Nicola Omodei, C. Favuzzi, Emanuele Bonamente, Melissa Pesce-Rollins, G. Godfrey, R. Claus, Jürgen Knödlseder, W. N. Johnson, M. Sikora, A. Tramacere, Hiromitsu Takahashi, F. Piron, G. M. Madejski, Zhenwei Yang, A. Sander, S. Rainò, Takaaki Tanaka, Hartmut Sadrozinski, Ann E. Wehrle, Carmelo Sgrò, Riccardo Rando, Tsunefumi Mizuno, J. P. Norris, F. de Palma, M. Naumann-Godo, A. Morselli, V. Vitale, E. Nuss, Nicola Giglietto, V. Pelassa, E. Orlando, M. Kuss, Ronaldo Bellazzini, Nicola Marchili, F. Gargano, Jonathan F. Ormes, T. Ylinen, J. Bregeon, Yasuyuki T. Tanaka, Akira Okumura, J. E. Grove, Julie McEnery, L. Tibaldo, Gudlaugur Johannesson, Yasushi Fukazawa, B. Giebels, James Chiang, P. A. Caraveo, Persis S. Drell, M. Roth, T. Glanzman, J. G. Thayer, M. Razzano, Roger Blandford, Justin Vandenbroucke, Guido Barbiellini, Filippo D'Ammando, P. Fusco, Charles D. Dermer, Brian L Winer, T. Kamae, D. Dumora, J. Mehault, Takeshi Nakamori, J. M. Casandjian, S. J. Fegan, M. Brigida, P. Lubrano, F. Loparco, Paolo Giommi, M. Hayashida, S. Larsson, Pascal Bruel, R. Buehler, M. N. Mazziotta, T. H. Burnett, M. Ziegler, C. C. Cheung, A. W. Borgland, Peter F. Michelson, Marcello Giroletti, Hideaki Katagiri, D. Hadasch, Diego F. Torres, David Sánchez

Publikováno v: The Astrophysical Journal
The Astrophysical Journal, American Astronomical Society, 2010, 721, pp.1383-1396. ⟨10.1088/0004-637X/721/2/1383⟩
The Astrophysical Journal, 2010, 721, pp.1383-1396. ⟨10.1088/0004-637X/721/2/1383⟩

The flat spectrum radio quasar 3C 454.3 underwent an extraordinary outburst in 2009 December when it became the brightest gamma-ray source in the sky for over 1 week. Its daily flux measured with the Fermi-Large Area Telescope at photon energiesE > 1

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0626ce9abea1e85672ecdf3eff857539
https://hdl.handle.net/11368/2338166