Photocrosslinking-induced CRAC channel-like Orai1 activation independent of STIM1.
Photocrosslinking-induced CRAC channel-like Orai1 activation independent of STIM1.
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DOI:
10.1038/s41467-023-36458-4
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发表时间:
2023-03-08
影响因子:
16.6
通讯作者:
Derler, Isabella
中科院分区:
文献类型:
--
作者:
Maltan, Lena;Weiss, Sarah;Najjar, Hadil;Leopold, Melanie;Lindinger, Sonja;Hoeglinger, Carmen;Hoebarth, Lorenz;Sallinger, Matthias;Grabmayr, Herwig;Berlansky, Sascha;Krivic, Denis;Hopl, Valentina;Blaimschein, Anna;Fahrner, Marc;Frischauf, Irene;Tiffner, Adela;Derler, Isabella
Ca2+ release-activated Ca2+ (CRAC) channels, indispensable for the immune system and various other human body functions, consist of two transmembrane (TM) proteins, the Ca2+-sensor STIM1 in the ER membrane and the Ca2+ ion channel Orai1 in the plasma membrane. Here we employ genetic code expansion in mammalian cell lines to incorporate the photocrosslinking unnatural amino acids (UAA), p-benzoyl-L-phenylalanine (Bpa) and p-azido-L-phenylalanine (Azi), into the Orai1 TM domains at different sites. Characterization of the respective UAA-containing Orai1 mutants using Ca2+ imaging and electrophysiology reveal that exposure to UV light triggers a range of effects depending on the UAA and its site of incorporation. In particular, photoactivation at A137 using Bpa in Orai1 activates Ca2+ currents that best match the biophysical properties of CRAC channels and are capable of triggering downstream signaling pathways such as nuclear factor of activated T-cells (NFAT) translocation into the nucleus without the need for the physiological activator STIM1. The Ca2+ ion channel Orai1 is crucial in immune cells. Here, the authors applied genetic code expansion to transfer light-sensitivity to the Orai1 channel and achieved precise control over its function.
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影响因子:
5.2
作者:
Tiffner A;Hopl V;Schober R;Sallinger M;Grabmayr H;Höglinger C;Fahrner M;Lunz V;Maltan L;Frischauf I;Krivic D;Bhardwaj R;Schindl R;Hediger MA;Derler I
通讯作者:
Derler I
DOI:
10.1126/science.1228757
发表时间:
2012-12-07
期刊:
Science (New York, N.Y.)
影响因子:
--
作者:
Hou X;Pedi L;Diver MM;Long SB
通讯作者:
Long SB
影响因子:
7.8
作者:
Courtney T;Deiters A
通讯作者:
Deiters A
影响因子:
5.5
作者:
Derler, Isabella;Hofbauer, Michael;Romanin, Christoph
通讯作者:
Romanin, Christoph
影响因子:
3.9
作者:
Boehm, Johann;Bulla, Monica;Laporte, Jocelyn
通讯作者:
Laporte, Jocelyn