Essential elements of radical pair magnetosensitivity in Drosophila
Essential elements of radical pair magnetosensitivity in Drosophila
复制标题
果蝇自由基对磁敏感性的基本要素
DOI:
10.1101/2021.10.29.466426
复制
发表时间:
2021
期刊:
影响因子:
--
通讯作者:
Bradlaugh A
中科院分区:
文献类型:
--
作者:
Bradlaugh A
Many animals use Earth’s magnetic field (also known as the geomagnetic field) for navigation. The favoured mechanism for magnetosensitivity involves a blue-light-activated electron-transfer reaction between flavin adenine dinucleotide (FAD) and a chain of tryptophan residues within the photoreceptor protein CRYPTOCHROME (CRY). The spin-state of the resultant radical pair, and therefore the concentration of CRY in its active state, is influenced by the geomagnetic field. However, the canonical CRY-centric radical-pair mechanism does not explain many physiological and behavioural observations, , , , , –. Here, using electrophysiology and behavioural analyses, we assay magnetic-field responses at the single-neuron and organismal levels. We show that the 52 C-terminal amino acid residues ofDrosophila melanogasterCRY, lacking the canonical FAD-binding domain and tryptophan chain, are sufficient to facilitate magnetoreception. We also show that increasing intracellular FAD potentiates both blue-light-induced and magnetic-field-dependent effects on the activity mediated by the C terminus. High levels of FAD alone are sufficient to cause blue-light neuronal sensitivity and, notably, the potentiation of this response in the co-presence of a magnetic field. These results reveal the essential components of a primary magnetoreceptor in flies, providing strong evidence that non-canonical (that is, non-CRY-dependent) radical pairs can elicit magnetic-field responses in cells.
登录
查看更多内容
影响因子:
3.4
作者:
Ritz, T;Adem, S;Schulten, K
通讯作者:
Schulten, K
影响因子:
15
作者:
Kao, Ya-Ting;Tan, Chuang;Zhong, Dongping
通讯作者:
Zhong, Dongping
影响因子:
25
作者:
Dissel, S;Codd, V;Rosato, E
通讯作者:
Rosato, E
影响因子:
2.8
作者:
M. Murakami;K. Maeda;T. Arai
通讯作者:
T. Arai
影响因子:
3.4
作者:
Solov'yov, Ilia A.;Schulten, Klaus
通讯作者:
Schulten, Klaus