Studying GGDEF Domain in the Act: Minimize Conformational Frustration to Prevent Artefacts.
Studying GGDEF Domain in the Act: Minimize Conformational Frustration to Prevent Artefacts.
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DOI:
10.3390/life11010031
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发表时间:
2021-01-06
期刊:
影响因子:
--
通讯作者:
Rinaldo S
中科院分区:
文献类型:
--
作者:
Mantoni F;Scribani Rossi C;Paiardini A;Di Matteo A;Cappellacci L;Petrelli R;Ricciutelli M;Paone A;Cutruzzolà F;Giardina G;Rinaldo S
GGDEF-containing proteins respond to different environmental cues to finely modulate cyclic diguanylate (c-di-GMP) levels in time and space, making the allosteric control a distinctive trait of the corresponding proteins. The diguanylate cyclase mechanism is emblematic of this control: two GGDEF domains, each binding one GTP molecule, must dimerize to enter catalysis and yield c-di-GMP. The need for dimerization makes the GGDEF domain an ideal conformational switch in multidomain proteins. A re-evaluation of the kinetic profile of previously characterized GGDEF domains indicated that they are also able to convert GTP to GMP: this unexpected reactivity occurs when conformational issues hamper the cyclase activity. These results create new questions regarding the characterization and engineering of these proteins for in solution or structural studies.
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