Cyclic Ion Mobility-Collision Activation Experiments Elucidate Protein Behavior in the Gas Phase.
Cyclic Ion Mobility-Collision Activation Experiments Elucidate Protein Behavior in the Gas Phase.
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环状离子迁移率激活实验阐明了气相中的蛋白质行为。
DOI:
10.1021/jasms.1c00018
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发表时间:
2021-06-02
影响因子:
3.2
通讯作者:
Thalassinos K
中科院分区:
文献类型:
--
作者:
Eldrid C;Ben-Younis A;Ujma J;Britt H;Cragnolini T;Kalfas S;Cooper-Shepherd D;Tomczyk N;Giles K;Morris M;Akter R;Raleigh D;Thalassinos K
Ion mobility coupled to mass spectrometry (IM-MS) is widely used to study protein dynamics and structure in the gas phase. Increasing the energy with which the protein ions are introduced to the IM cell can induce them to unfold, providing information on the comparative energetics of unfolding between different proteoforms. Recently, a high-resolution cyclic IM-mass spectrometer (cIM-MS) was introduced, allowing multiple, consecutive tandem IM experiments (IMn) to be carried out. We describe a tandem IM technique for defining detailed protein unfolding pathways and the dynamics of disordered proteins. The method involves multiple rounds of IM separation and collision activation (CA): IM-CA-IM and CA-IM-CA-IM. Here, we explore its application to studies of a model protein, cytochrome C, and dimeric human islet amyloid polypeptide (hIAPP), a cytotoxic and amyloidogenic peptide involved in type II diabetes. In agreement with prior work using single stage IM-MS, several unfolding events are observed for cytochrome C. IMn-MS experiments also show evidence of interconversion between compact and extended structures. IMn-MS data for hIAPP shows interconversion prior to dissociation, suggesting that the certain conformations have low energy barriers between them and transition between compact and extended forms.
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影响因子:
3.9
作者:
Eldrid C;Thalassinos K
通讯作者:
Thalassinos K
影响因子:
15
作者:
Dupuis NF;Wu C;Shea JE;Bowers MT
通讯作者:
Bowers MT
影响因子:
2.9
作者:
Luca, Sorin;Yau, Wai-Ming;Tycko, Robert
通讯作者:
Tycko, Robert
影响因子:
5.2
作者:
Marek, Peter;Woys, Ann Marie;Sutton, Kelvin;Zanni, Martin T.;Raleigh, Daniel P.
通讯作者:
Raleigh, Daniel P.
DOI:
10.1073/pnas.84.23.8628
发表时间:
1987-12-01
影响因子:
11.1
作者:
COOPER, GJS;WILLIS, AC;REID, KBM
通讯作者:
REID, KBM