structural elements regulating aaa+ protein quality control machines
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ID: 228135
2017
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Abstract
Members of the ATPases Associated with various cellular Activities (AAA+) superfamily participate in essential and diverse cellular pathways in all kingdoms of life by harnessing the energy of ATP binding and hydrolysis to drive their biological functions. Although most AAA+ proteins share a ring-shaped architecture, AAA+ proteins have evolved distinct structural elements that are fine-tuned to their specific functions. A central question in the field is how ATP binding and hydrolysis are coupled to substrate translocation through the central channel of ring-forming AAA+ proteins. In this mini-review, we will discuss structural elements present in AAA+ proteins involved in protein quality control, drawing similarities to their known role in substrate interaction by AAA+ proteins involved in DNA translocation. Elements to be discussed include the pore loop-1, the Inter-Subunit Signaling (ISS) motif, and the Pre-Sensor I insert (PS-I) motif. Lastly, we will summarize our current understanding on the inter-relationship of those structural elements and propose a model how ATP binding and hydrolysis might be coupled to polypeptide translocation in protein quality control machines.
| Reference Key |
chang2017frontiersstructural
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|---|---|
| Authors | ;Chiung-Wen Chang;Sukyeong Lee;Francis T. F. Tsai;Francis T. F. Tsai |
| Journal | biopsychosocial medicine |
| Year | 2017 |
| DOI |
10.3389/fmolb.2017.00027
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| URL | |
| Keywords | Keywords not found |
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