Journal
TRAFFIC
Volume 8, Issue 12, Pages 1657-1667Publisher
WILEY
DOI: 10.1111/j.1600-0854.2007.00642.x
Keywords
AAA ATPase; Clp proteins; dynein; p97/VCP; pore loop; spastin
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AAA+ adenosine triphosphatases (ATPases) are molecular machines that perform a wide variety of cellular functions. For instance, they can act in vesicle transport, organelle assembly, membrane dynamics and protein unfolding. In most cases, the ATPase domains of these proteins assemble into active ring-shaped hexamers. As AAA+ proteins have a common structure, a central issue is determining how they use conserved mechanistic principles to accomplish specific biological actions. Here, we review the features and motifs that partially define AAA+ domains, describe the cellular activities mediated by selected AAA+ proteins and discuss the recent work, suggesting that various AAA+ machines with very different activities employ a common core mechanism. The importance of this mechanism to human health is demonstrated by the number of genetic diseases caused by mutant AAA+ proteins.
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