An arginine tetrad as mediator of input-dependent and input-independent ATPases in the clock protein KaiC

Pattanayek, R.; Xu, Y.; Lamichhane, A.; Johnson, C.H.; Egli, M.

doi:10.1107/S1399004714003228

Acta Crystallographica Section D
Acta Crystallographica
Section D STRUCTURAL BIOLOGY

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Figure 8
Similarities between KaiC crystal-packing interactions and KaiC–KaiB binding. Packing interactions between the KaiCII ring and a KaiCI subunit from a symmetry-related KaiC hexamer (KaiC^#) in the crystal structures of (a) T. elongatus KaiC and (b) S. elongatus KaiC. (c) The KaiCII–KaiB interaction (only a single KaiB is depicted) in the cryo-EM model of the S. elongatus KaiC₆B₆ complex. (d, e) The KaiCII–KaiCI^# crystal-packing interactions shown in (b) and (c), respectively, rotated by 90° around the horizontal axis and viewed from the side. (f) Superimposition of the latch regions in T. elongatus KaiCI (residues 110–124) and CII (residues 350–356) and the adjacent α-helical and β-stranded portions.

STRUCTURAL
BIOLOGY

ISSN: 2059-7983

Volume 70| Part 5| May 2014| Pages 1375-1390

https://doi.org/10.1107/S1399004714003228

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