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Figure 3.
Figure 3. Subunit Structure and Contacts(A) Schematic
drawing of the secondary structural elements of a thermosome α
subunit. Helices and strands are labeled and colored as in
Figure 2. With respect to Figure 1A the view corresponds to a
90° rotation around the pseudo 8-fold axis.(B) Intra-ring
contacts between two thermosome subunits as viewed from the
inside of the particle. The α and β monomers are color coded
as in Figure 1A, and the bound nucleotides are shown in
yellow.(C) Inter-ring contacts between two thermosome α
subunits related by 2-fold symmetry.(D) GroEL inter-ring
contacts. One subunit in the upper ring is related to two
subunits in the lower ring by 2-fold axes at the right and left
edge of the upper subunit.
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