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Figure 2.
Figure 2. (a) Crystal structure of the head-to-head dimer of
YtvA-LOV in its ground (dark) state. The FMN cofactors are
highlighted in stick representation and the secondary structure
elements (blue and light brown) are labeled. Within the crystal,
the two C-terminal Jα helices form intermolecular contacts with
the corresponding Jα' helices of symmetry-related molecules
(white). For clarity, only the Jα helices of symmetry-related
molecules are shown. (b) The dimer interface. Hydrophobic
residues V25, V27, I29, Y41, M111, I113, Y118, V120, and I122
located on the outside of the β-sheet in strands Aβ, Bβ, Hβ
and Iβ form intermolecular contacts between the two monomers.
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