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. Author manuscript; available in PMC: 2021 Jul 24.
Published in final edited form as: J Mol Biol. 2020 Jun 17;432(16):4623–4636. doi: 10.1016/j.jmb.2020.06.013

Figure 1. Crystal structure of sRI (PDB = 6PSH).

Figure 1

A Ribbon diagram of tetramer observed in the crystal of the free sRI, colored by subunit: blue - subunit A, cyan - subunit B, gray - subunit C, and light green - subunit D. H1–3 helices are marked for the subunit A in corresponding color.

The domain swapped conformation of RI when bound to sT is illustrated in the overlay of sT-bound sRI (magenta) with subunit A of free sRI, H1 −3 helices are labeled for this form in magenta.

B Two views of the surface representation of the sRI tetramer, colored by subunit same as on the panel A illustrate extensive contacts among subunits.