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. 2012 Dec 18;24(12):5074–5088. doi: 10.1105/tpc.112.104422

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© 2012 American Society of Plant Biologists. All rights reserved.

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Figure 6. — Differential Binding of Plant-Specific NLSs to rImpα1a and mImpα.

(A) B54NLS:rImpα1aΔIBB complex. Top: The C-terminal residues of B54NLS (SVL³ in green stick representation) bound to rImpα1aΔIBB (gray cartoon representation, contact residues in gray stick representation). Bottom: Top view of the pocket (in gray surface representation) that accommodates Leu³ from the peptide.

(B) Superposition of the mImpαΔIBB:B54NLS and rImpα1aΔIBB:B54NLS structures. Top: mImpαΔIBB:B54NLS (light blue, cartoon representation, B54NLS omitted) and rImpα1aΔIBB:B54NLS (green, stick representation, rImpα1a omitted) in a view analogous to (A). Leu-3 from the peptide shows steric hindrance with Thr-402 (in magenta stick representation) from mImpαΔIBB. Bottom: Top view of the pocket (in light blue surface representation). Thr-402 is shown in red surface representation.