The page prioritizes protein identity, the current assembly, associated components, oligomeric state and cross-PDB links.
Chain mapping and sequence ranges are retained as data evidence. Internal IDs, import timestamps and assembly operation expressions are maintenance fields and are not shown here.
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2. Structure Basics 2. Structure Basics
Entry ID entry_id
1kff
Deposition date deposition_date
2001-11-20
Structure title title
An engineered streptavidin with improved affinity for the strep-tag II peptide: apo-SAM1
Keywords keywords
biotin, protein engineering, strep-tag, streptavidin, PEPTIDE BINDING PROTEIN; PEPTIDE BINDING PROTEIN
Experimental Method method
X-RAY DIFFRACTION
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3. Official assembly/model SAXS Official SAXS Profiles
This page reads only the latest assembly calculations. Every curve maps to an explicit PDB entry, official biological assembly and coordinate model.
1kff__assembly_1__model_1
Assembly 1 · Model 1 · CRYSOL 4.1.3-1-20251215 (887e7ef)
;Improved affinity of engineered streptavidin for the Strep-tag II peptide is due to a fixed open conformation of the lid-like loop at the binding site.
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