4I60

Crystal structure of avidin - biotinylruthenocene complex

Summary for 4I60

• Entry DOI: 10.2210/pdb4i60/pdb
• Related: 1AVD 1AVE 1VYO 2AVI
• Descriptor: Avidin, 2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose, [(1,2,3,4,5-eta)-cyclopentadienyl][(1,2,3,4,5-eta)-{5-[(3aS,4S,6aR)-2-oxohexahydro-1H-thieno[3,4-d]imidazol-4-yl]pentanoyl}cyclopentadienyl]ruthenium, ... (4 entities in total)
• Functional Keywords: beta barrel, biotin-binding protein, biotinylruthenocene, glycoprotein, hen egg white
• Biological source: Gallus gallus (Chicken)
• Cellular location: Secreted: P02701
• Total number of polymer chains: 1
• Total formula weight: 15194.97

Authors

Strzelczyk, P.,Bujacz, A.,Bujacz, G. (deposition date: 2012-11-29, release date: 2013-08-14, Last modification date: 2024-11-20)

Primary citation

Strzelczyk, P.,Bujacz, A.,Plazuk, D.,Zakrzewski, J.,Bujacz, G.
Structural investigation of the interactions of biotinylruthenocene with avidin.
Chem.Biol.Interact, 204:6-12, 2013

PubMed Abstract: The crystal structure of avidin, a protein from hen egg white, was determined in the form of a complex with biotinylruthenocene. This biotin-derived organometallic ligand is a potential anticancer agent for targeted therapy based upon avidin-biotin technology. Isothermal titration calorimetry experiments, involving avidin complexes with biotin (vitamin H or B7) derivatives, show differences in their affinity to the protein in comparison to its avidin-biotin complex, the strongest known biochemical interaction in Nature. The crystal structure of the first complex of avidin with biotinylruthenocene, determined at 2.5Å resolution (PDB: 4I60), shows unique interactions of the ruthenocene moiety with avidin. Biotin derivatives exhibit weaker affinity to avidin then biotin, which allows their wider use in biotechnology. The specific properties of biotinylruthenocene and the knowledge of its interactions with avidin may be useful in biochemical, medical, and nanotechnological applications.

PubMed: 23603015
DOI: 10.1016/j.cbi.2013.04.005

Experimental method

X-RAY DIFFRACTION (2.5 Å)