scholarly journals Isothermal Titration Calorimetry: Thermodynamic Analysis of the Binding Thermograms of Molecular Recognition Events by Using Equilibrium Models

Author(s):  
Jose C. ◽  
Javier Murciano-Calles ◽  
Eva S. ◽  
Manuel Iglesias-Bexiga ◽  
Irene Luque ◽  
...  

2003 ◽  
Vol 104 (1) ◽  
pp. 67-78 ◽  
Author(s):  
Brian A. Lobo ◽  
Gary S. Koe ◽  
Janet G. Koe ◽  
C.Russell Middaugh






1999 ◽  
Vol 19 (5) ◽  
pp. 411-419 ◽  
Author(s):  
Samiksha Katiyar ◽  
E. J. M. Van Damme ◽  
Willy J. Peumans ◽  
Avadhesha Surolia

UDA (Urtica dioica agglutinin) contains two hevein like domains with two non-identical interacting sites and is specific for chitooligosaccharides. The binding of chitooligosaccharides to UDA was studied by Isothermal Titration Calorimetry. Each site is composed of three subsites, each binding to a sugar residue. Thermodynamic parameters obtained show that while chitobiose has two independent non-interacting sites, chitotriose, chitotetrose and chitopentose have two interacting sites on each monomer of UDA. Values of binding enthalpy (ΔH) increase almost by a factor of 7 in going from chitobiose to chitotriose indicating the existence of three subsites in the combining site of UDA. The binding constant for chitotetrose and chitopentose increase without any further enhancement in the values of ΔH indicating that for oligomers larger than chitotriose interaction is favoured entropically.



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