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Isothermal titration calorimetry
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Ebook "Protein dimerization and oligomerization in biology" has a strong focus on homo-oligomerization, which is surprisingly common. However, protein function is so often linked to both homo- and hetero-oligomerization and many heterologous interactions likely evolved from homologous interaction, so this volume also covers many aspects of hetero-oligomerization.
184p
ladongphongthanh1008
22-04-2024
4
2
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The effects of pH, ionic strength and polymer ratio in the complexation of chitosan (CHI) with different anionic polysaccharides, namely gum Arabic (GA), sodium alginate (ALG) and κ-carrageenan (CRG), were investigated. This was made using titration techniques, which allowed the determination of stoichiometry and binding constant of complexes.
11p
vihermione
06-01-2023
13
2
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The interaction between small molecules and neutral soluble dietary fiber is one of the proposed mechanisms determining the bioavailability of these components in the small intestine. However, the weak nature of these interactions makes it difficult to find an analytical method sensitive enough to detect them.
11p
viginny
30-12-2022
6
2
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Differential scanning calorimetry was established for in-situ measurement ofthe transition temperatures of antibodies when adsorbed on hydrophobic interaction chromatography media. This method is also suitable for non-transparent media, which is an advantage over spectroscopic methods that cannot be used in many cases due to large background signals.
7p
viginny
23-12-2022
5
3
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In procedure 1, micellisation study by isothermal titration calorimetry (ITC) showed that the increase in Gl + concentration reduces the cmc and the micellisation enthalpy. Increasing of the micellisation entropy was also observed, suggesting desolvation of micellar structures as a consequence of electrostatic attraction with Gl+ ions. In procedure 2, titration of Gl+ with SDS solution at 7.
12p
langthannam
29-12-2021
5
0
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Calix[4]pyrrole derivatives with bulky substituents at their meso-positions were synthesized via mixed condensation of pyrrole with cyclohexanone and acetophenone derivatives. Anion binding studies, carried out by isothermal titration calorimetry in 1,2-dichloroethane with Cl− and CH3CO−2 anions in the form of their tetrabutylammonium salts, revealed that these new calix[4]pyrrole derivatives can bind the aforementioned anions as effectively as the unsubstituted “parent” system, octamethylcalix[4]pyrrole (1).
15p
tudichquannguyet
29-11-2021
2
0
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From studies using different experimental techniques employed to determine the presence of aggregates e.g. isothermal titration calorimetry, surface tension, electrical conductivity, UV–Vis spectrophotometry, dynamic and static light scattering, it is clearly demonstrated that the compound [Cu(4, 4′-dimethyl-2, 2′-bipyridine)(acetylacetonato) H2O]NO3 (Casiopeína III-ia), promising member of a family of new generation compounds for cancer treatment, is able to auto associate in aqueous media.
10p
vijiraiya2711
27-05-2020
7
0
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Guanosine triphosphate nucleotide analogues such as GppNHp (also named GMPPNP) or GTPcS are widely used to stabilize rapidly hydrolyzing protein-nucleotide complexes and to investigate biochemical reaction pathways. Here we describe the chemical synthesis of guanosine 5¢-O-(c-amidotriphosphate) (GTPcNH2) and a new synthesis of guanosine 5¢-O-(c-fluorotriphosphate) (GTPcF). The two nucleotides were characterized using NMR spectroscopy and isothermal titration calorimetry. Chemical shift data on 31P, 19F and 1H NMR resonances are tabulated.
9p
system191
01-06-2013
28
3
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Division of Medicinal and Natural Products Chemistry, Department of Chemistry and Department of Chemical Engineering, University of Iowa, USA; 2Department of Autoimmunology, Statens Serum Institut, Copenhagen, Denmark Synthetic peptides based on amino-acid residues 27–38 of human serum amyloid P component represent a novel type of heparin binders as they do not contain clusters of basic amino acids or other known features associated with protein or peptide heparin binding.
8p
system191
01-06-2013
52
3
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Observations of thioredoxin inhibition by cadmium and of a positive role for thioredoxin in protection from Cd 2+ led us to investigate the thioredoxin–cadmium interaction properties.We used calorimetric and spectroscopicmethods at different pHvalues to explore the relative contribution of putative binding residues (Cys32, Cys35, Trp28, Trp31 and Asp26) within or near the active site. At pH 8 or 7.5 two binding sites were identified by isothermal titration calorimetry with affinity constants of 10·10 6 M )1 and 1·10 6 M )1 . ...
11p
dell39
03-04-2013
36
3
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The physiological phenomenon that the antisweet taste effect of gymnemic acid (GA) is diminished by application of c-cyclodextrin (c-CD) to the mouth was evaluated at the molecular level using isothermal titration calorimetry, NMR and dynamic light scattering. These analyses showed that GA specifically binds to c-CD.
7p
dell39
27-03-2013
44
2
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hSfi1, a human centrosomal protein with homologs in other eukaryotic organisms, includes 23 repeats, each of 23 amino acids, separated by 10 residue linkers. The main molecular partner in the centrosome is a small, calcium-binding EF-hand protein, the human centrin 2. Using isothermal titration calorimetry experiments, we characterized the centrin-binding capacity of three isolated hSfi1 repeats, two exhibiting the general consen-sus motif and the third being the unique Pro-containing human repeat....
12p
inspiron33
25-03-2013
30
4
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We show that human stefin B, a protease inhibitor from the family of cystatins, is a copper binding protein, unlike stefin A. We have used isothermal titration calorimetry to directly monitor the binding event at pH 7 and pH 5. At pH 7 stefin B shows a picomolar affinity for copper but at pH 5 the affinity is in the nanomolar range.
14p
inspiron33
25-03-2013
36
3
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The E3 ubiquitin ligase CHIP (C-terminus of Hsc70-interacting protein) is believed to be a central player in the cellular triage decision, as it links the molecular chaperones Hsp70⁄Hsc70 and Hsp90 to the ubiquitin proteaso-mal degradation pathway. To better understand the decision process, we determined the affinity of CHIP for Hsp70 and Hsp90 using isothermal titration calorimetry.
15p
viettel02
19-02-2013
40
1
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Calorimetry, as a technique for thermal analysis, has a wide range of applications which are not only limited to studying the thermal characterisation (e.g. melting temperature, denaturation temperature and enthalpy change) of small and large drug molecules, but are also extended to characterisation of fuel, metals and oils.
0p
phoebe75
19-02-2013
73
6
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Although allostery plays a central role in driving protein–DNA interac-tions, the physical basis of such cooperative behavior remains poorly understood. In the present study, using isothermal titration calorimetry in conjunction with site-directed mutagenesis, we provide evidence that an intricate network of energetically-coupled residues within the basic regions of the Jun-Fos heterodimeric transcription factor accounts for its allosteric binding to DNA.
15p
cosis54
05-01-2013
33
2
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Substrate binding of a family GH19 chitinase from a moss species, Bryum coronatum(BcChi-A, 22 kDa), which is smaller than the 26 kDa family GH19 barley chitinase due to the lack of several loop regions (‘loop-less’), was investigated by oligosaccharide digestion, thermal unfolding experiments and isothermal titration calorimetry (ITC).
11p
cosis54
09-12-2012
54
1
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A rigorous understanding of any biological system that undergoes some change requires quantification of its thermodynamic and kinetic properties. Combined with structural detail, these data can be assimilated to enable a picture of the mechanism of the change (for example, going from the free to bound state in a biomolecular interaction, or from the folded to the unfolded state of a biomolecule). Isothermal titration calorimetry (ITC) and differential scanning calorimetry (DSC) provide the thermodynamic data required for developing this understanding.
276p
banhkem0908
24-11-2012
65
4
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