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NanoTemper Technologies itc buffer
Thermodynamic parameters of the <t>ITC</t> experiments between various KLC1-TPR fragments and mutants and JIP1-C10 peptides
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1) Product Images from "Characterization of the binding mode of JNK-interacting protein 1 (JIP1) to kinesin-light chain 1 (KLC1)"

Article Title: Characterization of the binding mode of JNK-interacting protein 1 (JIP1) to kinesin-light chain 1 (KLC1)

Journal: The Journal of Biological Chemistry

doi: 10.1074/jbc.RA118.003916

Thermodynamic parameters of the ITC experiments between various KLC1-TPR fragments and mutants and JIP1-C10 peptides
Figure Legend Snippet: Thermodynamic parameters of the ITC experiments between various KLC1-TPR fragments and mutants and JIP1-C10 peptides

Techniques Used:

Mechanism of JIP1-Cter binding to KLC1-TPR domain. A, isothermal titration calorimetry measurements of the reference KLC1-TPR-[A1-B6] fragment with the JIP1-C10-wt peptide. This reference measurement was performed at 25 °C in a buffer containing 25 mm Hepes, pH 7.0, and 150 mm NaCl. B, superposition of ITC curves of the reference KLC1-TPR-[A1-B6] fragment with the JIP1-C10-wt peptide at 25 °C in a buffer containing variable ionic strength (150, 250, or 500 mm NaCl). C, superposition of ITC curves showing the interaction between the reference KLC1-TPR-[A1-B6] fragment and JIP1-C10-E706A/D707A double mutant (blue), JIP1-C10-I708A/L710A double mutant (green), and JIP1-C10-Y709A mutant (red). For comparison, the reference measurement between the KLC1-TPR-[A1-B6] fragment and the JIP1-C10-wt peptide is reported (black). Sequence alignment of the different JIP1-C10 peptides used for this experiment is shown below. The solid lines drawn through the data points match the best fit to the data.
Figure Legend Snippet: Mechanism of JIP1-Cter binding to KLC1-TPR domain. A, isothermal titration calorimetry measurements of the reference KLC1-TPR-[A1-B6] fragment with the JIP1-C10-wt peptide. This reference measurement was performed at 25 °C in a buffer containing 25 mm Hepes, pH 7.0, and 150 mm NaCl. B, superposition of ITC curves of the reference KLC1-TPR-[A1-B6] fragment with the JIP1-C10-wt peptide at 25 °C in a buffer containing variable ionic strength (150, 250, or 500 mm NaCl). C, superposition of ITC curves showing the interaction between the reference KLC1-TPR-[A1-B6] fragment and JIP1-C10-E706A/D707A double mutant (blue), JIP1-C10-I708A/L710A double mutant (green), and JIP1-C10-Y709A mutant (red). For comparison, the reference measurement between the KLC1-TPR-[A1-B6] fragment and the JIP1-C10-wt peptide is reported (black). Sequence alignment of the different JIP1-C10 peptides used for this experiment is shown below. The solid lines drawn through the data points match the best fit to the data.

Techniques Used: Binding Assay, Isothermal Titration Calorimetry, Mutagenesis, Comparison, Sequencing

Binding experiments between SH2D6 peptides and the reference KLC1-TPR-[A1-B6] fragment. A, sequence alignment of the different SH2D6 and JIP1-C10 peptides used for these binding experiments. B, superposition of ITC curves showing the interaction between the reference KLC1-TPR-[A1-B6] fragment and JIP1-C10 WT (reference measurement; black), SH2D6-[172–181] peptide (blue) and SH2D6-[170–181] peptide (green), as well as the interaction between an equivalent KLC2-TPR-[A1-B6]-wt fragment and SH2D6-[170–181] peptide (red). The solid lines drawn through the data points match the best fit to the data. C, superposition of MST curves showing the interaction between the labeled KLC1-TPR-[A1-B6] fragment and JIP1-C10 WT (reference measurement; green) and the SH2D6-[172–181] (red) peptides. The curves represent an average of three independent measurements with the S.D. shown by error bars.
Figure Legend Snippet: Binding experiments between SH2D6 peptides and the reference KLC1-TPR-[A1-B6] fragment. A, sequence alignment of the different SH2D6 and JIP1-C10 peptides used for these binding experiments. B, superposition of ITC curves showing the interaction between the reference KLC1-TPR-[A1-B6] fragment and JIP1-C10 WT (reference measurement; black), SH2D6-[172–181] peptide (blue) and SH2D6-[170–181] peptide (green), as well as the interaction between an equivalent KLC2-TPR-[A1-B6]-wt fragment and SH2D6-[170–181] peptide (red). The solid lines drawn through the data points match the best fit to the data. C, superposition of MST curves showing the interaction between the labeled KLC1-TPR-[A1-B6] fragment and JIP1-C10 WT (reference measurement; green) and the SH2D6-[172–181] (red) peptides. The curves represent an average of three independent measurements with the S.D. shown by error bars.

Techniques Used: Binding Assay, Sequencing, Labeling

Minimal region of KLC1-TPR for JIP1-C10 binding. Superposition of ITC curves shows the interaction between the JIP1-C10-wt peptide and N-terminal truncated fragments (A) and C-terminal truncated fragments (B) of KLC1-TPR domain. For comparison, the reference measurement between the JIP1-C10-wt peptide and the complete KLC1-TPR-[A1-B6] fragment is reported (black). C, color-based representation of the 3D template structure of the KLC1-TPR domain (PDB code 3NF1) according to the -fold decrease in binding affinity (Kd) measured in ITC. The solid lines drawn through the data points match the best fit to the data.
Figure Legend Snippet: Minimal region of KLC1-TPR for JIP1-C10 binding. Superposition of ITC curves shows the interaction between the JIP1-C10-wt peptide and N-terminal truncated fragments (A) and C-terminal truncated fragments (B) of KLC1-TPR domain. For comparison, the reference measurement between the JIP1-C10-wt peptide and the complete KLC1-TPR-[A1-B6] fragment is reported (black). C, color-based representation of the 3D template structure of the KLC1-TPR domain (PDB code 3NF1) according to the -fold decrease in binding affinity (Kd) measured in ITC. The solid lines drawn through the data points match the best fit to the data.

Techniques Used: Binding Assay, Comparison

Identification of critical residues of KLC1-TPR for JIP1-C10 binding. A, KLC1-TPR residues examined by ITC for their binding to JIP1-C10-wt peptide are indicated by white spheres and labeled on the 3D template structure of the KLC1-TPR domain. The critical Asn343 position is indicated with a red star (15). KLC1-TPR is shown in a cartoon and colored according to the -fold decrease in binding affinity (Kd) measured in ITC, as shown in Fig. 4C. B and C, superposition of ITC curves showing the interaction of the JIP1-C10-wt peptide with the asparagine mutants (B) and the arginine/lysine mutants (C) of the reference KLC1-TPR-[A1-B6] fragment. For comparison, the reference measurement between the JIP1-C10-wt peptide and the complete KLC1-TPR-[A1-B6] fragment is reported (black). The solid lines drawn through the data points match the best fit to the data. D, surface representation of the 3D structure of KLC1-TPR template (PDB code 3NF1; same orientation as in A) colored in white with critical residues indicated in red and residues in close proximity indicated in pink.
Figure Legend Snippet: Identification of critical residues of KLC1-TPR for JIP1-C10 binding. A, KLC1-TPR residues examined by ITC for their binding to JIP1-C10-wt peptide are indicated by white spheres and labeled on the 3D template structure of the KLC1-TPR domain. The critical Asn343 position is indicated with a red star (15). KLC1-TPR is shown in a cartoon and colored according to the -fold decrease in binding affinity (Kd) measured in ITC, as shown in Fig. 4C. B and C, superposition of ITC curves showing the interaction of the JIP1-C10-wt peptide with the asparagine mutants (B) and the arginine/lysine mutants (C) of the reference KLC1-TPR-[A1-B6] fragment. For comparison, the reference measurement between the JIP1-C10-wt peptide and the complete KLC1-TPR-[A1-B6] fragment is reported (black). The solid lines drawn through the data points match the best fit to the data. D, surface representation of the 3D structure of KLC1-TPR template (PDB code 3NF1; same orientation as in A) colored in white with critical residues indicated in red and residues in close proximity indicated in pink.

Techniques Used: Binding Assay, Labeling, Comparison

Related Articles

Labeling:

Article Title: Characterization of the binding mode of JNK-interacting protein 1 (JIP1) to kinesin-light chain 1 (KLC1)
Article Snippet: .. For experiments, the labeled sample was then adjusted to 40 n m with the ITC buffer containing 25 m m Hepes, pH 7.0, and 150 m m NaCl supplemented with 0.05% Tween 20 (NanoTemper Technologies). ..

Article Title: Characterization of the binding mode of JNK-interacting protein 1 (JIP1) to kinesin-light chain 1 (KLC1)
Article Snippet: .. For experiments, the labeled sample was then adjusted to 40 nM with the ITC buffer containing 25 mM Hepes pH 7.0 and 150 mM NaCl supplemented with 0.05 % Tween-20 (NanoTemper Technologies). ..



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Journal: bioRxiv

Article Title: FragLite mapping to identify the BRD4 recruitment site of P-TEFb

doi: 10.64898/2026.04.09.717428

Figure Lengend Snippet: ( a ) Characterisation of BRD4 mutants that disrupt binding to CDK9-cyclin T1. Mutation of residues Gln1350, Leu1354 and Phe1357, highlighted by the FragLite map and AlphaFold3 model disrupt BRD4 binding to CDK9-Cyclin T1. ( b ) Mutation of BRD4 residues Leu1354 and Phe1357, leads to a loss of BRD4 binding to CDK9-cyclin T2 in a fluorescence polarisation (FP) assay. ( c ) The cyclin T1 Tyr175Ala mutation reduces the Homogenous Time-Resolved Fluorescence (HTRF) signal, whereas the Trp210Ala mutation, previously identified as important for AFF4 interaction and adjacent to Tyr175, shows signals comparable to wild-type. ( d-g ) Isothermal Titration Calorimetry (ITC) plots of CDK9-cyclin T2 complexes with BRD4. Representative titration plots for (d) CDK9-cyclin T2 (e) CDK9-cyclin T2 Tyr174Ala, (f) CDK9-cyclin T2 Phe175Ala (negative control), and (g) CDK9-cyclin T2 Trp206Ala vs the BRD4 P-TEFb Interaction Domain (PID). The top panels show the raw heat signal, and the bottom panels show the integrated heat per injection fitted to a single-site binding model. HTRF experiments were carried out in triplicate and repeated on three separate days. The error bars indicate SD. FP experiments were carried out in triplicate and repeated on three separate days. ITC thermodynamic parameters (K d ) were derived from three independent biological replicates. Derived K d values are compiled in . Related to and Supplementary Figure 11.

Article Snippet: CDK9-cyclin T2 was buffer exchanged using a HiTrap desalting column (5 mL) (Cytiva) into ITC buffer (50 mM HEPES, 300 mM NaCl, 0.5 mM TCEP, pH 7.4) and protein concentration was then determined using a Nanodrop 2000 at an absorbance of 280 nm with sequence derived extinction coefficients ( http://web.expasy.org/ protparam/).

Techniques: Binding Assay, Mutagenesis, Fluorescence, FP Assay, Isothermal Titration Calorimetry, Titration, Negative Control, Injection, Derivative Assay