Details of experiments between the fragments Q86TI0~232-241 and P31947~1-248
Note that the results of all experiments are listed, regardless of the modification states of the fragments.



Experiment series 1

Protein A protein: TBC1D1
Protein A fragment: 232-241
Protein A site: 14-3-3_pSer237
Protein A modification: (SEP)237
Protein A sequence: MRKSFSQPGL
Protein A construct: MRKSF(pSer)QPGL (crude synthetic peptide)

Protein B protein: SFN
Protein B fragment: 1-248
Protein B site: 14-3-3
Protein B construct: avi-his6-MBP-TEVsite-14-3-3sigma

Average holdup BI: 0.6
Holdup BI standard deviation: 0.14
Immobilized partner concentration in holdup experiment (10-6M): 113
P value (usually -log10(P Two-sided unpaired T-test), but double check the experimental details): 2.97
Experiment method: HU Multiplex
Details of affinity fitting: hyperbolic binding equation
Date of measurement: 2022.02.17.
Experimental details: -log10(P Two-sided unpaired T-test (4 vs 4))
Number of measurements: 4
Measured pKd: 4.12


Experiment series 2

Protein A protein: TBC1D1
Protein A fragment: 232-241
Protein A site: 14-3-3_pSer237
Protein A modification: (SEP)237
Protein A sequence: MRKSFSQPGL
Protein A construct: MRKSF(pSer)QPGL (crude synthetic peptide)

Protein B protein: SFN
Protein B fragment: 1-248
Protein B site: 14-3-3
Protein B modification: 100_uM_FCA
Protein B construct: avi-his6-MBP-TEVsite-14-3-3sigma

Average holdup BI: 0.56
Holdup BI standard deviation: 0.22
Immobilized partner concentration in holdup experiment (10-6M): 111
P value (usually -log10(P Two-sided unpaired T-test), but double check the experimental details): 2.57
Experiment method: HU Multiplex
Details of affinity fitting: hyperbolic binding equation
Date of measurement: 2022.02.17.
Experimental details: -log10(P Two-sided unpaired T-test (4 vs 4))
Number of measurements: 4
Measured pKd: 4.07


Experiment series 3

Protein A protein: TBC1D1
Protein A fragment: 232-241
Protein A site: 14-3-3_pSer237
Protein A modification: (SEP)237
Protein A sequence: MRKSFSQPGL
Protein A construct: MRKSF(pSer)QPGL (crude synthetic peptide)

Protein B protein: SFN
Protein B fragment: 1-248
Protein B site: 14-3-3
Protein B construct: avi-his6-MBP-TEVsite-14-3-3sigma

Average holdup BI: 0.47
Holdup BI standard deviation: 0.15
Immobilized partner concentration in holdup experiment (10-6M): 142
P value (usually -log10(P Two-sided unpaired T-test), but double check the experimental details): 2.32
Experiment method: HU Multiplex
Details of affinity fitting: hyperbolic binding equation
Date of measurement: 2021.10.13.
Experimental details: -log10(P Two-sided unpaired T-test (4 vs 5))
Number of measurements: 5
Measured pKd: 3.8