Details of experiments between the fragments P56524~260-269 and P61981~1-247
Note that the results of all experiments are listed, regardless of the modification states of the fragments.



Experiment series 1

Protein A protein: HDAC4
Protein A fragment: 260-269
Protein A site: 14-3-3_pSer265
Protein A modification: (SEP)265
Protein A sequence: VAERRSSPLL
Protein A construct: VAERR(pSer)SPLL (crude synthetic peptide)

Protein B protein: YWHAG
Protein B fragment: 1-247
Protein B site: 14-3-3
Protein B modification: 100_uM_FCA
Protein B construct: avi-his6-MBP-TEVsite-14-3-3gamma

Average holdup BI: 0.85
Holdup BI standard deviation: 0.01
Immobilized partner concentration in holdup experiment (10-6M): 115
P value (usually -log10(P Two-sided unpaired T-test), but double check the experimental details): 8.5
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: 4.72


Experiment series 2

Protein A protein: HDAC4
Protein A fragment: 260-269
Protein A site: 14-3-3_pSer265
Protein A modification: (SEP)265
Protein A sequence: VAERRSSPLL
Protein A construct: VAERR(pSer)SPLL (crude synthetic peptide)

Protein B protein: YWHAG
Protein B fragment: 1-247
Protein B site: 14-3-3
Protein B construct: avi-his6-MBP-TEVsite-14-3-3gamma

Average holdup BI: 0.91
Holdup BI standard deviation: 0.01
Immobilized partner concentration in holdup experiment (10-6M): 129
P value (usually -log10(P Two-sided unpaired T-test), but double check the experimental details): 8.4
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: 4.91


Experiment series 3

Protein A protein: HDAC4
Protein A fragment: 260-269
Protein A site: 14-3-3_pSer265
Protein A modification: (SEP)265
Protein A sequence: VAERRSSPLL
Protein A construct: VAERR(pSer)SPLL (crude synthetic peptide)

Protein B protein: YWHAG
Protein B fragment: 1-247
Protein B site: 14-3-3
Protein B construct: avi-his6-MBP-TEVsite-14-3-3gamma

Average holdup BI: 0.88
Holdup BI standard deviation: 0.01
Immobilized partner concentration in holdup experiment (10-6M): 134
P value (usually -log10(P Two-sided unpaired T-test), but double check the experimental details): 8.28
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: 4.73