Details of experiments between the fragments O60292~1377-1386 and P63104~1-245
Note that the results of all experiments are listed, regardless of the modification states of the fragments.
Experiment series 1
Protein A protein: SIPA1L3
Protein A fragment: 1377-1386
Protein A site: 14-3-3_pSer1382
Protein A modification: (SEP)1382
Protein A sequence: RPKLYSSGSS
Protein A construct: RPKLY(pSer)SGSS (crude synthetic peptide)
Protein B protein: YWHAZ
Protein B fragment: 1-245
Protein B site: 14-3-3
Protein B construct: avi-his6-MBP-TEVsite-14-3-3zeta
Average holdup BI: 0.17
Holdup BI standard deviation: 0.03
Immobilized partner concentration in holdup experiment (10-6M): 132
P value (usually -log10(P Two-sided unpaired T-test), but double check the experimental details): 4.49
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
The affinity was below the detection threshold of the assay.
Experiment series 2
Protein A protein: SIPA1L3
Protein A fragment: 1377-1386
Protein A site: 14-3-3_pSer1382
Protein A modification: (SEP)1382
Protein A sequence: RPKLYSSGSS
Protein A construct: biotin-ttds-RPKLY(pSer)SGSS (HPLC-purified synthetic peptide)
Protein B protein: YWHAZ
Protein B fragment: 1-245
Protein B site: 14-3-3
Protein B construct: avi-his6-MBP-TEVsite-14-3-3zeta
Measured dissociation constant (10-6M): 481
Standard deviation of dissociation constant (10-6M): 22
Experiment method: competitive Fluorescence Polarization
Details of affinity fitting: Competitive binding equation in ProFit
Date of measurement: 2022.01.19
Number of measurements: 3
Measured pKd: 3.32
Experiment series 3
Protein A protein: SIPA1L3
Protein A fragment: 1377-1386
Protein A site: 14-3-3_pSer1382
Protein A modification: (SEP)1382
Protein A sequence: RPKLYSSGSS
Protein A construct: biotin-ttds-RPKLY(pSer)SGSS (HPLC-purified synthetic peptide)
Protein B protein: YWHAZ
Protein B fragment: 1-245
Protein B site: 14-3-3
Protein B construct: avi-his6-MBP-TEVsite-14-3-3zeta
Measured dissociation constant (10-6M): 445
Standard deviation of dissociation constant (10-6M): 35
Experiment method: competitive Fluorescence Polarization
Details of affinity fitting: Competitive binding equation in ProFit
Date of measurement: 2022.02.10
Number of measurements: 3
Measured pKd: 3.35