A new method for determining the heat capacity change for protein folding.


Abstract

In order to use results from calorimetry or thermal unfolding curves to estimate the free energy change for protein unfolding at 25 degrees C, it is necessary to know the change in heat capacity for unfolding, delta Cp. We describe a new method for measuring delta Cp which is based on results from urea and thermal unfolding curves but does not require a calorimeter. We find that delta Cp = 1650 +/- 200 cal/(deg.mol) for the unfolding of ribonuclease T1 and that delta Cp = 2200 +/- 300 cal/(deg.mol) for the unfolding of ribonuclease A. Study holds ProTherm entries: 3780, 3781, 3782, 3783, 3784, 3785, 3786, 3787, 3788, 3789, 3790, 3791, 3792, 3793, 3794, 3795, 3796, 3797, 3798, 3799, 3800, 3801 Extra Details: heat capacity change; protein folding;,thermal unfolding curves; free energy change

Submission Details

ID: p4fK6s8c

Submitter: Connie Wang

Submission Date: April 24, 2018, 8:22 p.m.

Version: 1

Publication Details
Pace CN;Laurents DV,Biochemistry (1989) A new method for determining the heat capacity change for protein folding. PMID:2499351
Additional Information

Number of data points 84
Proteins Guanyl-specific ribonuclease T1 ; Guanyl-specific ribonuclease T1
Unique complexes 2
Assays/Quantities/Protocols Experimental Assay: Cm temp:27.75 C, buffers:glycine: 30 mM, pH:2.8 ; Experimental Assay: dCp temp:27.75 C, buffers:glycine: 30 mM, pH:2.8 ; Experimental Assay: m temp:27.75 C, buffers:glycine: 30 mM, pH:2.8 ; Experimental Assay: dG_H2O temp:27.75 C, buffers:glycine: 30 mM, pH:2.8 ; Experimental Assay: Cm temp:24.9 C, buffers:glycine: 30 mM, pH:2.8 ; Experimental Assay: dCp temp:24.9 C, buffers:glycine: 30 mM, pH:2.8 ; Experimental Assay: m temp:24.9 C, buffers:glycine: 30 mM, pH:2.8 ; Experimental Assay: dG_H2O temp:24.9 C, buffers:glycine: 30 mM, pH:2.8 ; Experimental Assay: Cm buffers:glycine: 30 mM, pH:2.8, temp:21.1 C ; Experimental Assay: dCp buffers:glycine: 30 mM, pH:2.8, temp:21.1 C ; Experimental Assay: m buffers:glycine: 30 mM, pH:2.8, temp:21.1 C ; Experimental Assay: dG_H2O buffers:glycine: 30 mM, pH:2.8, temp:21.1 C ; Experimental Assay: Cm temp:17.1 C, pH:2.8, buffers:glycine: 30 mM ; Experimental Assay: dCp temp:17.1 C, pH:2.8, buffers:glycine: 30 mM ; Experimental Assay: m temp:17.1 C, pH:2.8, buffers:glycine: 30 mM ; Experimental Assay: dG_H2O temp:17.1 C, pH:2.8, buffers:glycine: 30 mM ; Experimental Assay: Cm buffers:HEPPSO: 30 mM, pH:7.9, temp:28.95 C ; Experimental Assay: dCp buffers:HEPPSO: 30 mM, pH:7.9, temp:28.95 C ; Experimental Assay: m buffers:HEPPSO: 30 mM, pH:7.9, temp:28.95 C ; Experimental Assay: dG_H2O buffers:HEPPSO: 30 mM, pH:7.9, temp:28.95 C ; Experimental Assay: Cm buffers:HEPPSO: 30 mM, pH:7.9, temp:25.0 C ; Experimental Assay: dCp buffers:HEPPSO: 30 mM, pH:7.9, temp:25.0 C ; Experimental Assay: m buffers:HEPPSO: 30 mM, pH:7.9, temp:25.0 C ; Experimental Assay: dG_H2O buffers:HEPPSO: 30 mM, pH:7.9, temp:25.0 C ; Experimental Assay: Cm temp:22.0 C, buffers:HEPPSO: 30 mM, pH:7.9 ; Experimental Assay: dCp temp:22.0 C, buffers:HEPPSO: 30 mM, pH:7.9 ; Experimental Assay: m temp:22.0 C, buffers:HEPPSO: 30 mM, pH:7.9 ; Experimental Assay: dG_H2O temp:22.0 C, buffers:HEPPSO: 30 mM, pH:7.9 ; Experimental Assay: Cm buffers:HEPPSO: 30 mM, temp:19.05 C, pH:7.9 ; Experimental Assay: dCp buffers:HEPPSO: 30 mM, temp:19.05 C, pH:7.9 ; Experimental Assay: m buffers:HEPPSO: 30 mM, temp:19.05 C, pH:7.9 ; Experimental Assay: dG_H2O buffers:HEPPSO: 30 mM, temp:19.05 C, pH:7.9 ; Experimental Assay: Cm temp:29.0 C, buffers:MOPS: 30 mM, pH:7.0 ; Experimental Assay: dCp temp:29.0 C, buffers:MOPS: 30 mM, pH:7.0 ; Experimental Assay: m temp:29.0 C, buffers:MOPS: 30 mM, pH:7.0 ; Experimental Assay: dG_H2O temp:29.0 C, buffers:MOPS: 30 mM, pH:7.0 ; Experimental Assay: Cm buffers:MOPS: 30 mM, temp:27.0 C, pH:7.0 ; Experimental Assay: dCp pH:7.0, buffers:MOPS: 30 mM, temp:27.0 C ; Experimental Assay: m buffers:MOPS: 30 mM, temp:27.0 C, pH:7.0 ; Experimental Assay: dG_H2O buffers:MOPS: 30 mM, temp:27.0 C, pH:7.0 ; Experimental Assay: Cm buffers:MOPS: 30 mM, temp:25.0 C, pH:7.0 ; Experimental Assay: dCp buffers:MOPS: 30 mM, pH:7.0, temp:25.0 C ; Experimental Assay: m buffers:MOPS: 30 mM, temp:25.0 C, pH:7.0 ; Experimental Assay: dG_H2O buffers:MOPS: 30 mM, temp:25.0 C, pH:7.0 ; Experimental Assay: Cm buffers:MOPS: 30 mM, temp:23.05 C, pH:7.0 ; Experimental Assay: dCp buffers:MOPS: 30 mM, pH:7.0, temp:23.05 C ; Experimental Assay: m buffers:MOPS: 30 mM, temp:23.05 C, pH:7.0 ; Experimental Assay: dG_H2O buffers:MOPS: 30 mM, temp:23.05 C, pH:7.0 ; Experimental Assay: Cm buffers:MOPS: 30 mM, temp:21.1 C, pH:7.0 ; Experimental Assay: dCp buffers:MOPS: 30 mM, pH:7.0, temp:21.1 C ; Experimental Assay: m buffers:MOPS: 30 mM, temp:21.1 C, pH:7.0 ; Experimental Assay: dG_H2O buffers:MOPS: 30 mM, temp:21.1 C, pH:7.0 ; Experimental Assay: Cm buffers:MOPS: 30 mM, temp:19.2 C, pH:7.0 ; Experimental Assay: dCp buffers:MOPS: 30 mM, pH:7.0, temp:19.2 C ; Experimental Assay: m buffers:MOPS: 30 mM, temp:19.2 C, pH:7.0 ; Experimental Assay: dG_H2O buffers:MOPS: 30 mM, temp:19.2 C, pH:7.0 ; Experimental Assay: Cm pH:5.95, buffers:MES: 30 mM, temp:29.1 C ; Experimental Assay: dCp pH:5.95, buffers:MES: 30 mM, temp:29.1 C ; Experimental Assay: m pH:5.95, buffers:MES: 30 mM, temp:29.1 C ; Experimental Assay: dG_H2O pH:5.95, buffers:MES: 30 mM, temp:29.1 C ; Experimental Assay: Cm pH:5.95, buffers:MES: 30 mM, temp:25.05 C ; Experimental Assay: dCp pH:5.95, buffers:MES: 30 mM, temp:25.05 C ; Experimental Assay: m pH:5.95, buffers:MES: 30 mM, temp:25.05 C ; Experimental Assay: dG_H2O pH:5.95, buffers:MES: 30 mM, temp:25.05 C ; Experimental Assay: Cm pH:5.95, temp:22.0 C, buffers:MES: 30 mM ; Experimental Assay: dCp pH:5.95, temp:22.0 C, buffers:MES: 30 mM ; Experimental Assay: m pH:5.95, temp:22.0 C, buffers:MES: 30 mM ; Experimental Assay: dG_H2O pH:5.95, temp:22.0 C, buffers:MES: 30 mM ; Experimental Assay: Cm pH:5.95, temp:19.05 C, buffers:MES: 30 mM ; Experimental Assay: dCp pH:5.95, temp:19.05 C, buffers:MES: 30 mM ; Experimental Assay: m pH:5.95, temp:19.05 C, buffers:MES: 30 mM ; Experimental Assay: dG_H2O pH:5.95, temp:19.05 C, buffers:MES: 30 mM ; Experimental Assay: dCp pH:2.8, buffers:glycine: 30 mM ; Experimental Assay: dHcal buffers:glycine: 30 mM, pH:2.8 ; Experimental Assay: Tm buffers:glycine: 30 mM, pH:2.8 ; Experimental Assay: dCp buffers:HEPPSO: 30 mM, pH:7.9 ; Experimental Assay: dHcal buffers:HEPPSO: 30 mM, pH:7.9 ; Experimental Assay: Tm buffers:HEPPSO: 30 mM, pH:7.9 ; Experimental Assay: dCp buffers:MOPS: 30 mM, pH:7.0 ; Experimental Assay: dHcal buffers:MOPS: 30 mM, pH:7.0 ; Experimental Assay: Tm buffers:MOPS: 30 mM, pH:7.0 ; Experimental Assay: dCp pH:5.95, buffers:MES: 30 mM ; Experimental Assay: dHcal pH:5.95, buffers:MES: 30 mM ; Experimental Assay: Tm pH:5.95, buffers:MES: 30 mM
Libraries Mutations for sequence ACDYTCGSNCYSSSDVSTAQAAGYQLHEDGETVGSNSYPHKYNNYEGFDFSVSSPYYEWPILSSGDVYSGGSPGADRVVFNENNQLAGVITHTGASGNNFVECT ; Mutations for sequence MMYSKLLTLTTLLLPTALALPSLVERACDYTCGSNCYSSSDVSTAQAAGYQLHEDGETVGSNSYPHKYNNYEGFDFSVSSPYYEWPILSSGDVYSGGSPGADRVVFNENNQLAGVITHTGASGNNFVECT
Sequence Assay Result Units