Predicting pKa for proteins using COSMO-RS
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Predicting pKa for proteins using COSMO-RS. / Andersson, Martin Peter; Jensen, Jan Halborg; Stipp, Susan Louise Svane.
I: PeerJ, Bind 1, e198, 2013.Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
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TY - JOUR
T1 - Predicting pKa for proteins using COSMO-RS
AU - Andersson, Martin Peter
AU - Jensen, Jan Halborg
AU - Stipp, Susan Louise Svane
N1 - O.A.
PY - 2013
Y1 - 2013
N2 - We have used the COSMO-RS implicit solvation method to calculate the equilibrium constants, pKa, for deprotonation of the acidic residues of the ovomucoid inhibitor protein, OMTKY3. The root mean square error for comparison with experimental data is only 0.5 pH units and the maximum error 0.8 pH units. The results show that the accuracy of pKa prediction using COSMO-RS is as good for large biomolecules as it is for smaller inorganic and organic acids and that the method compares very well to previous pKa predictions of the OMTKY3 protein using Quantum Mechanics/Molecular Mechanics. Our approach works well for systems of about 1000 atoms or less, which makes it useful for small proteins as well as for investigating portions of larger proteins such as active sites in enzymes.
AB - We have used the COSMO-RS implicit solvation method to calculate the equilibrium constants, pKa, for deprotonation of the acidic residues of the ovomucoid inhibitor protein, OMTKY3. The root mean square error for comparison with experimental data is only 0.5 pH units and the maximum error 0.8 pH units. The results show that the accuracy of pKa prediction using COSMO-RS is as good for large biomolecules as it is for smaller inorganic and organic acids and that the method compares very well to previous pKa predictions of the OMTKY3 protein using Quantum Mechanics/Molecular Mechanics. Our approach works well for systems of about 1000 atoms or less, which makes it useful for small proteins as well as for investigating portions of larger proteins such as active sites in enzymes.
U2 - 10.7717/peerj.198
DO - 10.7717/peerj.198
M3 - Journal article
C2 - 24244915
VL - 1
JO - PeerJ
JF - PeerJ
SN - 2167-8359
M1 - e198
ER -
ID: 99353436