Reactivity of disulfide bonds is markedly affected by structure and environment: implications for protein modification and stability
Research output: Contribution to journal › Journal article › Research › peer-review
Standard
Reactivity of disulfide bonds is markedly affected by structure and environment : implications for protein modification and stability. / Karimi, Maryam; Ignasiak, Marta T; Chan, Bun; Croft, Anna K; Radom, Leo; Schiesser, Carl H; Pattison, David I; Davies, Michael J.
In: Scientific Reports, Vol. 6, 38572, 12.12.2016.Research output: Contribution to journal › Journal article › Research › peer-review
Harvard
APA
Vancouver
Author
Bibtex
}
RIS
TY - JOUR
T1 - Reactivity of disulfide bonds is markedly affected by structure and environment
T2 - implications for protein modification and stability
AU - Karimi, Maryam
AU - Ignasiak, Marta T
AU - Chan, Bun
AU - Croft, Anna K
AU - Radom, Leo
AU - Schiesser, Carl H
AU - Pattison, David I
AU - Davies, Michael J
PY - 2016/12/12
Y1 - 2016/12/12
N2 - Disulfide bonds play a key role in stabilizing protein structures, with disruption strongly associated with loss of protein function and activity. Previous data have suggested that disulfides show only modest reactivity with oxidants. In the current study, we report kinetic data indicating that selected disulfides react extremely rapidly, with a variation of 10(4) in rate constants. Five-membered ring disulfides are particularly reactive compared with acyclic (linear) disulfides or six-membered rings. Particular disulfides in proteins also show enhanced reactivity. This variation occurs with multiple oxidants and is shown to arise from favorable electrostatic stabilization of the incipient positive charge on the sulfur reaction center by remote groups, or by the neighboring sulfur for conformations in which the orbitals are suitably aligned. Controlling these factors should allow the design of efficient scavengers and high-stability proteins. These data are consistent with selective oxidative damage to particular disulfides, including those in some proteins.
AB - Disulfide bonds play a key role in stabilizing protein structures, with disruption strongly associated with loss of protein function and activity. Previous data have suggested that disulfides show only modest reactivity with oxidants. In the current study, we report kinetic data indicating that selected disulfides react extremely rapidly, with a variation of 10(4) in rate constants. Five-membered ring disulfides are particularly reactive compared with acyclic (linear) disulfides or six-membered rings. Particular disulfides in proteins also show enhanced reactivity. This variation occurs with multiple oxidants and is shown to arise from favorable electrostatic stabilization of the incipient positive charge on the sulfur reaction center by remote groups, or by the neighboring sulfur for conformations in which the orbitals are suitably aligned. Controlling these factors should allow the design of efficient scavengers and high-stability proteins. These data are consistent with selective oxidative damage to particular disulfides, including those in some proteins.
U2 - 10.1038/srep38572
DO - 10.1038/srep38572
M3 - Journal article
C2 - 27941824
VL - 6
JO - Scientific Reports
JF - Scientific Reports
SN - 2045-2322
M1 - 38572
ER -
ID: 172849790