Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
}
TY - JOUR
T1 - Inactive forms of wheat ribulose bisphosphate carboxylase. Conversion from the slowly activating into the rapidly activating form.
AU - Schmidt, C. N.
AU - Gutteridge, S.
AU - Parry, M. A.
AU - Keys, A. J.
PY - 1984/6/15
Y1 - 1984/6/15
N2 - Wheat ribulose bisphosphate carboxylase can be converted from the slowly activating into the rapidly activating form by heat or effectors in the absence of CO2 and Mg2+. This conversion process had the same energy of activation of 95.6kJ/mol both in the presence and in the absence of effectors, whereas the free-energy change value ranged from +2.5kJ/mol to -3.4kJ/mol depending on the end product involved. Far-u.v. c.d. spectra measured before and after conversion indicated that ribulose bisphosphate carboxylase is an alpha/beta-class protein and that no significant changes in gross conformation occur. Signals in the near-u.v. region suggested that the main change during conversion is re-orientation of aromatic side chains, probably near the active site; a possible site for effector binding is discussed.
AB - Wheat ribulose bisphosphate carboxylase can be converted from the slowly activating into the rapidly activating form by heat or effectors in the absence of CO2 and Mg2+. This conversion process had the same energy of activation of 95.6kJ/mol both in the presence and in the absence of effectors, whereas the free-energy change value ranged from +2.5kJ/mol to -3.4kJ/mol depending on the end product involved. Far-u.v. c.d. spectra measured before and after conversion indicated that ribulose bisphosphate carboxylase is an alpha/beta-class protein and that no significant changes in gross conformation occur. Signals in the near-u.v. region suggested that the main change during conversion is re-orientation of aromatic side chains, probably near the active site; a possible site for effector binding is discussed.
U2 - 10.1042/bj2200781
DO - 10.1042/bj2200781
M3 - Journal article
C2 - 6466304
AN - SCOPUS:0021763607
VL - 220
SP - 781
EP - 785
JO - The Biochemical journal
JF - The Biochemical journal
SN - 0264-6021
IS - 3
ER -