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Holzwarth_2006
Holzwarth AR, Mueller, Reus M, Nowaczyk M, Sander J and Roegner M (2006) Kinetics and mechanism of electron transfer in intact photosystem II and in the isolated reaction center: pheophytin is the primary electron acceptor. Proc Natl Acad Sci U S A 103: 6895-6900
DOIi:10.1073/pnas.0505371103
Simulation type: fixed
Simulation type: reaction
Simulation type: reaction
Simulation type: reaction
Simulation type: reaction
Simulation type: reaction
Simulation type: reaction
"Excitation delocalized into all antenna chlorophylls, ac, is radiatively lost via fluorescence emission."
Function: Mass Action (irreversible)
Reaction rate: kF*P680 / Qa / PhD1 / ac* / ChlD1
Product: P680 / Qa / PhD1 / ac / ChlD1
Kinetic rate constant | Value |
---|---|
kF | 67000000 |
"Excitation delocalized into all antenna chlorophylls, ac, is non-radiatively lost via heat dissipation."
Function: Mass Action (irreversible)
Reaction rate: k1*P680 / Qa / PhD1 / ac* / ChlD1
Product: P680 / Qa / PhD1 / ac / ChlD1
Kinetic rate constant | Value |
---|---|
k1 | 200000 |
Function: Mass Action (irreversible)
Reaction rate: k1*P680 / Qa / PhD1- / ac / ChlD1+
Product: P680 / Qa / PhD1 / ac / ChlD1*
Kinetic rate constant | Value |
---|---|
k1 | 500000000000 |
"The oxidized primary electron donor in photosystem II, ChlD1, is reduced by electron donated by the secondary electron donor in photosystem II, P680, which was originally thought to be the primary electron donor in photosystem II."
Function: Mass Action (irreversible)
Reaction rate: k1*P680 / Qa / PhD1- / ac / ChlD1+
Product: P680+ / Qa / PhD1- / ac / ChlD1
Kinetic rate constant | Value |
---|---|
k1 | 250000000000 |
Function: Mass Action (reversible)
Reaction rate: k1*P680 / Qa / PhD1 / ac* / ChlD1-k2*P680 / Qa / PhD1 / ac / ChlD1*
Product: P680 / Qa / PhD1 / ac / ChlD1*
Kinetic rate constant | Value |
---|---|
k1 | 19200000000 |
k2 | 25000000000 |
"After excitation of the primary electron donor in photosystem II, ChlD1, the primary charge separation between the primary electron donor and the primary electron acceptor, pheophytin PhD1, in photosystem II occurs."
Function: Mass Action (irreversible)
Reaction rate: k1*P680 / Qa / PhD1 / ac / ChlD1*
Product: P680 / Qa / PhD1- / ac / ChlD1+
Kinetic rate constant | Value |
---|---|
k1 | 500000000000 |
"The charge stabilization in photosystem II occurs by means of reduction of the primary quinone electron acceptor in photosystem II, Qa, by the reduced primary electron acceptor in photosystem II, pheophytin PhD1."
Function: Mass Action (irreversible)
Reaction rate: k1*P680+ / Qa / PhD1- / ac / ChlD1
Product: P680+ / Qa- / PhD1 / ac / ChlD1
Kinetic rate constant | Value |
---|---|
k1 | 4800000000 |