Inhibitors | Comment | Organism | Structure |
---|---|---|---|
gallium ferredoxin | binding of the redox-inactive gallium ferredoxin to PSI inhibits the electron transport reaction, binds to PSI competitively with ferredoxin suggesting a single ferredoxin?binding site in PSI, kinetics | Synechocystis sp. PCC 6803 | |
gallium ferredoxin | binding of the redox-inactive gallium ferredoxin to PSI inhibits the electron transport reaction, binds to PSI competitively with ferredoxin suggesting a single ferredoxin?binding site in PSI, kinetics | Thermosynechococcus vestitus |
KM Value [mM] | KM Value Maximum [mM] | Substrate | Comment | Organism | Structure |
---|---|---|---|---|---|
additional information | - |
additional information | thermodynamics and kinetics | Thermosynechococcus vestitus | |
additional information | - |
additional information | thermodynamics and kinetics | Synechocystis sp. PCC 6803 |
Natural Substrates | Organism | Comment (Nat. Sub.) | Natural Products | Comment (Nat. Pro.) | Rev. | Reac. |
---|---|---|---|---|---|---|
reduced plastocyanin + oxidized ferredoxin + hv | Thermosynechococcus vestitus | - |
oxidized plastocyanin + reduced ferredoxin | - |
? | |
reduced plastocyanin + oxidized ferredoxin + hv | Synechocystis sp. PCC 6803 | - |
oxidized plastocyanin + reduced ferredoxin | - |
? |
Organism | UniProt | Comment | Textmining |
---|---|---|---|
Synechocystis sp. PCC 6803 | P29254 AND P29255 AND P32422 | psaA, psaB, and psaC | - |
Thermosynechococcus vestitus | - |
- |
- |
Substrates | Comment Substrates | Organism | Products | Comment (Products) | Rev. | Reac. |
---|---|---|---|---|---|---|
additional information | reduction of ferredoxin by photosystem I (PSI) involves the [4Fe-4S] clusters FA and FB harbored by subunit PsaC, with FB being the direct electron transfer partner of ferredoxin. Assay in presence of 5 mM MgCl2, 30 mM NaCl and 0.03% beta-dodecyl-maltoside, with 1-2.5 mM sodium ascorbate and 0.008-0.025 mM 2,6-dichlorophenolindophenol | Thermosynechococcus vestitus | ? | - |
? | |
additional information | reduction of ferredoxin by photosystem I (PSI) involves the [4Fe-4S] clusters FA and FB harbored by subunit PsaC, with FB being the direct electron transfer partner of ferredoxin. Assay in presence of 5 mM MgCl2, 30 mM NaCl and 0.03% beta-dodecyl-maltoside, with 1-2.5 mM sodium ascorbate and 0.008-0.025 mM 2,6-dichlorophenolindophenol | Synechocystis sp. PCC 6803 | ? | - |
? | |
reduced plastocyanin + oxidized ferredoxin + hv | - |
Thermosynechococcus vestitus | oxidized plastocyanin + reduced ferredoxin | - |
? | |
reduced plastocyanin + oxidized ferredoxin + hv | - |
Synechocystis sp. PCC 6803 | oxidized plastocyanin + reduced ferredoxin | - |
? | |
reduced plastocyanin + oxidized ferredoxin + hv | ferredoxin from Thermosynechococcus elongatus | Thermosynechococcus vestitus | oxidized plastocyanin + reduced ferredoxin | - |
? | |
reduced plastocyanin + oxidized ferredoxin + hv | ferredoxin from Thermosynechococcus elongatus | Synechocystis sp. PCC 6803 | oxidized plastocyanin + reduced ferredoxin | - |
? |
Subunits | Comment | Organism |
---|---|---|
trimer | - |
Thermosynechococcus vestitus |
trimer | - |
Synechocystis sp. PCC 6803 |
pH Optimum Minimum | pH Optimum Maximum | Comment | Organism |
---|---|---|---|
8 | - |
assay at | Thermosynechococcus vestitus |
8 | - |
assay at | Synechocystis sp. PCC 6803 |
Cofactor | Comment | Organism | Structure |
---|---|---|---|
[4Fe-4S]-center | reduction of ferredoxin by photosystem I (PSI) involves the [4Fe-4S] clusters FA and FB harbored by subunit PsaC, with FB being the direct electron transfer partner of ferredoxin | Thermosynechococcus vestitus | |
[4Fe-4S]-center | reduction of ferredoxin by photosystem I (PSI) involves the [4Fe-4S] clusters FA and FB harbored by subunit PsaC, with FB being the direct electron transfer partner of ferredoxin | Synechocystis sp. PCC 6803 |
General Information | Comment | Organism |
---|---|---|
additional information | PS I binding analysis using redox-inactive gallium ferredoxin, overview. Gallium ferredoxin binds to PSI competitively with ferredoxin suggesting a single ferredoxin-binding site in PSI, kinetics | Synechocystis sp. PCC 6803 |
additional information | PS I binding analysis using redox-inactive gallium ferredoxin, overview. Gallium ferredoxin binds to PSI competitively with ferredoxin suggesting a single ferredoxin?binding site in PSI, kinetics | Thermosynechococcus vestitus |