Protein Variants | Comment | Organism |
---|---|---|
H1144Q | ratio between the ferredoxin-dependent and the methyl viologen-dependent GOGAT activities is decreased by 18.7fold | Synechocystis sp. |
additional information | residues Gln467, His1144, Asn1147, Arg1162, and Trp676 constitute key binding residues in the interface of a glutamate synthase:ferredoxin complex. All interfacial mutants studied are able to form a complex under low ionic strength, but show significantly less ferredoxin-dependent activities, while still retaining enzymatic activity | Synechocystis sp. |
N1147A | ratio between the ferredoxin-dependent and the methyl viologen-dependent GOGAT activities is decreased by 47.4fold | Synechocystis sp. |
Q467A | ratio between the ferredoxin-dependent and the methyl viologen-dependent GOGAT activities is decreased by 5.5fold | Synechocystis sp. |
R1162A | ratio between the ferredoxin-dependent and the methyl viologen-dependent GOGAT activities is decreased by 4.7fold | Synechocystis sp. |
W676A | ratio between the ferredoxin-dependent and the methyl viologen-dependent GOGAT activities is decreased by 6.7fold | Synechocystis sp. |
W676F | ratio between the ferredoxin-dependent and the methyl viologen-dependent GOGAT activities is decreased by 7.9fold | Synechocystis sp. |
KM Value [mM] | KM Value Maximum [mM] | Substrate | Comment | Organism | Structure |
---|---|---|---|---|---|
0.0006 | - |
oxidized ferredoxin | wild-type, pH not specified in the publication, temperature not specified in the publication | Synechocystis sp. | |
0.0009 | - |
oxidized ferredoxin | mutant W676F, pH not specified in the publication, temperature not specified in the publication | Synechocystis sp. | |
0.0013 | - |
L-glutamine | wild-type, pH not specified in the publication, temperature not specified in the publication | Synechocystis sp. | |
0.0018 | - |
L-glutamine | mutant R1162A, pH not specified in the publication, temperature not specified in the publication | Synechocystis sp. | |
0.0019 | - |
2-oxoglutarate | mutant N1147A, pH not specified in the publication, temperature not specified in the publication | Synechocystis sp. | |
0.0027 | - |
L-glutamine | mutant H1144Q, pH not specified in the publication, temperature not specified in the publication | Synechocystis sp. | |
0.0028 | - |
L-glutamine | mutant Q467A, pH not specified in the publication, temperature not specified in the publication | Synechocystis sp. | |
0.0028 | - |
oxidized ferredoxin | mutant Q467A, pH not specified in the publication, temperature not specified in the publication | Synechocystis sp. | |
0.0032 | - |
oxidized ferredoxin | mutant H1144Q, pH not specified in the publication, temperature not specified in the publication | Synechocystis sp. | |
0.0044 | - |
oxidized ferredoxin | mutant N1147A, pH not specified in the publication, temperature not specified in the publication | Synechocystis sp. | |
0.0056 | - |
oxidized ferredoxin | mutant R1162A, pH not specified in the publication, temperature not specified in the publication | Synechocystis sp. | |
0.0071 | - |
oxidized ferredoxin | mutant W676A, pH not specified in the publication, temperature not specified in the publication | Synechocystis sp. | |
0.0194 | - |
L-glutamine | mutant N1147A, pH not specified in the publication, temperature not specified in the publication | Synechocystis sp. | |
0.023 | - |
L-glutamine | mutant W676A, pH not specified in the publication, temperature not specified in the publication | Synechocystis sp. | |
0.04 | - |
2-oxoglutarate | wild-type, pH not specified in the publication, temperature not specified in the publication | Synechocystis sp. | |
0.043 | - |
L-glutamine | mutant W676F, pH not specified in the publication, temperature not specified in the publication | Synechocystis sp. | |
0.051 | - |
2-oxoglutarate | mutant Q467A, pH not specified in the publication, temperature not specified in the publication | Synechocystis sp. | |
0.112 | - |
2-oxoglutarate | mutant H1144Q, pH not specified in the publication, temperature not specified in the publication | Synechocystis sp. | |
0.125 | - |
2-oxoglutarate | mutant R1162A, pH not specified in the publication, temperature not specified in the publication | Synechocystis sp. | |
0.128 | - |
2-oxoglutarate | mutant W676A, pH not specified in the publication, temperature not specified in the publication | Synechocystis sp. | |
0.51 | - |
2-oxoglutarate | mutant W676F, pH not specified in the publication, temperature not specified in the publication | Synechocystis sp. |
Organism | UniProt | Comment | Textmining |
---|---|---|---|
Synechocystis sp. | P55037 | isoform GltB | - |
Substrates | Comment Substrates | Organism | Products | Comment (Products) | Rev. | Reac. |
---|---|---|---|---|---|---|
2 L-glutamate + 2 oxidized ferredoxin | - |
Synechocystis sp. | L-glutamine + 2-oxoglutarate + 2 reduced ferredoxin + 2 H+ | - |
? | |
L-glutamine + 2-oxoglutarate + reduced methyl viologen + H+ | - |
Synechocystis sp. | L-glutamate + oxidized methyl viologen | - |
? |
Synonyms | Comment | Organism |
---|---|---|
gltB | - |
Synechocystis sp. |
Cofactor | Comment | Organism | Structure |
---|---|---|---|
Ferredoxin | 1:2 molar ratio between the wild-type glutamate synthase and ferredoxin | Synechocystis sp. |