1.12.98.2: 5,10-methenyltetrahydromethanopterin hydrogenase
This is an abbreviated version!
For detailed information about 5,10-methenyltetrahydromethanopterin hydrogenase, go to the full flat file.
Reaction
Synonyms
5,10-methylene-H4MPT dehydrogenase, Dehydrogenase, methylenetetrahydromethanopterin, EC 1.12.99.4, H2-forming methylenetetrahydromethanopterin dehydrogenase, H2-forming N5,N10-Methenyltetrahydromethanopterin dehydrogenase, Hmd, methylenetetrahydromethanopterin dehydrogenase, N5,N10-methenyltetrahydromethanopterin hydrogenase, N5,N10-Methylenetetrahydromethanopterin dehydrogenase, N5,N10-methylenetetrahydromethanopterin dehydrogenase (H2-forming)
ECTree
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Metals Ions
Metals Ions on EC 1.12.98.2 - 5,10-methenyltetrahydromethanopterin hydrogenase
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Fe
Iron
KCl
-
the enzyme requires the presence of salts, 50% of maximal activity is reached at 100 mM potassium phosphate, KCl or NaCl
NaCl
-
the enzyme requires the presence of salts, 50% of maximal activity is reached at 100 mM potassium phosphate, KCl or NaCl
Nickel
-
contains less than 0.1 mol Ni per mol of enzyme
potassium phosphate
-
the enzyme requires the presence of salts, 50% of maximal activity is reached at 100 mM potassium phosphate, KCl or NaCl
Zn2+
the zinc content varies from preparation to preparation between 0.5-4 mol zinc/mol enzyme
additional information
-
tightly binds an iron-containing cofactor. The iron is coordinated by two CO molecules, one sulphur and a pyridone derivative, which is linked via a phosphodiester bond to a guanosine base
Fe
Hmd holoenzyme is comprised of 2 iron atoms, each iron atom coordinates the reduction of methenyltetrahydromethanopterin and oxidation of H2 while bound to both Hmd and a cofactor molecule
Fe
-
tightly binds an iron-containing cofactor. The iron is coordinated by two CO molecules, one sulfur and a pyridone derivative, which is linked via a phosphodiester bond to a guanosine base
-
enzyme contains iron bound to a cofactor of unknown structure, one iron per monomer, iron is released from cofactor upon light inactivation
Iron
-
enzyme contains iron bound to a mercaptoethanol-extractable cofactor of unknown structure, one iron per monomer, iron is released from cofactor upon light inactivation
Iron
-
enzyme contains iron bound to an mercaptoethanol-extractable cofactor of unknown structure, contains intrinsic CO bound to iron
Iron
-
contains approximately 1 mol of iron per mol of enzyme
additional information
-
lack of redoxactive transition metals
additional information
the enzyme does not contain iron-sulfur clusters, nickel, or flavins
additional information
-
the enzyme does not contain nickel or iron/sulfur clusters
additional information
-
the enzyme does not contain nickel or iron/sulfur clusters