Methanofuran describes a family of chemical compounds found in methanogenic archaea. These species feature a 2-aminomethylfuran linked to phenoxy group. At least three different end groups are recognized: R = tricarboxyheptanoyl (methanofuran), glutamyl-glutamyl (methanofuran b), tricarboxy-2-hydroxyheptanoyl (methanofuran c, see picture).
Formylation of MFR
Methanofuran converts to formylmethanofuran in an early stage of methanogenesis. The enzyme formylmethanofuran dehydrogenase (EC: 126.96.36.199) formylates methanofuran using CO2, the primary C1 source in methanogenesis.
Deformylation of MFR
The enzyme formylmethanofuran:tetrahydromethanopterin formyltransferase catalyzes the transfer of the formyl group from formylmethanofuran to N5 on tetrahydromethanopterin, H4MPT. This enzyme has been crystallized; it contains no prosthetic group.
- Thauer, R. K., "Biochemistry of methanogenesis: a tribute to Marjory Stephenson", Microbiology, 1998, 144, 2377-2406.
- Vorholt, J.A.; Thauer, R.K. “The Active Species of 'CO2' Utilized by Formylmethanofuran Dehydrogenase from Methanogenic Archaea” European Journal of Biochemistry 1997, volume 248, pages 919-24.
- Acharya, P.; Warkentin, E.; Ermler, U.; Thauer, R. K. and Shima, S., "The Structure of Formylmethanofuran:Tetrahydromethanopterin Formyltransferase in Complex with its Coenzymes", Journal of Molecular Biology, 2006, 357, 870-879.
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|biochemicalsMajor families of|
|Peptides | Amino acids | Nucleic acids | Carbohydrates | Nucleotide sugars | Lipids | Terpenes | Carotenoids | Tetrapyrroles | Enzyme cofactors | Steroids | Flavonoids | Alkaloids | Polyketides | Glycosides|
|Analogues of nucleic acids:||Types of enzyme cofactors||Analogues of nucleic acids:|
|Coenzymes||NAD+ | NADP+ | Coenzyme A | Tetrahydrofolic acid | Menaquinone | Ascorbic acid | Coenzyme F420 | Adenosine triphosphate | S-Adenosyl methionine | 3'-Phosphoadenosine-5'-phosphosulfate | Coenzyme Q | Tetrahydrobiopterin | Cytidine triphosphate | Glutathione | Coenzyme M | Coenzyme B | Methanofuran | Tetrahydromethanopterin|
|Organic groups:||Flavin mononucleotide | Flavin adenine dinucleotide | Pyrroloquinoline quinone | Pyridoxal phosphate | Biotin | Methylcobalamin | Cobamamide | Thiamine pyrophosphate | Heme | Molybdopterin | Lipoic acid|
|Metals:||Calcium | Copper | Iron | Magnesium | Manganese | Nickel | Zinc|