Enzymes
| UniProtKB help_outline | 6 proteins |
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| GO Molecular Function help_outline |
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- Name help_outline precorrin-4 Identifier CHEBI:57769 Charge -8 Formula C44H44N4O17 InChIKeyhelp_outline IOBDBIPWYQGVMM-VLMJWMIZSA-F SMILEShelp_outline CC(=O)C12N\C(=C/C3=NC(Cc4[nH]c(CC5=NC1=C(CC([O-])=O)[C@@]5(C)CCC([O-])=O)c(CCC([O-])=O)c4CC([O-])=O)=C(CCC([O-])=O)[C@]3(C)CC([O-])=O)[C@@H](CCC([O-])=O)[C@]2(C)CC([O-])=O 2D coordinates Mol file for the small molecule Search links Involved in 2 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
- Name help_outline S-adenosyl-L-methionine Identifier CHEBI:59789 Charge 1 Formula C15H23N6O5S InChIKeyhelp_outline MEFKEPWMEQBLKI-AIRLBKTGSA-O SMILEShelp_outline C[S+](CC[C@H]([NH3+])C([O-])=O)C[C@H]1O[C@H]([C@H](O)[C@@H]1O)n1cnc2c(N)ncnc12 2D coordinates Mol file for the small molecule Search links Involved in 868 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
- Name help_outline precorrin-5 Identifier CHEBI:77871 Charge -7 Formula C45H47N4O17 InChIKeyhelp_outline OUPXZNRNMLYOGK-FNFWWFRLSA-G SMILEShelp_outline CC(=O)C12N\C(=C/C3=[NH+]C(C[C@]4(C)N=C(CC5=NC1=C(CC([O-])=O)[C@@]5(C)CCC([O-])=O)C(CCC([O-])=O)=C4CC([O-])=O)=C(CCC([O-])=O)[C@]3(C)CC([O-])=O)[C@@H](CCC([O-])=O)[C@]2(C)CC([O-])=O 2D coordinates Mol file for the small molecule Search links Involved in 2 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
- Name help_outline S-adenosyl-L-homocysteine Identifier CHEBI:57856 Charge 0 Formula C14H20N6O5S InChIKeyhelp_outline ZJUKTBDSGOFHSH-WFMPWKQPSA-N SMILEShelp_outline Nc1ncnc2n(cnc12)[C@@H]1O[C@H](CSCC[C@H]([NH3+])C([O-])=O)[C@@H](O)[C@H]1O 2D coordinates Mol file for the small molecule Search links Involved in 792 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
Cross-references
| RHEA:22012 | RHEA:22013 | RHEA:22014 | RHEA:22015 | |
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| Reaction direction help_outline | undefined | left-to-right | right-to-left | bidirectional |
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Publications
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Genetic and sequence analysis of an 8.7-kilobase Pseudomonas denitrificans fragment carrying eight genes involved in transformation of precorrin-2 to cobyrinic acid.
Crouzet J., Cameron B., Cauchois L., Rigault S., Rouyez M.-C., Blanche F., Thibaut D., Debussche L.
A 8.7-kilobase DNA fragment carrying Pseudomonas denitrificans cob genes has been sequenced. The nucleotide sequence and the genetic analysis revealed that this fragment carries eight different cob genes (cobF to cobM). Six of these genes have the characteristics of translationally coupled genes. ... >> More
A 8.7-kilobase DNA fragment carrying Pseudomonas denitrificans cob genes has been sequenced. The nucleotide sequence and the genetic analysis revealed that this fragment carries eight different cob genes (cobF to cobM). Six of these genes have the characteristics of translationally coupled genes. cobI has been identified as S-adenosyl-L-methionine (SAM):precorrin-2 methyltransferase structural gene because the encoded protein has the same NH2 terminus and molecular weight as those of the purified enzyme. From protein homology with CobA and CobI, two SAM-dependent methyltransferases of the cobalamin pathway, it is proposed that cobF, cobJ, cobL, and cobM code for other methyltransferases involved in the cobalamin pathway. In addition, purified CobF protein has affinity for SAM, as expected for a SAM-dependent methyltransferase. Accumulation of cobalamin precursors in Agrobacterium tumefaciens mutants complemented by any of these eight genes suggest that, apart from cobI, whose function is identified, the products of all these genes are implicated in the conversion of precorrin-3 into cobyrinic acid. << Less
J. Bacteriol. 172:5980-5990(1990) [PubMed] [EuropePMC]
This publication is cited by 1 other entry.
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Characterization of the cobalamin (vitamin B12) biosynthetic genes of Salmonella typhimurium.
Roth J.R., Lawrence J.G., Rubenfield M., Kieffer-Higgins S., Church G.M.
Salmonella typhimurium synthesizes cobalamin (vitamin B12) de novo under anaerobic conditions. Of the 30 cobalamin synthetic genes, 25 are clustered in one operon, cob, and are arranged in three groups, each group encoding enzymes for a biochemically distinct portion of the biosynthetic pathway. W ... >> More
Salmonella typhimurium synthesizes cobalamin (vitamin B12) de novo under anaerobic conditions. Of the 30 cobalamin synthetic genes, 25 are clustered in one operon, cob, and are arranged in three groups, each group encoding enzymes for a biochemically distinct portion of the biosynthetic pathway. We have determined the DNA sequence for the promoter region and the proximal 17.1 kb of the cob operon. This sequence includes 20 translationally coupled genes that encode the enzymes involved in parts I and III of the cobalamin biosynthetic pathway. A comparison of these genes with the cobalamin synthetic genes from Pseudomonas denitrificans allows assignment of likely functions to 12 of the 20 sequenced Salmonella genes. Three additional Salmonella genes encode proteins likely to be involved in the transport of cobalt, a component of vitamin B12. However, not all Salmonella and Pseudomonas cobalamin synthetic genes have apparent homologs in the other species. These differences suggest that the cobalamin biosynthetic pathways differ between the two organisms. The evolution of these genes and their chromosomal positions is discussed. << Less