Enzymes
UniProtKB help_outline | 4 proteins |
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- Name help_outline precorrin-6B Identifier CHEBI:58532 Charge -6 Formula C44H50N4O16 InChIKeyhelp_outline NWRSYSRVTYBWJV-WFECKALKSA-H SMILEShelp_outline C[C@@]12CC3=C(CCC([O-])=O)[C@](C)(CC([O-])=O)C(/C=C4\[NH2+][C@@](C)([C@@H]5N=C(\C=C([NH2+]1)\C(CCC([O-])=O)=C2CC([O-])=O)[C@](C)(CCC([O-])=O)[C@H]5CC([O-])=O)[C@@](C)(CC([O-])=O)[C@@H]4CCC([O-])=O)=N3 2D coordinates Mol file for the small molecule Search links Involved in 3 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 904 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
- Name help_outline precorrin-8X Identifier CHEBI:58581 Charge -7 Formula C45H53N4O14 InChIKeyhelp_outline IGCZFSMEIXUSJY-FKUSVXTQSA-G SMILEShelp_outline CC1C2=N[C@@](C)(CC3=N\C(=C(C)/C4=N[C@@](C)([C@@H]5N=C1[C@](C)(CCC([O-])=O)[C@H]5CC([O-])=O)[C@@](C)(CC([O-])=O)[C@@H]4CCC([O-])=O)[C@@](C)(CC([O-])=O)[C@@H]3CCC([O-])=O)C(C)=C2CCC([O-])=O 2D coordinates Mol file for the small molecule Search links Involved in 3 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 827 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
- Name help_outline CO2 Identifier CHEBI:16526 (CAS: 124-38-9) help_outline Charge 0 Formula CO2 InChIKeyhelp_outline CURLTUGMZLYLDI-UHFFFAOYSA-N SMILEShelp_outline O=C=O 2D coordinates Mol file for the small molecule Search links Involved in 1,006 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
- Name help_outline H+ Identifier CHEBI:15378 Charge 1 Formula H InChIKeyhelp_outline GPRLSGONYQIRFK-UHFFFAOYSA-N SMILEShelp_outline [H+] 2D coordinates Mol file for the small molecule Search links Involved in 9,521 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
Cross-references
RHEA:17477 | RHEA:17478 | RHEA:17479 | RHEA:17480 | |
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Publications
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An enzyme-trap approach allows isolation of intermediates in cobalamin biosynthesis.
Deery E., Schroeder S., Lawrence A.D., Taylor S.L., Seyedarabi A., Waterman J., Wilson K.S., Brown D., Geeves M.A., Howard M.J., Pickersgill R.W., Warren M.J.
The biosynthesis of many vitamins and coenzymes has often proven difficult to elucidate owing to a combination of low abundance and kinetic lability of the pathway intermediates. Through a serial reconstruction of the cobalamin (vitamin B(12)) pathway in Escherichia coli and by His tagging the ter ... >> More
The biosynthesis of many vitamins and coenzymes has often proven difficult to elucidate owing to a combination of low abundance and kinetic lability of the pathway intermediates. Through a serial reconstruction of the cobalamin (vitamin B(12)) pathway in Escherichia coli and by His tagging the terminal enzyme in the reaction sequence, we have observed that many unstable intermediates can be isolated as tightly bound enzyme-product complexes. Together, these approaches have been used to extract intermediates between precorrin-4 and hydrogenobyrinic acid in their free acid form and permitted the delineation of the overall reaction catalyzed by CobL, including the formal elucidation of precorrin-7 as a metabolite. Furthermore, a substrate-carrier protein, CobE, that can also be used to stabilize some of the transient metabolic intermediates and enhance their onward transformation, has been identified. The tight association of pathway intermediates with enzymes provides evidence for a form of metabolite channeling. << Less
Nat Chem Biol 8:933-940(2012) [PubMed] [EuropePMC]
This publication is cited by 2 other entries.
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Biosynthesis of vitamin B12 in Pseudomonas denitrificans: the biosynthetic sequence from precorrin-6y to precorrin-8x is catalyzed by the cobL gene product.
Blanche F., Famechon A., Thibaut D., Debussche L., Cameron B., Crouzet J.
A protein catalyzing methylation at C-5 and C-15 and decarboxylation of the acetic acid side chain at C-12 on precorrin-6y to yield precorrin-8x was purified to homogeneity from a recombinant strain of Pseudomonas denitrificans. It was sequenced at the N terminus and shown to be encoded by the cob ... >> More
A protein catalyzing methylation at C-5 and C-15 and decarboxylation of the acetic acid side chain at C-12 on precorrin-6y to yield precorrin-8x was purified to homogeneity from a recombinant strain of Pseudomonas denitrificans. It was sequenced at the N terminus and shown to be encoded by the cobL gene. << Less
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The crystal structure of MT0146/CbiT suggests that the putative precorrin-8w decarboxylase is a methyltransferase.
Keller J.P., Smith P.M., Benach J., Christendat D., deTitta G.T., Hunt J.F.
The CbiT and CbiE enzymes participate in the biosynthesis of vitamin B12. They are fused together in some organisms to form a protein called CobL, which catalyzes two methylations and one decarboxylation on a precorrin intermediate. Because CbiE has sequence homology to canonical precorrin methylt ... >> More
The CbiT and CbiE enzymes participate in the biosynthesis of vitamin B12. They are fused together in some organisms to form a protein called CobL, which catalyzes two methylations and one decarboxylation on a precorrin intermediate. Because CbiE has sequence homology to canonical precorrin methyltransferases, CbiT was hypothesized to catalyze the decarboxylation. We herein present the crystal structure of MT0146, the CbiT homolog from Methanobacterium thermoautotrophicum. The protein shows structural similarity to Rossmann-like S-adenosyl-methionine-dependent methyltransferases, and our 1.9 A cocrystal structure shows that it binds S-adenosyl-methionine in standard geometry near a binding pocket that could accommodate a precorrin substrate. Therefore, MT0146/CbiT probably functions as a precorrin methyltransferase and represents the first enzyme identified with this activity that does not have the canonical precorrin methyltransferase fold. << Less
Structure 10:1475-1487(2002) [PubMed] [EuropePMC]
This publication is cited by 2 other entries.
Comments
Multi-step reaction: RHEA:35383 and RHEA:35387.