EC Number | Cloned (Comment) | Organism |
---|---|---|
5.4.99.13 | gene icmF, recombinant expression of N-terminally His-tagged IcmF | Cupriavidus metallidurans |
EC Number | Crystallization (Comment) | Organism |
---|---|---|
5.4.99.13 | purified enzyme in complex with four different substrates, GDP and isovaleryl-CoA, or isobutyryl-CoA or n-butytryl-CoA or pivalyl-CoA, hanging drop vapor diffusion technique, mixing of 0.001 ml of 11.7 mg/ml IcmF protein in 100 mM NaCl, 50 mM HEPES, pH 7.5, 1 mM GDP, 3 mM MgCl2, 0.3 mM AdoCbl, with 0.001 ml of reservoir solution containing 0.7-0.75 M potassium sodium tartrate, 0.2 M ammonium acetate, 0.1 M imidazole, pH 7.0-7.7, and 3% v/v ethylene glycol, and equilibration against 0.5 ml reservoir solution, 3-6 weeks, at 25°C, X-ray diffraction structure determination and analysis at 3.4-3.5 A resolution | Cupriavidus metallidurans |
EC Number | Metals/Ions | Comment | Organism | Structure |
---|---|---|---|---|
5.4.99.13 | Mg2+ | required | Cupriavidus metallidurans |
EC Number | Natural Substrates | Organism | Comment (Nat. Sub.) | Natural Products | Comment (Nat. Pro.) | Rev. | Reac. |
---|---|---|---|---|---|---|---|
5.4.99.13 | 2-methylpropanoyl-CoA | Cupriavidus metallidurans | interconversion | butanoyl-CoA | - |
r | |
5.4.99.13 | 2-methylpropanoyl-CoA | Cupriavidus metallidurans ATCC 43123 | interconversion | butanoyl-CoA | - |
r |
EC Number | Organism | UniProt | Comment | Textmining |
---|---|---|---|---|
5.4.99.13 | Cupriavidus metallidurans | Q1LRY0 | - |
- |
5.4.99.13 | Cupriavidus metallidurans ATCC 43123 | Q1LRY0 | - |
- |
EC Number | Purification (Comment) | Organism |
---|---|---|
5.4.99.13 | recombinant N-terminally His-tagged | Cupriavidus metallidurans |
EC Number | Substrates | Comment Substrates | Organism | Products | Comment (Products) | Rev. | Reac. |
---|---|---|---|---|---|---|---|
5.4.99.13 | 2-methylpropanoyl-CoA | interconversion | Cupriavidus metallidurans | butanoyl-CoA | - |
r | |
5.4.99.13 | 2-methylpropanoyl-CoA | interconversion | Cupriavidus metallidurans ATCC 43123 | butanoyl-CoA | - |
r | |
5.4.99.13 | isovaleryl-CoA | - |
Cupriavidus metallidurans | pivalyl-CoA | - |
r | |
5.4.99.13 | isovaleryl-CoA | - |
Cupriavidus metallidurans ATCC 43123 | pivalyl-CoA | - |
r | |
5.4.99.13 | additional information | enzyme substrate specificity, active site architecture and determinants of substrate specificity, comparison of the substrate-bound structures to that of substrate-free holo-IcmF-GDP, overview. Acyl-CoA substrates are threaded through the TIM barrel substrate-binding domain | Cupriavidus metallidurans | ? | - |
? | |
5.4.99.13 | additional information | enzyme substrate specificity, active site architecture and determinants of substrate specificity, comparison of the substrate-bound structures to that of substrate-free holo-IcmF-GDP, overview. Acyl-CoA substrates are threaded through the TIM barrel substrate-binding domain | Cupriavidus metallidurans ATCC 43123 | ? | - |
? |
EC Number | Subunits | Comment | Organism |
---|---|---|---|
5.4.99.13 | dimer | - |
Cupriavidus metallidurans |
EC Number | Synonyms | Comment | Organism |
---|---|---|---|
5.4.99.13 | adenosylcobalamin-dependent isobutyryl-CoA mutase | - |
Cupriavidus metallidurans |
5.4.99.13 | IcmF | - |
Cupriavidus metallidurans |
5.4.99.13 | PCM | - |
Cupriavidus metallidurans |
EC Number | Cofactor | Comment | Organism | Structure |
---|---|---|---|---|
5.4.99.13 | 5'-deoxyadenosylcobalamin | AdoCbl, required, two conformations: C3'-endo and C2'-endo, conformational change of the 5'-deoxyadenosyl group from C2'-endo to C3'-endo contributes to initiation of catalysis. Adenosylcobalamin (coenzyme B12) is an organometallic enzyme cofactor for radical chemistry. Its reactivity is based on a unique covalent cobalt-carbon (Co-C) bond that is sufficiently weak to allow for reversible homolytic cleavage in enzyme active sites, generating a 5'-deoxyadenosyl radical in the presence of an appropriate substrate. The radical can then abstract a substrate hydrogen atom and initiate difficult chemical transformations | Cupriavidus metallidurans |
EC Number | General Information | Comment | Organism |
---|---|---|---|
5.4.99.13 | additional information | enzyme IcmF in general is a fusion between the radical B12 enzyme isobutyryl-CoA mutase and its G-protein chaperone. IcmF from Cupriavidus metallidurans, which also contains a G-protein domain in addition to the mutase domains, with AdoCbl in the ICM active site and GDP-Mg2+ in the G-protein active site (holo-IcmF-GDP) | Cupriavidus metallidurans |