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Literature summary for 2.4.1.232 extracted from
- Saccharomyces cerevisiae alpha1,6-mannosyltransferase has a catalytic potential to transfer a second mannose molecule (2006), FEBS J., 273, 5074-5085.
Cloned(Commentary)
| Cloned (Comment) | Organism |
|---|---|
| recombinant Och1p is expressed in Pichia pastoris as a secreted protein, after truncation of its transmembrane region and fusion with myc and histidine tags at the C-terminus | Saccharomyces cerevisiae |
Metals/Ions
| Metals/Ions | Comment | Organism | Structure |
|---|---|---|---|
| Mn2+ | no activity without addition of Mn2+ | Saccharomyces cerevisiae |  |
Natural Substrates/ Products (Substrates)
| Natural Substrates | Organism | Comment (Nat. Sub.) | Natural Products | Comment (Nat. Pro.) | Rev. | Reac. |
|---|---|---|---|---|---|---|
| additional information | Saccharomyces cerevisiae | the N-linked oligosaccharide modification in the Golgi apparatus is initiated by alpha1,6-mannosyltransferase (encoded by the OCH1 gene) with the addition of mannose to the Man8GlcNAc2 or Man9GlcNAc2 endoplasmic reticulum intermediates | ? | - |
? | |
Organism
| Organism | UniProt | Comment | Textmining |
|---|---|---|---|
| Saccharomyces cerevisiae | - |
- |
- |
Purification (Commentary)
| Purification (Comment) | Organism |
|---|---|
| recombinant enzyme | Saccharomyces cerevisiae |
Substrates and Products (Substrate)
| Substrates | Comment Substrates | Organism | Products | Comment (Products) | Rev. | Reac. |
|---|---|---|---|---|---|---|
| alpha-D-mannose + Manalpha(1,6)[Manalpha(1,3)]Manalpha(1,6)[Manalpha(1,2)Manalpha(1,2)Manalpha(1,3)]Manbeta(1,4)GlcNAcbeta(1,4)GlcNAc-pyridylamine | recombinant enzyme shows 28.8% of the activity with Manalpha(1,2)Manalpha(1,6)[Manalpha(1,3)]Manalpha(1,6)[Manalpha(1,2)Manalpha(1,2)Manalpha(1,3)]Manbeta(1,4)GLcNAcbeta(1,4)GlcNAc-pyridylamine | Saccharomyces cerevisiae | ? | - |
? | |
| GDP-mannose + Manalpha(1,2)Manalpha(1,6)[Manalpha(1,2)Manalpha(1,3)]Manalpha(1,6)[Manalpha(1,2)Manalpha(1,2)Manalpha(1,3)]Manbeta(1,4)GlcNAcbeta(1,4)GlcNAc-pyridylamine | recombinant enzyme shows 74.2% of the activity with Manalpha(1,2)Manalpha(1,6)[Manalpha(1,3)]Manalpha(1,6)[Manalpha(1,2)Manalpha(1,2)Manalpha(1,3)]Manbeta(1,4)GLcNAcbeta(1,4)GlcNAc-pyridylamine. Och1p has the catalytic potential to transfer two molecules of mannose to Manalpha(1,2)Manalpha(1,6)[Manalpha(1,2)Manalpha(1,3)]Manalpha(1,6)[Manalpha(1,2)Manalpha(1,2)Manalpha(1,3)]Manbeta(1,4)GlcNAcbeta(1,4)GlcNAc-pyridylamine. The second mannose is attached with alpha1,6-linkage to either the alpha1,6-linked or the alpha1,3-linked mannose that is attached to alpha1,6-linked mannose | Saccharomyces cerevisiae | ? | - |
? | |
| GDP-mannose + Manalpha(1,2)Manalpha(1,6)[Manalpha(1,2)Manalpha(1,3)]Manalpha(1,6)[Manalpha(1,2)Manalpha(1,3)]Manbeta(1,4)GlcNAcbeta(1,4)GlcNAc-pyridylamine | recombinant enzyme shows 58.5% of the activity with Manalpha(1,2)Manalpha(1,6)[Manalpha(1,3)]Manalpha(1,6)[Manalpha(1,2)Manalpha(1,2)Manalpha(1,3)]Manbeta(1,4)GLcNAcbeta(1,4)GlcNAc-pyridylamine | Saccharomyces cerevisiae | ? | - |
? | |
| GDP-mannose + Manalpha(1,2)Manalpha(1,6)[Manalpha(1,3)]Manalpha(1,6)[Manalpha(1,2)Manalpha(1,2)Manalpha(1,3)]Manbeta(1,4)GlcNAcbeta(1,4)GlcNAc-pyridylamine | - |
Saccharomyces cerevisiae | ? | - |
? | |
| GDP-mannose + Manalpha(1,2)Manalpha(1,6)[Manalpha(1,3)]Manalpha(1,6)[Manalpha(1,2)Manalpha(1,3)]Manbeta(1,4)GlcNAcbeta(1,4)GlcNAc-pyridylamine | recombinant enzyme shows 66.1% of the activity with Manalpha(1,2)Manalpha(1,6)[Manalpha(1,3)]Manalpha(1,6)[Manalpha(1,2)Manalpha(1,2)Manalpha(1,3)]Manbeta(1,4)GLcNAcbeta(1,4)GlcNAc-pyridylamine | Saccharomyces cerevisiae | ? | - |
? | |
| GDP-mannose + Manalpha(1,6)[Manalpha(1,2)Manalpha(1,3)]Manalpha(1,6)[Manalpha(1,2)Manalpha(1,2)Manalpha(1,3)]Manbeta(1,4)GlcNAcbeta(1,4)GlcNAc-pyridylamine | recombinant enzyme shows 28.8% of the activity with Manalpha(1,2)Manalpha(1,6)[Manalpha(1,3)]Manalpha(1,6)[Manalpha(1,2)Manalpha(1,2)Manalpha(1,3)]Manbeta(1,4)GLcNAcbeta(1,4)GlcNAc-pyridylamine | Saccharomyces cerevisiae | ? | - |
? | |
| GDP-mannose + Manalpha(1,6)[Manalpha(1,2)Manalpha(1,3)]Manalpha(1,6)[Manalpha(1,2)Manalpha(1,3)]Manbeta(1,4)GlcNAcbeta(1,4)GlcNAc-pyridylamine | recombinant enzyme shows 14.4% of the activity with Manalpha(1,2)Manalpha(1,6)[Manalpha(1,3)]Manalpha(1,6)[Manalpha(1,2)Manalpha(1,2)Manalpha(1,3)]Manbeta(1,4)GLcNAcbeta(1,4)GlcNAc-pyridylamine | Saccharomyces cerevisiae | ? | - |
? | |
| GDP-mannose + Manalpha(1,6)[Manalpha(1,3)]Manalpha(1,6)[Manalpha(1,2)Manalpha(1,3)]Manbeta(1,4)GlcNAcbeta(1,4)GlcNAc-pyridylamine | recombinant enzyme shows 14.4% of the activity with Manalpha(1,2)Manalpha(1,6)[Manalpha(1,3)]Manalpha(1,6)[Manalpha(1,2)Manalpha(1,2)Manalpha(1,3)]Manbeta(1,4)GLcNAcbeta(1,4)GlcNAc-pyridylamine | Saccharomyces cerevisiae | ? | - |
? | |
| additional information | the N-linked oligosaccharide modification in the Golgi apparatus is initiated by alpha1,6-mannosyltransferase (encoded by the OCH1 gene) with the addition of mannose to the Man8GlcNAc2 or Man9GlcNAc2 endoplasmic reticulum intermediates | Saccharomyces cerevisiae | ? | - |
? | |
| additional information | Och1p has the potential to transfer two mannoses from GDP-mannose | Saccharomyces cerevisiae | ? | - |
? | |
pH Optimum
| pH Optimum Minimum | pH Optimum Maximum | Comment | Organism |
|---|---|---|---|
| 7.5 | - |
recombinant enzyme | Saccharomyces cerevisiae |
pH Range
| pH Minimum | pH Maximum | Comment | Organism |
|---|---|---|---|
| 6.5 | 8.5 | the recombinant Och1p in Tris/malate buffer exhibits above 80% of maximum activity between pH 6.5 and pH 8.5 | Saccharomyces cerevisiae |
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