EC Number | General Stability | Organism |
---|---|---|
2.3.1.45 | activity is stable to the first cycle of freezing, cannot be refrozen after thawing | Bos taurus |
EC Number | Inhibitors | Comment | Organism | Structure |
---|---|---|---|---|
2.3.1.45 | diethyl dicarbonate | - |
Bos taurus | |
2.3.1.45 | N-bromosuccinimide | - |
Bos taurus | |
2.3.1.45 | Triton X-100 | above 0.02% | Bos taurus |
EC Number | Natural Substrates | Organism | Comment (Nat. Sub.) | Natural Products | Comment (Nat. Pro.) | Rev. | Reac. |
---|---|---|---|---|---|---|---|
2.3.1.44 | acetyl-CoA + N-acetylneuraminate | Equus caballus | - |
CoA + N-acetyl-4-O-acetylneuraminate | - |
? | |
2.3.1.45 | acetyl-CoA + sialic acid | Bos taurus | - |
CoA + N-acetyl-7-O(or 9-O-)-acetylneuraminate | - |
? |
EC Number | Organism | UniProt | Comment | Textmining |
---|---|---|---|---|
2.3.1.44 | Equus caballus | - |
- |
- |
2.3.1.45 | Bos taurus | - |
ox | - |
EC Number | Source Tissue | Comment | Organism | Textmining |
---|---|---|---|---|
2.3.1.44 | submaxillary gland | - |
Equus caballus | - |
2.3.1.45 | submaxillary gland | - |
Bos taurus | - |
EC Number | Substrates | Comment Substrates | Organism | Products | Comment (Products) | Rev. | Reac. |
---|---|---|---|---|---|---|---|
2.3.1.44 | acetyl-CoA + N-acetylneuraminate | - |
Equus caballus | CoA + N-acetyl-4-O-acetylneuraminate | - |
? | |
2.3.1.45 | acetyl-CoA + N-acetylneuraminate | - |
Bos taurus | CoA + N-acetyl-7-O(or 9-O-)-acetylneuraminate | - |
? | |
2.3.1.45 | acetyl-CoA + sialic acid | - |
Bos taurus | CoA + N-acetyl-7-O(or 9-O-)-acetylneuraminate | - |
? |
EC Number | Synonyms | Comment | Organism |
---|---|---|---|
2.3.1.45 | More | in early days of investigation of sialate O-acetyltransferase it was not possible to discriminate clearly between 7- or 9-O-acetylated sialic acids enzymatically formed on a micro scale in order to denominate the enzyme correctly, there also exists the possibility of the existence of more than one O-acetyltransferases incorporating acetyl-groups into different positions of the sialic acid side chain, in contrast a hypothesis is presented for the requirement of only one transferase specific for the 7-OH group, after insertion of the O-acetyl group at O-7 the ester residue may migrate to O-9 afterwards a second O-acetyl group can be transferred by the same enzyme to O-7, which may migrate to O-8 and open the way for linking a third acetyl group to O-7 | Bos taurus |
EC Number | Temperature Stability Minimum [°C] | Temperature Stability Maximum [°C] | Comment | Organism |
---|---|---|---|---|
2.3.1.45 | 22 | - |
50% loss of activity after 20 min at room temperature | Bos taurus |
2.3.1.45 | 37 | - |
activity is very labile | Bos taurus |