Application | Comment | Organism |
---|---|---|
synthesis | expression of the full length of human UBE1 in Escherichia coli and purification by Ni-NTA superflow sepharose and strep-tactin sepharose which is based on UB-UBE1 high-energy thioester bonded intermediate complex. Purified UBE1 can activate and conjugate UB to ubiquitin-conjugating enzyme E2s | Homo sapiens |
Cloned (Comment) | Organism |
---|---|
expression in Escherichia coli | Homo sapiens |
full length of human UBE1 is expressed in Escherichia coli via pET28b vector | Homo sapiens |
Molecular Weight [Da] | Molecular Weight Maximum [Da] | Comment | Organism |
---|---|---|---|
117000 | - |
x * 117000, SDS-PAGE | Homo sapiens |
118000 | - |
SDS-PAGE | Homo sapiens |
Organism | UniProt | Comment | Textmining |
---|---|---|---|
Homo sapiens | - |
- |
- |
Homo sapiens | Q712V1 | - |
- |
Purification (Comment) | Organism |
---|---|
recombinant enzyme, purification on Ni-NTA superflow sepharose and strep-tactin sepharose which is based on UB-UBE1 high-energy thioester bonded intermediate complex | Homo sapiens |
recombinant protein | Homo sapiens |
recombinant protein is purified by Ni-NTA His-Bind Superflow Sepharose and Strep-Tactin Sepahrose | Homo sapiens |
Reaction | Comment | Organism | Reaction ID |
---|---|---|---|
ATP + ubiquitin + [E1 ubiquitin-activating enzyme]-L-cysteine = AMP + diphosphate + S-ubiquitinyl-[E1 ubiquitin-activating enzyme]-L-cysteine | ATP-dependant formation of C-S thioester bond between the C-terminal glycine of ubiquitin and a sulfhydryl side group of a cysteine residue on the E1 protein | Homo sapiens |
Substrates | Comment Substrates | Organism | Products | Comment (Products) | Rev. | Reac. |
---|---|---|---|---|---|---|
ATP + ubiquitin + [6His-ubiquitin-activating enzyme E1]W-8His-Strep-HA | Strep, i.e.WSHPQFEK, HA, i.e. YPYDVPDYAS, under non-reducing conditions, the intermediate complex of the thioester formation is not observed without ATP | Homo sapiens | AMP + diphosphate + [6His-ubiquitin-activating enzyme E1]W-8His-Strep-HA-ubiquitinyl-L-cysteine | - |
? | |
ATP + ubiquitin + [ubiquitin-activating protein UBE1]-L-cysteine | - |
Homo sapiens | AMP + diphosphate + [ubiquitin-activating protein UBE1]-S-ubiquitinyl-L-cysteine | - |
? | |
additional information | the thioester formation assay is performed using recombinant proteins expressed in Escherichia coli. The activation of ubiquitin by purified UBE1 is identified in vitro by SDS-PAGE | Homo sapiens | ? | - |
? | |
additional information | purified isoform UBE1 can activate and conjugate ubiquitin to ubiquitin-conjugating enzyme E2s. Transfer is restricted to distinct E2 isoforms UB2R2, UBE2W and UBE2NL | Homo sapiens | ? | - |
? |
Subunits | Comment | Organism |
---|---|---|
? | x * 117000, SDS-PAGE | Homo sapiens |
Synonyms | Comment | Organism |
---|---|---|
UBE1 | - |
Homo sapiens |
ubiquitin-activating enzyme, UBE1 | - |
Homo sapiens |
Temperature Optimum [°C] | Temperature Optimum Maximum [°C] | Comment | Organism |
---|---|---|---|
37 | - |
assay at | Homo sapiens |
pH Optimum Minimum | pH Optimum Maximum | Comment | Organism |
---|---|---|---|
7.5 | - |
assay at | Homo sapiens |
General Information | Comment | Organism |
---|---|---|
physiological function | plays an important role in the first step of the proteasome pathway to activate ubiquitin. The UBE1 is a two-step intramolecular and ATP-dependent reaction to generate a high-energy E1-thiol-ester-ubiquitin intermediate. The activated ubiquitin are then transferred to ubiquitin-conjugating enzyme E2 | Homo sapiens |