Cloned (Comment) | Organism |
---|---|
human beta-1-2-N-acetylglucosaminyltransferase (hGnT1) lacking the first 103 amino acids is expressed as a maltose binding protein (MBP) fusion protein in inclusion bodies in Escherichia coli and refolded using an oxido-shuffling method. Cloning and expression of MBP-hGnT1(D103) and mutant MBP-hGnT1 (D103) enzymes | Homo sapiens |
Protein Variants | Comment | Organism |
---|---|---|
C121A | active mutant enzyme. After 1 h, the wild-type MBP-hGnT1(D103) and C121A mutant convert more than 50% of Man5-RNAse B to RNAse B-GlcNAc2-Man5-GlcNAc | Homo sapiens |
C121D | mutant enzyme shows no transfer of GlcNAc from UDP-GlcNAc to the glycoprotein acceptor Man5-RNAse B | Homo sapiens |
C121S | active mutant enzyme. After 1 h, the C121S mutant shows less than 25% conversion of Man5-RNAse B to RNAse B-GlcNAc2-Man5-GlcNAc | Homo sapiens |
C121T | mutant enzyme shows no transfer of GlcNAc from UDP-GlcNAc to the glycoprotein acceptor Man5-RNAse B | Homo sapiens |
R120A/C121H | active mutant enzyme. The R120A/C121H mutant is less active than the wild type and the single mutants. It converts more than half of the Man5-RNAse B to RNAse B-GlcNAc2-Man5-GlcNAc | Homo sapiens |
Organism | UniProt | Comment | Textmining |
---|---|---|---|
Homo sapiens | - |
- |
- |
Substrates | Comment Substrates | Organism | Products | Comment (Products) | Rev. | Reac. |
---|---|---|---|---|---|---|
UDP-N-acetyl-D-glucosamine + Man5-RNAse B | wild type hGnT1 and mutants C121A, C121S and R120A/C121H transfer GlcNAc from UDP-GlcNAc to the glycoprotein acceptor Man5-RNAse B, whereas mutants C121T and C121D are inactive. After 1 h, the wild-type MBP-hGnT1(D103) and C121A mutant convert more than 50% of RNAse BM5 to RNAse BM5Gn, while the C121S mutant shows less than 25% conversion. The wild-type MBP-hGnT1(D103) and both C121A and C121S mutants convert RNAse BM5 nearly completely to RNAse BM5Gn following overnight incubation. The R120A/C121H mutant is less active than the wild-type and the single mutants. It converts more than half of the RNAse BM5 into RNAse BM5Gn after 17 h | Homo sapiens | UDP + RNAse B-GlcNAc2-Man5-GlcNAc | - |
? |
Synonyms | Comment | Organism |
---|---|---|
beta-1-2 GlcNAc transferase | - |
Homo sapiens |
GnT1 | - |
Homo sapiens |