| EC |
4.2.99.23 |
| Accepted name: |
tuliposide B-converting enzyme |
| Reaction: |
6-tuliposide B = tulipalin B + D-glucose |
| Glossary: |
6-tuliposide B = 6-O-[(3S)-3,4-dihydroxy-2-methylenebutanoyl]-D-glucose
tulipalin B = (4S)-4-hydroxy-3-methylideneoxolan-2-one |
| Systematic name: |
6-tuliposide B D-glucose-lyase (tulipalin B-forming) |
| Comments: |
The enzyme, characterized from pollen of the plant Tulipa gesneriana (tulip), catalyses the intramolecular transesterification of 6-tuliposide B to form the antibiotic aglycon tulipalin B as a sole product. It does not catalyse the hydrolysis of 6-tuliposide B to form a hydroxy acid. The enzyme has marginal activity with 6-tuliposide A. cf. EC 4.2.99.22, tuliposide A-converting enzyme. |
| References: |
| 1. |
Nomura, T., Murase, T., Ogita, S. and Kato, Y. Molecular identification of tuliposide B-converting enzyme: a lactone-forming carboxylesterase from the pollen of tulip. Plant J. 83 (2015) 252–262. [PMID: 25997073] |
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| [EC 4.2.99.23 created 2016] |
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