Plant cells and plants transformed with Streptococcus mutans genes encoding wild-type or mutant glucosyltransferase B enzymes
US6087559A · kind A · utility
28Cited by
8References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 16, 1998 |
| Grant date | Jul 11, 2000 |
| Priority date | — |
| Expiry date | Jan 16, 2018 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC12N15/8245
- WIPO fieldBiotechnology
- WIPO sectorChemistry
Abstract
The present invention provides methods of making paper utilizing glucans, produced by glucosyltransferase B enzymes of the species Streptococcus mutans, instead of modified starches. The present glucans are functionally similar to the hydroxethyl modified starch and are particularly useful in the sizing and coating steps of paper manufacture. The present glucans also exhibit thermoplastic properties and impart gloss to the paper during the coating step. In particular, the present invention provides plant cells and plants transformed with Streptococcus mutans genes encoding wild-type or mutant glucosyltransferase B enzymes.
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