Heat stable mutants of starch biosynthesis enzymes
US6069300A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 18, 1997 |
| Grant date | May 30, 2000 |
| Priority date | — |
| Expiry date | Nov 18, 2017 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC12N15/8271
- WIPO fieldBiotechnology
- WIPO sectorChemistry
Abstract
The subject invention pertains to novel mutant polynucleotide molecules that encode enzymes that have increased heat stability. These polynucleotides, when expressed in plants, result in increased yield in plants grown under conditions of heat stress. The polynucleotide molecules of the subject invention encode maize endosperm ADP glucose pyrophosphorylase (AGP) and soluble starch synthase (SSS) enzyme activities. Plants and plant tissue bred to contain, or transformed with, the mutant polynucleotides, and expressing the polypeptides encoded by the polynucleotides, are also contemplated by the present invention. The subject invention also concerns methods for isolating polynucleotides and polypeptides contemplated within the scope of the invention. Methods for increasing yield in plants grown under conditions of best stress are also provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.