EC Number   |
Protein Variants |
Reference  |
|---|
   4.2.3.119 | more |
to elucidate critical amino acids involved in determining monoterpene product distribution, a combination of domain swapping and reciprocal site-directed mutagenesis was carried out between (-)-(4S)-limonene synthase LS and (-)-(4S)-limonene/(-)-(1S, 5S)-alpha-pinene synthase LPS. Amino acids in the predicted D through F helix regions are critical for product determination. Chimera consisting of N-terminal 218 residues of LS plus corresponding C-terminus of LPS produces 20.7% alpha-pinene, 11.2% sabinene, 7.1% beta-pinene, 25.6% limonene, 35.4% beta-phellandrene, with 42.8% relative activity. Chimera consisting of N-terminal 518 residues of LS plus corresponding C-terminus of LPS produces 6.4% alpha-pinene, 1.5% sabinene, 11% beta-pinene, 64.1% limonene, 17% beta-phellandrene, with 101% relative activity. Chimera consisting of N-terminal 442 residues of LPS plus corresponding C-terminus of LS produces 11% alpha-pinene, 1.4% sabinene, 6.3% beta-pinene, 47.9% limonene, 33.3% beta-phellandrene, with 41.7% relative activity |
649494 |
| 4.2.3.119 | C372S |
replacement with corresponding residue of (-)-camphene synthase, 97% of wild-type activity. Mutant produces an increased proportion of (-)-alpha-pinene and a correspondingly decreased proportion of (-)-beta-pinene, while the levels of total pinenes remains relatively constant |
663770 |
| 4.2.3.119 | C372S/C480S |
replacement with corresponding residue of (-)-camphene synthase, 72% of wild-type activity. Mutant produces an increased proportion of (-)-alpha-pinene and a correspondingly decreased proportion of (-)-beta-pinene |
663770 |
| 4.2.3.119 | C372S/F597W |
replacement with corresponding residue of (-)-camphene synthase, 100% of wild-type activity. Mutant produces an increased proportion of (-)-alpha-pinene and a correspondingly decreased proportion of (-)-beta-pinene |
663770 |
| 4.2.3.119 | C372S/F597W/S485C/F597W |
replacement with corresponding residue of (-)-camphene synthase, 99% of wild-type activity. Mutant produces about 80%(-)-alpha-pinene and 10% (-)-beta-pinene |
663770 |
| 4.2.3.119 | C372S/S485C |
replacement with corresponding residue of (-)-camphene synthase, 92% of wild-type activity. Mutant produces an increased proportion of (-)-alpha-pinene and a correspondingly decreased proportion of (-)-beta-pinene |
663770 |
| 4.2.3.119 | C480S |
replacement with corresponding residue of (-)-camphene synthase, 97% of wild-type activity. Mutant produces an increased proportion of (-)-alpha-pinene and a correspondingly decreased proportion of (-)-beta-pinene, while the levels of total pinenes remains relatively constant |
663770 |
| 4.2.3.119 | C480S/F597W |
replacement with corresponding residue of (-)-camphene synthase, 7% of wild-type activity. Mutant produces an increased proportion of (-)-alpha-pinene and a correspondingly decreased proportion of (-)-beta-pinene |
663770 |
| 4.2.3.119 | C480S/S485C |
replacement with corresponding residue of (-)-camphene synthase, 70% of wild-type activity. Mutant produces an increased proportion of (-)-alpha-pinene and a correspondingly decreased proportion of (-)-beta-pinene |
663770 |
| 4.2.3.119 | F597W |
replacement with corresponding residue of (-)-camphene synthase, 73% of wild-type activity. Mutant produces an increased proportion of (-)-alpha-pinene and a correspondingly decreased proportion of (-)-beta-pinene, while the levels of total pinenes remains relatively constant |
663770 |
