Vinylisomerase-dehydratases, alkenol dehydratases, linalool dehydratases and crotyl alcohol dehydratases and methods for making and using them
In alternative embodiments, provided are non-natural or genetically engineered vinylisomerase-dehydratase enzymes, including alkenol dehydratases, linalool dehydratases and crotyl alcohol dehydratases. In alternative embodiments, provided are non-natural or genetically engineered polypeptides having an activity comprising, for example, a vinylisomerase-dehydratase, an alkenol dehydratase, a linalool dehydratase and/or a crotyl alcohol dehydratase activity, or a combination thereof. In alternative embodiments, also provided are non-natural or genetically engineered nucleic acids (polynucleotides) encoding polypeptides described herein, expression or cloning vehicles comprising or having contained therein nucleic acids as described herein, and non-natural or genetically engineered cells comprising or having contained therein nucleic acids as described herein. In alternative embodiments, also provided are methods for making various organic compounds, including methyl vinyl carbinol and butadiene.
1. A method of producing or making a butadiene,
a dialkene or a compound having the general formula C n H 2n-2 with 3<n<7 from a substrate compound having the general formula C n H 2n O, with 3<n<7, comprising:
(a) expressing a recombinant or a synthetic nucleic acid under conditions wherein a recombinant polypeptide is produced, and
(b) adding the substrate to a reaction mixture comprising the recombinant polypeptide under conditions suitable to produce an enzymatic product
wherein:
(i) the recombinant or synthetic nucleic acid comprises the nucleic acid sequence as set forth in SEQ ID NO: 63;
or
(ii) the recombinant or synthetic nucleic acid comprises a nucleic acid sequence that encodes a polypeptide having the sequence as set forth in SEQ ID NO:64;
wherein the recombinant or synthetic nucleic acid encodes a polypeptide:
(1) having a linalool dehydratase-isomerase (Lin D) activity,
(2) having a vinylisomerase activity,
(3) having a dehydratase activity, optionally an alkenol dehydratase activity,
(4) able to enzymatically catalyze the conversion of a crotyl alcohol (but-2-en-1-ol) to a 3-buten-2-ol,
(5) able to enzymatically catalyze the conversion of a 3-buten-2-ol to a butadiene or a 1,3 butadiene,
(6) able to enzymatically catalyze the conversion of a crotyl alcohol (but-2-en-1-ol) to a butadiene or a 1,3 butadiene,
(7) able to enzymatically catalyze the conversion of a 2,3-dimethyl-but-2-en-1-ol into dimethyl-butadiene,
(8) catalyzing the conversion of a compound corresponding to the general formula C n H 2n O into C n H 2n-2 +H 2 O with 3<n<7; or
(9) any combination of (1) to (8).
2. The method of claim 1 , further comprising one, several or all of the following steps:
(a) obtaining a fermenter off-gas comprising a conjugated diolefin, a volatile impurity, a bio-byproduct impurity and water vapor;
(b) compressing the fermenter off-gas in a multistage compression system to produce a compressed stream;
(c) feeding the compressed stream into a first distillation zone for the removal of bio-byproduct impurity and water vapor, the first distillation zone having an upper reflux stage, middle distillation stages and a lower reboiler stage;
(d) contacting an overhead vapor stream produced from the bio-byproduct impurity and water removal distillation zone with an adsorbent to produce a dried overhead stream;
(e) feeding the dried overhead stream into a second distillation zone for the removal of volatile impurity by the top, with the second distillation zone having an upper reflux stage, middle distillation stages and a lower reboiler stage; and
(f) collecting at the bottom of the distillation zone for the removal of volatile impurity the resulting purified liquid conjugated diolefin.
3. The method of claim 1 , wherein the substrate comprises: a compound corresponding to the general formula C n H 2n O into C n H 2n-2 +H 2 O with 3<n<7, a crotyl alcohol (but-2-en-1-ol), a 3-buten-2-ol, a 2,3-dimethyl-but-2-en-1-ol, or any combination thereof.
4. The method of claim 1 , wherein the method further comprises recovering or isolating the produced compound, which optionally comprises or corresponds to the general formula C n H 2n-2 with 3<n<7.
5. The method of claim 1 , wherein the produced compound comprises or is: a 3-buten-2-ol, a dimethyl-butadiene, a butadiene (BD), or a 1,3-butadiene.
6. The method of claim 1 , wherein the substrate compound corresponding to the general formula C n H 2n O with 3<n<7, comprises or is: a crotyl alcohol, a but-3-en-2-ol or a but-3-en-1-ol, and/or the product compound corresponding to the general formula C n H 2n-2 with 3<n<7, comprises or is a 1,3-butadiene.
7. The method of claim 1 , wherein the substrate compound corresponding to the general formula C n H 2n O with 3<n<7 is or comprises a 2,3-dimethyl-but-2-en-1-ol, a 2,3-dimethyl-but-3-en-2-ol or a 2,3-dimethyl-but-3-en-1-ol, and/or the product compound corresponding to the general formula C n H 2n-2 with 3<n<7 is or comprises a dimethylbutadiene.
8. The method of claim 1 , wherein the conditions wherein a recombinant polypeptide is produced, or the conditions suitable to produce an enzymatic product comprising the compound, comprise in vitro expression of the nucleic acid.
9. The method of claim 1 , wherein the polypeptide comprises a heterologous protein sequence.
10. The method of claim 9 , wherein the heterologous protein sequence comprises a heterologous signal sequence.
11. The method of claim 10 , wherein the heterologous signal sequence comprises: SEQ ID NO:25 (a peptide heterologous signal sequence (ss) LamBss (or LamB ss)); SEQ ID NO:26 (a peptide heterologous signal sequence MalE ss); SEQ ID NO:27 (a heterologous signal sequence MglBss); SEQ ID NO:28 (a peptide heterologous signal sequence OmpAss); SEQ ID NO:29 (a peptide heterologous signal sequence PelBss); SEQ ID NO:30 (a peptide heterologous signal sequence PhoAss); SEQ ID NO:31 (a peptide heterologous signal sequence DsbAss); SEQ ID NO:32 (a peptide heterologous signal sequence SfmCss); SEQ ID NO:33 (a peptide heterologous signal sequence TolBss); SEQ ID NO:34 (a peptide heterologous signal sequence TorTss); or SEQ ID NO:35 (a peptide heterologous signal sequence FhuD ss).
12. The method of claim 1 , wherein the compound corresponding to the general formula C n H 2n O with 3<n<7 is a crotyl alcohol, a but-3-en-2-ol or a but-3-en-1-ol, and/or the compound corresponding to the general formula C n H 2n-2 with 3<n<7 is a 1,3 butadiene.
13. The method of claim 1 , wherein the compound corresponding to the general formula C n H 2n O with 3<n<7 is a 2,3-dimethyl-but-2-en-1-ol, a 2,3-dimethyl-but-3-en-2-ol or a 2,3-dimethyl-but-3-en-1-ol, and/or the compound corresponding to the general formula C n H 2n-2 with 3<n<7 is a dimethylbutadiene.
14. The method of claim 2 , wherein the resulting purified liquid conjugated diolefin is butadiene.
15. The method of claim 10 , wherein the heterologous signal sequence comprises a eukaryotic signal sequence.
16. The method of claim 15 , wherein the eukaryotic signal sequence is a yeast or fungal signal sequence.
17. The method of claim 1 , wherein the substrate comprises: a crotyl alcohol (but-2-en-1-ol) or a 3-buten-2-ol; a 2,3-dimethyl-but-2-en-1-ol.
18. The method of claim 1 , wherein the enzymatic product compound comprises a butadiene or a dialkene.