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Enzyme Evolution An...
Enzyme Evolution An Epistatic Ratchet versus a Smooth Reversible Transition
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- Ben-David, Moshe (författare)
- Weizmann Inst Sci, Rehovot, Israel; Ukko Ltd, HaMada 12, Rehovot, Israel
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- Soskine, Misha (författare)
- Weizmann Inst Sci, Rehovot, Israel; DNA Script, 29 Rue Faubourg St Jacques, Paris, France
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- Dubovetskyi, Artem (författare)
- Weizmann Inst Sci, Rehovot, Israel
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- Cherukuri, Kesava-Phaneendra (författare)
- Weizmann Inst Sci, Rehovot, Israel
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- Dym, Orly (författare)
- Weizmann Inst Sci, Rehovot, Israel
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- Sussman, Joel L (författare)
- Weizmann Inst Sci, Rehovot, Israel
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- Liao, Qinghua (författare)
- Uppsala universitet,Science for Life Laboratory, SciLifeLab,Biokemi
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- Szeler, Klaudia (författare)
- Uppsala universitet,Science for Life Laboratory, SciLifeLab,Biokemi,Kamerlin group
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- Kamerlin, Shina C. Lynn, 1981- (författare)
- Uppsala universitet,Science for Life Laboratory, SciLifeLab,Biokemi
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- Tawfik, Dan S (författare)
- Weizmann Inst Sci, Rehovot, Israel
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(creator_code:org_t)
- 2019-12-19
- 2020
- Engelska.
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Ingår i: Molecular biology and evolution. - : Oxford University Press (OUP). - 0737-4038 .- 1537-1719. ; 37:4, s. 1133-1147
- Relaterad länk:
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https://academic.oup...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- Evolutionary trajectories are deemed largely irreversible. In a newly diverged protein, reversion of mutations that led to the functional switch typically results in loss of both the new and the ancestral functions. Nonetheless, evolutionary transitions where reversions are viable have also been described. The structural and mechanistic causes of reversion compatibility versus incompatibility therefore remain unclear. We examined two laboratory evolution trajectories of mammalian paraoxonase-1, a lactonase with promiscuous organophosphate hydrolase (OPH) activity. Both trajectories began with the same active-site mutant, His115Trp, which lost the native lactonase activity and acquired higher OPH activity. A neo-functionalization trajectory amplified the promiscuous OPH activity, whereas the re-functionalization trajectory restored the native activity, thus generating a new lactonase that lacks His115. The His115 revertants of these trajectories indicated opposite trends. Revertants of the neo-functionalization trajectory lost both the evolved OPH and the original lactonase activity. Revertants of the trajectory that restored the original lactonase function were, however, fully active. Crystal structures and molecular simulations show that in the newly diverged OPH, the reverted His115 and other catalytic residues are displaced, thus causing loss of both the original and the new activity. In contrast, in the re-functionalization trajectory, reversion compatibility of the original lactonase activity derives from mechanistic versatility whereby multiple residues can fulfill the same task. This versatility enables unique sequence-reversible compositions that are inaccessible when the active site was repurposed toward a new function.
Ämnesord
- NATURVETENSKAP -- Biologi -- Biokemi och molekylärbiologi (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences -- Biochemistry and Molecular Biology (hsv//eng)
Nyckelord
- Biology with specialization in Molecular Biology
- Biologi med inriktning mot molekylärbiologi
- Biokemi
- Biochemistry
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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Ben-David, Moshe
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Soskine, Misha
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Dubovetskyi, Art ...
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Cherukuri, Kesav ...
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Dym, Orly
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Sussman, Joel L
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visa fler...
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Liao, Qinghua
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Szeler, Klaudia
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Kamerlin, Shina ...
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Tawfik, Dan S
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Molecular biolog ...
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Uppsala universitet