A Robust and Versatile Method of Combinatorial Chemical Synthesis of Gene Libraries via Hierarchical Assembly of Partially Randomized Modules
- Georg-August Universität Göttingen (Germany). Inst. of Microbiology and Genetics. Dept. of Molecular Microbiology and Genetics; Georg-August Universität Göttingen (Germany). Inst. of Microbiology and Genetics. Dept. Molecular Genetics and Preparative Molecular Biology; DOE/OSTI
- Georg-August Universität Göttingen (Germany). Inst. of Microbiology and Genetics. Dept. Molecular Genetics and Preparative Molecular Biology; Univ. Medical Center, Göttingen (Germany); Information Network of Depts. of Dermatology (IVDK), Göttingen (Germany)
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States). Group T-g. Theoretical Biology and Biophysics; Univ. Greifswald (Germany). Inst. for Mathematics and Informatics; Georg-August-Universität Göttingen (Germany). Neurobiology Lab.
- Georg-August-Universität Göttingen (Germany). Neurobiology Lab.; German Primate Center GmbH, Göttingen (Germany). Neurobiology Lab.
- Georg-August Universität Göttingen (Germany). Inst. of Microbiology and Genetics. Dept. Molecular Genetics and Preparative Molecular Biology; Georg-August Universität Göttingen (Germany). Inst. of Microbiology and Genetics. Dept. Molecular Genetics
A major challenge in gene library generation is to guarantee a large functional size and diversity that significantly increases the chances of selecting different functional protein variants. The use of trinucleotides mixtures for controlled randomization results in superior library diversity and offers the ability to specify the type and distribution of the amino acids at each position. Here we describe the generation of a high diversity gene library using tHisF of the hyperthermophile Thermotoga maritima as a scaffold. Combining various rational criteria with contingency, we targeted 26 selected codons of the thisF gene sequence for randomization at a controlled level. We have developed a novel method of creating full-length gene libraries by combinatorial assembly of smaller sub-libraries. Full-length libraries of high diversity can easily be assembled on demand from smaller and much less diverse sublibraries, which circumvent the notoriously troublesome long-term archivation and repeated proliferation of high diversity ensembles of phages or plasmids. We developed a generally applicable software tool for sequence analysis of mutated gene sequences that provides efficient assistance for analysis of library diversity. Finally, practical utility of the library was demonstrated in principle by assessment of the conformational stability of library members and isolating protein variants with HisF activity from it. Our approach integrates a number of features of nucleic acids synthetic chemistry, biochemistry and molecular genetics to a coherent, flexible and robust method of combinatorial gene synthesis.
- Research Organization:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC)
- Grant/Contract Number:
- AC52-06NA25396
- OSTI ID:
- 1627763
- Journal Information:
- PLoS ONE, Journal Name: PLoS ONE Journal Issue: 9 Vol. 10; ISSN 1932-6203
- Publisher:
- Public Library of ScienceCopyright Statement
- Country of Publication:
- United States
- Language:
- English
| Preparation of trinucleotide phosphoramidites as synthons for the synthesis of gene libraries 
 | journal | January 2018 | 
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