Various short autonomously replicating sequences from the yeast Kluyveromyces marxianus seemingly without canonical consensus
| Autor: | Rinji Akada, Babiker M.A. Abdel-Banat, Hisashi Hoshida |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Genetics
Kluyveromyces lactis biology Autonomously replicating sequence Point mutation Saccharomyces cerevisiae Transformability QH426-470 biology.organism_classification Functional validation Microbiology QR1-502 Kluyveromyces marxianus KmARS Consensus sequence biology.protein General Earth and Planetary Sciences Genomic library Interchanged sequences DNA unwinding element NHEJ Research Paper General Environmental Science |
| Zdroj: | Current Research in Microbial Sciences, Vol 2, Iss, Pp 100053-(2021) Current Research in Microbial Sciences |
| ISSN: | 2666-5174 |
| Popis: | Eukaryotic autonomously replicating sequences (ARSs) are composed of three domains, A, B, and C. Domain A is comprised of an ARS consensus sequence (ACS), while the B domain has the DNA unwinding element and the C domain is important for DNA-protein interactions. In Saccharomyces cerevisiae and Kluyveromyces lactis ARS101, the ACS is commonly composed of 11 bp, 5ˊ-(A/T)AAA(C/T)ATAAA(A/T)-3ˊ. This core sequence is essential for S. cerevisiae and K. lactis ARS activity. In this study, we identified ARS-containing sequences from genomic libraries of the yeast Kluyveromyces marxianus DMKU3-1042 and validated their replication activities. The identified K. marxianus DMKU3-1042 ARSs (KmARSs) have very effective replication ability but their sequences are divergent and share no common consensus. We have carried out point mutations, deletions, and base pairs substitutions within the sequences of some of the KmARSs to identify the sequence(s) that influence the replication activity. Consensus sequences same as the 11 bp ACS of S. cerevisiae and K. lactis were not found in all minimum functional KmARSs reported here except KmARS7. Moreover, partial sequences from different KmARSs are interchangeable among each other to retain the ARS activity. We have also specifically identified the essential nucleotides, which are indispensable for replication, within some of the KmARSs. Our deletions analysis revealed that only 21 bp in KmARS18 could retain the ARS activity. The identified KmARSs in this study are unique compared to other yeasts’ ARSs, do not share common ACS, and are interchangeable. Highlights • Identification of minimal autonomously replicating sequences (ARSs) from the yeast Kluyveromyces marxianus DMKU3-1042. • The identities of the isolated ARSs are divergent and have no common consensus with the ARSs of other yeasts. • A short ARS sequence of twenty-one nucleotides functions as an effective replicator in K. marxianus DMKU3-1042. • Segments of ARSs from the yeast K. marxianus are interchangeable among each other. • Functional ARSs are found in both the intergenic and coding sequences of the strain DMKU3-1042. |
| Databáze: | OpenAIRE |
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