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Diversity, Distribution, and Chromosomal Rearrangements of TRIP1 Repeat Sequences in

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Journal Genes (Basel)
Publisher MDPI
Date 2024 Feb 24
PMID 38397225
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Abstract

The bacterial genome contains numerous repeated sequences that greatly affect its genomic plasticity. The K-12 genome contains three copies of the TRIP1 repeat sequence (TRIP1a, TRIP1b, and TRIP1c). However, the diversity, distribution, and role of the TRIP1 repeat sequence in the genome are still unclear. In this study, after screening 6725 genomes, the TRIP1 repeat was found in the majority of strains (96%: 6454/6725). The copy number and direction of the TRIP1 repeat sequence varied in each genome. Overall, 2449 genomes (36%: 2449/6725) had three copies of TRIP1 (TRIP1a, TRIP1b, and TRIP1c), which is the same as K-12. Five types of TRIP1 repeats, including two new types (TRIP1d and TRIP1e), are identified in genomes, located in 4703, 3529, 5741, 1565, and 232 genomes, respectively. Each type of TRIP1 repeat is localized to a specific locus on the chromosome. TRIP1 repeats can cause intra-chromosomal rearrangements. A total of 156 rearrangement events were identified, of which 88% (137/156) were between TRIP1a and TRIP1c. These findings have important implications for future research on TRIP1 repeats.

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