https://repository.kopri.re.kr/handle/201206/15770 2026-09-09T19:11:46Z https://repository.kopri.re.kr/handle/201206/16873 Title: Study on polar ecosystem change by warming and adaptation mechanisms of polar organism Authors: Kim, Sanghee 2026-02-28T00:00:00Z https://repository.kopri.re.kr/handle/201206/16883 Title: 테라노바만의 해빙 및 빙하 영향에 의한 해양저서생물의 군집 구조와 주요 우점종 개체군 변동 양상 추적 Authors: 박상율 2026-01-01T00:00:00Z https://repository.kopri.re.kr/handle/201206/16501 Title: Draft genome and de novo transcriptome assembly of the Antarctic marine flatworm Obrimoposthia wandeli Authors: Shin, Seung Chul; Kim, Sanghee Abstract: Objectives Obrimoposthia wandeli is the most abundant marine planarian in the intertidal zone of the maritime Antarctic region and is presumed to have adapted to the extreme conditions of the Southern Ocean. However, genomic studies on marine flatworms remain extremely limited, with only one marine planarian genome currently available in public databases. We present the first draft genome and de novo transcriptome assembly of O. wandeli from Antarctica, providing a valuable genomic resource for the study of flatworm biology and environmental adaptation under harsh environments. Data description We sequenced the genome and transcriptome of O. wandeli collected near King Sejong Station using Oxford Nanopore long-read, Illumina paired-end, and RNA sequencing. The draft genome assembly spans 1.35 Gb across 6,912 contigs, with an N50 of 343,088 bp and an estimated 48,310 predicted genes. The assembly showed Benchmarking Universal Single-Copy Orthologs (BUSCO) completeness scores of 80.2% (genome) and 80.8% (proteins). The de novo transcriptome assembly identified 26,169 non-redundant transcripts, with a BUSCO completeness of 93.1%. These genomic and transcriptomic datasets represent the first Antarctic marine planarian reference and provide a valuable resource for studying marine flatworm genomics. 2025-12-01T00:00:00Z https://repository.kopri.re.kr/handle/201206/16604 Title: Rhodococcus aromaticivorans sp. nov., an o-xylene degrading bacterium, and evidence supporting reclassification of Rhodococcus jostii RHA1 Authors: Neak Muhammad; Jeon, Jehyun; Kim Eungbin; Kim, Dockyu; Lee, Yung Mi Abstract: A Gram-positive, aerobic, non-motile bacterium with a rod-coccus shape, designated DK17(T), was isolated from a crude oil-contaminated soil and identified as a member of the genus Rhodococcus based on 16S rRNA gene analysis, showing highest similarity (99.93%) to Rhodococcus jostii DSM 44719(T). However, average nucleotide identity (ANI) and digital DNA-DNA hybridization (dDDH) values between strain DK17(T) and type strains within the genus Rhodococcus were below the species delineation thresholds of 95% and 70%, respectively. In contrast, DK17(T) exhibited ANI and dDDH values over 99% and 92%, respectively, with R. jostii RHA1. Comparative genomic analysis revealed that DK17(T) and RHA1 shared 93.5% of genes, while RHA1 and R. jostii NBRC 16295T shared only 78.6%, indicating a closer relationship between DK17(T) and RHA1. Both strains possess large genomes (similar to 9.5-9.7 Mb) comprising a linear chromosome and multiple plasmids, and encode multiple dioxygenases and secondary metabolite biosynthetic gene clusters. In vitro assays confirmed o-xylene degradation by both DK17(T) and R. jostii RHA1, consistent with the presence of the akb gene cluster. Both strains shared C16:0 as a major fatty acid and menaquinone-8 (H2) as the dominant quinone. Based on genomic, phenotypic, and chemotaxonomic data, DK17(T) (=KCCM 90599(T) = InaCC B1662(T)) is proposed as a novel species, Rhodococcus aromaticivorans sp. nov., and R. jostii RHA1 is reclassified as a member of the same species. 2025-12-01T00:00:00Z