Publications by authors named "So-Ra Han"

Xenobiotics pose a substantial threat to environmental integrity by disrupting normal ecosystems. The genus , known for its metabolic versatility can degrade several xenobiotic compounds. strains have also undergone frequent taxonomic revisions and reclassifications to strains including and .

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Polyethylene terephthalate (PET), one of the most widely used plastics in the world, causes serious environmental problems. Recently, scientists have been focused on the enzymatic degradation of PET, an environmentally friendly method that offers an attractive approach to the degradation and recycling of PET. In this work, PET hydrolase from sp.

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The cold-adapted bacterium Variovorax sp. PAMC28711 possesses two distinct glycoside hydrolase (GH) families of trehalase, GH15 and GH37. While numerous studies have explored bacterial trehalase, the presence of two different trehalase genes within a single strain has not been reported until now.

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Article Synopsis
  • Cytochrome P450 monooxygenases, like CYP199A35 found in KCCM40447, are essential for producing hydroxylated compounds that aid microorganisms in survival.
  • The genome analysis of KCCM40447 unveiled a circular genome of about 9.1 million base pairs and identified 8601 protein-encoding genes, including CYP199A35, which is linked to a specific transporter gene (PcaK).
  • Experimental validation and bioinformatics showed that KCCM40447 has a complete pathway to metabolize 4-methoxybenzoate, demonstrating the effectiveness of its enzymatic processes.
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is a versatile strain that has expanded into several genera. It has been steadily reported that the genome features of exhibit activities ranging from plant growth promotion to pathogenicity across various isolation areas. The objective of this study was to investigate the secondary metabolite patterns of 366 species through comparative genomics.

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In this study, sp. PAMC28654 was isolated from a soil sample collected from the polar region of Uganda. Whole-genome sequencing and comparative genomics were performed to better understand the genomic features necessary for sp.

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The rapid growth of uncharacterized enzymes and their functional diversity urge accurate and trustworthy computational functional annotation tools. However, current state-of-the-art models lack trustworthiness on the prediction of the multilabel classification problem with thousands of classes. Here, we demonstrate that a novel evidential deep learning model (named ECPICK) makes trustworthy predictions of enzyme commission (EC) numbers with data-driven domain-relevant evidence, which results in significantly enhanced predictive power and the capability to discover potential new motif sites.

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sp. PAMC28666, an extremophilic bacterium thriving in Antarctic soil and belonging to the family, represents the only complete genome of its genus available in the NCBI database. Its genome measures 5.

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Bacteria possess diverse metabolic and genetic processes, resulting in the inability of certain bacteria to degrade trehalose. However, some bacteria do have the capability to degrade trehalose, utilizing it as a carbon source, and for defense against environmental stress. Trehalose, a disaccharide, serves as a carbon source for many bacteria, including some that are vital for pathogens.

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  • - The analysis of the Streptomyces sp. KCCM12257 strain identified 233 CAZyme genes, mainly focusing on glycosyl hydrolases, which help in breaking down polysaccharides like chitin and chitosan for oligosaccharide production.
  • - The strain KCCM12257 exhibited strong activity on colloidal chitosan but showed no activity towards chitin or chitosan powder, leading to the identification of a new chitosanase enzyme in the GH46 family that hydrolyzes colloidal chitosan into monoacetyl chitobiose.
  • - Optimal enzyme activity occurred at pH 6.5 and 40 °C, with Co metal ions significantly
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  • - This study compares the biofilm-forming abilities of two bacterial isolates from the South Shetland Islands: PAMC22086 from soil and PAMC21962 from algae, revealing key genomic traits that influence their growth and survival in different environments.
  • - Genetic analysis showed that PAMC22086 and PAMC21962 share some biofilm-related genes, but PAMC22086 possesses unique genes that help with attachment and glycogen production, indicating distinct survival strategies.
  • - The experiment showed that PAMC22086 forms a biofilm that attaches to surfaces, whereas PAMC21962 starts growing from the center, highlighting the morphological differences and adaptability of these bacteria in their respective habitats.
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This study reports the complete genome sequence of sp. PAMC28395, a strain isolated from cryoconite in Uganda. This strain possesses several active carbohydrate-active enzyme (CAZyme) genes involved in glycogen and trehalose metabolism.

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The complete genomes of strains were analyzed and compared along with the genomes of strains PAMC28711, PAMC28562, and PAMC26660, Antarctic isolates. The genomic information was collected from the NCBI database and the CAZyme database, and Prokka annotation was used to find the genes that encode for the trehalose metabolic pathway. Likewise, CAZyme annotation (dbCAN2 Meta server) was performed to predict the CAZyme family responsible for trehalose biosynthesis and degradation enzymes.

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The mechanisms underlying the survival of bacteria in low temperature and high radiation are not yet fully understood. Nakamurella sp. PAMC28650 was isolated from a glacier of Rwenzori Mountain, Uganda, which species belonged to Nakamurella genus based on 16S rRNA phylogeny, ANI (average nucleotide identity), and BLAST Ring Image Generator (BRIG) analysis among Frankineae suborder.

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Objective: To determine the characteristics of pediatric spinal cord injury (SCI) in South Korea from 1990 to 2019.

Methods: This single-centered retrospective study included pediatric SCIs. Individuals were divided into the following five groups according to onset age: ≤5, 6-12, 13-14, 15-17, and 18-19 years.

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The genus is a known group of Gram-positive, opportunistic pathogenic bacteria from cold climates, with members that are believed to play a variety of roles at low temperatures. However, their survival mechanisms in frigid environments like the Antarctic are still unknown. We identified a species of isolated from seawater in the polar region using 16S rRNA sequence analysis.

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Background: The genus Microbacterium belongs to the family Microbacteriaceae and phylum Actinobacteria. A detailed study on the complete genome and systematic comparative analysis of carbohydrate-active enzyme (CAZyme) among the Microbacterium species would add knowledge on metabolic and environmental adaptation. Here we present the comparative genomic analysis of CAZyme using the complete genome of Antarctic Microbacterium sp.

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Article Synopsis
  • The study focuses on the Arthrobacter group of bacteria, specifically strain PAMC25564, which thrives in cold environments like Antarctica, to understand their survival mechanisms.
  • Researchers sequenced the complete genome of PAMC25564, revealing a circular chromosome with 3,829 genes, including pathways related to carbohydrate metabolism necessary for energy production in extreme conditions.
  • The findings highlight the role of carbohydrate-active enzymes (CAZymes) in helping these bacteria adapt to and survive in low-temperature environments.
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Pedobacter are a representative genus of soil-associated bacteria. Here we have provided the complete genome sequence of Pedobacter sp. PAMC26386 isolated from Antarctic soil, and functionally annotated the genome, describing the unique features of carbohydrate active enzymes (CAZymes) and α-L-arabinofuranosidase (α-L-ABF).

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The genus Burkholderia and its strains PAMC28687 and PAMC26561 are lichen-associated bacteria isolated from the Antarctic region. Our study is the first to provide the genome sequence of the Burkholderia sp. PAMC26561 strain.

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  • The study investigates how a mother's smartphone addiction influences the early smartphone exposure of her child, highlighting that family environment plays a significant role in young children's screen use.
  • Using data from the K-CURE study, researchers found that children of mothers with high smartphone addiction are exposed to devices earlier than those with low addiction levels.
  • Surprisingly, the study revealed no significant link between a mother's smartphone addiction and the amount of time their child spends using the smartphone, suggesting that early exposure does not necessarily lead to increased usage.
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Study of carbohydrate-active enzymes (CAZymes) can reveal information about the lifestyle and behavior of an organism. Rhodococcus species is well known for xenobiotic metabolism; however, their carbohydrate utilization ability has been less discussed till date. This study aimed to present the CAZyme analysis of two Rhodococcus strains, PAMC28705 and PAMC28707, isolated from lichens in Antarctica, and compare them with other Rhodococcus, Mycobacterium, and Corynebacterium strains.

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Background: Spingobium sp. PAMC 28499 is isolated from the glaciers of Uganda. Uganda is a unique region where hot areas and glaciers coexist, with a variety of living creatures surviving, but the survey on them is very poor.

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The genus Hymenobacter is classified in the family Hymenobacteraceae under the phylum Bacteroidetes. They have been isolated from diverse environments, such as air, soil, and lichen, along with extreme polar environments, including the Arctic and Antarctic regions. The polar regions have attracted intense research interest for the discovery of novel microorganisms and their functions.

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