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新型几丁质分解詹氏菌的两个高质量基因组的分离、生化特性分析和基因组测序。

Isolation, biochemical characterization, and genome sequencing of two high-quality genomes of a novel chitinolytic Jeongeupia species.

机构信息

Department of Chemistry, Werner-Siemens Chair for Synthetic Biotechnology (WSSB), TUM School of Natural Sciences, Technical University of Munich, Garching, Germany.

出版信息

Microbiologyopen. 2023 Aug;12(4):e1372. doi: 10.1002/mbo3.1372.

Abstract

Chitin is the second most abundant polysaccharide worldwide as part of arthropods' exoskeletons and fungal cell walls. Low concentrations in soils and sediments indicate rapid decomposition through chitinolytic organisms in terrestrial and aquatic ecosystems. The enacting enzymes, so-called chitinases, and their products, chitooligosaccharides, exhibit promising characteristics with applications ranging from crop protection to cosmetics, medical, textile, and wastewater industries. Exploring novel chitinolytic organisms is crucial to expand the enzymatical toolkit for biotechnological chitin utilization and to deepen our understanding of diverse catalytic mechanisms. In this study, we present two long-read sequencing-based genomes of highly similar Jeongeupia species, which have been screened, isolated, and biochemically characterized from chitin-amended soil samples. Through metabolic characterization, whole-genome alignments, and phylogenetic analysis, we could demonstrate how the investigated strains differ from the taxonomically closest strain Jeongeupia naejangsanensis BIO-TAS4-2 (DSM 24253). In silico analysis and sequence alignment revealed a multitude of highly conserved chitinolytic enzymes in the investigated Jeongeupia genomes. Based on these results, we suggest that the two strains represent a novel species within the genus of Jeongeupia, which may be useful for environmentally friendly N-acetylglucosamine production from crustacean shell or fungal biomass waste or as a crop protection agent.

摘要

几丁质是世界上第二丰富的多糖,存在于节肢动物的外骨骼和真菌细胞壁中。土壤和沉积物中的低浓度表明,陆地和水生生态系统中的几丁质分解生物会迅速分解几丁质。起作用的酶,即所谓的几丁质酶,及其产物壳寡糖,具有广泛的应用前景,从作物保护到化妆品、医学、纺织和废水处理等行业。探索新型几丁质分解生物对于扩大生物技术利用几丁质的酶学工具包以及加深对不同催化机制的理解至关重要。在这项研究中,我们展示了两个基于长读测序的高度相似的 Jeongeupia 物种的基因组,这些物种是从添加几丁质的土壤样本中筛选、分离和生化特性分析得到的。通过代谢特性、全基因组比对和系统发育分析,我们能够证明研究菌株与分类上最接近的菌株 Jeongeupia naejangsanensis BIO-TAS4-2(DSM 24253)有何不同。计算机分析和序列比对揭示了研究的 Jeongeupia 基因组中存在大量高度保守的几丁质酶。基于这些结果,我们建议这两个菌株代表 Jeongeupia 属中的一个新种,可能有助于从甲壳类动物壳或真菌生物质废物中生产环保的 N-乙酰葡萄糖胺,或用作作物保护剂。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d373/10404844/1176eb2ca27a/MBO3-12-e1372-g002.jpg

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