数字农科院2.0

Chryseobacterium cupriresistens sp. nov., a copper-resistant bacterium isolated from soil contaminated with heavy metals in Chapala Basin, Mexico

文献类型: 外文期刊

作者: Ivan Arroyo-Herrera;Ana Laura Reséndiz-Martínez;Brenda Román-Ponce;Joseph Guevara-Luna;Xiaoxia Zhang;Ayixon Sánchez-Reyes;Paulina Estrada-De Los Santos;En Tao Wang;María Soledad Vásquez-Murrieta

作者机构:

关键词: Chryseobacterium;contaminated soil;copper resistance;heavy metals;orange-pigmented bacterium

期刊名称: International Journal of Systematic and Evolutionary Microbiology

ISSN: 1466-5026

年卷期: 2025 年 75 卷 6 期

页码:

收录情况: SCIE(2025版)

摘要: A polyphasic taxonomic study was carried out on the bacterial EZn1T, isolated from heavy-metal-contaminated soil in the Chapala Basin, Mexico. This Gram-negative, aerobic, rod-shaped bacterium formed orange-pigmented colonies, producing the pigment flexirubin. Analysis of the 16S rRNA gene sequence revealed that EZn1T represents a member of the genus Chryseobacterium in the family Weeksellaceae and is closely related to Chryseobacterium cucumeris GSE06T (98.3%), Chryseobacterium phosphatilyticum ISE14T (97.7%) and Chryseobacterium indologenes NBCR 14944T (97.5%). The average nucleotide identity between the genomes of strain EZn1T and C. cucumeris GSE06T was 90.9%, and digital DNA–DNA hybridization showed values of less than 70% with the type strains for the related species. The polar lipids present in the strain included phosphatidylethanolamine, phosphatidylglycerol, glycolipids and unidentified aminoglycolipids, whereas the major cellular fatty acids included iso-C15:0 and iso-C17:0 3-OH. The whole genome of EZn1T was 5,003,090 bp in length, with a DNA G+C content of 36.7 mol%. The strain EZn1T showed physiological characteristics different from those of closely related Chryseobacterium species. This strain showed resistance to copper (20 mM), and its genome contained genes that may confer resistance to this metal and other heavy metals (As, Cd, Co, Cr, Hg, K, Mg, Mo, Na and Zn). According to the polyphasic analysis, the strain EZn1T (=TSD-322T=CAIM 1954T) is a novel species that we named Chryseobacterium cupriresistens sp. nov.

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