Caulobacter endophyticus sp. nov., an endophytic bacterium harboring three lasso peptide biosynthetic gene clusters and producing indoleacetic acid isolated from maize root
文献类型： 外文期刊
作者： Gao, Jun-lian 1 ; Sun, Pengbo 2 ; Sun, Yu-Chen 1 ; Xue, Jing 1 ; Wang, Guoliang 1 ; Wang, Li-wei 1 ; Du, Yunpeng 1 ; Zhan 1 ;
作者机构： 1.Beijing Acad Agr & Forestry Sci, Beijing Agrobiotechnol Res Ctr, Beijing Key Lab Agr Genet Resources & Biotechnol, Beijing 100097, Peoples R China
2.Chinese Acad Agr Sci, Inst Agr Resources & Reg Planning, Minist Agr & Rural Affairs, Key Lab Microbial Resources, Beijing 100081, Peoples R China
3.German Canc Res Ctr, Div Pediat Neurooncol, D-69120 Heidelberg, Germany
4.German Canc Res Ctr, German Canc Consortium DKTK, D-69120 Heidelberg, Germany
5.Beijing Univ Agr, Coll Food Sci & Engn, Beijing 102206, Peoples R China
关键词： Caulobacter endophyticus; Lasso peptide biosynthetic gene clusters; Indoleacetic acid producing; Maize; Root
期刊名称：ANTONIE VAN LEEUWENHOEK INTERNATIONAL JOURNAL OF GENERAL AND MOLECULAR MICROBIOLOGY （ 影响因子：2.674； 五年影响因子：2.09 ）
ISSN： 0003-6072
年卷期：
页码：
收录情况： SCI
摘要： A novel Gram-stain-negative, aerobic and rod-shaped bacterium with a single polar flagellum or a stalk at the end of the cell, was isolated from maize roots in the Fangshan District of Beijing, People's Republic of China. The new strain designated 774(T) produced indole acetic acid (IAA). The 16S rRNA gene sequence analysis indicated that strain 774(T) belongs to the genus Caulobacter and is closely related to Caulobacter flavus RHGG3(T), Caulobacter zeae 410(T)and Caulobacter radices 695(T), all with sequence similarities of 99.9%. The genome size of strain774(T) was 5.4 Mb, comprising 5042 predicted genes with a DNA G+C content of 68.7%.Three striking lasso peptide biosynthetic gene clusters and two IAA synthesis genes belonging to the TPM pathway were also found in the genome of strain 774(T). The average nucleotide identity values and digital DNA-DNA hybridization values of the strain774(T) with its closely phylogenetic neighbours were less than 91.5% and 45.0%, respectively, indicating a new Caulobacter species. The major fatty acids of strain774(T) were identified as C16: 0 (27.7%), summed feature 3 (C16: 1 omega 6c and/or C16: 1 omega 7c) (12.6%) and summed feature 8 (C18: 1 omega 7c and/or C18: 1 omega 6c) (42.9%).The major polar lipids consisted of phosphatidyl-glycerol and glycolipids. The predominant ubiquinone was identified as Quinone 10. Based on the polyphasic characterization, strain 774(T) represents a novel species of the genus Caulobacter, for which the name Caulobacter endophyticus sp. nov. is proposed with 774(T) (= CGMCC 1.16558(T) = DSM 106777(T)) as the type strain.
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