Flavobacterium sharifuzzamanii sp. nov., Isolated from the Sediments of the East China Sea

  • Sanjit C. Debnath
  • Can Chen
  • Shu-Xia Liu
  • Ya-Nan Di
  • Dao-Qiong Zheng
  • Xin-Yang Li
  • Xue-Wei Xu
  • Jin-Zhong XuEmail author
  • Pin-Mei WangEmail author


A novel bacterial strain A7.6T was isolated from the sediments collected near the Zhairuo Island located in the East China Sea and characterized using a polyphasic approach. Cells were Gram-stain-negative, rod-shaped, non-spore forming, non-flagellated but motile by gliding. The strain was aerobic, positive for oxidase and catalase activities. The strain can grow at 4–35 °C, pH 5.5–9.0, and 0–3% (w/v) NaCl concentration. The major polar lipid was phosphatidylethanolamine, the predominant fatty acids (> 10%) were iso-C15:0 and summed feature 3 (C16:1 ω7c and/or C16:1 ω6c). The genomic G+C content was 33.6 mol% and the major respiratory quinone was menaquinone 6. Phylogenetic analysis based on 16S rRNA gene sequences revealed that strain A7.6T belonged to the genus Flavobacterium and was closely related to Flavobacterium tistrianum GB 56.1T (98.4% similarity), F. nitrogenifigens NXU-44T (98.4%), F. ginsenosidimutans THG 01T (98.0%) and F. anhuiense D3T (97.7%). Average nucleotide identities and digital DNA–DNA hybridizations values for genomes ranged from 75.9 to 91.4% and 21.4 to 43.9% between strain A7.6T and its closest phylogenetic neighbors. The polyphasic characterization indicated that strain A7.6T represented a novel species of the genus Flavobacterium, for which the name Flavobacterium sharifuzzamanii is proposed. The type strain is A7.6T (= KCTC 62405T = MCCC 1K03485T). The NCBI GenBank accession number for the 16S rRNA gene of A7.6T is MH396692, and for the genome sequence is QJGZ00000000. The digital protologue database (DPD) Taxon Number is TA00643.





Average nucleotide identity


Digital DNA–DNA hybridization



The work was supported by Natural Science Foundation of Zhejiang Province (LY18D060003 and LY18C060002), and Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, China (2016LMFS-B19). We thank Prof. Min Wu (Zhejiang University) for his technical support.

Compliance with Ethical Standards

Conflict of interest

The authors declare that there are no conflicts of interest.

Supplementary material

284_2018_1609_MOESM1_ESM.docx (1.6 mb)
Additional transmission electron micrograph, Table S1, the Maximum-Likelihood, Maximum-Parsimony phylogenetic tree based on 16S rRNA gene sequences and TLC figures of polar lipids of strain A7.6T are available as supplementary materials. Supplementary material 1 (DOCX 1677 KB)


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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  • Sanjit C. Debnath
    • 1
  • Can Chen
    • 1
  • Shu-Xia Liu
    • 1
    • 2
  • Ya-Nan Di
    • 1
  • Dao-Qiong Zheng
    • 1
  • Xin-Yang Li
    • 1
  • Xue-Wei Xu
    • 3
  • Jin-Zhong Xu
    • 1
    Email author
  • Pin-Mei Wang
    • 1
    Email author
  1. 1.Ocean CollegeZhejiang UniversityZhoushanPeople’s Republic of China
  2. 2.Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and TechnologyQingdaoPeople’s Republic of China
  3. 3.Key Laboratory of Marine Ecosystem and Biogeochemistry, Second Institute of OceanographyState Oceanic AdministrationHangzhouPeople’s Republic of China

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