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Family-level diversity of extracellular proteases of sedimentary bacteria from the South China Sea

文献类型： 外文期刊

作者： Yang, Jinyu 1 ; Feng, Yangyang 1 ; Chen, Xiulan 1 ; Xie, Binbin 1 ; Zhang, Yuzhong 1 ; Shi, Mei 1 ; Zhang, Xiying 1 ;

作者机构： 1.Shandong Univ, Marine Biotechnol Res Ctr, State Key Lab Microbial Technol, Qingdao 266237, Peoples R China

2.Pilot Natl Lab Marine Sci & Technol Qingdao, Lab Marine Biol & Biotechnol, Qingdao 266237, Peoples R China

3.Ocean Univ Qingdao, Coll Marine Life Sci, Qingdao 266003, Peoples R China

4.Shandong Acad Agr Sci, Key Lab Agroprod Proc Technol Shandong Prov, Key Lab Novel Food Resources Proc, Inst Agrofood Sci & Technol,Minist Agr & Rural Af, Jinan 250100, Peoples R China

关键词： protease-producing bacteria; diversity; extracellular proteases; protease families; N-terminal amino acid sequencing; South China Sea

期刊名称：ACTA OCEANOLOGICA SINICA （ 影响因子：1.431； 五年影响因子：1.445 ）

ISSN： 0253-505X

年卷期： 2019 年 38 卷 12 期

页码：

收录情况： SCI

摘要： Protease-producing bacteria and their extracellular proteases are key players in degrading organic nitrogen to drive marine nitrogen cycling and yet knowledge on both of them is still very limited. This study screened protease-producing bacteria from the South China Sea sediments and analyzed the diversity of their extracellular proteases at the family level through N-terminal amino acid sequencing. Results of the 16S rRNA gene sequence analysis showed that all screened protease-producing bacteria belonged to the class Gammaproteobacteria and most of them were affiliated with different genera within the orders Alteromonadales and Vibrionales. The N-terminal amino acid sequence analysis for fourteen extracellular proteases from fourteen screened bacterial strains revealed that all these proteases belonged to the M4 family of metalloproteases or the S8 family of serine proteases. This study presents new details on taxa of marine sedimentary protease-producing bacteria and types of their extracellular proteases, which will help to comprehensively understand the process and mechanism of the microbial enzymatic degradation of marine sedimentary organic nitrogen.

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