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Bacillus pumilus mutant strain with quorum-sensing system inhibiting effects

A quorum sensing system, Bacillus pumilus technology, applied in the field of microorganisms

Inactive Publication Date: 2014-07-23
SHANGHAI OCEAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no report on a microbial preparation of Bacillus pumilus with quorum sensing system inhibition

Method used

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  • Bacillus pumilus mutant strain with quorum-sensing system inhibiting effects
  • Bacillus pumilus mutant strain with quorum-sensing system inhibiting effects
  • Bacillus pumilus mutant strain with quorum-sensing system inhibiting effects

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Experimental program
Comparison scheme
Effect test

Embodiment

[0032] 1. Materials and methods

[0033] 1.1 Materials

[0034] 1.1.1 Strains and activation

[0035] Chromobacteri μm violaceum was purchased from ATCC in the United States; Bacillus strains X77, X93, and X3914 were preserved in our laboratory.

[0036] Transfer the Violet Bacillus preserved in lyophilized powder to 5ml of LB liquid medium, and culture it at 26°C for 24 hours; then take 1mL of the bacterial liquid and transfer it to 5mL of LB liquid medium and culture it at 26°C for 24h; Streak the plate for separation, pick a single purple colony and streak it on the LB slant and save it for later use.

[0037] 1.1.2 Media and reagents

[0038] Nutrient agar medium (purchased from Shanghai Dingguo), LB medium (purchased from Shanghai Sangong); bacterial genome extraction kit (purchased from Shanghai Sangong); PCR reagents: Master Mix2x, universal primers 1492r, 27f, ( Shanghai Meiji Biotechnology Company), D2000marker (purchased from Beijing Tiangen), sodium nitrite (NaN...

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Abstract

The invention relates to bacillus pumilus mutant strain with high-efficient inhibiting effects on quorum-sensing (QS) system. Preservation number of the bacillus pumilus mutant strain is CCTCC No.2013534. According to a preparation method of the bacillus pumilus mutant strai, F3-1 bacterial strain is taken as an original strain; mutant strain FF1-2, which can be expressed stably in progeny and possesses high sensitivity on QS signal molecules, is obtained via mutation breeding. The bacillus pumilus mutant strain is used for preparing microbial preparations which are used for high-efficient controlling and preventing of aquatic bacterial diseases, and providing research on novel methods based on interference on the bacterial quorum-sensing system with foundation.

Description

【Technical field】 [0001] The invention relates to the field of microorganisms, in particular to a bacillus pumilus microbial preparation with quorum sensing system inhibitory effect. 【Background technique】 [0002] Bacterial diseases have always been one of the important reasons that plague the development of aquaculture. In recent years, while the high-density and intensive production mode has promoted the increase of production in the aquaculture industry, it has also increased the chance, frequency and harm of bacterial diseases; in addition, drug resistance, drug residues and The destruction of the ecological environment has also become the focus of social attention. Therefore, finding alternative drugs to antibiotics and exploring new control methods have become one of the important research directions for aquatic disease control. Quorum sensing (QS for short) means that bacteria can spontaneously produce and release some specific signaling molecules, sense changes in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12N1/20A61K35/74A61P31/04C12R1/07A61K35/742
Inventor 宋增福范斌陈彪张庆华
Owner SHANGHAI OCEAN UNIV
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