首页 » NTL4(pZLR4) BioVector® Agrobacterium tumefaciens Strain检测 N-酰基高丝氨酸内酯(AHL)群体感应信号的生物报告菌

NTL4(pZLR4) BioVector® Agrobacterium tumefaciens Strain检测 N-酰基高丝氨酸内酯(AHL)群体感应信号的生物报告菌

  • 价  格:¥99850
  • 货  号:BioVector®-NTL4(pZLR4)
  • 产  地:北京
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BioVector® Agrobacterium tumefaciens NTL4(pZLR4) Strain

English Version

1. Strain Overview

  • Strain Name: BioVector® NTL4(pZLR4)

  • ATCC Number: BAA-2240™

  • Species:Agrobacterium fabrum (formerly Agrobacterium tumefaciens, Rhizobium radiobacter)

  • Type Strain: No

  • Biosafety Level: BSL-1

  • Year of Origin: 1996

  • Depositor: S. Farrand, University of Illinois

  • Genome Sequenced: Yes (ATCC Genome Portal)

2. Description and Applications
BioVector® NTL4(pZLR4) is a recombinant bacterial strain derived from Agrobacterium fabrum strain NTL4 via transformation with the recombinant plasmid pZLR4. This strain is specifically engineered to function as a bioreporter for detecting N-acyl homoserine lactone (AHL) quorum-sensing signals.

The strain detects medium- to long-chain AHLs, including:

  • C6-AHL, C10-AHL, C12-AHL, C14-AHL

  • C6-3-hydroxy-AHL, C8-3-hydroxy-AHL, C10-3-hydroxy-AHL

  • All 3-oxo-AHLs (e.g., 3OC6, 3OC8, 3OC10, 3OC12, 3OC14)

3. Genetic Features

Host Strain (NTL4):

  • Derived from Agrobacterium fabrum (formerly A. tumefaciens)

  • AHL-deficient background

  • Suitable recipient for AHL detection assays

Plasmid (pZLR4):

  • Size: Not specified in literature

  • Resistance Markers: Confers resistance to gentamicin and beta-lactam antibiotics

  • Reporter System: Contains an AHL-inducible β-galactosidase (LacZ) gene

  • Function: Plasmid carries a traG-lacZ fusion that is activated in the presence of exogenous AHL signals

4. Mechanism of Action
When BioVector® NTL4(pZLR4) encounters AHL molecules (specifically medium- to long-chain AHLs), the following occurs:

  1. AHL binds to the TraR regulator protein

  2. TraR-AHL complex activates transcription of the traG-lacZ fusion

  3. β-galactosidase is produced

  4. Enzyme activity can be detected using chromogenic substrates (e.g., X-gal) producing blue color, or quantified via enzymatic assays

5. Growth and Culture Conditions

  • Recommended Medium: BioVector® ATCC Medium 1885 (or BioVector® LB-Miller medium supplemented appropriately)

  • Temperature: 28°C

  • Atmosphere: Aerobic

  • Antibiotic Selection: Supplement media with 25 μg/mL gentamicin to ensure plasmid retention

  • Growth Time: 48 hours for colony formation

6. Handling and Storage

  • Product Format: Freeze-dried

  • Storage Conditions:

    • Freeze-dried: 2°C to 8°C

    • Frozen stocks: -80°C or colder

  • Revival Procedure:

    1. Rehydrate pellet with 0.5-1.0 mL of BioVector® #1885 broth

    2. Transfer back to 5-6 mL broth tube

    3. Mix well and inoculate additional tubes, slants, or plates

    4. Incubate at 28°C for 48 hours

7. Quality Control

  • Verification: Whole-genome sequencing verified

  • Genome Size: 5,483,803 bp

  • GC Content: 59.12%

  • Sterility: Negative for contaminants

8. Applications

  • Quorum Sensing Research: Detection and characterization of AHL signals from various bacteria

  • Screening AHL-Producing Bacteria: Identification of strains producing medium- to long-chain AHLs

  • Quorum Quenching Studies: Evaluating AHL degradation by potential quorum-quenching enzymes or compounds

  • Biofilm Research: Studying the role of AHL signals in biofilm formation

  • Environmental Monitoring: Detection of AHL signals in environmental samples


BioVector® NTL4(pZLR4) 菌株说明书

中文版本

1. 菌株概述

  • 菌株名称: BioVector® NTL4(pZLR4)

  • ATCC编号: BAA-2240™

  • 物种:Agrobacterium fabrum(原名 Agrobacterium tumefaciensRhizobium radiobacter

  • 模式菌株:

  • 生物安全等级: BSL-1

  • 构建年份: 1996年

  • 保藏者: S. Farrand,伊利诺伊大学

  • 基因组测序: 已完成(ATCC基因组门户)

2. 描述与应用
BioVector® NTL4(pZLR4) 是通过将重组质粒 pZLR4 转化至 Agrobacterium fabrum NTL4 菌株中获得的重组细菌菌株。该菌株经专门设计,可用作 检测 N-酰基高丝氨酸内酯(AHL)群体感应信号的生物报告菌

该菌株可检测 中长链 AHLs,包括:

  • C6-AHL、C10-AHL、C12-AHL、C14-AHL

  • C6-3-羟基-AHL、C8-3-羟基-AHL、C10-3-羟基-AHL

  • 所有 3-氧代-AHLs(例如 3OC6、3OC8、3OC10、3OC12、3OC14)

3. 遗传特征

宿主菌株(NTL4):

  • 源自 Agrobacterium fabrum(原名 A. tumefaciens

  • AHL 缺陷型背景

  • 适用于 AHL 检测实验的受体菌

质粒(pZLR4):

  • 大小: 文献中未具体说明

  • 抗性标记: 赋予 庆大霉素β-内酰胺类抗生素 抗性

  • 报告系统: 包含 AHL 诱导型 β-半乳糖苷酶(LacZ) 基因

  • 功能: 质粒携带 traG-lacZ 融合基因,在遇到外源 AHL 信号时被激活

4. 作用机制
当 BioVector® NTL4(pZLR4) 遇到 AHL 分子(特别是中长链 AHLs)时,发生以下过程:

  1. AHL 与 TraR 调节蛋白结合

  2. TraR-AHL 复合物激活 traG-lacZ 融合基因的转录

  3. 产生 β-半乳糖苷酶

  4. 可使用显色底物(如 X-gal)检测酶活性,产生蓝色,或通过酶学实验进行定量检测

5. 生长与培养条件

  • 推荐培养基: BioVector® ATCC Medium 1885(或适当补充的 BioVector® LB-Miller 培养基)

  • 温度: 28°C

  • 需氧条件: 需氧

  • 抗生素筛选: 培养基中添加 25 μg/mL 庆大霉素 以确保质粒保持

  • 生长时间: 菌落形成需 48 小时

6. 处理与储存

  • 产品形式: 冻干粉

  • 储存条件:

    • 冻干粉:2°C 至 8°C

    • 冷冻保存:-80°C 或更低温度

  • 复苏步骤:

    1. 用 0.5-1.0 mL BioVector® #1885 肉汤重新水化沉淀

    2. 转移回 5-6 mL 肉汤管中

    3. 充分混匀,接种额外的肉汤管、斜面或平板

    4. 28°C 培养 48 小时

7. 质量控制

  • 验证: 经全基因组测序验证

  • 基因组大小: 5,483,803 bp

  • GC含量: 59.12%

  • 无菌检测: 无污染物

8. 应用

  • 群体感应研究: 检测和表征各种细菌产生的 AHL 信号

  • 筛选 AHL 产生菌: 鉴定产生中长链 AHL 的菌株

  • 群体淬灭研究: 评估潜在群体淬灭酶或化合物对 AHL 的降解作用

  • 生物膜研究: 研究 AHL 信号在生物膜形成中的作用

  • 环境监测: 检测环境样品中的 AHL 信号


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