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首頁 ? NTL4(pZLR4) BioVector? Agrobacterium tumefaciens Strain檢測 N-?;呓z氨酸內(nèi)酯(AHL)群體感應(yīng)信號的生物報告菌

NTL4(pZLR4) BioVector? Agrobacterium tumefaciens Strain檢測 N-?;呓z氨酸內(nèi)酯(AHL)群體感應(yīng)信號的生物報告菌

  • 價  格:¥99850
  • 貨  號:BioVector?-NTL4(pZLR4)
  • 產(chǎn)  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) 菌株說明書

中文版本

1. 菌株概述

  • 菌株名稱: BioVector? NTL4(pZLR4)

  • ATCC編號: BAA-2240?

  • 物種:Agrobacterium fabrum(原名 Agrobacterium tumefaciens、Rhizobium radiobacter

  • 模式菌株:

  • 生物安全等級: BSL-1

  • 構(gòu)建年份: 1996年

  • 保藏者: S. Farrand,伊利諾伊大學(xué)

  • 基因組測序: 已完成(ATCC基因組門戶)

2. 描述與應(yīng)用
BioVector? NTL4(pZLR4) 是通過將重組質(zhì)粒 pZLR4 轉(zhuǎn)化至 Agrobacterium fabrum NTL4 菌株中獲得的重組細(xì)菌菌株。該菌株經(jīng)專門設(shè)計,可用作 檢測 N-?;呓z氨酸內(nèi)酯(AHL)群體感應(yīng)信號的生物報告菌。

該菌株可檢測 中長鏈 AHLs,包括:

  • C6-AHL、C10-AHL、C12-AHL、C14-AHL

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

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

3. 遺傳特征

宿主菌株(NTL4):

  • 源自 Agrobacterium fabrum(原名 A. tumefaciens

  • AHL 缺陷型背景

  • 適用于 AHL 檢測實驗的受體菌

質(zhì)粒(pZLR4):

  • 大小: 文獻中未具體說明

  • 抗性標(biāo)記: 賦予 慶大霉素β-內(nèi)酰胺類抗生素 抗性

  • 報告系統(tǒng): 包含 AHL 誘導(dǎo)型 β-半乳糖苷酶(LacZ) 基因

  • 功能: 質(zhì)粒攜帶 traG-lacZ 融合基因,在遇到外源 AHL 信號時被激活

4. 作用機制
當(dāng) BioVector? NTL4(pZLR4) 遇到 AHL 分子(特別是中長鏈 AHLs)時,發(fā)生以下過程:

  1. AHL 與 TraR 調(diào)節(jié)蛋白結(jié)合

  2. TraR-AHL 復(fù)合物激活 traG-lacZ 融合基因的轉(zhuǎn)錄

  3. 產(chǎn)生 β-半乳糖苷酶

  4. 可使用顯色底物(如 X-gal)檢測酶活性,產(chǎn)生藍(lán)色,或通過酶學(xué)實驗進行定量檢測

5. 生長與培養(yǎng)條件

  • 推薦培養(yǎng)基: BioVector? ATCC Medium 1885(或適當(dāng)補充的 BioVector? LB-Miller 培養(yǎng)基)

  • 溫度: 28°C

  • 需氧條件: 需氧

  • 抗生素篩選: 培養(yǎng)基中添加 25 μg/mL 慶大霉素 以確保質(zhì)粒保持

  • 生長時間: 菌落形成需 48 小時

6. 處理與儲存

  • 產(chǎn)品形式: 凍干粉

  • 儲存條件:

    • 凍干粉:2°C 至 8°C

    • 冷凍保存:-80°C 或更低溫度

  • 復(fù)蘇步驟:

    1. 用 0.5-1.0 mL BioVector? #1885 肉湯重新水化沉淀

    2. 轉(zhuǎn)移回 5-6 mL 肉湯管中

    3. 充分混勻,接種額外的肉湯管、斜面或平板

    4. 28°C 培養(yǎng) 48 小時

7. 質(zhì)量控制

  • 驗證: 經(jīng)全基因組測序驗證

  • 基因組大?。?/span> 5,483,803 bp

  • GC含量: 59.12%

  • 無菌檢測: 無污染物

8. 應(yīng)用

  • 群體感應(yīng)研究: 檢測和表征各種細(xì)菌產(chǎn)生的 AHL 信號

  • 篩選 AHL 產(chǎn)生菌: 鑒定產(chǎn)生中長鏈 AHL 的菌株

  • 群體淬滅研究: 評估潛在群體淬滅酶或化合物對 AHL 的降解作用

  • 生物膜研究: 研究 AHL 信號在生物膜形成中的作用

  • 環(huán)境監(jiān)測: 檢測環(huán)境樣品中的 AHL 信號


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