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
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- 貨 號:BioVector?-NTL4(pZLR4)
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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:
AHL binds to the TraR regulator protein
TraR-AHL complex activates transcription of the traG-lacZ fusion
β-galactosidase is produced
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:
Rehydrate pellet with 0.5-1.0 mL of BioVector? #1885 broth
Transfer back to 5-6 mL broth tube
Mix well and inoculate additional tubes, slants, or plates
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: 否
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 和 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:
AHL 與 TraR 調(diào)節(jié)蛋白結(jié)合
TraR-AHL 復(fù)合物激活 traG-lacZ 融合基因的轉(zhuǎn)錄
產(chǎn)生 β-半乳糖苷酶
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:
用 0.5-1.0 mL BioVector? #1885 肉湯重新水化沉淀
轉(zhuǎn)移回 5-6 mL 肉湯管中
充分混勻,接種額外的肉湯管、斜面或平板
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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