Phage DNA Isolation Kit

Features and Benefits

Isolate high quality DNA from a broad variety of phage strains
High yields of total DNA
Fast and easy processing using a rapid spin-column format
No phenol or chloroform extractions or cesium chloride banding required
High yields of DNA recovered 3-15 µg DNA from 10⁸-10¹⁰pfu/ mL of enriched phages

This kit provides a rapid spin column method for the purification of total DNA from a broad spectrum of bacteriophages propagated in bacteria grown in liquid cultures. The DNA is isolated without the use of phenol, chloroform or cesium chloride banding procedures. The spin-column based procedure is rapid and can be completed in less than 45 minutes. The kit is highly efficient for processing small volumes of phage supernatant (500 µL – 1 mL) and with the optional DNase and Proteinase K treatments phage DNA yields are maximized while host DNA contamination is minimized. Purified total phage DNA is of the highest integrity, and can be used in a number of downstream applications including PCR, qPCR, Restriction Fragment Length Polymorphism (RFLP), sequencing, cloning, Southern Blot and more.

Details

Supporting Data

Figure 1. Effective Host Genomic DNA Removal without Reducing Phage DNA Yield. Total DNA was isolated from four enriched phage cultures using Norgen's Phage DNA Isolation Kit. A DNase I pre-treatment was performed prior to adding the provided Lysis Buffer. Briefly, 20 units of DNase I was added to 1 mL of enriched phage culture and the mixture was incubated at room temperature for 20 minutes. After the DNAase I treatment the procedure was followed. As a control, DNA was isolated from aliquots of the same 4 cultures using Norgen’s Phage DNA Isolation Kit without performing the DNase I treatment. For DNA analysis 10 µL of each 50 µL elution was loaded onto a 1X TAE agarose gel. As it can be seen, the phage DNA was safely protected from the DNase I treatment by its coat protein, while the host genomic DNA was efficiently degraded by the DNase I. Thus the DNase I pre-treatment resulted in less host gDNA contamination in the final phage elution without influencing the total phage DNA yield. Lane M is Norgen's Highranger 1 kb DNA Ladder (Cat. 11900)

Figure 2. Optional Proteinase K Treatment Improves DNA Yield for Certain Phage Strains. Total DNA was isolated with and without the optional Proteinase K treatment using Norgen's Phage DNA Isolation Kit. Briefly, 4 µL of Proteinase K (20 mg/mL) was added to 1 mL of enriched phage culture and incubated at 55°C for 15 minutes with the phage Lysis Buffer. After the Proteinase K treatment the procedure was followed. As a control, DNA was isolated from aliquots of the same 8 cultures using Norgen's Phage DNA Isolation Kit without performing the Proteinase K treatment. For DNA analysis 10 µL of each 50 µL elution was loaded onto a 1X TAE agarose gel and the yield of DNA was compared from the eight different phage types (lane 1 to 8). As it can be seen, the optional treatment of Proteinase K improved the phage DNA yield in Lanes 2, 5 and 6 dramatically. Lane M is Norgen's Highranger 1 kb DNA Ladder (Cat. 11900)

Kit Specifications
Column Binding Capacity	50 µg
Maximum Column Loading Volume	650 µL
Size of DNA Purified	All sizes
Maximum Amount of Starting Material	1 x 10¹⁰ pfu/mL enriched phages
Average Yield*	3-15 µg DNA from 10⁸-10¹⁰ pfu/mL of enriched phages
Time to Complete 10 Purifications	45 minutes

* Average yields will vary depending upon a number conditions used and developmental stage.

Storage Conditions and Product Stability
All solutions should be kept tightly sealed and stored at room temperature. This kit is stable for 1 year after the date of shipment.

Component	Cat. 46800 (50 preps)	Cat. 46850 (100 preps)
Lysis Buffer B	40 mL	2 x 40 mL
Wash Solution A	38 mL	2 x 38 mL
Elution Buffer B	8 mL	2 x 8 mL
Spin Columns	50	100
Collection Tubes	50	100
Elution Tubes (1.7 mL)	50	100
Product Insert	1	1

Documentation

FAQs

Spin Column

I noticed the column was clogged. What causes this?

Column clogging may occur due to one or more of the following reasons:

Centrifugation speed was too low or spin time was inadequate.
Check the centrifuge to ensure that it is capable of generating the required RPMs. Sufficient centrifugal force is required to move the liquid through the resin. Also, ensure that the correct spin times are followed. Spin for an additional minute if necessary.
Bacterial debris in the lysate.
Ensure that the starting material is clarified phage supernatant. Remove bacterial debris from the initial phage supernatant by centrifugation at 10,000 × g for 5 minutes before beginning the protocol.
The lysate/binding solution mixture is not homogeneous.
To ensure a homogeneous solution, vortex for 10-15 seconds before applying the lysate to the spin column.
Centrifuge temperature is too low.
Ensure that the centrifuge remains at room temperature throughout the procedure. Temperatures below 20℃ may cause precipitates to form that can cause the columns to clog.

Why do I have low yield of phage DNA?

The yield of genomic DNA may be lower than expected due to the following:

Ineffective propagation of phage and initial lysis step.
Refer to the manufacturer's recommendations for the propagation of the phage, including proper titer for inoculation, growth conditions, and bacterial host.
Incomplete lysis of cells.
Ensure that the incubation was performed for 15 minutes at 65℃ after the addition of Lysis Buffer B. Also, perform optional digestion with Proteinase K in Step 1b during Lysate Preparation.
Ethanol was not added to the Wash Solution A.
Ensure that 90 mL of 96 - 100% ethanol is added to the supplied Wash Solution A prior to use.
The DNA elution is incomplete.
Ensure that all the DNA is eluted. If elution buffer remains in the column, use 14,000 g for the second centrifuge.

Why is the purified DNA not performing well in downstream applications?

If the DNA does not perform well in downstream applications, it may be due to one or more of the following:

DNA was not washed three times with the provided Wash Solution A.
Traces of salt from the binding step may remain in the sample if the column is not washed three times with the Wash Solution A. Salt may interfere with downstream applications and thus must be washed from the column.
Ethanol carryover.
Ensure that the dry spin under the Column Wash procedure is performed in order to remove traces of ethanol prior to elution. Ethanol is known to interfere with many downstream applications.

Why do I have host genomic DNA contamination in phage DNA elution?

Host genomic DNA can contaminate the phage DNA. In order to eliminate host genomic DNA contamination in the phage DNA elution, it is recommended that a DNase I treatment is performed at the beginning of the lysate preparation procedure (see Section 1, Optional DNase Treatment).

Can this kit isolate phage genomes with ssDNA ?

Yes, the kit can isolate both ssDNA and dsDNA phage genomes.

Can PEG precipitation be used before the Phage DNA isolation kit?

The kit doesn't require PEG precipitation. However, the kit is compatible with PEG precipitated samples.

Citations

Title	Evaluation of bacteriophage therapy of Aeromonas hydrophila infection in a freshwater fish, Pangasius buchanani
Citation	Frontiers in Aquaculture 2023.
Authors	Ritu Kumari, Ragini Yadav, Deepak Kumar, Radha Chaube and Gopal Nath

Title	Genome sequence and characterization of a novel Pseudomonas putida phage, MiCath
Citation	Scientific Reports volume 2023.
Authors	James Jaryenneh, Joseph S. Schoeniger & Catherine M. Mageeney

Title	Expression of a recombinant endolysin from bacteriophage CAP 10-3 with lytic activity against Cutibacterium acnes
Citation	scientific reports 2023.
Authors	Ja-I Kim, Muhammad Adeel Hasnain & Gi-Seong Moon

Title	Genomic characterization of key bacteriophages to formulate the potential biocontrol agent to combat enteric pathogenic bacteria
Citation	Archives of Microbiology 2018.
Authors	Parmar, K. M., Dafale, N. A., Tikariha, H., & Purohit, H. J. (2018).

Title	The genome sequence of Escherichia coli tailed phage D6 and the diversity of Enterobacteriales circular plasmid prophages
Citation	Virology 2018.
Authors	Gilcrease, E. B., & Casjens, S. R. (2018).

Title	Recombinant LysVPMS1 as an endolysin with broad lytic activity against Vibrio parahaemolyticus strains associated to acute hepatopancreatic necrosis disease
Citation	Aquaculture 2018.
Authors	Zermeño-Cervantes, L. A., Makarov, R., Lomelí-Ortega, C. O., Martínez-Díaz, S. F., & Cardona-Félix, C. S

Title	Isolation and Characterization of Bacillus cereus Bacteriophages from Foods and Soil
Citation	Food and Environmental Virology 2017.
Authors	Oh, H., Seo, D. J., Jeon, S. B., Park, H., Jeong, S., Chun, H. S., ... & Choi, C.

Title	Complete Genome Sequences of Three Novel Pseudomonas fluorescens SBW25 Bacteriophages, Noxifer, Phabio, and Skulduggery
Citation	Genome Announcements 2017.
Authors	Wojtus, J. K., Fitch, J. L., Christian, E., Dalefield, T., Lawes, J. K., Kumar, K., ... & Hendrickson, H. L. (2017).

Title	Staphylococcus sciuri bacteriophages double-convert for staphylokinase and phospholipase, mediate interspecies plasmid transduction, and package mecA gene
Citation	Scientific Reports 2017.
Authors	Zeman, M., Mašlanová, I., Indráková, A., Šiborová, M., Mikulášek, K., Bendícková, K., ... & Pantucek, R. (2017).

Title	Complete genome sequence of DU_RP_II, a novel Ralstonia solanacearum phage of the family Podoviridae
Citation	Archives of Virology 2017.
Authors	Park, T. H. (2017).