Product Class: Kit

NEBridge® Golden Gate Assembly Kit (BsaI-HF® v2)

Complement this kit with NEBridge Golden Gate Assembly Kit (BsmBI-v2) (NEB #E1602)

Product Introduction

Learn about Ligase Fidelity and Push the Limits of Golden Gate Assembly (50+ fragments)

  • Updated to include BsaI-HFv2 (optimized for Golden Gate)
  • Seamless cloning – no scar remains following assembly
  • Includes destination plasmid with T7/SP6 promoters
  • Ordered assembly of multiple fragments (2-50+) in a single reaction
  • Can also be used for cloning of single inserts and library preparations
  • Efficient with regions with high GC content and areas of repeats
  • Compatible with a broad range of fragment sizes (< 100 bp to > 15 kb)
  • Free tool available at GoldenGate.neb.com
  • Try our Ligase FidelityTools (for the design of high-fidelity Golden Gate Assemblies)
Catalog # Size Concentration
E1601S 20.0 reactions
E1601L 100.0 reactions

Featured Videos

View Video Library
  • GoldenGateAssemblyWorkflow_720

    Golden Gate Assembly Workflow

  • NEBTV_Ep8_video_thumb

    NEB® TV Ep. 8 – Cloning and DNA Assembly

  • NEBTV 12

    NEB® TV Ep. 12 – Applications of DNA Assembly

  • NEBTV_Ep1_VideoThumb

    NEB® TV Ep. 1 – Synthetic Biology

  • KuceraBecky

    Restriction Enzymes in Golden Gate Assembly

Product Information

Description

The NEBridge Golden Gate Assembly Kit (BsaI-HFv2) contains an optimized mix of BsaI-HFv2 and T4 DNA Ligase. Together these enzymes can direct the assembly of multiple inserts/modules using the Golden Gate approach. Also included is the pGGAselect destination plasmid, which provides a backbone for your assembly, features convenient restriction enzyme sites for subcloning, and has T7/SP6 promoter sequences to enable in vitro transcription.

The efficient and seamless assembly of DNA fragments, commonly referred to as Golden Gate assembly (1,2), has its origins in 1996, when for the first time it was shown that multiple inserts could be assembled into a vector backbone using only the sequential (3) or simultaneous (4) activities of a single Type IIS restriction enzyme and T4 DNA Ligase.

Type IIS restriction enzymes bind to their recognition sites but cut the DNA downstream from that site at a positional, not sequence-specific, cut site. Thus, a single Type IIS restriction enzyme can be used to generate DNA fragments with unique overhangs. As an example, BsaI has a recognition site of GGTCTC(N1/ N5), where the GGTCTC represents the recognition/binding site, and the N1/ N5 indicates the cut site is one base downstream on the top strand, and five bases downstream on the bottom strand. Assembly of digested fragments proceeds through annealing of complementary four base overhangs on adjacent fragments. The digested fragments and the final assembly no longer contain Type IIS restriction enzyme recognition sites, so no further cutting is possible. The assembly product accumulates with time. 

While particularly useful for multi-fragment assemblies such as Transcription Activator Like Effectors (TALEs)(5) and TALEs fused to a FokI nuclease catalytic domain (TALENs)(6), the Golden Gate method can also be used for cloning of single inserts and inserts from diverse populations that enable library creation. To learn more about the Golden Gate Assembly workflow, watch this video tutorial.

To help select the best DNA assembly method for your needs, please use our Synthetic Biology/DNA Assembly Selection Chart.

Please note that while general descriptions regarding Golden Gate Assembly use the BsaI nomenclature, this kit and protocols feature the specific engineered form optimized for Golden Gate Assembly, BsaI-HFv2.

Figure 1: Overview: Assembly Protocol of Golden Gate Assembly



Figure 2: Golden Gate Workflow
In its simplest form, Golden Gate Assembly requires a Type IIS recognition site, in this case, BsaI-HFv2 (GGTCTC), added to both ends of a dsDNA fragment. After digestion, these sites are left behind, with each fragment bearing the designed 4-base overhangs that direct the assembly.


Figure 3: Golden Gate Assembly of 24 fragments can be achieved with high efficiency and accuracy
Twenty-four fragment assemblies of the lacI/lacZ cassette were performed using the protocol included in this article. While 30 cycles is sufficient to achieve 24 fragment assemblies, the stability of the BsaI-HFv2 and T4 DNA Ligase allows continued assembly through 45 and 60 cycles with a low background. (a) Efficiency of assembly and (b) accuracy of assembly versus cycle number.


Figure 4.



pGGA is a 2,200 bp cloning vector useful for Golden Gate Assembly. The plasmid contains two BsaI sites; digestion with BsaI releases a 87 bp fragment and a 2,133 bp vector backbone fragment to receive your insert or assembly.
This product is related to the following categories:
DNA Assembly, Cloning and Mutagenesis Kits Products
This product can be used in the following applications:
DNA Assembly and Cloning,
High-throughput cloning and automation solutions,
NEBridge® Golden Gate Assembly

Kit Components

Kit Components

The following reagents are supplied with this product:

NEB # Component Name Component # Stored at (°C) Amount Concentration

Properties & Usage

Materials Required but not Supplied

  • User-defined inserts
  • Competent cells
  • Other materials for transformation

Features

  • Seamless cloning – no scar remains following assembly
  • Ordered assembly of multiple fragments in a single reaction
  • Can also be used for cloning of single inserts
  • Efficient with regions with high GC content and areas of repeats
  • Compatible with a broad range of fragment sizes (< 100 bp to > 15 kb)
  • Free tool available at GoldenGate.neb.com
  • 2 year shelf life

References

  1. Engler, C. et al (2008). PLoS ONE. 3: e3647.
  2. Engler, C. et al (2009). PLoS ONE. 4: e5553.
  3. Lee, J.H. et al (1996). Genetic Analysis: Biomolecular Engineering. 13; 139-145.
  4. Padgett, K.A. and Sorge, J.A. (1996). Gene. 168, 31-35.
  5. Weber, E. et al (2001). PLoS ONE. 6; e19722.
  6. Christian, M. et al (2010). Genetics. 186, 757-761.
  7. Potapov, V. et al. (2018). Comprehensive Profiling of Four Base Overhang Ligation Fidelity by T4 DNA Ligase and Application to DNA Assembly. ACS Synth. Biol. 7, 11, 2665-2674. DOI: 10.1021/acssynbio.8b00333,

Protocols, Manuals & Usage

Protocols

  1. Golden Gate Assembly Protocol for Using NEBridge® Golden Gate Assembly Kit (BsaI-HF®v2) (E1601)
  2. Transformation Protocol for Using NEBridge® Golden Gate Assembly Kit (BsaI-HF®v2) (E1601)
  3. Recommended Screening Protocols for Using NEBridge® Golden Gate Assembly Kit (BsaI-HF®v2)
  4. 52-Fragment Golden Gate Assembly using BsaI-HF®v2 (NEB #E1601)

Manuals

The Product Manual includes details for how to use the product, as well as details of its formulation and quality controls.

Application Notes

Tools & Resources

Selection Charts

Web Tools

FAQs & Troubleshooting

FAQs

  1. Why does the Golden Gate Assembly Mix now feature BsaI-HFv2?
  2. What is the mechanism for Golden Gate Assembly?
  3. What affects the efficiency of Golden Gate Assembly?
  4. Why do many of the published Golden Gate Assembly articles feature precloned inserts as opposed to inserts generated by PCR?
  5. Using purified amplicons directly without precloning seems much easier, but is the assembly efficiency decreased?
  6. Can PCR amplicons be used directly in assembly reactions without purification?
  7. Why is Golden Gate also used for single insert cloning?
  8. What if there are internal BsaI and BsmBI sites in my insert sequences?
  9. Why do assembly reactions end with a 5 minute, 60°C incubation step?
  10. How can I minimize PCR-generated errors in my amplicon inserts?
  11. Can the Golden Gate Assembly reactions be scaled down?
  12. Can I use other competent E. coli strains than NEB 10-beta? Can I use subcloning efficiency cells?
  13. What is an appropriate negative control for Golden Gate Assembly?
  14. How many cycles are optimal?
  15. Which kit from NEB should I use for Golden Gate Assembly—the BsmBI-v2 kit (NEB #E1602) or the original BsaI-HFv2 kit (NEB #E1601)?
  16. Why is Golden Gate also used for single insert cloning?
  17. How can I access pGGAselect as a GenBank or FASTA file?
  18. Will EDTA interfere with downstream BsaI restriction and ligation?
  19. Why is there a 55°C, 5 min heat step at the end of the assembly reaction?
  20. How many base pairs should my amplicon inserts have flanking the Type IIS restriction site?

Tech Tips

Use of the NEB Golden Gate Assembly Tool (GoldenGate.neb.com) is strongly recommended; this tool will check insert sequences for internal Type IIS restriction enzyme sites and design primers to amplify your inserts for Golden Gate Assembly. The primers will feature 6 bases at the 5′ end flanking the recognition site, the recognition site itself, plus the 4-base overhangs that determine correct annealing and ligation of the inserts. All overhangs will automatically be designed as non-palindromic (to eliminate self-insert ligations), unique, and in the correct orientations to ensure correct assembly.

 

Research at NEB has led to an increased understanding of ligase fidelity, including the development of a comprehensive method for profiling end-joining ligation fidelity in order to predict which overhangs will result in greater accuracy (Potapov, V. et al. (2018) ACS Synth. Biol., 7, 2665–2674.). This ligase fidelity information can be used in conjunction with the NEB Golden Gate Assembly kits to achieve high efficiency and accurate complex assemblies. Please visit www.neb.com/GoldenGate for more information.

 

NEB has developed ligase fidelity tools to facilitate the design of high-fidelity Golden Gate Assemblies:

  • NEBridge Ligase Fidelity Viewer® – visualize overhang ligation preferences
  • NEBridge GetSet® – predict high-fidelity junction sets
  • NEBridge SplitSet® – split DNA sequence for scarless high-fidelity assembly

All tools are available at ligasefidelity.neb.com

Standard Golden Gate protocol suggests using 30 cycles, alternating between restriction and cutting. BsaI-HFv2, BsmBI-v2 and T4 DNA Ligase are very stable, allowing cycling up to 60 cycles, with high efficiency and fidelity. Consider whether your workflow would be enhanced by adding more cycles.

Quality, Safety & Legal

Quality Assurance Statement

Quality Control tests are performed on each new lot of NEB product to meet the specifications designated for it. Specifications and individual lot data from the tests that are performed for this particular product can be found and downloaded on the Product Specification Sheet, Certificate of Analysis, data card or product manual. Further information regarding NEB product quality can be found here.

Specifications

The Specification sheet is a document that includes the storage temperature, shelf life and the specifications designated for the product. The following file naming structure is used to name these document files: [Product Number]_[Size]_[Version]

Certificate Of Analysis

The Certificate of Analysis (COA) is a signed document that includes the storage temperature, expiration date and quality controls for an individual lot. The following file naming structure is used to name these document files: [Product Number]_[Size]_[Version]_[Lot Number]

Safety DataSheets

The following is a list of Safety Data Sheet (SDS) that apply to this product to help you use it safely.

Legal and Disclaimers

Products and content are covered by one or more patents, trademarks and/or copyrights owned or controlled by New England Biolabs, Inc (NEB). The use of trademark symbols does not necessarily indicate that the name is trademarked in the country where it is being read; it indicates where the content was originally developed. The use of this product may require the buyer to obtain additional third-party intellectual property rights for certain applications. For more information, please email busdev@neb.com.

This product is intended for research purposes only. This product is not intended to be used for therapeutic or diagnostic purposes in humans or animals.

New England Biolabs (NEB) is committed to practicing ethical science – we believe it is our job as researchers to ask the important questions that when answered will help preserve our quality of life and the world that we live in. However, this research should always be done in safe and ethical manner. Learn more.

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