Golden Gate Assembly
Golden Gate Assembly in SnapGene
Common Questions About Using SnapGene
What does SnapGene's Golden Gate Assembly simulation do?
SnapGene designs PCR primers incorporating Type IIS restriction enzyme sites to generate custom overhangs, predicts assembly fidelity, and produces a verified product file. The default enzyme is BsaI. History view records all simulated steps, and History colors distinguish each inserted fragment.
Which Type IIS enzymes are available for Golden Gate Assembly in SnapGene?
The Golden Gate Assembly tool provides a default list of 9 commonly used Type IIS enzymes, with BsaI as the default. You can access the full database of Golden Gate-compatible Type IIS enzymes and customize both the list and the default enzyme via Actions → Golden Gate Assembly → Golden Gate Settings.
How does SnapGene predict Golden Gate assembly fidelity?
SnapGene calculates assembly fidelity by multiplying the predicted ligation fidelity of all unique overhangs used in the reaction. Fidelity prediction uses the Potapov et al. (2018) dataset for T4 DNA ligase and is available for assemblies using 3- or 4-nucleotide overhangs. Fidelity cannot be estimated for Type IIS enzymes that create 1, 2, or 5+ nucleotide overhangs.
How does SnapGene select overhangs for Golden Gate Assembly?
SnapGene automatically selects the overhang with the highest predicted fidelity at each junction. Clicking Adjust Overhangs shows the available alternatives and a matrix of predicted overhang interactions (mispairings) for all overhangs in the reaction. If you choose an alternative overhang, SnapGene designs new primers accordingly.
Does SnapGene warn about palindromic overhangs in Golden Gate Assembly?
Yes. If any selected overhangs are palindromic, SnapGene warns that this will reduce assembly fidelity by allowing insert-insert and vector-vector ligation. The predicted fidelity percentage is shown so you can assess whether the assembly is likely to succeed before committing to bench work.
What is the difference between this simulation series and the Golden Gate Assembly topic guide?
The simulation series covers the software workflow: setting up the reaction in SnapGene, selecting the Type IIS enzyme, reviewing overhang fidelity, and generating a product file. The Golden Gate Assembly topic guide explains the technique itself: how Type IIS enzymes cut outside their recognition sequences to generate custom overhangs, the advantages of the method for multi-fragment assembly, and key design considerations.
Explore More SnapGene Resources
