License: This is an open access protocol distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited
Protocol status: Working
We use this protocol and it's working
Created: March 11, 2025
Last Modified: March 19, 2025
Protocol Integer ID: 124321
Keywords: ASAPCRN
Funders Acknowledgements:
Aligning Science Across Parkinson's
Grant ID: ASAP-000282
Abstract
This protocol details how to clone DNA plasmids by Gibson assembly (New England Biolabs, E2621), an exonuclease-based method to easily assemble DNA in the correct order.
Materials
Wizard SV Gel and PCR Clean-Up SystemPromegaCatalog #A9281
NEBuilder HiFi DNA Assembly Master MixNew England BiolabsCatalog #E2621
Purification of DNA Fragments
Purification of DNA Fragments
Prepare the DNA fragments by digestion with restriction enzyme or PCR amplification.
Note
DNA fragments can be also synthesized by companies like Twist Bioscience.
Ensure that the DNA fragments have overlapping ends of 15-20 base pairs.
Purify the DNA fragments by agarose gel electrophoresis, followed by excision of the corresponding band and extracting the DNA from the gel piece using a clean-up system like the Wizard SV Gel and PCR Clean-Up System.
Determine the DNA concentrations with a Nanodrop spectrophotometer.
Gibson Assembly
Gibson Assembly
1h
1h
For a reaction with 2-3 fragments, prepare the following mixture On ice, Molar ratio vector:insert = 1:2
50 ng of vector (or bigger DNA fragment) + double in pmol of insert(s) + 10 µL NEBuilder HiFi DNA Assembly Master Mix + to 20 µL deionized H2O.
Note
pmols = (weight in ng) x 1,000 / (base pairs x 650 Daltons)
For other number of fragments and other detailed information please refer to, https://www.neb.com/en/protocols/2014/11/26/nebuilder-hifi-dna-assembly-reaction-protocol
Other total reaction volume can be set as far as the Master Mix (2x) is diluted to a final concentration of 1x.
Incubate at 50 °C for 01:00:00.
1h
Place the reaction On ice.
Transform 50 µL of competent bacteria with 2 µL of the Gibson assembly reaction.
Note
Use of NEB Stable Competent E. coli (High Efficiency) increases the efficiency of the cloning.