TOPO™ Cloning in Geneious Prime

This TOPO™ cloning series shows how to simulate all three Geneious Prime methods: TA cloning with a 3'-T overhang vector, Blunt cloning with a custom TOPO site annotation, and Directional cloning using a 4 bp motif like CACC added to a designed primer. TA and Blunt are non-directional and require reverse complementing to test both orientations. Three videos, 2 to 3 minutes each.

Directional TOPO™ Cloning

Blunt TOPO™ Cloning

Create a TOPO annotation on your Blunt TOPO cloning vector, then simulate Blunt cloning with your insert. Reverse complement either sequence first if needed, since this method is non-directional.

LENGTH 2 minutes

Directional TOPO™ Cloning

Design a forward primer with a CACC (or other directional motif) extension matching your vector, extract the PCR product, then simulate Directional TOPO cloning by selecting Directional with overlap and entering the motif sequence.

LENGTH 3 minutes

Perform TOPO™ TA Cloning™

Simulate TOPO TA cloning with a vector containing an auto-detected TOPO site. Geneious adds the 3' overhang automatically, no manual step needed. Reverse complement either sequence if orientation needs adjusting, since this method is non-directional.

LENGTH 2 minutes

Common Questions about TOPO™ Cloning

Which TOPO™ cloning methods does Geneious Prime support?

Geneious Prime supports in silico simulation of all three standard TOPO™ cloning methods: TA Cloning (using vectors with 3′-T overhangs), Blunt TOPO™ Cloning (using custom-annotated TOPO™ sites), and Directional TOPO™ Cloning (using 4-bp extensions for defined insert orientation). All three are available through the same cloning interface and can be selected based on the vector system and directionality requirement of the experiment.

Can I perform batch TOPO™ cloning in Geneious Prime?

Geneious Prime supports batch TOPO™ cloning by selecting multiple compatible vectors or inserts simultaneously. This is useful for screening multiple PCR products against the same TOPO™ vector, or for validating the same insert across different vector systems, without repeating the workflow setup for each combination individually.

What is the difference between Directional and TA TOPO™ cloning in Geneious Prime?

In Geneious Prime, TA and Blunt TOPO™ cloning simulate non-directional insertion — the insert is equally likely to ligate in either orientation, and reverse complements must be manually created to test both possibilities. Directional TOPO™ cloning uses 4-bp primer extensions complementary to vector overhangs, ensuring the insert clones in a single defined orientation. Researchers choosing between methods can simulate both scenarios in Geneious Prime before committing to a protocol.

How does Geneious Prime simulate TA TOPO™ cloning with the pCRII-TOPO vector?

Geneious Prime simulates TA TOPO™ cloning by first annotating the TOPO™ site on the vector using the motif CCCTTAAGGG (used by pCRII-TOPO™). The tool then performs the cloning operation, producing forward and reverse-complement construct variants to account for the non-directional insertion mechanism. Researchers can review both orientations before selecting clones to validate experimentally.

Does Geneious Prime design primers for Directional TOPO™ cloning?

Geneious Prime designs primers for Directional TOPO™ cloning with the specific 4-bp extensions required for directional insertion. For example, the CACC sequence used with pENTR/D-TOPO™ vectors. The tool annotates primer_bind sites, calculates Tm across the extension and gene-specific regions, and validates the primer set against the target sequence before synthesis.

Is TOPO™ cloning simulation available in all Geneious Prime subscription plans?

TOPO™ cloning simulation (including Blunt, TA, and Directional methods) is available in all Geneious Prime subscription plans. A free trial is available with no purchase commitment required. TOPO™ and Life Technologies™ are trademarks of Thermo Fisher Scientific and its subsidiaries.