A new vector for insertion of any DNA fragment into the chromosome of transformable Neisseriae
Related Experiment Video
Updated: Oct 10, 2026

Site-specific Bacterial Chromosome Engineering: ΦC31 Integrase Mediated Cassette Exchange (IMCE)
Published on: March 16, 2012
P Salvatore1, G Cantalupo, C Pagliarulo
1Dipartimento di Biologia e Patologia Cellulare e Molecolare "L. Califano,", Università di Napoli "Federico II,", Centro di Endocrinologia ed Oncologia Sperimentale "G. Salvatore" of the Consiglio Nazionale delle Ricerche, Naples, Italy.
Abstract:
A useful method for inserting any DNA fragment into the chromosome of Neisseriae has been developed. The method relies on recombination-proficient vector plasmid pNLE1, a pUC19 derivative containing (1) genes conferring resistance to ampicillin and erythromycin, as selectable markers; (2) a chromosomal region necessary for its integration into the Neisseria chromosome; (3) a specific uptake sequence which is required for natural transformation; (4) a promoter capable of functioning in Neisseria; and (5) several unique restriction sites useful for cloning. pNLE1 integrates into the leuS region of the neisserial chromosome at high frequencies by transformation-mediated recombination. The usefulness of this vector has been demonstrated by cloning the tetracycline-resistance gene (tet) and subsequently inserting the tet gene into the meningococcal chromosome.
More Related Videos
Related Concept Videos
Bacterial Transformation
Transduction
Transformation
DNA-only Transposons
The donor site from where the transposon is excised is either degraded or...
Conservative Site-specific Recombination and Phase Variation
The recognition sites for Cre recombinase called LoxP...
DNA Bacteriophages

