pELMO, an optimised in-house cloning vector

Andrea E. Ramos, Claudia Marina Muñoz, Darwin A. Moreno-Pérez, Manuel A. Patarroyo

Research output: Contribution to journalArticlepeer-review

8 Scopus citations


DNA cloning is an essential tool regarding DNA recombinant technology as it allows the replication of foreign DNA fragments within a cell. pELMO was here constructed as an in-house cloning vector for rapid and low-cost PCR product propagation; it is an optimally designed vector containing the ccdB killer gene from the pDONR 221 plasmid, cloned into the pUC18 vector’s multiple cloning site (Thermo Scientific). The ccdB killer gene has a cleavage site (CCC/GGG) for the SmaI restriction enzyme which is used for vector linearisation and cloning blunt-ended products. pELMO transformation efficiency was evaluated with different sized inserts and its cloning efficiency was compared to that of the pGEM-T Easy commercial vector. The highest pELMO transformation efficiency was observed for ~500 bp DNA fragments; pELMO vector had higher cloning efficiency for all insert sizes tested. In-house and commercial vector cloned insert reads after sequencing were similar thus highlighting that sequencing primers were designed and localised appropriately. pELMO is thus proposed as a practical alternative for in-house cloning of PCR products in molecular biology laboratories.

Original languageEnglish (US)
Article number26
JournalAMB Express
Issue number1
StatePublished - Dec 1 2017

All Science Journal Classification (ASJC) codes

  • Biophysics
  • Applied Microbiology and Biotechnology


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