What is the SEVA format?
The SEVA format involves a set of rules for the physical assembly of the three basic components of plasmid vectors (origin of replication, selection marker and the business cargo) as well as a fixed nomenclature for the designation of the corresponding constructs
Each of the naturally-occurring sequences destined for the various constructs are minimized to the shortest DNA sequence that retains functionality. Furthermore, the sequences are erased of any of the following restriction sites: HindIII, PstI, XbaI, BamHI, SmaI, KpnI, SacI, SalI, EcoRI, SfiI, SphI, AvrII, PshAI, SwaI, AscI, FseI, PacI, SpeI, SanDI and NotI. Finally each of the modules is flanked by fixed, rare restriction sites: origin of replication by FseI and AscI; antibiotic marker by SwaI and PshA; and the cargo by PacI and SpeI.
For the nomenclature of vectors that follow the SEVA standard, see the section below.
(MARTÍNEZ-GARCÍA E. et al, SEVA 2.0: an update of the Standard European Vector Architecture for de-/re-construction of bacterial functionalities. Nucleic Acids Res) Article
What is the added value of adopting the SEVA format and SEVA vectors?
We need to adopt a standard to engineer predictable and efficacious bacteria. The SEVA format is a good candidate to fill this gap: it enables the exchangeability of diverse elements (origins of replication, antibiotic selection markers) and the combination with many cargo molecules for varied end-applications.
The starting point of this collection is SEVA-DB. Future expansion of this core is under its way through the collaboration of a growing list of partners
Contributing new SEVA constructs to the plasmid repository
If you wish to contribute with your favourite module please follow these simple rules:
1- Remove, if any, the following restriction sites from your sequence: HindIII, PstI, XbaI, BamHI, SmaI, KpnI, SacI, SalI, EcoRI, SfiI, SphI, AvrII, PshAI, SwaI, AscI, FseI, PacI, SpeI, SanDI and NotI.
2- Flank your module with the appropriate restriction sites:
– Origin of replication by FseI and AscI.
– Antibiotic marker: SwaI and PshA.
– Cargoes: PacI and SpeI. The major transcriptional flow encoded in this segment must follow the
direction PacI ➔ SpeI.
3- Adhere to Open Access policy and send your new construct (plasmid and strain) to us for inclusion in the SEVA database, where we will assign a code according the SEVA rules.
Contributors to the collection of SEVA vectors must be accredited by the curators of the platform to follow the standards specified above, stored in the SEVA repository and assigned a definitive code prior to public release. Users are discouraged to assign SEVA codes that are not explicitly endorsed by the SEVA-DB managers.
More info about SEVA plasmids
You can read more about SEVA plasmids in the following papers:
- Silva-Rocha, R., Martínez-García, E., Calles, B., Chavarría, M., Arce-Rodríguez, A., de Las Heras, A., … & de Lorenzo, V. (2013). The Standard European Vector Architecture (SEVA): a coherent platform for the analysis and deployment of complex prokaryotic phenotypes. Nucleic acids research, 41(D1), D666-D675. DOI: 10.1093/nar/gks1119
- Martínez-García, E., Aparicio, T., Goñi-Moreno, A., Fraile, S., & de Lorenzo, V. (2015). SEVA 2.0: an update of the Standard European Vector Architecture for de-/re-construction of bacterial functionalities. Nucleic acids research, 43(D1), D1183-D1189. DOI: 10.1093/nar/gku1114
- Martínez-García, E., Goñi-Moreno, A., Bartley, B., McLaughlin, J., Sánchez-Sampedro, L., Pascual del Pozo, H., … & de Lorenzo, V. (2020). SEVA 3.0: an update of the Standard European Vector Architecture for enabling portability of genetic constructs among diverse bacterial hosts. Nucleic acids research, 48(D1), D1164-D1170. DOI: 0.1093/nar/gkz1024
- García‐Gutiérrez, C., Aparicio, T., Torres‐Sánchez, L., Martínez‐García, E., de Lorenzo, V., Villar, C. J., & Lombó, F. (2020). Multifunctional SEVA shuttle vectors for actinomycetes and Gram‐negative bacteria. MicrobiologyOpen, 9(6), 1135-1149. DOI: 10.1002/mbo3.1024
- Durante-Rodríguez, G., Lorenzo, V. D., & Martínez-García, E. (2014). The standard European vector architecture (SEVA) plasmid toolkit. In Pseudomonas Methods and Protocols (pp. 469-478). Humana Press, New York, NY. DOI: 10.1007/978-1-4939-0473-0_36
- Martínez-García, E., Benedetti, I., Hueso, A., & De Lorenzo, V. (2015). Mining environmental plasmids for synthetic biology parts and devices. Microbiology Spectrum, 3(1), 3-1. DOI: 10.1128/microbiolspec.PLAS-0033-2014
- Nikel, P. I., Benedetti, I., Wirth, N. T., de Lorenzo, V., & Calles, B. (2022). Standardization of regulatory nodes for engineering heterologous gene expression: a feasibility study. Microbial Biotechnology. DOI: 10.1111/1751-7915.14063