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Complete genome sequence of the prototype lactic acid bacterium Lactococcus lactis subsp. cremoris MG1363
Udo Wegmann1, Mary O'Connell-Motherway, Aldert Zomer
1Department of Molecular Genetics, Groningen Biomolecular Sciences and Biotechnology Institute, University of Groningen, Kerklaan 30, 9751 NN Haren, The Netherlands.
Journal of Bacteriology
|February 20, 2007
Summary
The genome of Lactococcus lactis subsp. cremoris MG1363, crucial for global nutrition, has been sequenced. This provides insights into its carbohydrate metabolism and genetic makeup, aiding further research.
Area of Science:
- Microbiology
- Genomics
- Food Science
Background:
- Lactococcus lactis is vital for global nutrition, with strain MG1363 being extensively studied.
- Understanding the genetic makeup of L. lactis MG1363 is key to optimizing its use in food production and research.
Purpose of the Study:
- To present the complete genome sequence of Lactococcus lactis subsp. cremoris MG1363.
- To analyze the genomic features, including protein-encoding genes, pseudogenes, and mobile genetic elements.
Main Methods:
- Whole-genome sequencing of L. lactis MG1363.
- Bioinformatic analysis of the genome sequence to identify genes, pseudogenes, and insertion elements.
- Comparative genomics with other L. lactis strains.
Main Results:
- The genome sequence of L. lactis MG1363 is 2,529,478 bp, encoding 2,436 proteins and 81 pseudogenes.
- The "carbohydrate metabolism and transport" category (COG) contains the largest number of novel proteins (47).
- A specific 56-kb region acts as an integration hot spot, containing plasmid-associated genes and a repeat sequence found in Streptococcus thermophilus.
Conclusions:
- The genome sequence of L. lactis MG1363 enhances its status as a model organism in lactic acid bacteria research.
- The findings facilitate further applied and fundamental research into L. lactis.
- The identified genetic features, including the hot spot and prophages, offer avenues for future investigation.
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