Lactococcus lactis is a non-motile, Gram-positive coccus in the family Streptococcaceae, best known as the principal starter organism in the production of cheese, buttermilk, and other fermented dairy products. It is generally recognised as safe (GRAS) and is widely used as a model organism for lactic acid bacteria research and as a chassis for recombinant protein expression. The genome of L. lactis (~2.3-2.6 Mb) varies considerably between dairy and plant-associated strains, with the dairy lineages showing genome decay driven by adaptation to milk.
Derived from 339 genomes: 111 from RefSeq and 228 from other sources. For the derivation pipeline and the PASS / WARN / FAIL verdict model, see the methods page for qualibact-v1.0.
This table summarises the distribution of each metric, including standard deviation, mean, median, and percentiles.
A combined summary table across all species is available on the summary page.
| Metric | Distribution | n | Mean | SD | Min | Q1 | Median | Q3 | Max |
|---|---|---|---|---|---|---|---|---|---|
| N50 | non-normal | 228 | 179,465 | 107,331 | 14,158 | 84,229 | 168,048 | 227,458 | 458,242 |
| no_of_contigs | non-normal | 228 | 104.13 | 56.79 | 21 | 71 | 82 | 120 | 331 |
| longest | normal | 228 | 376,616 | 132,732 | 70,530 | 243,077 | 399,916 | 465,450 | 746,529 |
| GC_Content | non-normal | 228 | 35.09 | 0.17 | 34.66 | 34.96 | 35.11 | 35.24 | 35.43 |
| Completeness_Specific | non-normal | 228 | 100 | 0 | 99.98 | 100 | 100 | 100 | 100 |
| Contamination | non-normal | 228 | 0.51 | 0.34 | 0.05 | 0.35 | 0.44 | 0.54 | 1.88 |
| Total_Coding_Sequences | normal | 228 | 2,565 | 151.71 | 2,102 | 2,489 | 2,576 | 2,625 | 2,941 |
| Genome_Size | normal | 228 | 2,516,310 | 117,455 | 2,150,170 | 2,458,829 | 2,531,169 | 2,559,889 | 2,836,550 |
Full statistics including KS test vs RefSeq and Wasserstein distance are in the downloadable summary.csv.
Derived from 339 genomes including 111 RefSeq references
Both Fail and Warn bands shown as the published rounded values — easier to cite and consistent across the species page, CSV downloads, and downstream QC tools.
| Metric | Fail below | Warn below | Warn above | Fail above |
|---|---|---|---|---|
| Genome_Size | - | - | - | - |
| GC_Content | - | - | - | - |
| Total_Coding_Sequences | - | - | - | - |
| Completeness_Specific | - | - | - | - |
| Contamination | - | - | - | - |
| N50 | - | - | - | - |
| no_of_contigs | - | - | - | - |
| longest | - | - | - | - |
How to read this: A value outside a failure limit fails QC. Within the failure limits, values beyond a warning limit are borderline and worth a manual look; values within the warning limits pass that criterion. A dash means that no bound is defined on that side.