Table 2.
Estimated protein copy numbers in Escherichia coli during active growth compared to the stationary phase.
| Protein | Active growth (LB) | Stationary phase (1 day) |
|---|---|---|
| Protein copy number per cell | ||
| Ribosomes (ribosomal proteins) | ||
| Ribosomal protein uL1 | 28,189 | 2,255 |
| Ribosomal protein uS2 | 36,238 | 2,432 |
| Translation factors | ||
| EF-G | 31,959 | 1,874 |
| EF-Tu | 103,701 | 6,165 |
| Hibernation factors | ||
| RMF | 199 | 3,538 |
| RaiA | 7,880 | 11,711 |
| HPF | 1,991 | 4,011 |
| YqjD | 2,203 | 6,209 |
| ElaB | 1,968 | 4,052 |
| YgaM | 756 | 793 |
| Sra | 640 | 5,851 |
| Other factors involved in ribosomal stress response | ||
| RelA | 12 | 2 |
| SmpB (tmRNA) | 38 | 12 |
| Etta (yjjK) | 2,984 | 203 |
| RsfA (ybeB) | 2,813 | 480 |
| Factors of RNA/ribosome degradation | ||
| Rnase R | 61 | 7 |