Table 3.
Whole genome sequencing results of M. bovis BCG spontaneous resistant mutants raised against HTB-03 and HTB-04. High frequency single nucleotide polymorphisms resulting in changes in the amino acid sequence are reported. Genomic positions of the SNP are relative to M. bovis BCG strain Pasteur 1173P2. The base changes (deletions, insertions or substitutions) are capitalized. The amino acid changes are documented, where *1, *2, *3 and *4 represent the generation of a stop codon, amino acid deletions, insertion of a base leading to an amino acid change and a subsequent frameshift, and amino acid insertions. Spontaneous resistant mutants are numbered and the MIC at which they were generated is shown. Dots represent areas where sequence coverage was not sufficient for analysis. Blank spaces indicate the absence of a base change relative to the reference strain.
| Gene | Genome position of SNP | Codon change | Amino acid changes | Frequency of SNP | HTB-03 Mutants |
HTB-04 Mutants |
||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 50 × MIC |
100 × MIC |
20 × MIC |
||||||||||
| 1 | 2 | 1 | 2 | 3 | 1 | 2 | 3 | |||||
| BCG_0220 | 244,283 | taT/taG | Y99*1 | 98.86 | G | |||||||
| 244,393 | GTGGCGGCACAGgac/gac | VAAQD137D*2 | 97.09 | GTGGCGGCACAG | GTGGCGGCACAG | GTGGCGGCACAG | GTGGCGGCACAG | |||||
| 244,500 | Tct/Cct | S172P | 100 | C | ||||||||
| BCG_0404c | 475,202 | Gcc/Acc | A143T | 100 | A | A | A | A | A | A | ||
| Non-coding region | 1,344,671 | C/G | – | 100 | G | G | G | G | G | G | G | G |
| 1,344,672 | G/C | – | 100 | C | C | C | C | C | C | C | C | |
| PE_PGRS28 | 1,661,298 | Gcc/Acc | A651T | 100 | . | A | . | . | . | A | . | . |
| 1,661,300 | gTc/gGc | V650G | 100 | . | G | . | . | . | G | . | . | |
| 1,661,303 | aTc/aAc | I649N | 100 | . | A | . | . | . | A | . | . | |
| 1,661,304 | Atc/Gtc | I649V | 100 | . | G | . | . | . | G | . | . | |
| 1,661,306 | aTc/aGc | I648S | 100 | . | G | . | . | . | G | . | . | |
| 1,661,307 | Atc/Gtc | I648V | 100 | . | G | . | . | . | G | . | . | |
| 1,661,309 | gAc/gGc | D647G | 100 | . | G | . | . | . | G | . | . | |
| pks12 | 2,282,655 | Ggt/Agt | G2662S | 100 | ||||||||
| 2,282,656 | tgG/tgA | W2661*1 | 100 | |||||||||
| proB | 2,702,724 | Gcc/Tcc | A232S | 100 | T | |||||||
| fadD28 | 3,237,397 | ttt/ttAt | F25L*3 | 100 | TA | TA | TA | TA | TA | TA | ||
| BCG_3499c | 3,833,488 | gcc/gcGGCc | A433AA*4 | 100 | GGC | GGC | GGC | GGC | GGC | GGC | GGC | |
| cut3 | 3,854,969 | ggc/gGTCgc | G261GR*4 | 100 | GTC | GTC | GTC | GTC | GTC | GTC | GTC | |
| PE_PGRS53 | 3,907,860 | Aac/Gac | N599D | 100 | G | G | G | G | G | G | G | G |
| PE_PGRS57 | 3,927,720 | Acc/Gcc | T598A | 100 | G | . | . | . | . | G | . | . |
| BCG_3742 | 4,098,093 | gaC/gaA | D188E | 100 | A | A | A | A | A | A | ||
| glpK | 4,111,717 | ttG/ttC | L385F | 100 | C | C | C | C | C | C | ||