Integration of repeated sequences (pBR322) in the Bacillus subtilis 168 chromosome without affecting the genome structure

1993 ◽  
Vol 241-241 (3-4) ◽  
pp. 287-297 ◽  
Author(s):  
Mitsuhiro Itaya
2011 ◽  
Vol 57 (5) ◽  
pp. 427-436 ◽  
Author(s):  
Chong Zhang ◽  
Xiaohui Zhang ◽  
Zhengying Yao ◽  
Yaping Lu ◽  
Fengxia Lu ◽  
...  

This study describes a novel method for repeated gene inactivation in Bacillus subtilis 168. A B. subtilis strain (BS-PS) that is conditionally auxotrophic for lysine was obtained by replacing the PlysA promoter with the Pspac promoter. The homologous recombination integration vector PLC-T was constructed to contain lacI, which encodes a Pspac promoter repressor, and the chloromycetin resistance gene. Target genes were manipulated by generating an insertion sequence with two homologous arms and the target gene in PLC-T to create a specific integrating vector. Integration into the BS-PS chromosome occurred by a single crossover at either of the two homologous arms. The resulting transitional strain (BS-PS-PI) was chloromycetin resistant and lysine auxotrophic and had an unstable genome structure because of the duplication. Excision of lacI and chloromycetin resistance gene was achieved by a second single crossover at the duplication. Recovery of a lysine prototroph functioned as counter-selection and was identified by PCR. In this work, we inactivated nprE and aprE, two protease genes secreted by B. subtilis 168 free of selectable markers.


2019 ◽  
Vol 64 (7) ◽  
pp. 1126-1133 ◽  
Author(s):  
A. Nayab ◽  
S. A. Moududee ◽  
Y. Shi ◽  
Y. Jiang ◽  
Q. Gong

2018 ◽  
Vol 657 ◽  
pp. 78-88 ◽  
Author(s):  
Chinmayi R. Kaundinya ◽  
Handanahal S. Savithri ◽  
K. Krishnamurthy Rao ◽  
Petety V. Balaji

Gene ◽  
1991 ◽  
Vol 101 (1) ◽  
pp. 15-21 ◽  
Author(s):  
M. Amjad ◽  
J.M. Castro ◽  
H. Sandoval ◽  
J.-J. Wu ◽  
M. Yang ◽  
...  

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