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Pht01

pHT01 is a plasmid used as a cloning vector for expressing proteins in Bacillus subtilis. It is 7,956 base pairs in length.[1] pHT01 carries Pgrac, an artificial, strong, IPTG-inducible promoter consisting of the Bacillus subtilis groE promoter, a lac operator, and the gsiB ribosome binding site. It was first found on plasmid pNDH33. The plasmid also carries replication regions from the pMTLBs72.[2] The plasmid also carries genes to confer resistance to ampicillin and chloramphenicol.

Plasmid pHT01 is generally stable in both B. subtilis and Escherichia coli, and can be used for protein expression in these host strains. pNDH33/pHT01 have been used to produce up to 16% of total protein output in B. subtilis. Pgrac100 is an improved version of Pgrac, which can produce up to 30% of total cellular proteins in B. subtilis.[3]

References

  1. ^ Nguyen, H.D.; et al. (2007). "Expression Vectors for the Rapid Purification of Recombinant Proteins in Bacillus subtilis". Current Microbiology. 55 (2): 89–93. doi:10.1007/s00284-006-0419-5. PMID 17624574. S2CID 2299408.
  2. ^ Titok, M. A.; et al. (2003). "Bacillus subtilis soil isolates: plasmid replicon analysis and construction of a new theta-replicating vector". Plasmid. 49 (1): 53–62. doi:10.1016/s0147-619x(02)00109-9. PMID 12584001.
  3. ^ Phan, T.P.T.; Nguyen, H.D.; Schumann, W. (2006). "Novel plasmid-based expression vectors for intra- and extracellular production of recombinant proteins in Bacillus subtilis". Protein Expression and Purification. 46 (2): 189–195. doi:10.1016/j.pep.2005.07.005. PMID 16125412.


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