Research Article

Expression of Heterologous Cellulases in Thermotoga sp. Strain RQ2

Table 2

Strains and vectors used in this study.

Strain or plasmidDescriptionReference

E. coli
 DH5αF  endA1  hsdR17  (rk,  mk+)  supE44  thi-1  λ  recA1  gyrA96   relA1  deoR  Δ(lacZYA-argF)-U169ϕ80dlacZΔM15[24]
Thermotoga
T. sp. strain RQ2Isolated from geothermally heated sea sediment, Ribeira Quente, Săo Miguel, Azores.[25]
T. maritima MSB8The first type strain of Thermotoga, isolated from geothermally heated sea sediments, Porto di Levante, Vulcano, Italy.[25]
Caldicellulosiruptor
C. saccharolyticus DSM 8903Isolated from wood in the flow of geothermal spring, Taupo, New Zealand.[14]
Plasmids
 pDH10Thermotoga-E. coli shuttle vector; Apr, [23]
 pDH26pDH10-derived, with BsaI site erased; Apr, KanrThis study
 pDH27pDH26-derived, with NdeI site erased; Apr, KanrThis study
 pHX01pDH27-derived, having lacZ residual sequence removed; Apr, KanrThis study
 pHX02.1Promoter and signal peptide region of TM1840 (amyA) were inserted into the NotI-SacI sites of pHX01; Apr, KanrThis study
 pHX02Coding region (without the signal peptide) of Csac_1078 (celB) was inserted into BsaI-SacI sites of pHX02.1; Apr, KanrThis study
 pHX04.1Promoter and signal peptide region of TM0070 (xynB) were inserted into the NotI-SacI sites of pHX01; Apr, KanrThis study
 pHX04Coding region (without the signal peptide) of Csac_1078 (celB) was inserted into the BsaI-SacI sites of pHX04.1; Apr, KanrThis study
 pHX07.1Promoter and signal peptide region of TM0070 (xynB) were inserted into the XhoI-PstI sites of pHX01; Apr, KanrThis study
 pHX07Coding region (without the signal peptide) of Csac_1076 (celA) was inserted into the BsaI-PstI sites of pHX07.1; Apr, KanrThis study

Ap: ampicillin; Kan: kanamycin.