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| Content Provider | Springer Nature Link |
|---|---|
| Author | Guo, Xu Jiang, Chengying Luo, Yuanming Zhang, Mingjiang Poetsch, Ansgar Liu, Shuangjiang |
| Copyright Year | 2013 |
| Abstract | Acidithiobacillus caldus plays an important role in commercial bioleaching. To understand how NaCl stress adaptation occurs in A. caldus, we grew A. caldus strain SM-1 in media containing high NaCl concentrations. SM-1 grew at concentrations of up to 1.0-mol L$^{−1}$ NaCl, but growth was severely inhibited at higher concentrations. Proteomic analysis showed that SM-1 used multiple strategies to respond to NaCl stress. In addition to several heat-shock proteins, enzymes involved in proline biosynthesis increased under NaCl stress. In addition, two DNA-binding proteins and a third protein of unknown function (Atc_1291), which was subsequently identified as a putative single-stranded DNA-binding protein, were up-regulated in the presence of NaCl stress. These DNA-binding proteins might play a role in response to osmotic stress. Atc_1291 was cloned and expressed in Escherichia coli. Surprisingly, we found that E. coli BL21/pET28a-atc_1291 grew to higher cell densities than E. coli BL21/pET28a, regardless of NaCl stress. Homologs to Atc_1291 were identified in several groups of Proteobacteria. The role of Atc_1291 in enhancing cell growth needs further investigation. |
| Starting Page | 301 |
| Ending Page | 309 |
| Page Count | 9 |
| File Format | |
| ISSN | 10016538 |
| Journal | Chinese Science Bulletin |
| Volume Number | 59 |
| Issue Number | 3 |
| e-ISSN | 18619541 |
| Language | English |
| Publisher | Springer Berlin Heidelberg |
| Publisher Date | 2013-12-26 |
| Publisher Place | Berlin, Heidelberg |
| Access Restriction | Subscribed |
| Subject Keyword | Acidithiobacillus caldus SM-1 NaCl stress Proline Single-stranded DNA-binding proteins Bioleaching Science Life Sciences Physics Chemistry/Food Science Earth Sciences Engineering |
| Content Type | Text |
| Resource Type | Article |
| Subject | Multidisciplinary |
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