Evidence map›Paper›PMID 27215206›Full record

ArticleExtremophiles : life under extreme conditions2016

Purification and characterization of thermostable serine proteases encoded by the genes ttha0099 and ttha01320 from Thermus thermophilus HB8.

Hui Li, Yajie Sun, Xue Jiao, Honglin Wang, Hu Zhu

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Article in Extremophiles : life under extreme conditions, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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4 · The record

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5 · Who and what money

Authors and funding

5 authors.

Hui LiCentre for Bioengineering and Biotechnology, China University of Petroleum (East China), 66 Changjiang West Road, Qingdao, 266580, People's Republic of China.
Yajie SunCentre for Bioengineering and Biotechnology, China University of Petroleum (East China), 66 Changjiang West Road, Qingdao, 266580, People's Republic of China.
Xue JiaoCentre for Bioengineering and Biotechnology, China University of Petroleum (East China), 66 Changjiang West Road, Qingdao, 266580, People's Republic of China.
Honglin WangCentre for Bioengineering and Biotechnology, China University of Petroleum (East China), 66 Changjiang West Road, Qingdao, 266580, People's Republic of China.
Hu ZhuCentre for Bioengineering and Biotechnology, China University of Petroleum (East China), 66 Changjiang West Road, Qingdao, 266580, People's Republic of China. zhuhu@upc.edu.cn.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

As an important class of proteases, serine proteases are required to show high activity under diverse conditions, especially at high temperatures. In the current study, two serine proteases SP348 and SP404 were analyzed by different bioinformatics tools. Both proteins are comprised of a trypsin domain and a PDZ domain, and belong to the trypsin family of proteases. The proteins were successfully expressed with Trx-tags as soluble proteins in the specialized Escherichia coli Rosetta-gami B(DE3)pLysS strain. A simple three-step purification protocol involving heat treatment, Ni-NTA purification and gel filtration was adopted to purify SP404. The molecular weight of recombinant SP404 was about 64 kDa. According to the circular dichroism spectroscopy analysis, SP404 is thermostable at 70 °C with alpha-helix, beta-sheet and random coil contents of about 8, 22 and 70 %, respectively. Our findings may broaden the range of microorganism-derived proteases and have a wide potential for industrial and fundamental studies.

Indexed as

Hot TemperatureBacterial ProteinsCatalytic DomainEnzyme StabilitySerine ProteasesThermus thermophilusBacterial ProteinsSerine ProteasesBioinformatics analysisPurificationSerine proteaseThermostabilityThermus thermophilus

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.