title: CspE is Overproduced by Temperature Downshift in the Acinetobacter johnsonii DBP-3.
abstract: The denitrifying bacterium Acinetobacter johnsonii strain DBP-3 which was capable of removing phosphate, nitrate, and ammoniacal salt is psychrotolerant, whereas, the cold shock response mechanisms or the cold shock proteins (Csps) was unclear. In this article, the optimal growth temperature (25 °C) and cold shock temperature (7.5 °C) were determined firstly by an Arrhenius plot of the growth of the strain DBP-3. Then, among the seven cold shock-like protein genes which were cloned and identified referenced by A. johnsonii SH046 genome, qRT-PCR and shotgun-LTQ mass spectrometry showed that Csp3 and Csp4 were overexpressed under cold shock condition. Furthermore, Western blotting confirmed the result with the antibodies against Csp3 and Csp4 prepared by ourselves. Finally, the phylogenetic analysis showed that the similarity percent between Csp3 and Csp4 was 76.85 %, and Csp3 and Csp4 belonged to CspE family. The results indicated that CspE is overproduced by temperature downshift and may play an important role in the psychrotolerant process of strain DBP-3.
authors.affiliation: College of Animal Sciences, Jilin University, 5333 Xi'an Road, Changchun, 130062, China.
authors.forename: Dan
authors.initials: D
authors.lastname: Su
authors.affiliation: College of Animal Sciences, Jilin University, 5333 Xi'an Road, Changchun, 130062, China.
authors.forename: Linlin
authors.initials: L
authors.lastname: Hao
authors.affiliation: College of Animal Sciences, Jilin University, 5333 Xi'an Road, Changchun, 130062, China.
authors.forename: Fuwang
authors.initials: F
authors.lastname: Chen
authors.affiliation: College of Animal Sciences, Jilin University, 5333 Xi'an Road, Changchun, 130062, China.
authors.forename: Siming
authors.initials: S
authors.lastname: Li
authors.affiliation: College of Resource and Environmental Science, Jilin Agricultural University, 2888 Xincheng Street, Changchun, 130118, China.
authors.forename: Ahmed Mohamed
authors.initials: AM
authors.lastname: Abdelrahman
authors.affiliation: College of Animal Sciences, Jilin University, 5333 Xi'an Road, Changchun, 130062, China.
authors.forename: Yu
authors.initials: Y
authors.lastname: Zhang
authors.affiliation: College of Animal Sciences, Jilin University, 5333 Xi'an Road, Changchun, 130062, China.
authors.forename: Hao
authors.initials: H
authors.lastname: Yu
authors.affiliation: College of Animal Sciences, Jilin University, 5333 Xi'an Road, Changchun, 130062, China. happy626288@sohu.com.
authors.forename: Songcai
authors.initials: S
authors.lastname: Liu
authors.affiliation: College of Resource and Environmental Science, Jilin Agricultural University, 2888 Xincheng Street, Changchun, 130118, China. limtdoc2008@163.com.
authors.forename: Mingtang
authors.initials: M
authors.lastname: Li
mesh_terms: D000150:Acinetobacter / Q000145:classification / Q000235:genetics* / Q000378:metabolism; D001426:Bacterial Proteins / Q000235:genetics / Q000378:metabolism*; D057773:Cold Shock Proteins and Peptides / Q000235:genetics / Q000378:metabolism*; D003080:Cold Temperature; D015964:Gene Expression Regulation, Bacterial; D010802:Phylogeny
chemical_list: D001426:Bacterial Proteins; D057773:Cold Shock Proteins and Peptides