title: A Hypothetical Protein of Alteromonas macleodii AltDE1 (amad1_06475) Predicted to be a Cold-Shock Protein with RNA Chaperone Activity.
abstract: Alteromonas macleodii AltDE1 is a deep sea protobacteria that is distinct from the surface isolates of the same species. This study was designed to elucidate the biological function of amad1_06475, a hypothetical protein of A. macleodii AltDE1. The 70 residues protein sequence showed considerable homology with cold-shock proteins (CSPs) and RNA chaperones from different organisms. Multiple sequence alignment further supported the presence of conserved csp domain on the protein sequence. The three-dimensional structure of the protein was also determined, and verified by PROCHECK, Verify3D, and QMEAN programs. The predicted structure contained five anti-parallel β-strands and RNA-binding motifs, which are characteristic features of prokaryotic CSPs. Finally, the binding of a thymidine-rich oligonucleotide and a single uracil molecule in the active site of the protein further strengthens our prediction about the function of amad1_06475 as a CSP and thereby acting as a RNA chaperone. The binding was performed by molecular docking tools and was compared with similar binding of 3PF5 (PDB) and 2HAX (PDB), major CSPs of Bacillus subtilis and Bacillus caldolyticus, respectively.
authors.affiliation: Department of Biotechnology and Genetic Engineering, Faculty of Life Science, Mawlana Bhashani Science and Technology University, Tangail, Bangladesh.
authors.forename: Arafat Rahman
authors.initials: AR
authors.lastname: Oany
authors.affiliation: Department of Biotechnology and Genetic Engineering, Faculty of Life Science, Mawlana Bhashani Science and Technology University, Tangail, Bangladesh.
authors.forename: Shah Adil Ishtiyaq
authors.initials: SA
authors.lastname: Ahmad
authors.affiliation: Department of Biotechnology and Genetic Engineering, Faculty of Life Science, Mawlana Bhashani Science and Technology University, Tangail, Bangladesh.
authors.forename: Km Kaderi
authors.initials: KK
authors.lastname: Kibria
authors.affiliation: Department of Biotechnology and Genetic Engineering, Faculty of Life Science, Mawlana Bhashani Science and Technology University, Tangail, Bangladesh.
authors.forename: Mohammad Uzzal
authors.initials: MU
authors.lastname: Hossain
authors.affiliation: Biotechnology and Genetic Engineering Discipline, Life Science School, Khulna University, Khulna, Bangladesh.
authors.forename: Tahmina Pervin
authors.initials: TP
authors.lastname: Jyoti
keywords: Cold-shock protein (CSP); RNA chaperone; RNP; cold-shock domain