PMID- 26286503 OWN - NLM STAT- MEDLINE DCOM- 20161020 LR - 20181113 IS - 1432-0983 (Electronic) IS - 0172-8083 (Linking) VI - 62 IP - 1 DP - 2016 Feb TI - Evolution and tinkering: what do a protein kinase, a transcriptional regulator and chromosome segregation/cell division proteins have in common? PG - 67-70 LID - 10.1007/s00294-015-0513-y [doi] AB - In this study, we focus on functional interactions among multi-domain proteins which share a common evolutionary origin. The examples we develop are four Bacillus subtilis proteins, which all possess an ATP-binding Walker motif: the bacterial tyrosine kinase (BY-kinase) PtkA, the chromosome segregation protein Soj (ParA), the cell division protein MinD and a transcription regulator SalA. These proteins have arisen via duplication of the ancestral ATP-binding domain, which has undergone fusions with other functional domains in the process of divergent evolution. We point out that these four proteins, despite having very different physiological roles, engage in an unusually high number of binary functional interactions. Namely, MinD attracts Soj and PtkA to the cell pole, and in addition, activates the kinase function of PtkA. SalA also activates the kinase function of PtkA, and it gets phosphorylated by PtkA as well. The consequence of this phosphorylation is the activation of SalA as a transcriptional repressor. We hypothesize that these functional interactions remain preserved during divergent evolution and represent a constraint on the process of evolutionary "tinkering", brought about by fusions of different functional domains. FAU - Derouiche, Abderahmane AU - Derouiche A AD - Systems and Synthetic Biology, Department of Biology and Biological Engineering, Chalmers University of Technology, Goteborg, Sweden. FAU - Shi, Lei AU - Shi L AD - Systems and Synthetic Biology, Department of Biology and Biological Engineering, Chalmers University of Technology, Goteborg, Sweden. FAU - Kalantari, Aida AU - Kalantari A AD - Systems and Synthetic Biology, Department of Biology and Biological Engineering, Chalmers University of Technology, Goteborg, Sweden. FAU - Mijakovic, Ivan AU - Mijakovic I AD - Systems and Synthetic Biology, Department of Biology and Biological Engineering, Chalmers University of Technology, Goteborg, Sweden. ivan.mijakovic@chalmers.se. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PT - Review DEP - 20150819 PL - United States TA - Curr Genet JT - Current genetics JID - 8004904 RN - 0 (Bacterial Proteins) RN - 8L70Q75FXE (Adenosine Triphosphate) RN - EC 2.7.- (Protein Kinases) SB - IM MH - Adenosine Triphosphate/metabolism MH - Bacillus subtilis/genetics/metabolism MH - Bacterial Proteins/genetics/metabolism MH - *Biological Evolution MH - *Cell Division MH - *Chromosome Segregation MH - *Gene Expression Regulation MH - Protein Binding MH - Protein Interaction Domains and Motifs MH - Protein Kinases/chemistry/*metabolism MH - *Transcription, Genetic OTO - NOTNLM OT - ATPase OT - Cell division OT - DNA-binding domain OT - Divergent evolution OT - Protein phosphorylation OT - Transcriptional regulation EDAT- 2015/08/20 06:00 MHDA- 2016/10/21 06:00 CRDT- 2015/08/20 06:00 PHST- 2015/08/06 00:00 [received] PHST- 2015/08/10 00:00 [accepted] PHST- 2015/08/08 00:00 [revised] PHST- 2015/08/20 06:00 [entrez] PHST- 2015/08/20 06:00 [pubmed] PHST- 2016/10/21 06:00 [medline] AID - 10.1007/s00294-015-0513-y [pii] AID - 10.1007/s00294-015-0513-y [doi] PST - ppublish SO - Curr Genet. 2016 Feb;62(1):67-70. doi: 10.1007/s00294-015-0513-y. Epub 2015 Aug 19.