Signature Sequences in Diverse Proteins Provide Evidence of a Close Evolutionary Relationship Between the Deinococcus-Thermus Group and Cyanobacteria |
| |
Authors: | Radhey S Gupta Vanessa Johari |
| |
Institution: | (1) Department of Biochemistry, McMaster University, Hamilton, Ontario, Canada L8N 3Z5, CA |
| |
Abstract: | A number of proteins have been identified that contain prominent sequence signatures that are uniquely shared by the members
of the Deinococcus-Thermus genera and the cyanobacterial species but which are not found in any of the other eubacterial or archaebacterial homologs.
The proteins containing such sequence signatures include (1) the DnaJ/Hsp40 family of proteins, (2) DNA polymerase I, (3)
the protein synthesis elongation factor EF-Tu, and (4) the elongation factor EF-Ts. A strong affinity of the Deinococcus-Thermus species to cyanobacteria is also seen in the phylogenetic trees based on Hsp70 and DnaJ sequences. These results provide
strong evidence of a close and specific evolutionary relationship between species belonging to these two eubacterial divisions.
Received: 10 September 1997 / Accepted: 15 December 1997 |
| |
Keywords: | : Signature sequence — Cyanobacteria — Deinococcus-Thermus— Prokaryote phylogeny |
本文献已被 SpringerLink 等数据库收录! |