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A Tetrahymena thermophila G4-DNA Binding Protein with Dihydrolipoamide Dehydrogenase Activity
Biochemistry
  • Kehkooi Kee, Iowa State University
  • Luming Niu, Immusol, Inc.
  • Eric Henderson, Iowa State University
Document Type
Article
Publication Version
Published Version
Publication Date
1-1-1998
DOI
10.1021/bi9716377
Abstract
G4-DNA is a four-stranded structure that is formed by guanine-rich sequences. We report here the purification and characterization of a novel G4-DNA binding protein from Tetrahymena thermophila, designated TGP2. TGP2 was found to preferentially bind to G4-DNA oligonucleotides with adjacent single-stranded domains containing phosphorylated 5‘ ends and the sequence element, 5‘-ACTG-3‘. The amino acid sequence of TGP2 has high similarity to dihydrolipoamide dehydrogenase (DLDH) from a variety of species, and TGP2 was shown to have DLDH activity. Purified DLDH from porcine heart and bovine intestinal mucosa were shown to bind specifically to G4-DNA oligonucleotides. On the basis of these results we conclude that TGP2 is DLDH in T. thermophila and suggest that the G4-DNA binding capability of TGP2/DLDH may be biologically relevant.
Comments

Reprinted (adapted) with permission from A Tetrahymena thermophila G4-DNA Binding Protein with Dihydrolipoamide Dehydrogenase Activity. Kehkooi Kee, Luming Niu, and Eric Henderson. Biochemistry 1998 37 (12), 4224-4234. DOI: 10.1021/bi9716377. Copyright 1998 American Chemical Society.

Copyright Owner
American Chemical Society
Language
en
File Format
application/pdf
Citation Information
Kehkooi Kee, Luming Niu and Eric Henderson. "A Tetrahymena thermophila G4-DNA Binding Protein with Dihydrolipoamide Dehydrogenase Activity" Biochemistry Vol. 37 Iss. 12 (1998) p. 4224 - 4234
Available at: http://works.bepress.com/eric-henderson/21/