Nucleic Acids Research, 2000, Vol. 28, No. 2 383-392
© 2000 Oxford University Press
SURVEY AND SUMMARY: ADEPTs: information necessary for subcellular distribution of eukaryotic sorting isozymes resides in domains missing from eubacterial and archaeal counterparts
Department of Biochemistry and Molecular Biology, Pennsylvania State University College of Medicine, H171, 500 University Drive, Hershey, PA 17033, USA and 1Department of Biochemistry, University of Louisville School of Medicine, 312 Abraham Flexner Way, Louisville, KY 40292, USA
Sorting isozymes are encoded by single genes, but the encoded proteins are distributed to multiple subcellular compartments. We surveyed the predicted protein sequences of several nucleic acid interacting sorting isozymes from the eukaryotic taxonomic domain and compared them with their homologs in the archaeal and eubacterial domains. Here, we summarize the data showing that the eukaryotic sorting isozymes often possess sequences not present in the archaeal and eubacterial counterparts and that the additional sequences can act to target the eukaryotic proteins to their appropriate subcellular locations. Therefore, we have named these protein domains ADEPTs (Additional Domains for Eukaryotic Protein Targeting). Identification of additional domains by phylogenetic comparisons should be generally useful for locating candidate sequences important for subcellular distribution of eukaryotic proteins.
* To whom correspondence should be addressed. Tel: +1 717 531 6008; Fax: +1 717 531 7072; Email: ahopper@psu.edu
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