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Paralogous genes encoding transport proteins in microbial genomes
1Department of Biology, University of California at San Diego, La Jolla 92093-0116, USA. msaier@ucsd.edu
Research in Microbiology
|February 15, 2000
Summary
Prokaryotic transport systems are diverse, with many encoded by small gene families or orphan genes. This study identified 76 permease families across 18 genomes, revealing insights into their evolution and function.
Area of Science:
- Microbiology
- Genomics
- Biochemistry
Background:
- Prokaryotic genomes contain numerous transport proteins, crucial for cellular functions.
- Many transporters belong to large superfamilies, but a significant portion are encoded by orphan or small gene families.
Purpose of the Study:
- To identify and analyze paralogous transport systems in prokaryotes.
- To investigate the prevalence and characteristics of permease families.
- To interpret findings in the context of large permease superfamilies.
Main Methods:
- Analysis of 18 completely sequenced prokaryotic genomes.
- Identification of paralogous transport systems.
- Classification into permease families.
Main Results:
- Identification of 76 distinct permease families.
- Analysis of paralogues within selected families.
- Highlighting prominent results relevant to the largest permease superfamilies.
Conclusions:
- Prokaryotic transport systems exhibit significant diversity in family size and origin.
- Understanding paralogous relationships provides insights into transporter evolution.
- Further investigation into smaller and orphan transporter families is warranted.