Phylogenetic classification of diverse LysR-type transcriptional regulators of a model prokaryote Geobacter sulfurreducens

J Mol Evol. 2012 Apr;74(3-4):187-205. doi: 10.1007/s00239-012-9498-z. Epub 2012 Apr 20.


The protein family of LysR-type transcriptional regulators (LTTRs) is highly abundant among prokaryotes. We analyzed 10,145 non-redundant microbial sequences with homology to eight LysR family regulators of a model prokaryote, Geobacter sulfurreducens, and employed phylogenetic tree inference for LTTR classification. We also analyzed the arrangement of genome clusters containing G. sulfurreducens LTTR genes and searched for LTTR regulatory motifs, suggesting likely regulatory targets of G. sulfurreducens LTTRs. This is the first study to date providing a detailed classification of LTTRs in the deltaproteobacterial family Geobacteraceae.

Publication types

  • Research Support, U.S. Gov't, P.H.S.

MeSH terms

  • Bacterial Proteins / genetics*
  • Base Sequence
  • Geobacter / genetics*
  • Molecular Sequence Data
  • Multigene Family
  • Nucleotide Motifs / genetics
  • Phylogeny
  • Sequence Analysis, DNA
  • Transcription Factors / genetics*


  • Bacterial Proteins
  • Transcription Factors
  • LysR protein, Bacteria