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The evolution of vertebrate Toll-like receptors.

TitleThe evolution of vertebrate Toll-like receptors.
Publication TypeJournal Article
Year of Publication2005
AuthorsRoach, JC, Glusman, G, Rowen, L, Kaur, A, Purcell, MK, Smith, KD, Hood, LE, Aderem, A
JournalProc Natl Acad Sci U S A
Volume102
Issue27
Pagination9577-82
Date Published2005 Jul 5
ISSN0027-8424
KeywordsAnimals, Base Sequence, Computational Biology, Evolution, Molecular, Gene Components, Genomics, Membrane Glycoproteins, Models, Genetic, Molecular Sequence Data, Multigene Family, Phylogeny, Receptors, Cell Surface, Sequence Analysis, DNA, Species Specificity, Takifugu, Toll-Like Receptor 1, Toll-Like Receptors, Vertebrates
Abstract

The complete sequences of Takifugu Toll-like receptor (TLR) loci and gene predictions from many draft genomes enable comprehensive molecular phylogenetic analysis. Strong selective pressure for recognition of and response to pathogen-associated molecular patterns has maintained a largely unchanging TLR recognition in all vertebrates. There are six major families of vertebrate TLRs. This repertoire is distinct from that of invertebrates. TLRs within a family recognize a general class of pathogen-associated molecular patterns. Most vertebrates have exactly one gene ortholog for each TLR family. The family including TLR1 has more species-specific adaptations than other families. A major family including TLR11 is represented in humans only by a pseudogene. Coincidental evolution plays a minor role in TLR evolution. The sequencing phase of this study produced finished genomic sequences for the 12 Takifugu rubripes TLRs. In addition, we have produced >70 gene models, including sequences from the opossum, chicken, frog, dog, sea urchin, and sea squirt.

DOI10.1073/pnas.0502272102
Alternate JournalProc. Natl. Acad. Sci. U.S.A.
PubMed ID15976025