Expansion and diversification of the signaling capabilities of the CD2/SLAM family in Xenopodinae amphibians.
Immunogenetics
; 63(10): 679-89, 2011 Oct.
Article
em En
| MEDLINE
| ID: mdl-21667045
ABSTRACT
We studied the evolution of the CD2 family in tetrapods by extracting and analyzing CD2-like genes from the genome of the amphibian species Silurana (Xenopus) tropicalis. An exhaustive analysis of the genomic and cDNA databases resulted in the identification of at least 70 CD2-like genes. The predicted receptors mostly maintain the typical VC2 ectodomains, but are highly diverse in their C-termini, which suggests a broad range of signaling capacities. Apart from the presumed monomeric receptors with ITSM and/or ITIM motifs, the Silurana family includes secreted proteins. Furthermore, a fraction of the receptors contain a conserved TM subtype with the NxxR motif that is known to promote an association with the FcRγ subunit and that was previously found in the members of the FcR- and KIR-related receptors. The expression analysis of a sample of the genes showed broad tissue distribution and gene-specific expression patterns. Phylogenetic analysis predicted that the CD58, CD150/SLAM, and SLAMF8 genes were maintained as single-copy genes in both mammals and amphibians, while others expanded/contracted in a lineage-specific manner.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Xenopus
/
Antígenos CD
/
Receptores de Superfície Celular
/
Antígenos CD2
Limite:
Animals
Idioma:
En
Revista:
Immunogenetics
Ano de publicação:
2011
Tipo de documento:
Article
País de afiliação:
Federação Russa