ZFIN ID: ZDB-PUB-110803-12
Origin and Evolution of TRIM Proteins: New Insights from the Complete TRIM Repertoire of Zebrafish and Pufferfish
Boudinot, P., van der Aa, L.M., Jouneau, L., Du Pasquier, L., Pontarotti, P., Briolat, V., Benmansour, A., and Levraud, J.P.
Date: 2011
Source: PLoS One   6(7): e22022 (Journal)
Registered Authors: Briolat, Valerie, Levraud, Jean-Pierre
Keywords: Zebrafish, Major histocompatibility complex, Mammalian genomics, Sequence alignment, Protein domains, Evolutionary genetics, Genomic databases, Genome evolution
MeSH Terms:
  • Amino Acid Sequence
  • Animals
  • Conserved Sequence/genetics
  • Evolution, Molecular*
  • Fish Proteins/chemistry
  • Fish Proteins/genetics*
  • Fish Proteins/metabolism
  • Gene Duplication
  • Gene Expression Profiling
  • Gene Expression Regulation
  • Genome/genetics
  • Humans
  • Major Histocompatibility Complex/genetics
  • Molecular Sequence Data
  • Multigene Family/genetics
  • Phylogeny
  • Protein Structure, Tertiary
  • Selection, Genetic
  • Sequence Homology, Amino Acid
  • Synteny/genetics
  • Tetraodontiformes/genetics*
  • Zebrafish/genetics*
PubMed: 21789205 Full text @ PLoS One
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ABSTRACT
Tripartite motif proteins (TRIM) constitute a large family of proteins containing a RING-Bbox-Coiled Coil motif followed by different C-terminal domains. Involved in ubiquitination, TRIM proteins participate in many cellular processes including antiviral immunity. The TRIM family is ancient and has been greatly diversified in vertebrates and especially in fish. We analyzed the complete sets of trim genes of the large zebrafish genome and of the compact pufferfish genome. Both contain three large multigene subsets - adding the hsl5/trim35-like genes (hltr) to the ftr and the btr that we previously described - all containing a B30.2 domain that evolved under positive selection. These subsets are conserved among teleosts. By contrast, most human trim genes of the other classes have only one or two orthologues in fish. Loss or gain of C-terminal exons generated proteins with different domain organizations; either by the deletion of the ancestral domain or, remarkably, by the acquisition of a new C-terminal domain. Our survey of fish trim genes in fish identifies subsets with different evolutionary dynamics. trims encoding RBCC-B30.2 proteins show the same evolutionary trends in fish and tetrapods: they evolve fast, often under positive selection, and they duplicate to create multigenic families. We could identify new combinations of domains, which epitomize how new trim classes appear by domain insertion or exon shuffling. Notably, we found that a cyclophilin-A domain replaces the B30.2 domain of a zebrafish fintrim gene, as reported in the macaque and owl monkey antiretroviral TRIM5α. Finally, trim genes encoding RBCC-B30.2 proteins are preferentially located in the vicinity of MHC or MHC gene paralogues, which suggests that such trim genes may have been part of the ancestral MHC.
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