Molecular characterization of PRR13 and its tissue-specific expression in rainbow trout (Oncorhynchus mykiss).
The proline-rich protein 13 (PRR13) is reported to be a key regulator of the resistance to cytostatica by decreasing the copy number of the proapoptotic gene thrombospondin-1. We isolated and characterized the complete PRR13 gene sequence of rainbow trout (Oncorhynchus mykiss). The gene comprises four exons and three introns, the latter of comparatively short lengths (100-811 bp). The full-length PRR13 cDNA consists of 1,101 nucleotides, including an open reading frame of 563 bp, which is predicted to encode a 187 amino acid protein with a molecular mass of 18.8 kDa. A continuous stretch of ten serine residues at the C-terminus is highly conserved and characteristic for vertebrate PRR13, but not for other known proline-rich proteins. Phylogenetic analyses suggest a clear separation of teleostean PRR13 proteins and those from mammalian and reptilian species. Comparison of the tissue-specific PRR13 mRNA abundance in two strains of the rainbow trout coastal form (TCO Steelhead II-WA vs. BORN Steelhead II-Germany) revealed an increased expression in the BORN trout in nearly all examined tissues. The major expression differences were detected in gill (2.29-fold) and in liver tissue (2.16-fold). Hence, the increased PRR13 expression in BORN trout might cause improved protection from natural cytostatica and therefore support our assumption that PRR13 is a candidate gene possibly involved in the varying ability of the two rainbow trout strains to handle environmental stress under local conditions of the Southern Baltic.
Fachbereich Molekularbiologie, Leibniz-Institut für Nutztierbiologie (FBN), Wilhelm-Stahl-Allee 2, 18196, Dummerstorf, Germany.
Marieke
M
Verleih
Alexander
A
Rebl
Bernd
B
Köllner
Tomáš
T
Korytář
Günter
G
Kotterba
Eckhard
E
Anders
Klaus
K
Wimmers
Tom
T
Goldammer
D000818:Animals; D019295:Computational Biology; D017931:DNA Primers / Q000235:genetics; D018076:DNA, Complementary / Q000235:genetics; D040461:Gene Components; D020869:Gene Expression Profiling; D005786:Gene Expression Regulation / Q000235:genetics*; D005858:Germany; D017686:Oncorhynchus mykiss / Q000235:genetics* / Q000378:metabolism; D016366:Open Reading Frames / Q000235:genetics; D010802:Phylogeny; D055232:Proline-Rich Protein Domains / Q000235:genetics*; D012097:Repressor Proteins / Q000235:genetics* / Q000378:metabolism; D020133:Reverse Transcriptase Polymerase Chain Reaction; D019700:Thrombospondin 1 / Q000378:metabolism
D017931:DNA Primers; D018076:DNA, Complementary; D012097:Repressor Proteins; D019700:Thrombospondin 1