Cloning and analyses of a BPI/LBP cDNA of the Atlantic cod (Gadus morhua L.).
Using the differential screening technique, a cDNA related to the mammalian family of lipid transfer/lipopolysaccharide-binding proteins was cloned from the Atlantic cod (Gadus morhua L.). The gene is an ortholog of a recently identified gene of rainbow trout (Oncorhynchus mykiss). Phylogenetic analyses suggest that teleost BPI/LBP are modern descendants of the ancestor of mammalian bactericidal/permeability-increasing protein (BPI) and lipopolysaccharide-binding protein (LBP), and a gene of the urochordate Ciona intestinalis is related to this gene family. Molecular modeling suggests that the structure of cod BPI/LBP is similar to mammalian BPI and LBP, while its highly basic character is similar to BPI. Cod BPI/LBP is constitutively expressed in head-kidney (HK) leukocytes. After intraperitoneal injection of bacterin high levels of cod BPI/LBP mRNA were detected also in peripheral blood cells and spleen, while moderate to low levels of transcript were found in heart, liver, gills, skin, brain, and intestine. We conclude that the patterns of charge and expression of cod BPI/LBP are more similar to mammalian BPI than to mammalian LBP.
Stenvik
Jørgen
J
Department of Marine Biotechnology, The Norwegian College of Fishery Science, University of Tromsø, N-9037 Tromsø, Norway. joergens@nfh.uit.no
Solstad
Terese
T
Strand
Cato
C
Leiros
Ingar
I
Jørgensen T
Trond Ø
TØ
D000209:Acute-Phase Proteins / Q000737:chemistry / Q000235:genetics*; D000595:Amino Acid Sequence; D000818:Animals; D023181:Antimicrobial Cationic Peptides; D001483:Base Sequence; D001798:Blood Proteins / Q000737:chemistry / Q000235:genetics*; D002352:Carrier Proteins / Q000737:chemistry / Q000235:genetics*; D003001:Cloning, Molecular; D018076:DNA, Complementary / Q000235:genetics; D005399:Fishes / Q000235:genetics* / Q000378:metabolism; D008562:Membrane Glycoproteins / Q000737:chemistry / Q000235:genetics*; D008565:Membrane Proteins / Q000737:chemistry / Q000235:genetics*; D008958:Models, Molecular; D008969:Molecular Sequence Data; D010802:Phylogeny; D012333:RNA, Messenger / Q000235:genetics / Q000378:metabolism; D020133:Reverse Transcriptase Polymerase Chain Reaction; D017386:Sequence Homology, Amino Acid; D055672:Static Electricity; D000099231:Lipopolysaccharide-Binding Protein
D000209:Acute-Phase Proteins; D023181:Antimicrobial Cationic Peptides; D001798:Blood Proteins; D002352:Carrier Proteins; D018076:DNA, Complementary; D008562:Membrane Glycoproteins; D008565:Membrane Proteins; D012333:RNA, Messenger; D000099231:Lipopolysaccharide-Binding Protein; C021623:bactericidal permeability increasing protein