TY - JOUR
T1 - Purification, cloning and characterization of egg lectins from the teleost Tribolodon brandti
AU - Jimbo, Mitsuru
AU - Usui, Rika
AU - Sakai, Ryuichi
AU - Muramoto, Koji
AU - Kamiya, Hisao
PY - 2007/6
Y1 - 2007/6
N2 - Three l-rhamnose-binding egg lectins, TBL1, TBL2 and TBL3, were isolated from the eggs of the Far East dace Tribolodon brandti by a combination of affinity chromatography on l-rhamnose-Sepharose 6B gel and reversed-phase HPLC. l-rhamnose is a common inhibitor of the purified lectins and strongly inhibited the hemagglutinating activity of TBL2 and TBL3, but less weakly that of TBL1. l-arabinose, which has the same hydroxyl group orientation at C2 and C4 as l-rhamnose, and d-galactose showed no inhibitory activity against TBL1 but showed weak inhibitory activity against TBL2 and TBL3. The open reading frames of the cDNAs of TBL1, TBL2 and TBL3 encoded for mature proteins of 207, 189, and 293 amino acid residues, respectively. A BLAST homology search showed that the TBLs have about 40% homology to the carbohydrate recognition domains of rhamnose-binding lectins in salmonid eggs. The tandem repeated domains present in TBL1, TBL2 and TBL3 were two, two and three, respectively. TBL2 was exclusively expressed in ovary, while TBL1 and TBL3 were expressed mainly in ovary and weakly in various tissues including gill, heart, kidney, liver, spleen and testis.
AB - Three l-rhamnose-binding egg lectins, TBL1, TBL2 and TBL3, were isolated from the eggs of the Far East dace Tribolodon brandti by a combination of affinity chromatography on l-rhamnose-Sepharose 6B gel and reversed-phase HPLC. l-rhamnose is a common inhibitor of the purified lectins and strongly inhibited the hemagglutinating activity of TBL2 and TBL3, but less weakly that of TBL1. l-arabinose, which has the same hydroxyl group orientation at C2 and C4 as l-rhamnose, and d-galactose showed no inhibitory activity against TBL1 but showed weak inhibitory activity against TBL2 and TBL3. The open reading frames of the cDNAs of TBL1, TBL2 and TBL3 encoded for mature proteins of 207, 189, and 293 amino acid residues, respectively. A BLAST homology search showed that the TBLs have about 40% homology to the carbohydrate recognition domains of rhamnose-binding lectins in salmonid eggs. The tandem repeated domains present in TBL1, TBL2 and TBL3 were two, two and three, respectively. TBL2 was exclusively expressed in ovary, while TBL1 and TBL3 were expressed mainly in ovary and weakly in various tissues including gill, heart, kidney, liver, spleen and testis.
KW - Egg
KW - Fish egg lectin
KW - Ovary
KW - Triborodon brandti
KW - l-rhamnose binding lectin
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U2 - 10.1016/j.cbpb.2007.01.014
DO - 10.1016/j.cbpb.2007.01.014
M3 - Article
C2 - 17331772
AN - SCOPUS:34147128643
VL - 147
SP - 164
EP - 171
JO - Comparative Biochemistry and Physiology - B Biochemistry and Molecular Biology
JF - Comparative Biochemistry and Physiology - B Biochemistry and Molecular Biology
SN - 1096-4959
IS - 2
ER -