A rainbow trout lectin with multimeric structure

Liselotte Jensen, Steffen Thiel, Torben E. Petersen, Jens C. Jensenius

Research output: Contribution to journalArticlepeer-review

51 Scopus citations

Abstract

A novel lectin has been identified in rainbow trout serum and plasma. The lectin binds to Sepharose (an agarose polymer) in a calcium-dependent manner. Glucose, N-acetyl-glucosamine, mannose, N-acetylmannosamine, L-fucose, maltose and α-methyl-mannoside are good inhibitors of this binding, whereas glucosamine and D-fucose inhibits to a lesser degree and mannosamine and galactose do not inhibit the binding to Sepharose. When analysed by SDS-PAGE under non-reducing conditions, the lectin appears as a characteristic ladder of bands with approximately 16 kDa between consecutive bands. Upon reduction, the lectin appears as a 16-kDa band. On size-exclusion chromatography of trout serum and plasma, the protein emerges over a broad range corresponding to sizes from about 2000 kDa to less than 200 kDa. The NH2-terminal sequence (AAENRNQXPPG) shows no significant homology with known proteins. Because of the characteristic appearance in non-reducing SDS-PAGE and the lectin activity, we propose to name the protein 'ladderlectin'.

Original languageEnglish
Pages (from-to)385-390
Number of pages6
JournalComparative Biochemistry and Physiology - B Biochemistry and Molecular Biology
Volume116
Issue number4
DOIs
StatePublished - Apr 1997

Keywords

  • Animals
  • Blotting, Western
  • Calcium/metabolism
  • Carbohydrate Metabolism
  • Chromatography, Affinity/methods
  • Chromatography, Liquid/methods
  • Electrophoresis, Polyacrylamide Gel/methods
  • Fish Proteins
  • Lectins/immunology
  • Oncorhynchus mykiss/blood
  • Sequence Homology, Amino Acid
  • Substrate Specificity

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