Evaluation of silica gel-immobilized phosphorylcholine columns for size exclusion chromatography and their application in the analysis of the subunit structures of fish-egg lectins.
Columns of phosphorylcholine (PC) immobilized on silica gel were shown to be useful for size exclusion chromatography (SEC) of proteins. The columns provided good separation of proteins in 50mM sodium phosphate buffer (pH 6.9) containing 0.25 M NaCl, and there was a linear relationship between the retention times and the logarithmic values of the molecular weights with a correlation coefficient (R(2)) of 0.978-0.992. The columns were used in analyzing the subunit structures of the rhamnose-binding lectins CSL1, CSL2, and CSL3, isolated from chum salmon (Oncorhynchus keta) eggs. Although the lectins, which are a group of carbohydrate-binding and hydrophobic proteins, behaved anomalously in SEC with conventional matrices, they could be eluted from the immobilized PC columns without non-size-related retention, thereby allowing their molecular weights to be reliably estimated.
Department of Biomolecular Science, Graduate School of Life Sciences, Tohoku University, Aoba-ku, Tsutsumidori, Sendai 981-8555, Japan.
Y
Y
Watanabe
M
M
Abolhassani
Y
Y
Tojo
Y
Y
Suda
K
K
Miyazawa
Y
Y
Igarashi
K
K
Sakuma
T
T
Ogawa
K
K
Muramoto
D000818:Animals; D002850:Chromatography, Gel / Q000295:instrumentation / Q000379:methods*; D005399:Fishes; D006863:Hydrogen-Ion Concentration; D037102:Lectins / Q000032:analysis / Q000737:chemistry*; D008970:Molecular Weight; D010063:Ovum / Q000737:chemistry*; D010767:Phosphorylcholine / Q000737:chemistry*; D021122:Protein Subunits / Q000032:analysis* / Q000737:chemistry; D058428:Silica Gel; D012822:Silicon Dioxide / Q000737:chemistry*; D013997:Time Factors
D037102:Lectins; D021122:Protein Subunits; D010767:Phosphorylcholine; D058428:Silica Gel; D012822:Silicon Dioxide