Journal article
Lactoferrin: similarity to diamine oxidase and purification by aminohexyl affinity chromatography
A protein reacting with a monoclonal antibody against human placental diamine oxidase was purified from the specific granules of human neutrofil granulocytes using affinity chromatography on aminohexyl-divinylsulfonyl-agarose. The protein had an M(r) determined by SDS/PAGE, corresponding to diamine oxidase, but had other properties which indicated that it might be a different protein.
A combination of protein chemical techniques, including N-terminal sequencing, identified the protein as lactoferrin, an iron-containing protein with an M(r) of approximately 800000, a high isoelectric point and ferroxidase activity. Purified commercial lactoferrin was shown to bind to aminohexyl-divinylsulfonyl-agarose, and to be eluted in a heterogenous way from the matrix by amines and salt.
Alignment of the sequences of diamine oxidase and lactoferrin showed that they are similar, indicating a common ancestry for these two different classes of metallo-oxidases.
Language: | English |
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Year: | 1996 |
Pages: | 303-308 |
ISSN: | 14321033 and 00142956 |
Types: | Journal article |
DOI: | 10.1111/j.1432-1033.1996.0303t.x |
Amine Oxidase (Copper-Containing) Amines Amino Acid Sequence Antibodies, Monoclonal Blotting, Western Chromatography, Affinity Chromatography, Ion Exchange Diamines Electrophoresis, Agar Gel Electrophoresis, Polyacrylamide Gel Enzyme-Linked Immunosorbent Assay Humans Lactoferrin Molecular Sequence Data Neutrophils Placenta Sepharose Sequence Alignment Sequence Analysis aminohexyl-sepharose octamethylenediamine octylamine