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ISSN 2410-7751 (Print)
ISSN 2410-776X (Online)

"Biotechnologia Acta" v. 7, no 4, 2014
https://doi.org/10.15407/biotech7.04.035
Р. 35-42, Bibliography 27, English.
Universal decimal classification: 577.112.5: 57.088

ISOLATION AND PURIFICATION OF A KRINGLE 5 FROM HUMAN PLASMINOGEN USING AH-SEPHAROSE

Kapustianenko L. G., Iatsenko T. A., Iusova O. I., Grinenko T. V.

Palladin Institute of Biochemistry of the National Academy of Sciences of Ukraine, Kyiv, Ukraine

Our aim was to develop a method for isolation of human plasminogen kringle 5 possessing functional activity. The proposed method includes the following steps: hydrolysis of plasminogen with elastase, separation of mini-plasminogen from kringle fragments 1–3 and 4 on Lys-Sepharose, mini-plasminogen hydrolysis with pepsin, affinity chromatography on AH-Sepharose and polyacrilamide gel electrophoresis.

We obtained the electrophoretically pure fragment of human plasminogen kringle 5 showing functional activity towards the ligands with high and low molecular mass. Weight yield was 3.8% that corresponds to 25.3% of the theoretically possible.

It was established that affinity chromatography on AH-Sepharose was the sufficient step to isolate kringle 5 from mini-plasminogen hydrolysate with pepsin. This approach does not require additional purification steps while the ability of kringle 5 to bind specifically to AH-Sepharose demonstrates the functional activity of the kringle.

Key words: plasminogen, fragments of plasminogen, kringle 5, angiostatins.

© Palladin Institute of Biochemistry of the National Academy of Sciences of Ukraine, 2014