Plant aspartate transcarbamylase: An affinity chromatographic method for the purification of the enzyme from germinated seedlings

Rao, Jagannatha GS and Savithri, HS and Seethalakshmi, S and Rao, Appaji N (1979) Plant aspartate transcarbamylase: An affinity chromatographic method for the purification of the enzyme from germinated seedlings. In: Analytical Biochemistry, 95 (2). pp. 401-405.

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Abstract

A simple and rapid affinity chromatographic method for the isolation of aspartate transcarbamylase from germinated seedlings of mung bean (Phaseolus aureus) was developed. A partially purified preparation of the enzyme was chromatographed on an affinity column containing aspartate linked to CNBr-activated Sepharose 4B. Aspartate transcarbamylase was specifically eluted from the column with 10 mImage aspartate or 0.5 Image KCl. The enzyme migrated as a single sharp band during disc electrophoresis at pH 8.6 on polyacrylamide gels. Electrophoresis of the sodium dodecyl sulfate-treated enzyme showed two distinct protein bands, suggesting that the mung bean aspartate transcarbamylase was made up of nonidentical subunits. Like the enzyme purified by conventional procedures, this enzyme preparation also exhibited positive homotropic interactions with carbamyl phosphate and negative heterotropic interactions with UMP. This method was extended to the purification of aspartate transcarbamylase from Lathyrus sativus, Eleucine coracona, and Trigonella foenum graecum.

Item Type:	Journal Article
Publication:	Analytical Biochemistry
Publisher:	Elsevier Science
Additional Information:	Copyright of this article belongs to Elsevier Science.
Department/Centre:	Division of Biological Sciences > Biochemistry
Date Deposited:	27 Dec 2010 09:20
Last Modified:	27 Dec 2010 09:20
URI:	http://eprints.iisc.ac.in/id/eprint/34213

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