Volume 23, Issue 1 pp. 45-51
Article

Developmental profile of NTPDase activity in synaptic plasma membranes isolated from rat cerebral cortex

N. Nedeljkovic

Corresponding Author

N. Nedeljkovic

Department of General Physiology and Biophysics, Faculty of Biology, University of Belgrade, Studentski trg 3, 11001 Belgrade, Yugoslavia

*Corresponding author. Tel.: +381 11 3032 356; fax: +381 11 3032 356.

E-mail address:[email protected] (N. Nedeljkovic)

Search for more papers by this author
A. Banjac

A. Banjac

Laboratory of Molecular Biology and Endocrinology, Vinca Institute of Nuclear Sciences, Belgrade, Yugoslavia

Search for more papers by this author
A. Horvat

A. Horvat

Laboratory of Molecular Biology and Endocrinology, Vinca Institute of Nuclear Sciences, Belgrade, Yugoslavia

Search for more papers by this author
M. Stojiljkovic

M. Stojiljkovic

Department of General Physiology and Biophysics, Faculty of Biology, University of Belgrade, Studentski trg 3, 11001 Belgrade, Yugoslavia

Search for more papers by this author
G. Nikezic

G. Nikezic

Laboratory of Molecular Biology and Endocrinology, Vinca Institute of Nuclear Sciences, Belgrade, Yugoslavia

Search for more papers by this author
First published: 20 October 2004
Citations: 24

Abstract

In the present study the developmental profile of ATP-hydrolyzing activity promoted by NTPDase 1, its kinetic properties and the enzyme protein abundance associated with synaptic plasma membrane from rat cerebral cortex were characterized. NTPDase 1 activity increased from birth to day 30; afterwards it decreased and remained unchanged from adulthood (90 days) to senescence (365 days). Kinetic analysis revealed that enzyme exhibited the highest specific activity at day 30 and highest apparent affinity for ATP at day 365; however, Vmax/Km values remained unchanged for each age studied. Immunoblot analysis demonstrated that relative abundance of NTPDase 1 is highest at day 15 during ontogeny. The discrepancy between maximum enzyme activity and maximum enzyme protein abundance indicates that NTPDase 1 may have an additional role during development.

The full text of this article hosted at iucr.org is unavailable due to technical difficulties.