Kinetics of the 5'-nucleotidase and the adenosine deaminase in subcellular fractions of rat brain.

Abstract:

:Suspensions of rat brain microsomes, synaptosomes, and synaptic vesicles were able to convert adenosine to inosine by means of adenosine deaminase. Isosbestic points of this transformation, at 222, 250 and 281 nm, remained unchanged with time-course. This fact suggests that adenosine deaminase (ADA, E.C. 3.5.4.4) is located on the surface of the vesicles whereas purine nucleoside phosphorylase (PNP, E.C. 2.1.2.4) is located inside the vesicles. Kinetic parameters of the particulate 5'-nucleotidase (5'N, E.C. 3.1.3.5) and adenosine deaminase were analogous to those of the cytosolic enzymes. These results suggest that soluble and particulate enzymes represent different pools of the same molecular species.

journal_name

Neurochem Res

journal_title

Neurochemical research

authors

Centelles JJ,Franco R,Canela EI,Bozal J

doi

10.1007/BF00965316

subject

Has Abstract

pub_date

1986-04-01 00:00:00

pages

471-9

issue

4

eissn

0364-3190

issn

1573-6903

journal_volume

11

pub_type

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