AP4A-hydrolysing activity in sea urchin embryos.

Abstract:

:The enzyme activity hydrolysing diadenosine 5,5'-P1, P4-tetraphosphate (AP4A) was demonstrated in the embryonic extract of sea urchin. The enzyme activity was preferentially inhibited by ZnCl2 and by high concentrations of isobutylmethylxanthine, indicating that two types of the enzyme, (AP4A) hydrolase and non-specific phosphodiesterase, are related to the degradation of (AP4A) in sea urchin embryos. The (AP4A)-hydrolysing activity was not detectable in the unfertilized eggs because of the presence of a high-molecular weight (HMW) and thermolabile inhibitory factor. Though the enzymes were activated immediately after fertilization, no cell cycle-dependent fluctuations in their activities were observed.

journal_name

Exp Cell Res

authors

Morioka M,Shimada H

doi

10.1016/0014-4827(87)90224-2

subject

Has Abstract

pub_date

1987-03-01 00:00:00

pages

57-62

issue

1

eissn

0014-4827

issn

1090-2422

pii

0014-4827(87)90224-2

journal_volume

169

pub_type

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