Pteroylpolyglutamate hydrolase of human granulocytes. I. Partial purification and kinetic studies
- 1 January 1979
- journal article
- research article
- Published by Taylor & Francis in Scandinavian Journal of Clinical and Laboratory Investigation
- Vol. 39 (4), 343-349
- https://doi.org/10.3109/00365517909106118
Abstract
Pteroylpolyglutamate hydrolase was demonstrated in the lysosome-like cytoplasmic granules of human granulocytes. Partial purification of this enzyme from granulocytes, obtained from patients with chronic myeloid leukaemia, was achieved by chromatography of the granule extract on Sephadex G-75, Bio-Rex 70 and hydroxylapatite. The enzyme preparation obtained was slightly contaminated with myeloperoxidase. Synthetic pteroyltetraglutamate was used as a substrate for the enzyme. The pH optimum was 5.1; the Km was 6 × 10–3 mol/l; and the enzyme was activated by divalent cations, e.g. Ca++, Mg++ and Mn++. Pteroylpolyglutamate hydrolase is suggested to be involved in the destruction of microorganisms in granulocytes during phagocytosis.Keywords
This publication has 22 references indexed in Scilit:
- Sephadex-gel filtration and heat stability of human jejunal and serum pteroylpolyglutamate hydrolase (folate conjugase): Evidence for two different formsBiochemical Medicine, 1975
- Conformational studies of anthrax polypeptide, subtilis polypeptide, and synthetic poly‐γ‐Lglutamic acidBiopolymers, 1973
- NATURALLY OCCURRING FOLATESAnnals of the New York Academy of Sciences, 1971
- Studies on γ-glutamyl carboxypeptidase I. The solid phase synthesis of analogs of polyglutamates of folic acid and their effects on human liver γ-glutamyl carboxypeptidaseBiochimica et Biophysica Acta (BBA) - Enzymology, 1970
- EFFECTS OF PHENYTOIN ON FOLIC-ACID CONJUGASES IN MANThe Lancet, 1969
- Solid-phase synthesis of polyglutamates of folic acidBiochemistry, 1969
- Methionine synthesis by extracts of Salmonella typhimuriumBiochemical Journal, 1966
- Folic acid, a structural component of T4 bacteriophageJournal of Molecular Biology, 1965
- Two enzymic mechanisms for the methylation of homocysteine by extracts of Escherichia coliBiochemical Journal, 1964
- OBSERVATIONS ON VITAMIN B CONJUGASE FROM HOG KIDNEYPublished by Elsevier ,1946