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The effect of N-terminal acetylation and the inhibition activity of acetylated enkephalins on the aminopeptidase M-catalyzed hydrolysis of enkephalins☆()

High performance liquid chromatography and high performance liquid chromatography/electrospray ionization-mass spectrometry were used to study the effect of N-terminal acetylation and the inhibition activity of acetylated enkephalins on the aminopeptidase M (EC 3.4.11.2)-catalyzed hydrolysis of meth...

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Autores principales: Jayawardene, Dhammika S, Dass, Chhabil
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Elsevier Science Inc. 1999
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7124199/
https://www.ncbi.nlm.nih.gov/pubmed/10503775
http://dx.doi.org/10.1016/S0196-9781(99)00089-3
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author Jayawardene, Dhammika S
Dass, Chhabil
author_facet Jayawardene, Dhammika S
Dass, Chhabil
author_sort Jayawardene, Dhammika S
collection PubMed
description High performance liquid chromatography and high performance liquid chromatography/electrospray ionization-mass spectrometry were used to study the effect of N-terminal acetylation and the inhibition activity of acetylated enkephalins on the aminopeptidase M (EC 3.4.11.2)-catalyzed hydrolysis of methionine (Met-enk) and leucine enkephalins (Leu-enk). Acetylation imparts a significant enhancement in the proteolytic stability of these two peptides. After 30 min of the reaction, <10% of both acetylated enkephalins was hydrolyzed. In an 8-h incubation period, only a maximum of 54% acetylated (Ac)-Met-enk and 38% Ac-Leu-enk was hydrolyzed. V(max) and K(m [infi]) for the degradation of Ac-Met-enk were 1.4 nmol/min/50 ng and 2.2 mM, respectively. The corresponding values for the reaction of Ac-Leu-enk were 0.5 nmol/min/50 ng and 0.9 mM. Also, the aminopeptidase M activity on Met-enk can be inhibited in the presence of Ac-Met-enk, which acts as a mixed-type inhibitor with the inhibition constant (K(i)) of 1 × 10(−3) M.
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spelling pubmed-71241992020-04-08 The effect of N-terminal acetylation and the inhibition activity of acetylated enkephalins on the aminopeptidase M-catalyzed hydrolysis of enkephalins☆() Jayawardene, Dhammika S Dass, Chhabil Peptides Article High performance liquid chromatography and high performance liquid chromatography/electrospray ionization-mass spectrometry were used to study the effect of N-terminal acetylation and the inhibition activity of acetylated enkephalins on the aminopeptidase M (EC 3.4.11.2)-catalyzed hydrolysis of methionine (Met-enk) and leucine enkephalins (Leu-enk). Acetylation imparts a significant enhancement in the proteolytic stability of these two peptides. After 30 min of the reaction, <10% of both acetylated enkephalins was hydrolyzed. In an 8-h incubation period, only a maximum of 54% acetylated (Ac)-Met-enk and 38% Ac-Leu-enk was hydrolyzed. V(max) and K(m [infi]) for the degradation of Ac-Met-enk were 1.4 nmol/min/50 ng and 2.2 mM, respectively. The corresponding values for the reaction of Ac-Leu-enk were 0.5 nmol/min/50 ng and 0.9 mM. Also, the aminopeptidase M activity on Met-enk can be inhibited in the presence of Ac-Met-enk, which acts as a mixed-type inhibitor with the inhibition constant (K(i)) of 1 × 10(−3) M. Elsevier Science Inc. 1999 2000-02-09 /pmc/articles/PMC7124199/ /pubmed/10503775 http://dx.doi.org/10.1016/S0196-9781(99)00089-3 Text en Copyright © 1999 Elsevier Science Inc. All rights reserved. Since January 2020 Elsevier has created a COVID-19 resource centre with free information in English and Mandarin on the novel coronavirus COVID-19. The COVID-19 resource centre is hosted on Elsevier Connect, the company's public news and information website. Elsevier hereby grants permission to make all its COVID-19-related research that is available on the COVID-19 resource centre - including this research content - immediately available in PubMed Central and other publicly funded repositories, such as the WHO COVID database with rights for unrestricted research re-use and analyses in any form or by any means with acknowledgement of the original source. These permissions are granted for free by Elsevier for as long as the COVID-19 resource centre remains active.
spellingShingle Article
Jayawardene, Dhammika S
Dass, Chhabil
The effect of N-terminal acetylation and the inhibition activity of acetylated enkephalins on the aminopeptidase M-catalyzed hydrolysis of enkephalins☆()
title The effect of N-terminal acetylation and the inhibition activity of acetylated enkephalins on the aminopeptidase M-catalyzed hydrolysis of enkephalins☆()
title_full The effect of N-terminal acetylation and the inhibition activity of acetylated enkephalins on the aminopeptidase M-catalyzed hydrolysis of enkephalins☆()
title_fullStr The effect of N-terminal acetylation and the inhibition activity of acetylated enkephalins on the aminopeptidase M-catalyzed hydrolysis of enkephalins☆()
title_full_unstemmed The effect of N-terminal acetylation and the inhibition activity of acetylated enkephalins on the aminopeptidase M-catalyzed hydrolysis of enkephalins☆()
title_short The effect of N-terminal acetylation and the inhibition activity of acetylated enkephalins on the aminopeptidase M-catalyzed hydrolysis of enkephalins☆()
title_sort effect of n-terminal acetylation and the inhibition activity of acetylated enkephalins on the aminopeptidase m-catalyzed hydrolysis of enkephalins☆()
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7124199/
https://www.ncbi.nlm.nih.gov/pubmed/10503775
http://dx.doi.org/10.1016/S0196-9781(99)00089-3
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