Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
45
pubmed:dateCreated
1998-12-10
pubmed:abstractText
Proenkephalin-A (PEA) and its derived peptides (PEAP) have been described in neural, neuroendocrine tissues and immune cells. The processing of PEA has been extensively studied in the adrenal medulla chromaffin cell showing that maturation starts with the removal of the carboxyl-terminal PEAP209-239. In 1995, our laboratory has shown that antibacterial activity is present within the intragranular chromaffin granule matrix and in the extracellular medium following exocytosis. More recently, we have identified an intragranular peptide, named enkelytin, corresponding to the bisphosphorylated PEAP209-237, that inhibits the growth of Micrococcus luteus (Goumon, Y., Strub, J. M., Moniatte, M., Nullans, G., Poteur, L., Hubert, P., Van Dorsselaer, A., Aunis, D., and Metz-Boutigue, M. H. (1996) Eur. J. Biochem. 235, 516-525). As a continuation of this previous study, in order to characterize the biological function of antibacterial PEAP, we have here examined whether this COOH-terminal fragment is released from stimulated chromaffin cells and whether it could be detected in wound fluids and in polymorphonuclear secretions following cell stimulation. The antibacterial spectrum shows that enkelytin is active against several Gram-positive bacteria including Staphylococcus aureus, but it is unable to inhibit the Gram-negative bacteria growth. In order to relate the antibacterial activity of enkelytin with structural features, various synthetic enkelytin-derived peptides were tested. We also propose a computer model of synthetic PEAP209-237 deduced from 1H NMR analysis, in order to relate the antibacterial activity of enkelytin with the three-dimensional structure. Finally, we report the high phylogenetic conservation of the COOH-terminal PEAP, which implies some important biological function and we discuss the putative importance of enkelytin in the defensive processes.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Nov
pubmed:issn
0021-9258
pubmed:author
pubmed:issnType
Print
pubmed:day
6
pubmed:volume
273
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
29847-56
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed-meshheading:9792701-Adrenal Glands, pubmed-meshheading:9792701-Amino Acid Sequence, pubmed-meshheading:9792701-Animals, pubmed-meshheading:9792701-Anti-Bacterial Agents, pubmed-meshheading:9792701-Body Fluids, pubmed-meshheading:9792701-Cattle, pubmed-meshheading:9792701-Cells, Cultured, pubmed-meshheading:9792701-Chromaffin Granules, pubmed-meshheading:9792701-Computer Simulation, pubmed-meshheading:9792701-Enkephalins, pubmed-meshheading:9792701-Humans, pubmed-meshheading:9792701-Infection, pubmed-meshheading:9792701-Magnetic Resonance Spectroscopy, pubmed-meshheading:9792701-Molecular Sequence Data, pubmed-meshheading:9792701-Peptide Fragments, pubmed-meshheading:9792701-Protein Conformation, pubmed-meshheading:9792701-Sequence Homology, Amino Acid, pubmed-meshheading:9792701-Spectrometry, Mass, Matrix-Assisted Laser...
pubmed:year
1998
pubmed:articleTitle
Characterization of antibacterial COOH-terminal proenkephalin-A-derived peptides (PEAP) in infectious fluids. Importance of enkelytin, the antibacterial PEAP209-237 secreted by stimulated chromaffin cells.
pubmed:affiliation
INSERM, Unité 338 de Biologie de la Communication Cellulaire, Strasbourg, France.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't