Purification and characterization of a peptidoglycan-associated lipoprotein from Haemophilus influenzae.
J Biol Chem
; 263(20): 9790-4, 1988 Jul 15.
Article
em En
| MEDLINE
| ID: mdl-3290214
ABSTRACT
We have purified to homogeneity a peptidoglycan-associated protein from Haemophilus influenzae. Our purification process used differential extraction of cell envelopes with nondenaturing detergents. Solubilization of this protein was accomplished by heating a peptidoglycan-enriched subcellular fraction in the presence of one of several nondenaturing detergents at 55-60 degrees C. The purified protein migrated as a single band, with a Mr approximately 15,000, following sodium dodecyl sulfate-polyacrylamide gel electrophoresis. This protein contains covalently linked fatty acids, is rich in tyrosine, but lacks methionine and tryptophan. Amino acid analysis also revealed the presence of glycerylcysteine, which has been shown to be the site of fatty acylation in other bacterial lipoproteins. Over 87% of the primary structure has been determined by sequencing high pressure liquid chromatography purified fragments derived from several endoproteinase digests. This protein belongs to a family of proteins, known as peptidoglycan associated lipoproteins, which appear to be components of the outer membranes of most Gram-negative bacteria.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Proteoglicanas
/
Proteínas da Membrana Bacteriana Externa
/
Peptidoglicano
/
Haemophilus influenzae
/
Lipoproteínas
Tipo de estudo:
Risk_factors_studies
Idioma:
En
Revista:
J Biol Chem
Ano de publicação:
1988
Tipo de documento:
Article