The secondary structure of staphylococcal enterotoxins A, B and C.
Biochim Biophys Acta
; 621(2): 233-40, 1980 Feb 27.
Article
em En
| MEDLINE
| ID: mdl-7353042
ABSTRACT
The circular dichroism (CD) of staphylococcal enterotoxins A, B and C was measured. The CD of enterotoxins B and C were almost identical from 250 to 320 nm, but differed from the CD of enterotoxin A. The spectrum of enterotoxin A in this wavelength region contained the same bands with respect to both location and sign, but with significant differences in intensity. The CD spectra of enterotoxins B and C were also much more alike from 190 to 250 nm. Although all three enterotoxins had a major negative extremum at 215--218 nm, its magnitude was equal in enterotoxins B and C, but was substantially decreased in enterotoxin A. The secondary structure of the enterotoxins contained little alpha-helix as analyzed with CD models. A secondary structure of entertoxin B compured from a scheme based on a joint prediction histogram of five separate methods, placed 29 residues in alpha-helices, 71 in beta-pleated sheets, 88 in beta-turns and 55 in aperiodic conformation.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Staphylococcus aureus
/
Enterotoxinas
Tipo de estudo:
Prognostic_studies
Idioma:
En
Revista:
Biochim Biophys Acta
Ano de publicação:
1980
Tipo de documento:
Article