The histones of the insect trypanosomatid, Crithidia fasciculata.
Biochim Biophys Acta
; 1040(2): 159-66, 1990 Sep 03.
Article
em En
| MEDLINE
| ID: mdl-2400769
The histone-like proteins of the monogenetic parasite Crithidia fasciculata were extracted with 0.2 M sulfuric acid either from purified nuclei, or from purified chromatin, in both cases in the presence of 1 mM tosyl lysylchloromethylketone and 2 mM phenyl methyl sulfonyl fluoride as proteinase inhibitors. The presence of histones in the flagellate, nonidentical with those from calf thymus used as controls, was shown by their electrophoretic patterns in three different polyacrylamide gel systems; their staining with Alkaline fast green, specific for basic proteins; their global amino acid composition and absorption spectrum and their molecular weights. The protein showing the slower mobility in SDS gels and the fastest mobility in the urea-acetic acid-Triton gels, seems to be an H1 histone, because of its metachromatic staining with Coomassie brilliant blue, solubility characteristics, differential destaining properties and amino acid composition. Band 5 in Triton-urea-acetic acid gels is probably an HMG protein. We conclude that C. fasciculata has a complete set of histones and that the lack of chromosome condensation during mitosis is not due to lack of histone H1.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Histonas
/
Crithidia
Limite:
Animals
Idioma:
En
Revista:
Biochim Biophys Acta
Ano de publicação:
1990
Tipo de documento:
Article
País de afiliação:
Argentina
País de publicação:
Holanda