Assuntos
Capsídeo/genética , Genes Virais , Antígenos do Núcleo do Vírus da Hepatite B/genética , Peptídeos/genética , Anticorpos Monoclonais , Capsídeo/imunologia , Clonagem Molecular , Ensaio de Imunoadsorção Enzimática , Escherichia coli/genética , Expressão Gênica , Antígenos do Núcleo do Vírus da Hepatite B/química , Espectroscopia de Ressonância Magnética , Peptídeos/química , Peptídeos/imunologia , Recombinação GenéticaRESUMO
Peptides obtained as a result of cyanogen bromide cleavage of the G-factor have been studied. All 12 peptides embracing the whole structure of fragment T4 have been isolated. For their amino acid sequence determination, cyanogen bromide peptides have been further cleaved with trypsin, chymotrypsin, thermolysin, staphylococcal glutamic protease and BNPS-skatole. The complete primary structure of 9 from 12 cyanogen bromide peptides has been determined.
Assuntos
Brometo de Cianogênio , Escherichia coli/genética , Fatores de Alongamento de Peptídeos/análise , Sequência de Aminoácidos , Cromatografia por Troca Iônica , Hidrólise , Fator G para Elongação de Peptídeos , TripsinaRESUMO
For fragment T4, obtained on limited trypsinolysis of the G-factor, the amino acid sequence embracing 76% of its structure has been determined by analysis of peptides resulting from the fragment T4 cleavage with staphylococcal glutamic protease. These data permitted to assemble into one polypeptide chain 7 out of 12 earlier characterized cyanogen bromide peptides contained in the fragment T4.
Assuntos
Endopeptidases/farmacologia , Escherichia coli/genética , Fatores de Alongamento de Peptídeos/análise , Fragmentos de Peptídeos/análise , Sequência de Aminoácidos , Cromatografia Líquida de Alta Pressão , Cromatografia por Troca Iônica , Brometo de Cianogênio , Hidrólise , Fator G para Elongação de PeptídeosRESUMO
Products of tryptic hydrolysis of the maleic anhydride modified fragment Th3 from limited thermolytic hydrolysis of the G-factor have been studied. Some short peptides which result from the trypsin action on the native G-factor molecule and belong to the fragment T4 obtained on limited trypsinolysis of the G-factor have been separated and their structure has been studied. As a result amino acid sequence has been determined by tryptic peptides containing 322 amino acid residues of the fragment T4 which makes up about 94% of its polypeptide chain.
Assuntos
Escherichia coli/genética , Fatores de Alongamento de Peptídeos/análise , Fragmentos de Peptídeos/análise , Tripsina , Sequência de Aminoácidos , Cromatografia em Gel , Eletroforese em Gel de Poliacrilamida , Hidrólise , Fator G para Elongação de PeptídeosRESUMO
The amino acid sequence of cysteine- and cystine-containing peptides resulting from cleavage of the G-factor by cyanogen bromide has been determined. For structure analysis cyanogen bromide peptides were further degradated using trypsin, chymotrypsin, thermolysin, staphylococcal glutamic protease, or limited acid hydrolysis. The products of the G-factor cleavage at Asp-Pro bonds were also studied. The obtained data together with those published earlier permitted to establish the complete primary structure of the elongation factor G. The polypeptide chain consists of 701 amino acid residues and has molecular mass of 77321,46.