Purification and partial characterization of a Vibrio hollisae hemolysin that relates to the thermostable direct hemolysin of Vibrio parahaemolyticus

1986 ◽  
Vol 32 (8) ◽  
pp. 632-636 ◽  
Author(s):  
Myonsun Yoh ◽  
Takeshi Honda ◽  
Toshio Miwatani
Keyword(s):  
Sodium Dodecyl Sulfate ◽  
Gel Electrophoresis ◽  
Vibrio Parahaemolyticus ◽  
Polyacrylamide Gel Electrophoresis ◽  
Sodium Dodecyl ◽  
Cross Reactivity ◽  
Diethylaminoethyl Cellulose ◽  
Dodecyl Sulfate ◽  
Thermostable Direct Hemolysin ◽  
Vibrio Hollisae

Hemolysin produced by Vibrio hollisae (Vh-rTDH), which is related to the thermostable direct hemolysin (Vp-TDH) of Vibrio parahaemolyticus, was studied. Vh-rTDH was purified by successive column chromatographies on diethylaminoethyl-cellulose and an immunoaffinity column coupled with anti Vp-TDH immunoglobulin. The purified toxin was homogeneous, as demonstrated by conventional and sodium dodecyl sulfate–polyacrylamide gel electrophoresis (PAGE). The molecular weight of Vh-rTDH was slightly smaller than that of Vp-TDH, as determined by sodium dodecyl sulfate – slab gel electrophoresis. Conventional PAGE also showed a difference between Vh-rTDH and Vp-TDH. Vp-TDH and Vh-rTDH showed different lytic activities on erythrocytes from various animals, in particular chicken, sheep, and calf. The hemolytic activity of Vh-rTDH was heat labile when heated at 70 °C for 10 min, unlike Vp-TDH. Immunological cross-reactivity between Vh-rTDH and Vp-TDH was demonstrated by both the Ouchterlony test and neutralization test.

Semipreparative isolation of collagen types I, II, III and V by sodium dodecyl sulfate-polyacrylamide gel electrophoresis and electroelution

1997 ◽  
Vol 758 (2) ◽  
pp. 313-318 ◽  
Author(s):  
Yahya Açil ◽  
Jürgen Brinckmann ◽  
Peter Behrens ◽  
Peter K. Müller ◽  
Boris Bätge
Keyword(s):  
Sodium Dodecyl Sulfate ◽  
Gel Electrophoresis ◽  
Polyacrylamide Gel Electrophoresis ◽  
Sodium Dodecyl ◽  
Polyacrylamide Gel ◽  
Collagen Types ◽  
Dodecyl Sulfate

Estimation of the size of collagenous polypeptides by sodium dodecyl sulfate-polyacrylamide gel electrophoresis

1981 ◽  
Vol 110 (1) ◽  
pp. 131-136 ◽  
Author(s):  
Milton E. Noelken ◽  
Billie J. Wisdom ◽  
Billy G. Hudson
Keyword(s):  
Sodium Dodecyl Sulfate ◽  
Gel Electrophoresis ◽  
Polyacrylamide Gel Electrophoresis ◽  
Sodium Dodecyl ◽  
Polyacrylamide Gel ◽  
Dodecyl Sulfate

Covalent guanylyl intermediate formed by HeLa cell mRNA capping enzyme

1982 ◽  
Vol 2 (8) ◽  
pp. 993-1001
Author(s):  
D Wang ◽  
Y Furuichi ◽  
A J Shatkin
Keyword(s):  
Sodium Dodecyl Sulfate ◽  
Hela Cell ◽  
Gel Electrophoresis ◽  
Polyacrylamide Gel Electrophoresis ◽  
Sodium Dodecyl ◽  
Polyacrylamide Gel ◽  
Enzyme Complex ◽  
Cell Nuclei ◽  
Dodecyl Sulfate ◽  
Enzyme Intermediate

Guanylyltransferase, an enzyme that catalyzes formation of mRNA 5'-terminal caps, was isolated from HeLa cell nuclei. The partially purified preparation, after incubation with [alpha-32P]GTP, yielded a single radiolabeled polypeptide by sodium dodecyl sulfate-polyacrylamide gel electrophoresis. The guanylylated product was stable at neutral and alkaline pHs and had a pI of 4 by isoelectric focusing. An apparent molecular weight of approximately 68,000 was estimated by sodium dodecyl sulfate-polyacrylamide gel electrophoresis under reducing conditions. The formation of a covalently linked, radiolabeled GMP-protein complex and the associated release of PPi required the presence of [alpha-32P]GTP and divalent cations and incubation between pH 7 and 9. Reaction with [beta-32P]GTP, [alpha-32P]CTP, [alpha-32P]UTP, or [alpha-32P]ATP did not label the approximately 68,000-dalton polypeptide. Phosphoamide linkage of the GMP-enzyme complex was indicated by its sensitivity to cleavage by acidic hydroxylamine or HCl and not by NaOH or alkaline phosphatase. Both formation of the GMP-enzyme intermediate and synthesis of cap structures of type GpppApG from GTP and ppApG were remarkably temperature independent; the rates of enzyme activity at 0 to 4 degrees C were 30% or more of those obtained at 37 degrees C. Radiolabeled GMP-enzyme complex, isolated by heparin-Sepharose chromatography from reaction mixtures, functioned effectively as a GMP donor for cap synthesis with 5'-diphosphorylated oligo- and polynucleotide acceptors. Alternatively, protein-bound GMP could be transferred to PPi to form GTP. The formation of a guanylylated enzyme intermediate appears to be characteristic of viral and cellular guanylyltransferases that modify eucaryotic mRNA 5' termini.

Isolation, purification, and characterization of a peptide that contains the β-ketoacyl reductase, enoyl reductase, and β-hydroxyacyl dehydrase activities of the pigeon liver fatty acid synthetase

1985 ◽  
Vol 63 (1) ◽  
pp. 50-56
Author(s):  
Rajinder N. Puri ◽  
John W. Porter
Keyword(s):  
Fatty Acid ◽  
Sodium Dodecyl Sulfate ◽  
Gel Electrophoresis ◽  
Polyacrylamide Gel Electrophoresis ◽  
Sodium Dodecyl ◽  
Fatty Acid Synthetase ◽  
Polyacrylamide Gel ◽  
Liver Fatty Acid ◽  
Dodecyl Sulfate ◽  
Pigeon Liver

Controlled proteolytic cleavage of pigeon liver fatty acid synthetase with elastase (4% w/w) for 5 h yields two peptides that are designated II and IV. After 5 h of proteolysis the incubation mixture containing these peptides retains all of the component enzyme activities of the fatty acid synthetase complex. The two peptides are then separated by chromatography on an Affi-Gel Blue column. Gel filtration of the fraction containing peptide II yields a homogeneous peptide as shown by polyacrylamide gel electrophoresis in the presence and absence of sodium dodecyl sulfate. The molecular weight of this peptide has been estimated to be 130 000 by sodium dodecyl sulfate – polyacrylamide gel electrophoresis, size exclusion chromatography, and amino acid analysis. The sedimentation coefficient for peptide II is approximately 7.4S. Peptide II contains the domains for the β-ketoacyl and enoyl reductases and β-hydroxyacyl dehydrase activities of the fatty acid synthetase complex.

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