Abstract
Certain serotypes of group A streptococci possess the ability to produce opalescence in human or animal sera. This serum opacity reaction is mediated by a factor (OF) which acts upon the α1-lipoprotein fraction of serum. The extracellular OF elaborated by a strain of group A streptococcus M type 2 was purified by ammonium sulphate precipitation, DEAE-cellulose and hydroxylapatite column chromatography and Sephadex G-200 gel filtration. Gel filtration experiments indicated that the OF is constituted of high molecular weight proteins or protein aggregates which appear to dissociate into subunits of 66000 minimum molecular weight as determined by sodium dodecyl sulphate-polyacrylamide gel electrophoresis. The purified preparations had no group A carbohydrate or T protein antigens. Passive haemagglutination and indirect immunofluorescence tests indicated that Opacity Factor is distinct from the M type 2 protein antigen.
| Original language | English |
|---|---|
| Pages (from-to) | 29-38 |
| Number of pages | 10 |
| Journal | Journal of General Microbiology |
| Volume | 105 |
| Issue number | 1 |
| State | Published - Jan 1 1978 |
Fingerprint
ASJC Scopus subject areas
- Microbiology
Cite this
Purification of the extracellular opacity factor of a strain of group A streptococcus M type 2. / Martinez, Octavio V.; Rippe, D. F.; Fuller, L.; Streitfeld, M. M.
In: Journal of General Microbiology, Vol. 105, No. 1, 01.01.1978, p. 29-38.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Purification of the extracellular opacity factor of a strain of group A streptococcus M type 2
AU - Martinez, Octavio V.
AU - Rippe, D. F.
AU - Fuller, L.
AU - Streitfeld, M. M.
PY - 1978/1/1
Y1 - 1978/1/1
N2 - Certain serotypes of group A streptococci possess the ability to produce opalescence in human or animal sera. This serum opacity reaction is mediated by a factor (OF) which acts upon the α1-lipoprotein fraction of serum. The extracellular OF elaborated by a strain of group A streptococcus M type 2 was purified by ammonium sulphate precipitation, DEAE-cellulose and hydroxylapatite column chromatography and Sephadex G-200 gel filtration. Gel filtration experiments indicated that the OF is constituted of high molecular weight proteins or protein aggregates which appear to dissociate into subunits of 66000 minimum molecular weight as determined by sodium dodecyl sulphate-polyacrylamide gel electrophoresis. The purified preparations had no group A carbohydrate or T protein antigens. Passive haemagglutination and indirect immunofluorescence tests indicated that Opacity Factor is distinct from the M type 2 protein antigen.
AB - Certain serotypes of group A streptococci possess the ability to produce opalescence in human or animal sera. This serum opacity reaction is mediated by a factor (OF) which acts upon the α1-lipoprotein fraction of serum. The extracellular OF elaborated by a strain of group A streptococcus M type 2 was purified by ammonium sulphate precipitation, DEAE-cellulose and hydroxylapatite column chromatography and Sephadex G-200 gel filtration. Gel filtration experiments indicated that the OF is constituted of high molecular weight proteins or protein aggregates which appear to dissociate into subunits of 66000 minimum molecular weight as determined by sodium dodecyl sulphate-polyacrylamide gel electrophoresis. The purified preparations had no group A carbohydrate or T protein antigens. Passive haemagglutination and indirect immunofluorescence tests indicated that Opacity Factor is distinct from the M type 2 protein antigen.
UR - http://www.scopus.com/inward/record.url?scp=0017894808&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0017894808&partnerID=8YFLogxK
M3 - Article
C2 - 632809
AN - SCOPUS:0017894808
VL - 105
SP - 29
EP - 38
JO - Microbiology (United Kingdom)
JF - Microbiology (United Kingdom)
SN - 1350-0872
IS - 1
ER -