Abstract
During purification of a strand exchange activity from Schizosaccharomyces pombe using the three-strand reaction of double-stranded linear and circular single-stranded DNA, we identified p190/210 as an activity that stimulated the strand exchange activity of p140(exo2) by about 10-fold. The accompanying report (Kaslin, E., and Heyer, W.-D. (1994) J. Biol. Chem. 269, 0000-0000) described the purification and characterization of p140(exo2), likely to be the S. pombe homolog of the Saccharomyces cerevisiae strand exchange protein p175(SEP)1. Here, we report the purification of p190/210 from S. pombe cells and its identification as fatty acid synthase (FAS). S. pombe FAS (p190/210) binds to single-stranded and double-stranded DNA, leading to condensation of DNA into large aggregates. In addition, it is capable of renaturing complementary single-stranded DNA. Besides stimulating the strand exchange activity of p140(exo2), FAS (p190/210) itself exhibits strand exchange activity provided the double-stranded substrate has single-stranded tails. We propose a probable mechanism for the action of FAS (p190/210) during DNA strand exchange in vitro. Since FAS (p190/210) is highly unlikely to have a role in homologous recombination in vivo, we discuss the implications of our data on the interpretation of other homologous pairing and strand exchange proteins purified from eukaryotes using this or similar assays.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 14103-14110 |
| Number of pages | 8 |
| Journal | Journal of Biological Chemistry |
| Volume | 269 |
| Issue number | 19 |
| State | Published - May 13 1994 |
| Externally published | Yes |
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ASJC Scopus subject areas
- Biochemistry
Cite this
Schizosaccharomyces pombe fatty acid synthase mediates DNA strand exchange in vitro. / Käslin, Edgar; Heyer, Wolf Dietrich.
In: Journal of Biological Chemistry, Vol. 269, No. 19, 13.05.1994, p. 14103-14110.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Schizosaccharomyces pombe fatty acid synthase mediates DNA strand exchange in vitro
AU - Käslin, Edgar
AU - Heyer, Wolf Dietrich
PY - 1994/5/13
Y1 - 1994/5/13
N2 - During purification of a strand exchange activity from Schizosaccharomyces pombe using the three-strand reaction of double-stranded linear and circular single-stranded DNA, we identified p190/210 as an activity that stimulated the strand exchange activity of p140(exo2) by about 10-fold. The accompanying report (Kaslin, E., and Heyer, W.-D. (1994) J. Biol. Chem. 269, 0000-0000) described the purification and characterization of p140(exo2), likely to be the S. pombe homolog of the Saccharomyces cerevisiae strand exchange protein p175(SEP)1. Here, we report the purification of p190/210 from S. pombe cells and its identification as fatty acid synthase (FAS). S. pombe FAS (p190/210) binds to single-stranded and double-stranded DNA, leading to condensation of DNA into large aggregates. In addition, it is capable of renaturing complementary single-stranded DNA. Besides stimulating the strand exchange activity of p140(exo2), FAS (p190/210) itself exhibits strand exchange activity provided the double-stranded substrate has single-stranded tails. We propose a probable mechanism for the action of FAS (p190/210) during DNA strand exchange in vitro. Since FAS (p190/210) is highly unlikely to have a role in homologous recombination in vivo, we discuss the implications of our data on the interpretation of other homologous pairing and strand exchange proteins purified from eukaryotes using this or similar assays.
AB - During purification of a strand exchange activity from Schizosaccharomyces pombe using the three-strand reaction of double-stranded linear and circular single-stranded DNA, we identified p190/210 as an activity that stimulated the strand exchange activity of p140(exo2) by about 10-fold. The accompanying report (Kaslin, E., and Heyer, W.-D. (1994) J. Biol. Chem. 269, 0000-0000) described the purification and characterization of p140(exo2), likely to be the S. pombe homolog of the Saccharomyces cerevisiae strand exchange protein p175(SEP)1. Here, we report the purification of p190/210 from S. pombe cells and its identification as fatty acid synthase (FAS). S. pombe FAS (p190/210) binds to single-stranded and double-stranded DNA, leading to condensation of DNA into large aggregates. In addition, it is capable of renaturing complementary single-stranded DNA. Besides stimulating the strand exchange activity of p140(exo2), FAS (p190/210) itself exhibits strand exchange activity provided the double-stranded substrate has single-stranded tails. We propose a probable mechanism for the action of FAS (p190/210) during DNA strand exchange in vitro. Since FAS (p190/210) is highly unlikely to have a role in homologous recombination in vivo, we discuss the implications of our data on the interpretation of other homologous pairing and strand exchange proteins purified from eukaryotes using this or similar assays.
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M3 - Article
VL - 269
SP - 14103
EP - 14110
JO - Journal of Biological Chemistry
JF - Journal of Biological Chemistry
SN - 0021-9258
IS - 19
ER -