title: Partial purification of a pea seed DNA-binding protein that specifically recognizes 5-methylcytosine.
abstract: Previously, a DNA-binding protein (DBPm) was identified in plant nuclei that may mediate the effects of DNA methylation on chromatin structure and transcription. In the present report, DBPm was partially purified from germinated pea (Pisum sativum) seed nuclear extracts by DEAE-cellulose, phenylsepharose, heparin-sepharose chromatography, and preparative mobility shift on polyacrylamide gels. The purified activity showed a band at approximately 50 kD by sodium dodecyl sulfate-polyacrylamide gel electrophoresis as well as by Sephadex G100 chromatography, suggesting that DBPm is present as a monomer.
authors.affiliation: Southern Regional Research Center, U.S. Department of Agriculture, New Orleans, LA 70179.
authors.forename: K C
authors.initials: KC
authors.lastname: Ehrlich
mesh_terms: D044503:5-Methylcytosine; D000645:Ammonium Sulfate; D001483:Base Sequence; D002467:Cell Nucleus / Q000737:chemistry; D011232:Chemical Precipitation; D002845:Chromatography; D002852:Chromatography, Ion Exchange; D003596:Cytosine / Q000031:analogs & derivatives* / Q000378:metabolism; D004268:DNA-Binding Proteins / Q000302:isolation & purification* / Q000378:metabolism; D004591:Electrophoresis, Polyacrylamide Gel; D007887:Fabaceae; D008969:Molecular Sequence Data; D008970:Molecular Weight; D010946:Plants, Medicinal; D012639:Seeds / Q000737:chemistry*; D012685:Sepharose / Q000031:analogs & derivatives
chemical_list: D004268:DNA-Binding Proteins; C037405:heparin-sepharose; D044503:5-Methylcytosine; C020927:phenyl-sepharose; D003596:Cytosine; D012685:Sepharose; D000645:Ammonium Sulfate