title: [Isolation and properties of B. subtilis DNA-binding proteins inhibiting ATP-dependent deoxyribonuclease].
abstract: The fraction inhibiting ATP-dependent DNAase and some other enzyme activities was found in B. subtilis cell extracts. Two methods of its isolation were elaborated. It is established that the inhibiting activity fraction represents a set of some positively charged thermostable proteins of low molecular weight (M 9000--25 000). The inhibiting effect of the proteins in question may be attributed to their ability to form a complex with DNA. The complex is formed in low ionic strength conditions. The elevation of NaCl concentration to 0,3 M removes some proteins from the complex and causes the complete loss of inhibiting activity. At 0,5 M NaCl DNA-protein complex is completely dissociated. The discovered proteins seems to be localized in DNA-membrane cell fraction. It is supposed that these proteins (or some of them) are the structural ones of the bacterial nucleoid.
mesh_terms: D000255:Adenosine Triphosphate / Q000494:pharmacology; D001412:Bacillus subtilis / Q000201:enzymology*; D001426:Bacterial Proteins / Q000302:isolation & purification / Q000502:physiology*; D002352:Carrier Proteins / Q000302:isolation & purification / Q000502:physiology*; D004247:DNA / Q000378:metabolism*; D003851:Deoxyribonucleases / Q000378:metabolism*; D008970:Molecular Weight
chemical_list: D001426:Bacterial Proteins; D002352:Carrier Proteins; D000255:Adenosine Triphosphate; D004247:DNA; D003851:Deoxyribonucleases
vernacular_title: Vydelenie i svoistva DNK-sviazyvaiushchikh belkov Bactillus subtilis, ingibiruiushchikh ATP-zavisimuiu dezoksiribonukleazu.