title: [Intercellular matrix of Bacillus subtilis 271: polymeric composition and function].
abstract: It was found that the intercellular matrix of Bacillus subtilis 271 mainly consists of alpha-1,4-glucan (65% of dry matter), branched at some C-3 residues of the polymeric chain, and poly-D-glutamic acid (19% of dry matter). The kinematic viscosity of aqueous solutions of the native matrix was four times as great as that of deproteinized matrix. Increasing the pH of aqueous solutions of the native matrix from 4 to 6 or decreasing their temperature from 38.5 to 11.5 degrees C caused a three- and sevenfold increase in the viscosity of these solutions, respectively. The integrity of the matrix appears to be essential for maintaining the homeostasis of Bacillus subtilis populations.
authors.affiliation: Moscow State University, Vorob'evy gory, Russia.
authors.forename: I Iu
authors.initials: IIu
authors.lastname: Safronova
authors.forename: I V
authors.initials: IV
authors.lastname: Botvinko
mesh_terms: D001412:Bacillus subtilis / Q000737:chemistry* / Q000502:physiology / Q000648:ultrastructure; D001704:Biopolymers; D005109:Extracellular Matrix / Q000737:chemistry* / Q000502:physiology; D005936:Glucans / Q000032:analysis*; D006706:Homeostasis; D006863:Hydrogen-Ion Concentration; D011099:Polyglutamic Acid / Q000032:analysis; D014783:Viscosity
chemical_list: D001704:Biopolymers; D005936:Glucans; D011099:Polyglutamic Acid; C040088:1,4-glucan
vernacular_title: Mezhkletochnyĭ matriks Bacillus subtilis 271: polimernyĭ sostav i funktsii.