A combined global and local approach to elucidate spatial organization of the Mycobacterial ParB-parS partition assembly.
Biochemistry
; 50(11): 1799-807, 2011 Mar 22.
Article
em En
| MEDLINE
| ID: mdl-21142182
ABSTRACT
Combining diverse sets of data at global (size, shape) and local (residue) scales is an emerging trend for elucidating the organization and function of the cellular assemblies. We used such a strategy, combining data from X-ray and neutron scattering with H/D-contrast variation and X-ray footprinting with mass spectrometry, to elucidate the spatial organization of the ParB-parS assembly from Mycobacterium tuberculosis. The ParB-parS participates in plasmid and chromosome segregation and condensation in predivisional bacterial cells. ParB polymerizes around the parS centromere(s) to form a higher-order assembly that serves to recruit cyto-skeletal ParA ATPases and SMC proteins for chromosome segregation. A hybrid model of the ParB-parS was built by combining and correlating computational models with experiment-derived information about size, shape, position of the symmetry axis within the shape, internal topology, DNA-protein interface, exposed surface patches, and prior knowledge. This first view of the ParB-parS leads us to propose how ParB spread on the chromosome to form a larger assembly.
Texto completo:
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Base de dados:
MEDLINE
Assunto principal:
Proteínas de Bactérias
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DNA Bacteriano
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Proteínas de Ligação a DNA
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Mycobacterium tuberculosis
Idioma:
En
Ano de publicação:
2011
Tipo de documento:
Article