Structures of ParB bound to DNA reveal mechanism of partition complex formation

Article Abstract:

Structures of ParB bound to partition sites where ParB forms an asymmetric dimer with extended amino-terminal helix-turn-helix domains that contact A-boxes are described. These structural features of ParB explain how the protein can bind complex arrays of A and B-box elements on adjacent DNA arms of the looped partition site.

United States, Prokaryotes, Protein binding, Cell division

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Segrosome structure revealed by a complex of ParR with centromere DNA

Article Abstract:

The structure of the pSK41 segrosome exposed in the crystal structure of ParR-DNA complex is presented. The dimer-of-dimers unite in a continuous protein super-helical array, covering the DNA about its positive convex surface, indicating a system for ParM capture and subsequent plasmid segregation.

Biological Product (except Diagnostic) Manufacturing, Drugs, Deoxyribonucleic Acid, DNA, Plasmids, Composition, Structure, Centromeres

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Structure of the gated domain of a CA2+-activated K+ channel complexed with Ca2+/calmodulin

Article Abstract:

Research into the gating of small-conductance Ca2+-activated K+ channels (SK channels) is described. The study indicates a potential gating mechanism for the SK channel CaMBD/Ca2+/CaM complex.

Calmodulin, Letter to the Editor, Membranes (Biology)

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