6RYK
Crystal structure of the ParB-like protein PadC
Summary for 6RYK
| Entry DOI | 10.2210/pdb6ryk/pdb |
| Descriptor | ParB-like nuclease domain protein, MAGNESIUM ION, CYTIDINE-5'-TRIPHOSPHATE, ... (5 entities in total) |
| Functional Keywords | parabs, cytoskeleton, bactofilin, ctp, cell cycle |
| Biological source | Myxococcus xanthus DK 1622 |
| Total number of polymer chains | 2 |
| Total formula weight | 51622.17 |
| Authors | Altegoer, F.,Bange, G. (deposition date: 2019-06-10, release date: 2020-01-22, Last modification date: 2024-05-15) |
| Primary citation | Osorio-Valeriano, M.,Altegoer, F.,Steinchen, W.,Urban, S.,Liu, Y.,Bange, G.,Thanbichler, M. ParB-type DNA Segregation Proteins Are CTP-Dependent Molecular Switches. Cell, 179:1512-1524.e15, 2019 Cited by PubMed Abstract: During cell division, newly replicated DNA is actively segregated to the daughter cells. In most bacteria, this process involves the DNA-binding protein ParB, which condenses the centromeric regions of sister DNA molecules into kinetochore-like structures that recruit the DNA partition ATPase ParA and the prokaroytic SMC/condensin complex. Here, we report the crystal structure of a ParB-like protein (PadC) that emerges to tightly bind the ribonucleotide CTP. The CTP-binding pocket of PadC is conserved in ParB and composed of signature motifs known to be essential for ParB function. We find that ParB indeed interacts with CTP and requires nucleotide binding for DNA condensation in vivo. We further show that CTP-binding modulates the affinity of ParB for centromeric parS sites, whereas parS recognition stimulates its CTPase activity. ParB proteins thus emerge as a new class of CTP-dependent molecular switches that act in concert with ATPases and GTPases to control fundamental cellular functions. PubMed: 31835030DOI: 10.1016/j.cell.2019.11.015 PDB entries with the same primary citation |
| Experimental method | X-RAY DIFFRACTION (1.7 Å) |
Structure validation
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