共 27 条
A bacterial toxin that controls cell cycle progression as a deoxyribonuclease I-like protein
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作者:

Lara-Tejero, M
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Yale Univ, Sch Med, Boyer Ctr Mol Med, Sect Microbial Pathogenesis, New Haven, CT 06536 USA Yale Univ, Sch Med, Boyer Ctr Mol Med, Sect Microbial Pathogenesis, New Haven, CT 06536 USA

Galán, JE
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Yale Univ, Sch Med, Boyer Ctr Mol Med, Sect Microbial Pathogenesis, New Haven, CT 06536 USA Yale Univ, Sch Med, Boyer Ctr Mol Med, Sect Microbial Pathogenesis, New Haven, CT 06536 USA
机构:
[1] Yale Univ, Sch Med, Boyer Ctr Mol Med, Sect Microbial Pathogenesis, New Haven, CT 06536 USA
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D O I:
10.1126/science.290.5490.354
中图分类号:
O [数理科学和化学];
P [天文学、地球科学];
Q [生物科学];
N [自然科学总论];
学科分类号:
07 ;
0710 ;
09 ;
摘要:
Many bacterial pathogens encode a multisubunit toxin, termed cytolethal distending toxin (CDT), that induces cell cycle arrest, cytoplasm distention, and, eventually, chromatin fragmentation and cell death. In one such pathogen, Campylobacter jejuni, one of the subunits of this toxin, CdtB, was shown to exhibit features of type I deoxyribonucleases. Transient expression of this subunit in cultured cells caused marked chromatin disruption. Microinjection of Low amounts of CdtB induced cytoplasmic distention and cell cycle arrest. CdtB mutants with substitutions in residues equivalent to those required for catalysis or magnesium binding in type I deoxyribonucleases did not cause chromatin disruption. CDT holotoxin containing these mutant forms of CdtB did not induce morphological changes or cell cycle arrest.
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页码:354 / 357
页数:4
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