Cohesin complexes mediate sister-chromatid cohesion in dividing cells but may also contribute to gene regulation in postmitotic cells. How cohesin regulates gene expression is not known. Here we describe cohesin-binding sites in the human genome and show that most of these are associated with the CCCTC-binding factor (CTCF), a zinc-finger protein required… (More)
Salmonella develops into resident bacteria in epithelial cells, and the autophagic machinery (Atg) is thought to play an important role in this process. In this paper, we show that an autophagosome-like double-membrane structure surrounds the Salmonella still residing within the Salmonella-containing vacuole (SCV). This double membrane is defective in… (More)
Appropriate resources and expression technology necessary for human proteomics on a whole-proteome scale are being developed. We prepared a foundation for simple and efficient production of human proteins using the versatile Gateway vector system. We generated 33,275 human Gateway entry clones for protein synthesis, developed mRNA expression protocols for… (More)
Nucleocytoplasmic transport factors mediate various cellular processes, including nuclear transport, spindle assembly, and nuclear envelope/pore formation. In this paper, we identify the chromokinesin human kinesin-like DNA binding protein (hKid) as an import cargo of the importin-alpha/beta transport pathway and determine its nuclear localization signals… (More)
Nalidixic acid, novobiocin and coumermycin specifically inhibit phage promoter-dependent transcription of the trp operon in phi 80 ptrp but not transcription from the authentic trp promoter. The nalidixic acid inhibition is not observed in an E. coli strain containing a nalAr mutation. These results indicate that DNA gyrase is involved in transcription.
In the hin-mediated DNA inversion system, HU facilitates formation of the synaptic complex composed of two recombination sites spaced 996 bp apart and of the enhancer situated between them, by looping the DNA as to promote interaction of Hin invertase with the Fis enhancer factor [Johnson et al., Nature 329 (1987) 462-465]. The HU requirement for the in… (More)