Lucie S Heath

Learn More
We have isolated and characterized cDNA encoding a human 58-kDa protein kinase that is homologous to the cell division control (CDC) protein kinases. This protein kinase also contains a unique N-terminal domain that may potentially regulate its function. Due to its relatedness to p34CDC2, the human p58 cDNA was overexpressed in CHO cells to determine the(More)
Minimal ectopic expression of a 58-kDa protein kinase (PITSLRE beta 1), distantly related to members of the cdc2 gene family, induces telophase delay, abnormal chromosome segregation, and decreased growth rates in Chinese hamster ovary cells. Here we show that this decrease in cell growth rate is due to apoptosis. Apoptosis is also induced by ectopic(More)
Staphylococcus simulans biovar staphylolyticus produces an extracellular glycylglycine endopeptidase (lysostaphin) that lyses other staphylococci by hydrolyzing the cross bridges in their cell wall peptidoglycans. The genes for endopeptidase (end) and endopeptidase resistance (epr) reside on plasmid pACK1. An 8.4-kb fragment containing end was cloned into(More)
Pyrimidine-mediated regulation of pyrBI operon expression in Escherichia coli K-12 occurs through UTP-sensitive transcriptional attenuation and through a second mechanism that functions at the level of transcriptional initiation. In this study we demonstrate that this second control mechanism is based on UTP-sensitive reiterative RNA synthesis within a run(More)
Zoocin A is a streptococcolytic peptidoglycan hydrolase with an unknown site of action that is produced by Streptococcus equi subsp. zooepidemicus 4881. Zoocin A has now been determined to be a d-alanyl-l-alanine endopeptidase by digesting susceptible peptidoglycan with a combination of mutanolysin and zoocin A, separating the resulting muropeptides by(More)
Murine bone-marrow-culture-derived-macrophages can be differentially activated to lyse either vesicular stomatitis virus infected BALB/c3T3 cells or the tumor target P815. Macrophages were activated in a manner so that they could lyse both targets. The ability of this activated population to lyse either target type was differentially inhibited by varying(More)
Staphylococcus simulans biovar staphylolyticus, the lysostaphin-producing organism, secretes a staphylolytic endopeptidase (EC 3.4.99.17) that is encoded on plasmid pACK1. Susceptibility of pACK1-cured strains to lysis by endopeptidase established that resistance to this enzyme is not an inherent property of the organism but rather is encoded on this(More)
Zoocin A is a streptococcolytic enzyme produced by Streptococcus equi subsp. zooepidemicus 4881 that has an unknown site of action on the peptidoglycans of susceptible organisms. Analysis of a mutant strain in which the genes for zoocin A and resistance to zoocin A were inactivated revealed that this strain was more susceptible to beta-lactam antibiotics(More)