Alexander Magee

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Orofacial clefting is genetically complex, no single gene being responsible for all forms. It can, however, result from a single gene defect either as part of a syndrome (e.g. van der Woude syndrome, Treacher-Collins syndrome, velo-cardio-facial syndrome) or as an isolated phenotypic effect (e.g. X-linked cleft palate; non-syndromic, autosomal dominant(More)
Synthesis of the Streptococcus pneumoniae type 3 capsule requires the pathway glucose-6-phosphate (Glc-6-P) --> Glc-1-P --> UDP-Glc --> UDP-glucuronic acid (UDP-GlcUA) --> (GlcUA-Glc)(n). The UDP-Glc dehydrogenase and synthase necessary for the latter two steps, and essential for capsule production, are encoded by genes (cps3D and cps3S, respectively)(More)
Nasopharyngeal colonization is a necessary first step in the pathogenesis of Streptococcus pneumoniae. Using isolates containing defined mutations in the S. pneumoniae capsule locus, we found that expression of the capsular polysaccharide is essential for colonization by the type 2 strain D39 and the type 3 strains A66 and WU2. Nonencapsulated derivatives(More)
Mutation hotspots have been a staple of mutation spectra since the introduction of fine structure mutation mapping almost 40 years ago. It has been well established that sequence context is an important determinant of mutational activity at mutagen induced hotspots and coldspots. However, our understanding of the sequence effectors of base substitution(More)
Base substitution mutation frequency is influenced by the sequence context surrounding lesions in the DNA. We have been studying ultraviolet mutagenesis in human repair-deficient cells in the supF marker gene carried in a shuttle vector plasmid. There are prominent hotspots, on opposite strands, at the 5' TC sites in the eight base palindrome 5' CTTCGAAG.(More)
PKA (protein kinase A) in the fission yeast Schizosaccharomyces pombe controls transcription of genes involved in metabolism, cell growth and sexual development. In the present review, we discuss phenotypes associated with either high or low PKA activity in the context of how they can be used to carry out genetic or small-molecule screens that affect(More)
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