@article{shockley_scott_pysz_conners_johnson_montero_wolfinger_kelly_2005, title={Genorne-wide transcriptional variation within and between steady states for continuous growth of the hyperthermophile Thermotoga maritima}, volume={71}, ISSN={["1098-5336"]}, DOI={10.1128/AEM.71.9.5572-5576.2005}, abstractNote={ABSTRACT}, number={9}, journal={APPLIED AND ENVIRONMENTAL MICROBIOLOGY}, author={Shockley, KR and Scott, KL and Pysz, MA and Conners, SB and Johnson, MR and Montero, CI and Wolfinger, RD and Kelly, RM}, year={2005}, month={Sep}, pages={5572–5576} } @article{johnson_montero_conners_shockley_pysz_kelly_2004, title={Functional genomics-based studies of the microbial ecology of hyperthermophilic micro-organisms}, volume={32}, ISSN={["1470-8752"]}, DOI={10.1042/BST0320188}, abstractNote={Although much attention has been paid to the genetic, biochemical and physiological aspects of individual hyperthermophiles, how these unique micro-organisms relate to each other and to their natural habitats must be addressed in order to develop a comprehensive understanding of life at high temperatures. Phylogenetic 16 S rRNA-based profiling of samples from various geothermal sites has provided insights into community structure, but this must be complemented with efforts to relate metabolic strategies to biotic and abiotic characteristics in high-temperature habitats. Described here are functional genomics-based approaches, using cDNA microarrays, to gain insight into how ecological features such as biofilm formation, species interaction, and possibly even gene transfer may occur in native environments, as well as to determine what genes or sets of genes may be tied to environmental functionality.}, number={2004 Apr}, journal={BIOCHEMICAL SOCIETY TRANSACTIONS}, author={Johnson, MR and Montero, CI and Conners, SB and Shockley, KR and Pysz, MA and Kelly, RM}, year={2004}, month={Apr}, pages={188–192} } @misc{pysz_conners_montero_shockley_johnson_ward_kelly_2004, title={Transcriptional analysis of biofilm formation processes in the anaerobic, hyperthermophilic bacterium Thermotoga maritima}, volume={70}, ISSN={["1098-5336"]}, DOI={10.1128/AEM.70.10.6098-6112.2004}, abstractNote={ABSTRACT}, number={10}, journal={APPLIED AND ENVIRONMENTAL MICROBIOLOGY}, author={Pysz, MA and Conners, SB and Montero, CI and Shockley, KR and Johnson, MR and Ward, DE and Kelly, RA}, year={2004}, month={Oct}, pages={6098–6112} } @article{pysz_ward_shockley_montero_conners_johnson_kelly_2004, title={Transcriptional analysis of dynamic heat-shock response by the hyperthermophilic bacterium Thermotoga maritima}, volume={8}, ISSN={["1433-4909"]}, DOI={10.1007/s00792-004-0379-2}, abstractNote={The thermal stress response of the hyperthermophilic bacterium Thermotoga maritima was characterized using a 407-open reading frame-targeted cDNA microarray. Transient gene expression was followed for 90 min, following a shift from 80 degrees C to 90 degrees C. While some aspects of mesophilic heat-shock response were conserved in T. maritima, genome content suggested differentiating features that were borne out by transcriptional analysis. Early induction of predicted heat-shock operons hrcA-grpE-dnaJ (TM0851-TM0850-TM0849), groES-groEL (TM0505-TM0506), and dnaK-sHSP (TM0373-TM0374) was consistent with conserved CIRCE elements upstream of hrcA and groES. Induction of the T. maritima rpoE/ sigW and rpoD/ sigA homologs suggests a mechanism for global heat-shock response in the absence of an identifiable ortholog to a major heat-shock sigma factor. In contrast to heat-shock response in Escherichia coli, the majority of genes encoding ATP-dependent proteases were downregulated, including clpP (TM0695), clpQ (TM0521), clpY (TM0522), lonA (TM1633), and lonB (TM1869). Notably, T. maritima showed indications of a late heat-shock response with the induction of a marR homolog (TM0816), several other putative transcriptional regulators (TM1023, TM1069), and two alpha-glucosidases (TM0434 and TM1068). Taken together, the results reported here indicate that, while T. maritima shares core elements of the bacterial heat-shock response with mesophiles, the thermal stress regulatory strategies of this organism differ significantly. However, it remains to be elucidated whether these differences are related to thermophilicity or phylogenetic placement.}, number={3}, journal={EXTREMOPHILES}, author={Pysz, MA and Ward, DE and Shockley, KR and Montero, CI and Conners, SB and Johnson, MR and Kelly, RM}, year={2004}, month={Jun}, pages={209–217} } @article{gao_bauer_shockley_pysz_kelly_2003, title={Growth of hyperthermophilic Archaeon Pyrococcus futiosus on chitin involves two family 18 chitinases}, volume={69}, ISSN={["1098-5336"]}, DOI={10.1128/AEM.69.6.3119-3128.2003}, abstractNote={ABSTRACT}, number={6}, journal={APPLIED AND ENVIRONMENTAL MICROBIOLOGY}, author={Gao, J and Bauer, MW and Shockley, KR and Pysz, MA and Kelly, RM}, year={2003}, month={Jun}, pages={3119–3128} } @article{burke_ha_pysz_khan_2002, title={Rheology of protein gels synthesized through a combined enzymatic and heat treatment method}, volume={31}, ISSN={["0141-8130"]}, DOI={10.1016/S0141-8130(02)00043-0}, abstractNote={Whey protein gels prepared under acidic conditions (pH<4.6) remain largely unutilized because of their weak and brittle nature in contrast to the favorable elastic gels produced at neutral or basic conditions. However, such usage is important, as low pH food products are desirable due to their shelf stability and less stringent sterilization processes. In this study, we use a two-step process involving enzyme followed by heat treatment to produce whey protein gels at low pH (4.0). Dynamic rheological measurements reveal that the gel elastic modulus and yield stress increase substantially when heat treatment is supplemented with enzyme treatment. Both the elastic modulus and yield stress increase with increasing enzyme concentration or treatment time. In contrast, the dynamic yield strain decreases with enzyme concentration but increases with time of enzyme treatment. These results are explained in terms of the enzyme treatment time affecting the diffusion of the enzyme within the gel. This in turn leads to two types of gel microstructure at short and long enzyme treatment times, with the extent of enzyme diffusion modulating the structure at intermediate times.}, number={1-3}, journal={INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES}, author={Burke, MD and Ha, SY and Pysz, MA and Khan, SA}, year={2002}, month={Dec}, pages={37–44} }