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Fungus Fungi are heterotrophic, that is they get their energy by breaking down organic molecules, and cannot synthesize organic molecules from inorganic substances like plant s. They feed by secreting exoenzyme s into the surrounding substrate. Exoenzymes act like the digestive enzyme s of animal s, breaking apart large organic molecules, but function outside the organism. www.nebulasearch.com /encyclopedia/article/Fungus.html   (1333 words)

Exoenzyme - Wikipedia, the free encyclopedia An exoenzyme, or extracellular enzyme, is an enzyme that is secreted by a cell and that works outside that cell. It is usually used for breaking up large molecules that would not be able to enter the cell otherwise. The opposite of an exoenzyme is called an endoenzyme. en.wikipedia.org /wiki/Exoenzyme   (80 words)

MB Folder\HTML\DiagnosisofPseudomonas Joseph Barbieri and Dara Frank have produced a genetic construct containing a coding region for the enzymatically active 49 kilodalton form of the Exoenzyme S protein. Exoenzyme S catalyzes the covalent transfer of the ADP-ribose portion of NAD to a number of eucaryotic target proteins, including the ras protein, which is a factor in the uncontrolled growth of cancer cells. Effects of differential expression of the 49-kilodalton exoenzyme S by Pseudomonas aeruginosa on cultured eukaryotic cells. www.mcw.edu /research/foundation/DiagnosisofPseudomonas.html   (428 words)

Pseudomonas aeruginosa Exoenzyme S Stimulates Murine Lymphocyte Proliferation In Vitro -- Barclay et al. 67 (9): 4613 ... Murine lymphocytes proliferate in response to stimulation with exoenzyme S. H]TdR incorporation is a measure of DNA synthesis and is often used to indicate lymphocyte proliferation. Different strains of mice vary in their proliferative responses to exoenzyme S. The availability of inbred strains of mice allow the comparison of potential genetic differences in the response to a stimulus. Correlation of Pseudomonas aeruginosa virulence factors from clinical and environmental isolates with pathogenicity in the neutropenic mouse. iai.asm.org /cgi/content/full/67/9/4613   (4281 words)

Yahr Publications   (Site not responding. Last check: 2007-10-30) Cloning the structural gene of the 49 kDa form of exoenzyme S (exoS) from Pseudomonas aeruginosa strain 388. Transcriptional organization of the trans-regulatory which controls exoenzyme S synthesis in Pseudomonas aeruginosa. Exoenzyme S of Pseudomonas aeruginosa is secreted by at type III pathway. www.medicine.uiowa.edu /microbiology/publications/yahr.htm   (287 words)

Exoenzyme C3 Literature ver. 2/00 Exoenzyme C3 is produced by certain type C and D strains of the anaerobic bacterium Exoenzyme C3 from List Biological Laboratories, Inc., is highly purified and migrates as a single band of molecular weight approximately 25,000 daltons when examined on 10% polyacrylamide-SDS gels. Exoenzyme C3 is provided as a lyophilized powder, sealed under vacuum. www.listlabs.com /Literature/143.htm   (791 words)

Medical College of Wisconsin - Joseph T. Barbieri We are currently determining the mechanism that FAS activates exoenzyme S. We hypothesize that FAS regulates expression of the catalytic activity of exoenzyme S at specific sites within the host. Second, we are characterizing the physiological consequence for the ADP-ribosylation of the Ras protein by exoenzyme S. Our goals are to determine which residue within the Ras protein is ADP-ribosylated by exoenzyme S and to determine the physiological consequence of the ADP-ribosylation of Ras. The cytotoxic phenotype of exoenzyme S is shown in the accompanying figure, where expression of exoenzyme S in CHO cells inhibits expression of Green Fluorescent Protein, as reporter of cell physiology. www.mcw.edu /display/router.asp?docid=7862   (1213 words)

Function of the Small Guanosine Triphosphate-Binding Protein RhoA in the Process of Implantation -- Shiokawa et al. 85 ... Treatment with C3 exoenzyme for 24 h caused cultured decidual cells to round up, and the decidual cells lost their actin stress fibers (B). Spreading of mouse blastocysts on human decidual cells treated with C3 exoenzyme or LPA after 96 h of coculture. Decidual cells were treated with C3 exoenzyme at a concentration of 1 (A), 10 (B), or 100 (C) ng/mL; with no addition (D); or with LPA at a concentration of 1 (E), 10 (F), or 100 (G) µmol/L. Bars, 100 µm. jcem.endojournals.org /cgi/content/full/85/12/4742   (4441 words)

ROCK and mDia1 antagonize in Rho-dependent Rac activation in Swiss 3T3 fibroblasts -- Tsuji et al. 157 (5): 819 -- The ...   (Site not responding. Last check: 2007-10-30) Swiss 3T3 cells were cultured and treated with either C3 exoenzyme or Y-27632 as described in the legend to Fig. C3 exoenzyme was purified as described (Morii and Narumiya, 1995). Botulinum C3 exoenzyme blocks the tyrosine phosphorylation of p125FAK and paxillin induced by bombesin and endothelin. www.jcb.org /cgi/content/full/157/5/819   (7249 words)

Pseudomonas aeruginosa Exoenzyme S Stimulates Murine Lymphocyte Proliferation In Vitro (ResearchIndex)   (Site not responding. Last check: 2007-10-30) The response was not due to lipopolysaccharide, since Rhodobacter sphaeroides lipid A antagonist did not block the response. Other preparations of exoenzyme S stimulated lymphocyte proliferation, since the response to recombinant exoenzyme S (rHisExo S) cloned from strain 388 was similar to the response to exoenzyme S from strain DG1. 1 Pseudomonas aeruginosa exoenzyme S is a mitogen (context) - Bruno, Syme et al. citeseer.ist.psu.edu /barclay99pseudomonas.html   (544 words)

RhoA and the Function of Platelet Integrin alpha IIbbeta 3 -- Leng et al. 91 (11): 4206 -- Blood C3 exoenzyme and 90% by 20 µg/mL of C3 (Fig 1). Effect of C3 exoenzyme on focal adhesions and stress fibers in A5 CHO cells adherent to fibrinogen. The most dramatic effect of C3 exoenzyme in fibrinogen-adherent platelets was on the number of focal adhesions (Fig 8). www.bloodjournal.org /cgi/content/full/91/11/4206   (5573 words)

[No title]   (Site not responding. Last check: 2007-10-30) Crystal structure and novel recognition motif of rho ADP-ribosylating C3 exoenzyme from Clostridium botulinum: structural insights for recognition specificity and catalysis. C3 thus represents a major family of the bacterial toxins that transfer the ADP-ribose moiety of NAD to specific amino acids in acceptor proteins to modify key biological activities in eukaryotic cells, including protein synthesis, differentiation, transformation, and intracellular signaling. Importantly, the central core of the C3 exoenzyme structure is distinguished by the absence of an active site loop observed in many other ADP-ribosylating toxins. www.scripps.edu /~arvai/papers/jmb2001.html   (439 words)

Genetic relationship between the 53- and 49-kilodalton forms of exoenzyme S from Pseudomonas aeruginosa -- Yahr et al. ... Genetic relationship between the 53- and 49-kilodalton forms of exoenzyme S from Pseudomonas aeruginosa -- Yahr et al. Exoenzyme S is an ADP-ribosylating extracellular protein of Pseudomonas Radke, J., Pederson, K. J., Barbieri, J. Pseudomonas aeruginosa Exoenzyme S Is a Biglutamic Acid ADP-Ribosyltransferase. jb.asm.org /cgi/content/abstract/178/5/1412   (1173 words)

Tim Yahr CV Exoenzyme S of Pseudomonas aeruginosa is secreted by a type III secretion pathway. The genetic relationship between the 49- and 53-kDa forms of exoenzyme S. General Meeting of the American Society for Microbiology, Washington, D.C. Yahr, T. and D. Frank. Transcriptional analysis of the exoenzyme S structural gene. www.dartmouth.edu /~wickner/people/Tim_CV.html   (870 words)

British Journal of Pharmacology - Mechanisms involved in carbachol-induced Ca2+ sensitization of contractile elements ...   (Site not responding. Last check: 2007-10-30) Utilizing C3 exoenzyme, a specific inhibitor of rho protein, and Y-27632 and HA 1077, rho kinase inhibitors, the involvement of a rho-rho kinase pathway in agonist-induced Ca sensitization was suggested in the rabbit aorta (Kokubu et al. The effects of C3 exoenzyme, which inactivates GTPase of the rho subfamily of ras-related low-molecular-mass GTPases, and a protein kinase C inhibitor peptide, PKC(19−31), on GTP- and CCh-induced Ca sensitization were examined. In the proximal colon, GTP plus CCh-induced Ca sensitization was very significantly inhibited by Y-27632 (Figure 3) and completely by C3 exoenzyme (Figure 7a), specific inhibitors of the rho pathway, whereas chelerythrine, an inhibitor of protein kinase C, had no effect (Figure 5a). www.labanimal.com /bjp/journal/v142/n4/full/0705820a.html   (6124 words)

Distinct fates of monocytes and T cells directly activated by Pseudomonas aeruginosa exoenzyme S -- Epelman et al. 71 ... Distinct fates of monocytes and T cells directly activated by Pseudomonas aeruginosa exoenzyme S -- Epelman et al. (exoenzyme S) was shown to be a potent mitogen for T cells. Exoenzyme S stimulated highly purified monocytes independent of www.jleukbio.org /cgi/content/abstract/71/3/458   (288 words)

Role of the Small GTP-Binding Protein Rho in Epithelial Cell Migration in the Rabbit Cornea -- Nakamura et al. 42 (5): ... Histologic photographs of the extent of epithelial migration in rabbit corneal blocks after incubation for 24 hours in the absence (A) or presence of exoenzyme C3 at concentrations of 1 µg/ml (B), 2 µg/ml (C), or 4 µg/ml (D). Rabbit corneal blocks were cultured for 24 hours in the absence or presence of 2 µM LPA and in the presence of the indicated concentrations of exoenzyme C3. Corneal blocks were cultured for 24 hours in the absence or presence of exoenzyme C3 (2 µg/ml) and in the presence of the indicated concentrations of LPA. www.iovs.org /cgi/content/full/42/5/941   (4232 words)

Rho A regulates sustained smooth muscle contraction through cytoskeletal reorganization of HSP27 -- Wang and Bitar 275 ... Inhibition of Rho A translocation by Clostridium botulinum C3 exoenzyme. Freshly isolated cells were permeabilized with saponin (75 µg/ml) and preincubated either with or without C3 exoenzyme (2 ng/5,000,000 cells) for 20 min. Inhibition of ET-1-induced MAPK phosphorylation by C3 exoenzyme treatment (lanes 8 and 9) is compared with untreated counterparts (lanes 4 and 5). ajpgi.physiology.org /cgi/content/full/275/6/G1454   (6169 words)

Exoenzyme S antibody (ab20031) datasheet   (Site not responding. Last check: 2007-10-30) Pseudomonas aeruginosa produces two extracellular protein toxins, Exoenzyme S and Exotoxin A. Exoenzyme S is probably an exotoxin. It has been suggested that exoenzyme S may act to impair the function of phagocytic cells in the bloodstream and internal organs to prepare for invasion by Ps. Exoenzyme S is a potent stimulus for the proliferation of T cells in greater than 95% of adults, which could contribute to the pathogenesis of Cystic Fibrosis. www.abcam.com /index.html?datasheet=20031&t0=540933-50530427   (316 words)

Pseudomonas aeruginosa Exoenzyme S Induces Transcriptional Expression of Proinflammatory Cytokines and Chemokines ...   (Site not responding. Last check: 2007-10-30) Pseudomonas aeruginosa Exoenzyme S Induces Transcriptional Expression of Proinflammatory Cytokines and Chemokines (2000) 1 Pseudomonas aeruginosa exoenzyme S is a mitogen but not a su.. 1 Elevated exoenzyme expression by Pseudomonas aeruginosa is c.. citeseer.ist.psu.edu /epelman00pseudomonas.html   (593 words)

Activation of FP Prostanoid Receptor Isoforms Leads to Rho-mediated Changes in Cell Morphology and in the Cell ... C3 Exoenzyme Purification-- Escherichia coli transformed with a plasmid encoding a glutathione S-transferase/C3 exoenzyme fusion protein was used for The cells were either not treated (panels a and b) or were pretreated with 40 µg/ml C3 exoenzyme for 48 h (panels c and d). of actin stress fibers that was blocked by the injection of C3 exoenzyme (22). www.jbc.org /cgi/content/full/274/50/35944   (4126 words)

O-Antigen Serotypes and Type III Secretory Toxins in Clinical Isolates of Pseudomonas aeruginosa -- Faure et al. 41 ... Cytotoxic and invasive strains of Pseudomonas aeruginosa are genotypically distinct at the loci encoding exoenzyme S. Infect. Genetic analysis of exoenzyme S expression by Pseudomonas aeruginosa. Contribution of exoenzyme S to the virulence of Pseudomonas aeruginosa. jcm.asm.org /cgi/content/full/41/5/2158   (1860 words)

ADP-Ribosylation of Rho by C3 Ribosyltransferase Inhibits IL-2 Production and Sustained Calcium Influx in Activated T ... C3 exoenzyme partially inhibits Erk activity, but not inductive tyrosine phosphorylation or lck activity. The mean ratio of pooled experiments indicated that the activation-induced increase of lck activity in C3-treated cells was not significantly different from that of mock-treated cells (2.17 ± 0.86 vs 1.21 ± 0.31, n = 4). ADP-ribosylation of rho-proteins with botulinum C3 exoenzyme inhibits invasion and shape changes of T-lymphoma cells. www.jimmunol.org /cgi/content/full/163/7/3819   (5322 words)

Exoenzyme C3 Transferase (CT03) Exoenzyme C3 transferase is an ADP ribosyl transferase that selectively ribosylates Purity is determined by scanning densitometry of protein run on SDS-PAGE gels. A 20 µg sample of CT03 was separated by SDS-PAGE and protein was stained with coomassie blue. www.cytoskeleton.com /products/g-prot/ct03.html   (341 words)

Role of Rho Protein in Lovastatin-Induced Breakdown of Actin Cytoskeleton -- Koch et al. 283 (2): 901 -- Journal of ... exoenzyme C3 decreased in membranes and increased in the cytosol Effects of CNF1 and lovastatin treatment on NIH 3T3 cell morphology and exoenzyme C3 ADP-ribosylation of Rho proteins. Chardin, P., Boquet, P., Madaule, P., Popoff, M. Rubin, E. and Gill, D. The mammalian G protein rhoC is ADP-ribosylated by Clostridium botulinum exoenzyme C3 and affects actin microfilaments in Vero cells. jpet.aspetjournals.org /cgi/content/full/283/2/901   (5234 words)

Expression of Pseudomonas aeruginosa exoS is controlled by quorum sensing and RpoS -- Hogardt et al. 150 (4): 843 -- ... exoenzyme S might not be required to protect P. Yahr, T. and Frank, D. Transcriptional organization of the trans-regulatory locus which controls exoenzyme S synthesis in Pseudomonas aeruginosa. Yahr, T. L., Goranson, J. and Frank, D. Exoenzyme S of Pseudomonas aeruginosa is secreted by a type III pathway. mic.sgmjournals.org /cgi/content/full/150/4/843   (4369 words)

Different Domains of Pseudomonas aeruginosa Exoenzyme S Activate Distinct TLRs -- Epelman et al. 173 (3): 2031 -- The ... Pseudomonas aeruginosa exoenzyme S is a mitogen but not a superantigen for human T lymphocytes. Recombinant Pseudomonas exoenzyme S and exoenzyme S from Pseudomonas aeruginosa strain DG1 share the ability to stimulate T lymphocyte proliferation. Pseudomonas aeruginosa exoenzyme S induces transcriptional expression of pro-inflammatory cytokines and chemokines. www.jimmunol.org /cgi/content/full/173/3/2031   (7346 words)

#143 Exoenzyme C3 MSDS ver. 2/00   (Site not responding. Last check: 2007-10-30) Exoenzyme C3 is a protein of approximately 25,000 daltons that is produced by certain strains of Trace amounts of neurotoxin are destroyed by a heat treatment during production. Exoenzyme C3 is reported to have cytotoxic activity and may cause irritation by inhalation, skin contact, eye contact or injection. www.listlabs.com /MSDS/143.htm   (177 words)

Joan C. Olson, Ph.D. ADP-ribosylation of oncogenic Ras proteins by Pseudomonas aeruginosa exoenzyme S in vivo. Pseudomonas aeruginosa exoenzyme S disrupts Ras-mediated signal tranduction by inhibiting guanine nucleotide exchange factor catalyzed nucleotide exchange. Independent and coordinate effects of the ADP-ribosyltransferase and GTP-ase activating activities of exoenzyme S on HT-29 epitheilial cell function. www.musc.edu /pathology/cvs/olson.htm   (329 words)

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