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Littérature scientifique sur le sujet « Wzb phosphatase »

Auteur : Grafiati
Publié le 14 mars 2023

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Articles de revues sur le sujet "Wzb phosphatase"

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Reid, Anne N., and Chris Whitfield. "Functional Analysis of Conserved Gene Products Involved in Assembly of Escherichia coli Capsules and Exopolysaccharides: Evidence for Molecular Recognition between Wza and Wzc for Colanic Acid Biosynthesis." Journal of Bacteriology 187, no. 15 (2005): 5470–81. http://dx.doi.org/10.1128/jb.187.15.5470-5481.2005.

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ABSTRACT Group 1 capsular polysaccharides (CPSs) of Escherichia coli and some loosely cell-associated exopolysaccharides (EPSs), such as colanic acid, are assembled by a Wzy-dependent polymerization system. In this biosynthesis pathway, Wza, Wzb, and Wzc homologues are required for surface expression of wild-type CPS or EPS. Multimeric complexes of Wza in the outer membrane are believed to provide a channel for polymer export; Wzc is an inner membrane tyrosine autokinase and Wzb is its cognate phosphatase. This study was performed to determine whether the Wza, Wzb, and Wzc proteins for colanic
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Vincent, Carole, Patricia Doublet, Christophe Grangeasse, Elisabeth Vaganay, Alain J. Cozzone, and Bertrand Duclos. "Cells of Escherichia coli Contain a Protein-Tyrosine Kinase, Wzc, and a Phosphotyrosine-Protein Phosphatase, Wzb." Journal of Bacteriology 181, no. 11 (1999): 3472–77. http://dx.doi.org/10.1128/jb.181.11.3472-3477.1999.

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ABSTRACT Two proteins of Escherichia coli, termed Wzc and Wzb, were analyzed for their capacity to participate in the reversible phosphorylation of proteins on tyrosine. First, Wzc was overproduced from its specific gene and purified to homogeneity by affinity chromatography. Upon incubation in the presence of radioactive ATP, it was found to effectively autophosphorylate. Two-dimensional analysis of its phosphoamino acid content revealed that it was modified exclusively at tyrosine. Second, Wzb was also overproduced from the corresponding gene and purified to homogeneity by affinity chromatog
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Nakar, David, and David L. Gutnick. "Involvement of a Protein Tyrosine Kinase in Production of the Polymeric Bioemulsifier Emulsan from the Oil-Degrading Strain Acinetobacter lwoffii RAG-1." Journal of Bacteriology 185, no. 3 (2003): 1001–9. http://dx.doi.org/10.1128/jb.185.3.1001-1009.2003.

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ABSTRACT The genes associated with the biosynthesis of the polymeric bioemulsifier emulsan, produced by the oil-degrading Acinetobacter lwoffii RAG-1 are clustered within a 27-kbp region termed the wee cluster. This report demonstrates the involvement of two genes of the wee cluster of RAG-1, wzb and wzc, in emulsan biosynthesis. The two gene products, Wzc and Wzb were overexpressed and purified. Wzc exhibited ATP-dependent autophosphorylating protein tyrosine kinase activity. Wzb was found to be a protein tyrosine phosphatase capable of dephosphorylating the phosphorylated Wzc. Using the synt
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Rosche, Thomas M., Ben Smith, and James D. Oliver. "Evidence for an Intermediate Colony Morphology of Vibrio vulnificus." Applied and Environmental Microbiology 72, no. 6 (2006): 4356–59. http://dx.doi.org/10.1128/aem.02937-05.

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ABSTRACT Vibrio vulnificus causes both food-borne disease and wound infections. Most V. vulnificus strains express capsular polysaccharide (CPS), which is required for the virulence of this organism. Under standard growth conditions, CPS expression is lost at a relatively high frequency (10−3 to 10−4), resulting in a switch from an opaque (Op, CPS+) colony morphology to a translucent (Tr, CPS−) colony morphology. The wzb gene, which encodes a phosphatase required for CPS expression, has been proposed to be involved in this switch through a site-specific deletion of the entire gene. In an exami
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LaPointe, Gisele, Daniele Atlan, and Christophe Gilbert. "Characterization and site-directed mutagenesis of Wzb, an O-phosphatase from Lactobacillus rhamnosus." BMC Biochemistry 9, no. 1 (2008): 10. http://dx.doi.org/10.1186/1471-2091-9-10.

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Tiwari, Monalisa, Shruti Panwar, Akansha Kothidar, and Vishvanath Tiwari. "Rational targeting of Wzb phosphatase and Wzc kinase interaction inhibits extracellular polysaccharides synthesis and biofilm formation in Acinetobacter baumannii." Carbohydrate Research 492 (June 2020): 108025. http://dx.doi.org/10.1016/j.carres.2020.108025.

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Govarthanan, Muthusamy, Jung-Hee Park, Loganathan Praburaman, et al. "Relative Expression of Low Molecular Weight Protein, Tyrosine Phosphatase (Wzb Gene) of Herbaspirillum sp. GW103 Toward Arsenic Stress and Molecular Modeling." Current Microbiology 71, no. 3 (2015): 311–16. http://dx.doi.org/10.1007/s00284-015-0850-6.

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Klumpp, Susanne, Jan Hermesmeier, Dagmar Selke, Ralf Baumeister, Roland Kellner, and Josef Krieglstein. "Protein Histidine Phosphatase: A Novel Enzyme with Potency for Neuronal Signaling." Journal of Cerebral Blood Flow & Metabolism 22, no. 12 (2002): 1420–24. http://dx.doi.org/10.1097/01.wcb.0000045041.03034.99.

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The importance of reversible phosphorylation for neuronal signaling and cell survival is well recognized. Knowledge in vertebrates, however, is so far limited to O-phosphates from serine, threonine, and tyrosine. The authors describe an enzyme acting on N-phosphates. It is the first protein histidine phosphatase identified in vertebrates. This histidine phosphatase is ubiquitously expressed in mammalian tissues including brain. Characterization and sequencing showed a yet unknown protein with no similarity to other phosphatases. In Caenorhabditis elegans, the homolog of this histidine phosphat
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Pettis, Gregg S., and Aheli S. Mukerji. "Structure, Function, and Regulation of the Essential Virulence Factor Capsular Polysaccharide of Vibrio vulnificus." International Journal of Molecular Sciences 21, no. 9 (2020): 3259. http://dx.doi.org/10.3390/ijms21093259.

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Vibrio vulnificus populates coastal waters around the world, where it exists freely or becomes concentrated in filter feeding mollusks. It also causes rapid and life-threatening sepsis and wound infections in humans. Of its many virulence factors, it is the V. vulnificus capsule, composed of capsular polysaccharide (CPS), that plays a critical role in evasion of the host innate immune system by conferring antiphagocytic ability and resistance to complement-mediated killing. CPS may also provoke a portion of the host inflammatory cytokine response to this bacterium. CPS production is biochemica
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Cefalo, Angela D., Jeffery R. Broadbent, and Dennis L. Welker. "The Streptococcus thermophilus protein Wzh functions as a phosphotyrosine phosphatase." Canadian Journal of Microbiology 59, no. 6 (2013): 391–98. http://dx.doi.org/10.1139/cjm-2013-0094.

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Amino acid residues that are important for metal binding and catalysis in Gram-positive phosphotyrosine phosphatases were identified in the Wzh protein of Streptococcus thermophilus MR-1C by using sequence comparisons. A His-tagged fusion Wzh protein was purified from Escherichia coli cultures and tested for phosphatase activity against synthetic phosphotyrosine and phosphoserine–threonine peptides. Purified Wzh released 2316.5 ± 138.7 pmol PO4·min−1·μg−1 from phosphotyrosine peptide-1 and 2345.7 ± 135.2 pmol PO4·min−1·μg−1 from phosphotyrosine peptide-2. The presence of the phosphotyrosine ph
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Thèses sur le sujet "Wzb phosphatase"

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Iodice, Domenico. "Construction and characterization of probiotic Lactobacillus rhamnosus GG deletion mutant for extracellular polysaccharide (EPS) biosynthesis regulator." Doctoral thesis, Università di Siena, 2018. http://hdl.handle.net/11365/1037713.

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Lactobacillus rhamnosus GG ATCC 53103 (LGG) is a probiotic microorganism producing a galactose-rich exopolysaccharide (EPS) surrounding the cell wall involved in adhesion and biofilm formation. The EPS gene cluster is composed by 16 genes associated to EPS biosynthesis. The wzb gene is an ortholog of the Streptococcus pneumoniae cpsB, encoding a protein phosphatase involved in the regulation of capsule production. In order to study the role of wzb gene in EPS biosynthesis, a L. rhamnosus GG wzb deletion mutant was constructed. Deletion of wzb produced a 12 minutes reduction of duplicati
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Huang, Yu-Chie, and 黃愈志. "Structural Studies of Human RNase 7 and Klebsiella pneumoniae Phosphatase Wzb." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/51053237025758269998.

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博士<br>國立臺灣大學<br>生化科學研究所<br>97<br>Chapter 1 Ribonucleases are found widely within living organisms and are thought to play important roles in RNA metabolism, angiogenesis, neurotoxicity, antitumor and antimicrobial activity. In human ribonucleases, antimicrobial activity was found in RNase 3, RNase 5 and RNase 7. The mechanisms of antimicrobial activities remain unclear although they possess similar properties, e.g., high isoelectric point and net positive charge. It is therefore interesting to investigate whether the positively charged residues or epitopes are responsible for the bactericidal
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Hong-TsunChang and 張宏存. "iPhos: a web tool to streamline the alkaline phosphatase-assisted LC-MS phosphoproteome investigation." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/7n3cf5.

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碩士<br>國立成功大學<br>電機工程學系<br>103<br>iPhos is a web based software toolkit to facilitate and streamline the work-flow of the alkaline phosphatase-assisted phosphoproteome characterization. Comprehensive characterization of the phosphoproteome in living cells is critical in signal transduction research. But the low abundance of phosphopeptides among the total proteome in cells remains a challenge in mass spectrometry-based proteomic analysis. To overcome the obstacles, an alternative analytic strategy to confidently identify phosphorylated peptides by using the alkaline phosphatase (AP) treatment i
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Chao, Ti-chun, and 趙悌均. "PSTPIP2, Proline-Serine-Threonine Phosphatase Interacting Protein 2, a Host Membrane-Deforming Protein, is Critical for Membranous Web Formation in Hepatitis C Virus Replication." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/06552578558701366866.

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Islam, Salim Timo. "Structural and Functional Characterization of O-Antigen Translocation and Polymerization in Pseudomonas aeruginosa PAO1." Thesis, 2013. http://hdl.handle.net/10214/7239.

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Heteropolymeric O antigen (O-Ag)-capped lipopolysaccharide is the principal constituent of the Gram-negative bacterial cell surface. It is assembled via the integral inner membrane (IM) Wzx/Wzy-dependent pathway. In Pseudomonas aeruginosa, Wzx translocates lipid-linked anionic O-Ag subunits from the cytoplasmic to the periplasmic leaflets of the IM, where Wzy polymerizes the subunits to lengths regulated by Wzz1/2. The Wzx and Wzy IM topologies were mapped using random C-terminal-truncation fusions to PhoALacZα, which displays PhoA/LacZ activity dependent upon its subcellular localization.
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Livres sur le sujet "Wzb phosphatase"

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Kirchman, David L. Degradation of organic matter. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780198789406.003.0007.

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The aerobic oxidation of organic material by microbes is the focus of this chapter. Microbes account for about 50% of primary production in the biosphere, but they probably account for more than 50% of organic material oxidization and respiration (oxygen use). The traditional role of microbes is to degrade organic material and to release plant nutrients such as phosphate and ammonium as well as carbon dioxide. Microbes are responsible for more than half of soil respiration, while size fractionation experiments show that bacteria are also responsible for about half of respiration in aquatic hab
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Chapitres de livres sur le sujet "Wzb phosphatase"

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Sharma, Sunita. "Biosynthesis of the Immunomodulatory Molecule Capsular Polysaccharide A from Bacteroides fragilis." In Biosynthesis [Working Title]. IntechOpen, 2021. http://dx.doi.org/10.5772/intechopen.96937.

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Capsular Polysaccharide A (CPSA) is a polymer of a tetrasaccharide unit found on the surface of the symbiotic gut bacteria Bacteroides fragilis. CPSA has been suggested to be important for maintaining a natural equilibrium between Th1 and Th2 cell levels in the normal immune system of mammals. If this equilibrium is disrupted, the human body can develop different autoimmune disorders. The gene locus responsible for CPSA biosynthesis has been previously identified. The locus was proposed to encode one glycosyl-1-phosphate transferase (WcfS) and three glycosyltransferases (WcfN, -P and -Q), three sugar modifying enzymes (WcfM, WcfR and WcfO), a flippase (Wzx) and a polysaccharide polymerase (Wzy) based on homology tools. A route for the complete biosynthesis of CPSA has been elucidated. The initiating sugar transferase, WcfS has been previously identified and characterized. An in vitro method was used to enzymatically synthesize CPSA, which was assembled on a fluorescent analogue of the native bactoprenyl diphosphate anchor one sugar at a time. Function of the hypothesized pyruvyltransferase WcfO was also determined. This is the first study to characterize a pyruvyltransferase involved in polysaccharide biosynthesis from a prokaryote. The biosynthesis of the polysaccharide was achieved in a single pot, compared to multiple steps involved in chemical synthesis, displaying an enormous leap in the biosynthesis of complex molecules like CPSA.
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Actes de conférences sur le sujet "Wzb phosphatase"

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Nishi, Toshihiro, Kazunori Naganuma, Yoshihisa Sakai, Masao Asobe, and Shoichi Sudo. "Amplification characteristics of femtosecond optical pulses in short, Er3+-doped phosphate fibers." In OSA Annual Meeting. Optica Publishing Group, 1993. http://dx.doi.org/10.1364/oam.1993.wb.1.

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Xia, Da-Hai, Chengcheng Pan, Shi-Zhe Song, Wei-Xian Jin, Wen-Bin Hu, and Bao-Min Fan. "Covalent surface modification of 2024 aluminum alloy surface by self-assembly dodecyl phosphate film towards corrosion protection." In 1st Corrosion and Materials Degradation Web Conference. MDPI, 2021. http://dx.doi.org/10.3390/cmdwc2021-10040.

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DAGDAG, Omar, Zaki Safi, Lei Guo, Hamid Erramli, and Mustapha El Gouri. "Assessment of the anticorrosive efficiency of zinc phosphate (ZP) and epoxy resin (DGEBA-DAA) based composite (DGEBA-DAA-ZP) for electrolytic cadmium pre-treated 15CDV6 steel in 3wt% NaCl medium: experimental and computational studies." In 1st Corrosion and Materials Degradation Web Conference. MDPI, 2021. http://dx.doi.org/10.3390/cmdwc2021-09984.

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