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Topic: Haloalkane

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	Haloalkane Summary
		A haloalkane, also known as alkyl halogenide, halogenalkane or halogenoalkane, and alkyl halide is a chemical compound derived from an alkane by substituting one or more hydrogen atoms with halogen atoms.
		Haloalkanes are used in semiconductor device fabrication, as refrigerants, foam blowing agents, solvents, aerosol spray propellants, fire extinguishing agents, and chemical reagents.
		Halon is the group of haloalkanes with bromine as well as chlorine or fluorine groups.
	www.bookrags.com /Haloalkane (7208 words)

	Haloalkane - Information at Halfvalue.com (Site not responding. Last check: 2007-10-26)
		A haloalkane, also known as alkyl halogenide, halogenalkane or halogenoalkane, and alkyl halide is a chemical compound derived from an alkane by substituting one or more hydrogen atoms with halogen atoms.
		Haloalkanes are used in semiconductor device fabrication, as refrigerants, foam blowing agents, solvents, aerosol spray propellants, fire extinguishing agents, and chemical reagents.
		Haloalkanes in copper tubing open to the environment can turn into phosgene gas after coming in contact with extreme heat, such as while brazing or in a fire situation.
	www.halfvalue.com /wiki.jsp?topic=Haloalkane (4194 words)

	Haloalkane-Utilizing Rhodococcus Strains Isolated from Geographically Distinct Locations Possess a Highly Conserved ...
		Haloalkane degradation and assimilation by Rhodococcus rhodochrous NCIMB 13064.
		The plasmid-located haloalkane dehalogenase gene from Rhodococcus rhodochrous NCIMB13064.
		Microbial dehalogenation of haloalkanes mediated by oxygenase or halidohydrolase.
	jb.asm.org /cgi/content/full/182/10/2725 (4847 words)

	ScienceDaily: Haloalkane (Site not responding. Last check: 2007-10-26)
		The haloalkanes (also known as Halogenoalkanes) are a group of chemical compounds, consisting of alkanes, such as methane or ethane, with one or more halogens linked, such as chlorine or fluorine, making them a type of organic halide.
		Ozone Recovering, But Unlikely To Stabilize At Pre-1980 Levels, Says Study (May 4, 2006) -- While Earth's ozone layer is slowly being replenished following an international 1987 agreement banning CFCs, the recovery is occurring in a changing atmosphere and is unlikely to stabilize at...
		Haloalkane -- The haloalkanes (also known as Halogenoalkanes) are a group of chemical compounds, consisting of alkanes, such as methane or ethane, with one or more halogens linked, such as chlorine or fluorine,...
	www.sciencedaily.com /encyclopedia/Haloalkane (1474 words)

	Protein Modeling of Haloalkane Dehalogenase
		The protein chosen is haloalkane dehalogenase (whose PDB ID is 1K6E) and the hetero compound that are complexed within this protein is 1,2-propanediol (whose HET abbreviation is PGO).
		Haloalkane dehalogenase is the enzyme which is capable of hydrolyzing the bond between carbon and halogen in haloalkanes or halocarboxylic acids to produce corresponding alcohols.
		Certain haloalkanes, such as ethylchloride, methylchloride, and 1,2-dichloroethane are considered pollutants of the environment.
	mason.gmu.edu /~mnguyena/projects/protein/1-2-propanediol.htm (1683 words)

	Haloalkane information - Search.com
		A haloalkane, also known as alkyl halogenide, halogenalkane or halogenoalkane, and alkyl halide is a chemical compound derived from an alkane by substituting one or more hydrogen atoms with halogen atoms.
		Haloalkanes are used in semiconductor device fabrication, as refrigerants, foam blowing agents, solvents, aerosol spray propellants, fire extinguishing agents, and chemical reagents.
		Halon is the group of haloalkanes with bromine as well as chlorine or fluorine groups.
	domainhelp.search.com /reference/Haloalkane (3656 words)

	Genetic Adaptation of Bacteria to Halogenated Aliphatic Compounds
		The haloalkane dehalogenase gene (dhlA) and the chloroacetaldehyde dehydrogenase are plasmid encoded (6).
		Haloalkane dehalogenase is a soluble 35-kDa, 310-amino acid protein that hydrolytically cleaves carbon-chlorine bonds to produce alcohols.
		The origins of the plasmid-encoded haloalkane dehalogenase and chloroacetaldehyde dehydrogenase are unknown.
	www.ehponline.org /members/1995/Suppl-5/janssen-full.html (2988 words)

	EVOLUTION OF HALOALKANE DEHALOGENASE PROTEIN FAMILY
		In this study, we have used phylogenetic approach to assess the origin and evolution of haloalkane dehalogenases.
		Knowledge of the evolutionary history of haloalkane dehalogenases and related protein families should provide basis to understand the evolution of enzymatic activities and structure‑function relationships.
		Sequences from the cluster of haloalkane dehalogenases were aligned and used for phylogenetic reconstructions by maximum‑likelihood [3] and neighbor‑joining [4] methods.
	www.xray.cz /setkani/abst2006/chovancova.htm (441 words)

	Haloalkane at AllExperts
		A haloalkane, also known as alkyl halogenide, halogenalkane or halogenoalkane, and alkyl halide is a chemical compound derived from an alkane by substituting one or more hydrogen atoms with halogen atoms.
		Haloalkanes are used in semiconductor device fabrication, as refrigerants, foam blowing agents, solvents, aerosol spray propellants, fire extinguishing agents, and chemical reagents.
		Halon is the group of haloalkanes with bromine as well as chlorine or fluorine groups.
	en.allexperts.com /e/h/ha/haloalkane.htm (3641 words)

	Continuous process for manufacturing halogenated compounds - Patent 6187978
		The process of claim 1, wherein the haloalkane is selected from the group consisting of carbon tetrachloride, 1,1,1-trichloroethane, dichlorofluoromethane, 1,1,1-trichlorotrifluoroethane, 1,1,2-trichlorotrifluoroethane, tetrachloroethane, pentachloroethane, and hexachloroethane; and wherein the haloalkene is selected from the group consisting of vinyl chloride, 1,1-dichloroethene, trichloroethene, tetrachloroethene, chlorofluoroethene, 1,2-dichloroethene, 1,1-dichloro-difluoroethene, 1-chloro-1-propene, and 1-chloro-1-butene.
		The process of claim 13, wherein the haloalkane is selected from the group consisting of carbon tetrachloride, 1,1,1-trichloroethane, and 1,1,1-trichlorotrifluoroethane; and wherein the haloalkene is selected from the group consisting of 1,1-dichlorodifluoroethene, 1,1-dichloroethene, and vinyl chloride.
		To this end, the catalyst may be added to the reactor containing the haloalkane, haloalkene and organic ligand, or the haloalkane and haloalkene may be added to a reactor containing the catalyst and organic ligand.
	www.freepatentsonline.com /6187978.html (3951 words)

	Haloalkane Dehalogenase Mechanism: JPC 2003
		Comparison of reaction energetics and leaving group interactions during the enzyme-catalyzed and uncatalyzed displacement of chloride from haloalkanes.
		2 displacement of chloride from haloalkanes methyl chloride and 1,2-dichloroethane by a series of carboxylate nucleophiles is characterized using ab initio calculations.
		A similar reaction is catalyzed by the enzyme haloalkane dehalogenase with activation barrier of 15.3 kcal/mol (64.0 kJ/mol).
	www.chem.ucsb.edu /~kalju/halo2.html (234 words)

	Halide-Stabilizing Residues of Haloalkane Dehalogenases Studied by Quantum Mechanic Calculations and Site-Directed ...
		Haloalkane dehalogenases catalyze cleavage of the carbon-halogen bond in halogenated aliphatic compounds, resulting in the formation of an alcohol, a halide, and a proton as the reaction products.
		Three structural features of haloalkane dehalogenases are essential for their catalytic performance: (i) a catalytic triad, (ii) an oxyanion hole, and (iii) the halide-stabilizing residues.
		The differences in the halide stabilizing residues of three haloalkane dehalogenases are discussed in the light of molecular adaptation of these enzymes to their substrates.
	pubs.acs.org /cgi-bin/abstract.cgi/bichaw/2002/41/i48/abs/bi026427v.html (338 words)

	EC 3.8.1.5 - Haloalkane dehalogenase.
		Re-refinement of the structure of hydrolytic haloalkane dehalogenase linb from sphingomonas paucimobilis ut26 at 1.6 a resolution
		Complex of hydrolytic haloalkane dehalogenase linb from sphingomonas paucimobilis with ut26 2-bromo-2-propene-1-ol at 1.8a resolution
		Haloalkane dehalogenase complexed with 1,2-dichloroethane (soaked in 10mm dce at ph 5.0 and at 4 degrees celsius)
	www.ebi.ac.uk /thornton-srv/databases/cgi-bin/enzymes/GetPage.pl?ec_number=3.8.1.5 (301 words)

	Functionally relevant motions of haloalkane dehalogenases occur in the specificity-modulating cap domains -- Otyepka ...
		the consequence of the modular composition of haloalkane dehalogenases.
		Refined X-ray structures of haloalkane dehalogenase at pH 6.2 and pH 8.2 and implications for the reaction mechanism.
		Degradation of {beta}-Hexachlorocyclohexane by Haloalkane Dehalogenase LinB from Sphingomonas paucimobilis UT26
	www.proteinscience.org /cgi/content/full/11/5/1206 (5592 words)

	Biodegradation of 1,2,3-Trichloropropane through Directed Evolution and Heterologous Expression of a Haloalkane ...
		on TCP of the haloalkane dehalogenase from Rhodococcus sp.
		The plasmid-located haloalkane dehalogenase gene from Rhodococcus rhodochrous NCIMB 13064.
		Refined X-ray structures of haloalkane dehalogenase at pH 6.2 and pH 8.2 and implications for the reaction mechanism.
	aem.asm.org /cgi/content/full/68/7/3582 (3942 words)

	Haloalkane-Utilizing Rhodococcus Strains Isolated from Geographically Distinct Locations Possess a Highly Conserved ...
		The genetic organization of the dhaA gene region in each of the haloalkane degraders was examined by hybridization analysis and DNA sequencing.
		Southern hybridization analysis with a dhaA gene probe suggested that all haloalkane degraders carry the dhaA gene region both on the chromosome and on a plasmid (70 to 100 kb).
		The data suggest that the haloalkane dehalogenase gene regions of these gram-positive haloalkane-utilizing bacteria are composed of a single catabolic gene cluster that was recently distributed worldwide.
	gbb.eldoc.ub.rug.nl /root/JanssenDB/2000/JBacterPoelarends2 (246 words)

	Scientific Commons: Cloning, Biochemical Properties, and Distribution of Mycobacterial Haloalkane Dehalogenases, ...
		Haloalkane dehalogenases are enzymes that catalyze the cleavage of the carbon-halogen bond by a hydrolytic mechanism.
		Mycobacteria are currently the only genus known to carry more than one haloalkane dehalogenase gene, although putative haloalkane dehalogenases can be inferred in more then 20 different bacterial species by comparative genomics.
		The evolution and distribution of haloalkane dehalogenases among mycobacteria is discussed.
	en.scientificcommons.org /19502755 (278 words)

	Untitled Document
		Haloalkane Dehalogenase (E.C.3.8.1.5) Complexed With 1,2-Dichloroethane (Soaked In 10mm Dce At Ph 5.
		Haloalkane Dehalogenase (E.C.3.8.1.5) Complex With Chloride At Ph 6.2
		Haloalkane Dehalogenase (E.C.3.8.1.5) Complex With Chloride At Ph 8
	www.led.uni-stuttgart.de /hfam49.html (199 words)

	Untitled Document
		Alignment [ annotated clustalW ] Tree [ rooted ]
		haloalkane dehalogenase [imported] - Agrobacterium tumefaciens (strain C58, Dupont) plasmid Ti Agrobacterium tumefaciens C58
		Re-Refinement Of The Structure Of Hydrolytic Haloalkane Dehalogenase Linb From Sphingomonas Paucimob
	www.led.uni-stuttgart.de /hfam54.html (399 words)

	Haloalkane-Utilizing Rhodococcus Strains Isolated from Geographically Distinct Locations Possess a Highly Conserved ...
		Jesenska, A., Pavlova, M., Strouhal, M., Chaloupkova, R., Tesinska, I., Monincova, M., Prokop, Z., Bartos, M., Pavlik, I., Rychlik, I., Mobius, P., Nagata, Y., Damborsky, J. Cloning, Biochemical Properties, and Distribution of Mycobacterial Haloalkane Dehalogenases.
		Jesenska, A., Bartos, M., Czernekova, V., Rychlik, I., Pavlik, I., Damborsky, J. Cloning and Expression of the Haloalkane Dehalogenase Gene dhmA from Mycobacterium avium N85 and Preliminary Characterization of DhmA.
		Otyepka, M., Damborsky, J. Functionally relevant motions of haloalkane dehalogenases occur in the specificity-modulating cap domains.
	jb.asm.org /cgi/content/abstract/182/10/2725 (572 words)

	Modification of Activity and Specificity of Haloalkane Dehalogenase from Sphingomonas paucimobilis UT26 by Engineering ...
		Haloalkane dehalogenases are microbial enzymes acting on haloorganic
		Haloalkane dehalogenase LinB (25) is the enzyme isolated from
		The haloalkane dehalogenases are enzymes with broad substrate
	www.jbc.org /cgi/content/full/278/52/52622 (4237 words)

	The plasmid-located haloalkane dehalogenase gene from Rhodococcus rhodochrous NCIMB 13064 -- Kulakova et al. 143 (1): ...
		The plasmid-located haloalkane dehalogenase gene from Rhodococcus rhodochrous NCIMB 13064 -- Kulakova et al.
		The plasmid-located haloalkane dehalogenase gene from Rhodococcus rhodochrous NCIMB 13064
		The haloalkane dehalogenase (dhaA) gene from Rhodococcus rhodochrous NCIMB
	mic.sgmjournals.org /cgi/content/abstract/143/1/109 (707 words)

	Haloalkane Dehalogenase: PNAS 2000
		The importance of reactant positioning in enzyme catalysis: A hybrid quantum mechanics/molecular mechanics study of a haloalkane dehalogenase
		The activation barrier for nucleophilic attack of acetate on DCE depends greatly on the reactants having a geometry resembling that in the enzyme or an optimized gas-phase structure.
		The modest lowering of the activation barrier by the enzyme relative to the reaction in the gas phase is consistent with mutation experiments.
	www.chem.ucsb.edu /~kalju/halo.html (185 words)

	Catalytic Mechanism of the Haloalkane Dehalogenase LinB from Sphingomonas paucimobilis UT26 -- Prokop et al. 278 (46): ...
		Catalytic Mechanism of the Haloalkane Dehalogenase LinB from Sphingomonas paucimobilis UT26 -- Prokop et al.
		Haloalkane dehalogenases are bacterial enzymes capable of carbon-halogen
		LinB from Sphingomonas paucimobilis UT26 (11) and the haloalkane
	www.jbc.org /cgi/content/full/278/46/45094 (4367 words)

	Crystal Structure of the Haloalkane Dehalogenase from Sphingomonas paucimobilis UT26,
		The haloalkane dehalogenase from Sphingomonas paucimobilis UT26 (LinB) is the enzyme involved in the degradation of the important environmental pollutant
		The LinB structure was compared with the structures of haloalkane dehalogenase from Xanthobacter autotrophicus GJ10 and from Rhodococcus sp.
		This is the major determinant of the substrate specificity of this haloalkane dehalogenase.
	pubs.acs.org /cgi-bin/abstract.cgi/bichaw/2000/39/i46/abs/bi001539c.html (192 words)

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