2000
Dehalogenation of haloalkanes by Mycobacterium tuberculosis H37Rv and other mycobacteria
JESENSKÁ, Andrea, Ivo SEDLÁČEK a Jiří DAMBORSKÝZákladní údaje
Originální název
Dehalogenation of haloalkanes by Mycobacterium tuberculosis H37Rv and other mycobacteria
Autoři
JESENSKÁ, Andrea (203 Česká republika), Ivo SEDLÁČEK (203 Česká republika) a Jiří DAMBORSKÝ (203 Česká republika)
Vydání
Applied and Environmental Microbiology, 2000, 0099-2240
Další údaje
Jazyk
angličtina
Typ výsledku
Článek v odborném periodiku
Obor
10600 1.6 Biological sciences
Stát vydavatele
Spojené státy
Utajení
není předmětem státního či obchodního tajemství
Odkazy
Impakt faktor
Impact factor: 3.389
Kód RIV
RIV/00216224:14310/00:00001628
Organizační jednotka
Přírodovědecká fakulta
UT WoS
000084585800033
Klíčová slova anglicky
holoalkane dehalogenases
Změněno: 31. 3. 2010 12:02, prof. RNDr. Ivo Sedláček, CSc.
Anotace
V originále
Haloalkane dehalogenases convert haloalkanes to their corresponding alcohols by a hydrolytic mechanism. To date various haloalkane dehalogenases have been isolated from bacteria colonizing environments that are contaminated with halogenated compounds. A search in current databases with the sequences of these known haloalkane dehalogenases revealed the presence of three different genes encoding putative haloalkane dehalogenases in the genome of the human parasite Mycobacterium tuberculosis strain H37Rv. The ability of M. tuberculosis and several other mycobacterial strains to dehalogenate haloaliphatic compounds was therefore studied. Intact cells of M. tuberculosis H37Rv were found to dehalogenate 1-chlorobutane, 1-chlorodecane, 1-bromobutane and 1,2-dibromoethane. Nine isolates of mycobacteria from clinical material and four strains from a collection of microorganisms were found to be capable of dehalogenating 1,2-dibromoethane. Crude extracts prepared from two of these strains, M. avium MU1 and M. smegmatis CCM 4622, showed broad substrate specificity towards a number of halogenated substrates. Dehalogenase activity in the absence of oxygen and the identification of primary alcohols as the products of the reaction suggest a hydrolytic dehalogenation mechanism. The presence of dehalogenases in bacterial isolates from clinical material including the species colonising both animal tissues and free environment indicates possible role of parasitic microorganisms in distribution of degradation genes in the environment.
Návaznosti
GA203/97/P149, projekt VaV |
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ME 276, projekt VaV |
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MSM 143100005, záměr |
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