Resiliency of Stable Isotope Fractionation (δ(13)C and δ(37)Cl) of Trichloroethene to Bacterial Growth Physiology and Expression of Key Enzymes.
Resiliency of Stable Isotope Fractionation (δ(13)C and δ(37)Cl) of Trichloroethene to Bacterial Growth Physiology and Expression of Key Enzymes.
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三氯乙烯稳定同位素分馏(δ(13)C 和 δ(37)Cl)对细菌生长生理学和关键酶表达的弹性
DOI:
10.1021/acs.est.5b02918
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发表时间:
2015
影响因子:
11.4
通讯作者:
S. B. Haderlein
中科院分区:
文献类型:
--
作者:
Buchner;S. Behrens;C. Laskov;S. B. Haderlein
Quantification of in situ (bio)degradation using compound-specific isotope analysis requires a known and constant isotope enrichment factor (ε). Because reported isotope enrichment factors for microbial dehalogenation of chlorinated ethenes vary considerably we studied the potential effects of metabolic adaptation to TCE respiration on isotope fractionation (δ13C and δ37Cl) using a model organism (Desulfitobacterium hafniesneY51), which only has one reductive dehalogenase (PceA). Cells grown on TCE for the first time showed exponential growth until 109cells/mL. During exponential growth, the cell-normalized amount of PceA enzyme increased steadily in the presence of TCE (up to 21pceAtranscripts per cell) but not with alternative substrates (<1pceAtranscript per cell). Cultures initially transferred or subcultivated on TCE showed very similar isotope fractionation, both for carbon (εcarbon: −8.6‰ ± 0.3‰ or −8.8‰ ± 0.2‰) and chlorine (εchlorine: −2.7‰ ± 0.3‰) with little variation (0.7‰) for the different experimental conditions. Thus, TCE isotope fractionation byD. hafniensestrain Y51 was affected by neither growth phase,pceAtranscription, or translation, nor by PceA content per cell, suggesting that transport limitations did not affect isotope fractionation. Previously reported variable ε values for other organohalide-respiring bacteria might thus be attributed to different expression levels of their multiple reductive dehalogenases.
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影响因子:
11.4
作者:
Cretnik, Stefan;Thoreson, Kristen A.;Elsner, Martin
通讯作者:
Elsner, Martin
影响因子:
3.2
作者:
Suyama, A;Yamashita, M;Furukawa, K
通讯作者:
Furukawa, K
影响因子:
5
作者:
Y. Morita;Taiki Futagami;M. Goto;K. Furukawa
通讯作者:
K. Furukawa
影响因子:
5
作者:
Kampara, Makeba;Thullner, Martin;Wick, Lukas Y.
通讯作者:
Wick, Lukas Y.
DOI:
--
发表时间:
2004
期刊:
影响因子:
--
作者:
W. Meier‐Augenstein
通讯作者:
W. Meier‐Augenstein