Abstract:
:Thiocyanate hydrolase is a newly found enzyme from Thiobacillus thioparus THI 115 that converts thiocyanate to carbonyl sulfide and ammonia (Y. Katayama, Y. Narahara, Y. Inoue, F. Amano, T. Kanagawa, and H. Kuraishi, J. Biol. Chem. 267:9170-9175, 1992). We have cloned and sequenced the scn genes that encode the three subunits of the enzyme. The scnB, scnA, and scnC genes, arrayed in this order, contained open reading frames encoding sequences of 157, 126, and 243 amino acid residues, respectively, for the beta, alpha, and gamma subunits, respectively. Each open reading frame was preceded by a typical Shine-Dalgarno sequence. The deduced amino-terminal peptide sequences for the three subunits were in fair agreement with the chemically determined sequences. The protein molecular mass calculated for each subunit was compatible with that determined by sodium dodecyl sulfate-polyacrylamide gel electrophoresis. From a computer analysis, thiocyanate hydrolase showed significant homologies to bacterial nitrile hydratases known to convert nitrile to the corresponding amide, which is further hydrolyzed by amidase to form acid and ammonia. The two enzymes were homologous over regions corresponding to almost the entire coding regions of the genes: the beta and alpha subunits of thiocyanate hydrolase were homologous to the amino- and carboxyl-terminal halves of the beta subunit of nitrile hydratase, and the gamma subunit of thiocyanate hydrolase was homologous to the alpha subunit of nitrile hydratase. Comparisons of the catalytic properties of the two homologous enzymes support the model for the reaction steps of thiocyanate hydrolase that was previously presented on the basis of biochemical analyses.
journal_name
J Bacterioljournal_title
Journal of bacteriologyauthors
Katayama Y,Matsushita Y,Kaneko M,Kondo M,Mizuno T,Nyunoya Hdoi
10.1128/JB.180.10.2583-2589.1998subject
Has Abstractpub_date
1998-05-01 00:00:00pages
2583-9issue
10eissn
0021-9193issn
1098-5530journal_volume
180pub_type
杂志文章abstract::We isolated five new temperature-sensitive alleles of the essential cell division gene ftsZ in Escherichia coli, using P1-mediated, localized mutagenesis. The five resulting single amino acid changes (Gly109-->Ser109 for ftsZ6460, Ala129-->Thr129 for ftsZ972, Val157-->Met157 for ftsZ2066, Pro203-->Leu203 for ftsZ9124,...
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更新日期:1988-08-01 00:00:00
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journal_title:Journal of bacteriology
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doi:10.1128/jb.179.8.2534-2539.1997
更新日期:1997-04-01 00:00:00
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更新日期:1986-09-01 00:00:00
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journal_title:Journal of bacteriology
pub_type: 杂志文章
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更新日期:2013-07-01 00:00:00
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pub_type: 杂志文章
doi:10.1128/jb.185.5.1534-1542.2003
更新日期:2003-03-01 00:00:00
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pub_type: 杂志文章
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更新日期:2007-12-01 00:00:00
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journal_title:Journal of bacteriology
pub_type: 杂志文章
doi:10.1128/JB.188.9.3357-3364.2006
更新日期:2006-05-01 00:00:00
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journal_title:Journal of bacteriology
pub_type: 杂志文章
doi:10.1128/JB.183.1.139-144.2001
更新日期:2001-01-01 00:00:00
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journal_title:Journal of bacteriology
pub_type: 杂志文章
doi:10.1128/JB.116.2.562-570.1973
更新日期:1973-11-01 00:00:00
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pub_type: 杂志文章
doi:10.1128/JB.100.1.512-521.1969
更新日期:1969-10-01 00:00:00
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journal_title:Journal of bacteriology
pub_type: 杂志文章
doi:10.1128/JB.114.2.469-473.1973
更新日期:1973-05-01 00:00:00
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journal_title:Journal of bacteriology
pub_type: 杂志文章
doi:10.1128/jb.176.18.5639-5647.1994
更新日期:1994-09-01 00:00:00
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journal_title:Journal of bacteriology
pub_type: 杂志文章
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更新日期:2001-10-01 00:00:00
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pub_type: 杂志文章
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更新日期:1983-09-01 00:00:00
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更新日期:2004-11-01 00:00:00
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journal_title:Journal of bacteriology
pub_type: 杂志文章
doi:10.1128/JB.108.2.910-915.1971
更新日期:1971-11-01 00:00:00
abstract::Pizer, Lewis I. (University of Pennsylvania, Philadelphia). Glycine synthesis and metabolism in Escherichia coli. J. Bacteriol. 89:1145-1150. 1965.-A correlation was demonstrated between a nutritional requirement that can only be satisfied by glycine and the absence of the enzymatic capacity to interconvert l-serine a...
journal_title:Journal of bacteriology
pub_type: 杂志文章
doi:10.1128/JB.89.4.1145-1150.1965
更新日期:1965-04-01 00:00:00
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journal_title:Journal of bacteriology
pub_type: 杂志文章
doi:10.1128/jb.177.2.320-325.1995
更新日期:1995-01-01 00:00:00
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journal_title:Journal of bacteriology
pub_type: 杂志文章
doi:10.1128/JB.180.2.231-235.1998
更新日期:1998-01-01 00:00:00
abstract::The response of Neurospora to changes in the availibility of exogenous arginine was investigated. Upon addition of arginine to the growth medium, catabolism is initiated within minutes. This occurs prior to expansion of the arginine pool or augmentation of catabolic enzyme levels. (Basal levels are approximately 25% o...
journal_title:Journal of bacteriology
pub_type: 杂志文章
doi:10.1128/JB.129.2.866-873.1977
更新日期:1977-02-01 00:00:00
abstract::The model of pneumonia produced by intranasal inoculation of Mycoplasma pulmonis in gnotobiotic mice provided the opportunity to study the localization and identification of the infecting organisms in the tissues by immunofluorescence techniques. Frozen sections of pneumonic mouse lung were fixed in acetone, layered w...
journal_title:Journal of bacteriology
pub_type: 杂志文章
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更新日期:1968-07-01 00:00:00
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journal_title:Journal of bacteriology
pub_type: 杂志文章
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更新日期:1999-11-01 00:00:00
abstract::Howard, Dexter H. (University of California, Los Angeles). Intracellular behavior of Histoplasma capsulatum. J. Bacteriol. 87:33-38. 1964.-The tinctorial characteristics and intracellular generation time of Histoplasma capsulatum within mouse histiocytes maintained in tissue culture were studied. The appearance of via...
journal_title:Journal of bacteriology
pub_type: 杂志文章
doi:10.1128/JB.87.1.33-38.1964
更新日期:1964-01-01 00:00:00
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更新日期:2015-01-01 00:00:00