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  • Nitrilases from Aspergillus niger CBS 513.88, A. niger K10, Gibberella moniliformis, Neurospora crassa OR74A, and Penicillium marneffei ATCC 18224 were expressed in Escherichia coli BL21-Gold (DE3) after IPTG induction. N. crassa nitrilase exhibited the highest yield of 69,000 ULMINUS SIGN 1 culture. Co-expression of chaperones (GroEL/ES in G. moniliformis and P. marneffei; GroEL/ ES and trigger factor in N. crassa and A. niger CBS 513.88) enhanced the enzyme solubility. Specific activities of strains expressing the former two enzymes increased approximately fourfold upon co-expression of GroEL/ES. The enzyme from G. moniliformis (co-purified with GroEL) preferred benzonitrile as substrate (Km of 0.41 mM, Vmax of 9.7 μmol minMINUS SIGN 1 mgMINUS SIGN 1 protein). The P. marneffei enzyme (unstable in its purified state) exhibited the highest Vmax of 7.3 μmol minMINUS SIGN 1 mgMINUS SIGN 1 protein in cellfree extract, but also a high Km of 15.4 mM, for 4- cyanopyridine. The purified nitrilases from A. niger CBS 513.88 and N. crassa acted preferentially on phenylacetonitrile (Km of 3.4 and 2.0 mM, respectively; Vmax of 10.6 and 17.5 μmol minMINUS SIGN 1 mgMINUS SIGN 1 protein, respectively), and hydrolyzed also (R,S)-mandelonitrile with higher Km values. Significant amounts of amides were only formed by the G. Moniliformis nitrilase from phenylacetonitrile and 4-cyanopyridine.
  • Nitrilases from Aspergillus niger CBS 513.88, A. niger K10, Gibberella moniliformis, Neurospora crassa OR74A, and Penicillium marneffei ATCC 18224 were expressed in Escherichia coli BL21-Gold (DE3) after IPTG induction. N. crassa nitrilase exhibited the highest yield of 69,000 ULMINUS SIGN 1 culture. Co-expression of chaperones (GroEL/ES in G. moniliformis and P. marneffei; GroEL/ ES and trigger factor in N. crassa and A. niger CBS 513.88) enhanced the enzyme solubility. Specific activities of strains expressing the former two enzymes increased approximately fourfold upon co-expression of GroEL/ES. The enzyme from G. moniliformis (co-purified with GroEL) preferred benzonitrile as substrate (Km of 0.41 mM, Vmax of 9.7 μmol minMINUS SIGN 1 mgMINUS SIGN 1 protein). The P. marneffei enzyme (unstable in its purified state) exhibited the highest Vmax of 7.3 μmol minMINUS SIGN 1 mgMINUS SIGN 1 protein in cellfree extract, but also a high Km of 15.4 mM, for 4- cyanopyridine. The purified nitrilases from A. niger CBS 513.88 and N. crassa acted preferentially on phenylacetonitrile (Km of 3.4 and 2.0 mM, respectively; Vmax of 10.6 and 17.5 μmol minMINUS SIGN 1 mgMINUS SIGN 1 protein, respectively), and hydrolyzed also (R,S)-mandelonitrile with higher Km values. Significant amounts of amides were only formed by the G. Moniliformis nitrilase from phenylacetonitrile and 4-cyanopyridine. (en)
Title
  • Purification and characterization of heterologously expressed nitrilases from filamentous fungi
  • Purification and characterization of heterologously expressed nitrilases from filamentous fungi (en)
skos:prefLabel
  • Purification and characterization of heterologously expressed nitrilases from filamentous fungi
  • Purification and characterization of heterologously expressed nitrilases from filamentous fungi (en)
skos:notation
  • RIV/00216208:11310/12:10104142!RIV13-GA0-11310___
http://linked.open...avai/predkladatel
http://linked.open...avai/riv/aktivita
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  • I, P(GAP504/11/0394), P(GD305/09/H008), P(IAA500200708), P(LC06010), P(OC09046), S, Z(AV0Z50200510)
http://linked.open...iv/cisloPeriodika
  • 4
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  • 163640
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  • RIV/00216208:11310/12:10104142
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  • Penicillium marneffei; Neurospora crassa; Gibberella moniliformis; Aspergillus niger; Chaperones; Nitrilase (en)
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  • DE - Spolková republika Německo
http://linked.open...ontrolniKodProRIV
  • [5AA00385B1D1]
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  • Applied Microbiology and Biotechnology
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http://linked.open...v/svazekPeriodika
  • 93
http://linked.open...iv/tvurceVysledku
  • Bezouška, Karel
  • Křen, Vladimír
  • Kaplan, Ondřej
  • Martínková, Ludmila
  • Petříčková, Alena
  • Uhnáková, Bronislava
  • Felsberg, Jürgen
  • Malandra, Anna
  • Rinágelová, Anna
  • Veselá, Alicja Barbara
  • Kubáč, David
  • Weyrauch, Philip
http://linked.open...ain/vavai/riv/wos
  • 000300310100018
http://linked.open...n/vavai/riv/zamer
issn
  • 0175-7598
number of pages
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  • 10.1007/s00253-011-3525-7
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  • 11310
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