Purification and biochemical characterization of a mycelial alkaline phosphatase without DNAase activity produced byAspergillus caespitosus

Biochemical properties of a termostable alkaline phosphatase obtained from the mycelium extract ofA. caespitosus were described. The enzyme was purified 42-fold with 32 % recovery by DEAE-cellulose and concanavalin A-Sepharose chromatography. The molar mass estimated by Sephacryl S-200 or by 7 % SDS...

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Published inFolia microbiologica Vol. 52; no. 3; pp. 231 - 236
Main Authors Guimarães, L. H. S., Júnior, A. B., Jorge, J. A., Terenzi, H. F., Polizeli, M. L. T. M.
Format Journal Article
LanguageEnglish
Published Dordrecht Springer Nature B.V 01.05.2007
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Abstract Biochemical properties of a termostable alkaline phosphatase obtained from the mycelium extract ofA. caespitosus were described. The enzyme was purified 42-fold with 32 % recovery by DEAE-cellulose and concanavalin A-Sepharose chromatography. The molar mass estimated by Sephacryl S-200 or by 7 % SDS-PAGE was 138 kDa and 71 kDa, respectively, indicating a homodimer. Temperature and pH optima were 80 °C and pH 9.0. This enzyme was highly glycosylated (≈74 % saccharide content). The activity was enhanced by Mg2+ (19–139 %), NH4+ (64 %), Na+ (51 %) and Mn2+ (38 %). 4-Nitrophenyl phosphate (4-NPP) was preferentially hydrolyzed, but glucose 1-phosphate (93 %), UTP (67 %) andO-phosphoamino acids also acted as substrates.νlim andKm were 3.78 nkat per mg protein and 270 µmol/L in the absence of Mg2+ and 7.35 nkat per mg protein and 410 µmol/L in the presence of Mg2+, using 4-NPP as substrate. The purified alkaline phosphatase removed the 5′-phosphate group of a linearized plasmid without showing DNAase activity, indicating its potential for recombinant DNA technology.
AbstractList Biochemical properties of a termostable alkaline phosphatase obtained from the mycelium extract ofA. caespitosus were described. The enzyme was purified 42-fold with 32 % recovery by DEAE-cellulose and concanavalin A-Sepharose chromatography. The molar mass estimated by Sephacryl S-200 or by 7 % SDS-PAGE was 138 kDa and 71 kDa, respectively, indicating a homodimer. Temperature and pH optima were 80 °C and pH 9.0. This enzyme was highly glycosylated (≈74 % saccharide content). The activity was enhanced by Mg2+ (19–139 %), NH4+ (64 %), Na+ (51 %) and Mn2+ (38 %). 4-Nitrophenyl phosphate (4-NPP) was preferentially hydrolyzed, but glucose 1-phosphate (93 %), UTP (67 %) andO-phosphoamino acids also acted as substrates.νlim andKm were 3.78 nkat per mg protein and 270 µmol/L in the absence of Mg2+ and 7.35 nkat per mg protein and 410 µmol/L in the presence of Mg2+, using 4-NPP as substrate. The purified alkaline phosphatase removed the 5′-phosphate group of a linearized plasmid without showing DNAase activity, indicating its potential for recombinant DNA technology.
Biochemical properties of a termostable alkaline phosphatase obtained from the mycelium extract ofA. caespitosus were described. The enzyme was purified 42-fold with 32 % recovery by DEAE-cellulose and concanavalin A-Sepharose chromatography. The molar mass estimated by Sephacryl S-200 or by 7 % SDS-PAGE was 138 kDa and 71 kDa, respectively, indicating a homodimer. Temperature and pH optima were 80 C and pH 9.0. This enzyme was highly glycosylated (-74 % saccharide content). The activity was enhanced by Mg super(2+) (19-139 %), NH sub(4) super(+) (64 %), Na super(+) (51 %) and Mn super(2+) (38 %). 4-Nitrophenyl phosphate (4-NPP) was preferentially hydrolyzed, but glucose 1-phosphate (93 %), UTP (67 %) andO-phosphoamino acids also acted as substrates. sub(lim) andK sub(m) were 3.78 nkat per mg protein and 270 kmol/L in the absence of Mg super(2+) and 7.35 nkat per mg protein and 410 kmol/L in the presence of Mg super(2+), using 4-NPP as substrate. The purified alkaline phosphatase removed the 5'-phosphate group of a linearized plasmid without showing DNAase activity, indicating its potential for recombinant DNA technology.
ArticleNumber 231
Author Guimarães, L. H. S.
Terenzi, H. F.
Polizeli, M. L. T. M.
Júnior, A. B.
Jorge, J. A.
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CitedBy_id crossref_primary_10_1007_s12223_008_0080_4
crossref_primary_10_1016_S2095_3119_16_61490_9
crossref_primary_10_1007_s12562_013_0613_x
crossref_primary_10_3390_toxins11020118
crossref_primary_10_1134_S1068162021010039
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Snippet Biochemical properties of a termostable alkaline phosphatase obtained from the mycelium extract ofA. caespitosus were described. The enzyme was purified...
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SubjectTerms Alkaline phosphatase
Biochemistry
Carbohydrates
Cellulose
Concanavalin A
Deoxyribonucleic acid
DNA
Enzymes
Gel electrophoresis
Magnesium
Microbiology
Mycelia
pH effects
Proteins
Recombinant DNA
Sodium lauryl sulfate
Substrates
Title Purification and biochemical characterization of a mycelial alkaline phosphatase without DNAase activity produced byAspergillus caespitosus
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