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Registros recuperados : 249 | |
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Registro Completo
Biblioteca(s): |
Embrapa Cerrados. |
Data corrente: |
22/12/2011 |
Data da última atualização: |
22/12/2011 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Circulação/Nível: |
A - 2 |
Autoria: |
MULINARI, F.; BECKER-RITT, A. B.; DEMARTINI, D. R.; LIGABUE-BRAUN, R.; STANISÇUASKI, F.; VERLI, H.; FRAGOSO, R. R.; SCHROEDER, E. K.; CARLINI, C. R.; GROSSI-de-SÁ, M. F. |
Afiliação: |
FERNANDA MULINARI, UFRGS; ARLETE BEATRIZ BECKER-RITT, UFRGS; DIOGO RIBEIRO DEMARTINI, UFRGS; RODRIGO LIGABUE-BRAUN, UFRGS; FERNANDA STANISÇUASKI, UFRGS; HUGO VERLI, UFRGS; RODRIGO DA ROCHA FRAGOSO, CPAC; EVELYN KOECHE SCHROEDER, UFRGS; CÉLIA REGINA CARLINI, UFRGS; MARIA FATIMA GROSSI DE SA, CENARGEN. |
Título: |
Characterization of JBURE-IIb isoform of Canavalia ensiformis (L.) DC urease. |
Ano de publicação: |
2011 |
Fonte/Imprenta: |
Biochimica et Biophysica Acta, v. 1814, n. 12, p. 1758-1768, Dec. 2011. |
ISSN: |
1570-9639 |
Idioma: |
Inglês |
Conteúdo: |
Ureases, nickel-dependent enzymes that catalyze the hydrolysis of urea into ammonia and bicarbonate, are
widespread in plants, bacteria, and fungi. Previously, we cloned a cDNA encoding a Canavalia ensiformis urease
isoform named JBURE-II, corresponding to a putative smaller urease protein (78 kDa) when compared to
other plant ureases. Aiming to produce the recombinant protein, we obtained jbure-IIb, with different 3? and
5? ends, encoding a 90 kDa urease. Three peptides unique to the JBURE-II/-IIb protein were detected by mass
spectrometry in seed extracts, indicating that jbure-II/-IIb is a functional gene. Comparative modeling indicates
that JBURE-IIb urease has an overall shape almost identical to C. ensiformis major urease JBURE-I with
all residues critical for urease activity. The cDNA was cloned into the pET101 vector and the recombinant protein
was produced in Escherichia coli. The JBURE-IIb protein, although enzymatically inactive presumably due
to the absence of Ni atoms in its active site, impaired the growth of a phytopathogenic fungus and showed
entomotoxic properties, inhibiting diuresis of Rhodnius prolixus isolated Malpighian tubules, in concentrations
similar to those reported for JBURE-I and canatoxin. The antifungal and entomotoxic properties of the
recombinant JBURE-IIb apourease are consistent with a protective role of ureases in plants. |
Thesagro: |
Canavalia Ensiformis. |
Categoria do assunto: |
-- |
Marc: |
LEADER 02108naa a2200253 a 4500 001 1910728 005 2011-12-22 008 2011 bl --- 0-- u #d 022 $a1570-9639 100 1 $aMULINARI, F. 245 $aCharacterization of JBURE-IIb isoform of Canavalia ensiformis (L.) DC urease. 260 $c2011 520 $aUreases, nickel-dependent enzymes that catalyze the hydrolysis of urea into ammonia and bicarbonate, are widespread in plants, bacteria, and fungi. Previously, we cloned a cDNA encoding a Canavalia ensiformis urease isoform named JBURE-II, corresponding to a putative smaller urease protein (78 kDa) when compared to other plant ureases. Aiming to produce the recombinant protein, we obtained jbure-IIb, with different 3? and 5? ends, encoding a 90 kDa urease. Three peptides unique to the JBURE-II/-IIb protein were detected by mass spectrometry in seed extracts, indicating that jbure-II/-IIb is a functional gene. Comparative modeling indicates that JBURE-IIb urease has an overall shape almost identical to C. ensiformis major urease JBURE-I with all residues critical for urease activity. The cDNA was cloned into the pET101 vector and the recombinant protein was produced in Escherichia coli. The JBURE-IIb protein, although enzymatically inactive presumably due to the absence of Ni atoms in its active site, impaired the growth of a phytopathogenic fungus and showed entomotoxic properties, inhibiting diuresis of Rhodnius prolixus isolated Malpighian tubules, in concentrations similar to those reported for JBURE-I and canatoxin. The antifungal and entomotoxic properties of the recombinant JBURE-IIb apourease are consistent with a protective role of ureases in plants. 650 $aCanavalia Ensiformis 700 1 $aBECKER-RITT, A. B. 700 1 $aDEMARTINI, D. R. 700 1 $aLIGABUE-BRAUN, R. 700 1 $aSTANISÇUASKI, F. 700 1 $aVERLI, H. 700 1 $aFRAGOSO, R. R. 700 1 $aSCHROEDER, E. K. 700 1 $aCARLINI, C. R. 700 1 $aGROSSI-de-SÁ, M. F. 773 $tBiochimica et Biophysica Acta$gv. 1814, n. 12, p. 1758-1768, Dec. 2011.
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