ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Publication Date: 2022-11-07
    Description: Lectins act as cell recognition molecules, and probably in plant defense. The CqLEC, lectin from Ch. quinoa cv Salcedo INIA, was isolated, purified and characterized from 70 g of seeds through saline extraction, and the combination of two molecular exclusion chromatographies such as Sephadex G-100 and G -75, obtaining 5.53 mg/ml of protein with hemagglutinating activity, as well as by reverse phase HPLC at 32 minutes with 54% buffer B, indicating that it had a low number of hydrophobic residues in its structure. Likewise, SDS-PAGE showed that the purified lectin was homogeneous since it had a single component corresponding to a 12.82 kDa protein. Being that the CqLEC agglutinated human erythrocytes of the “O Rh+” blood group with an MHC of 1.95 μg/ml, inhibited by fucose (0.78 mM) and the chelating agent EGTA (0.1 mM), this indicated that would be a fucose-binding lectin dependent on divalent ions such as calcium or manganese. On the other hand, this protein showed specific bactoagglutination for E. coli (CMB equal to 200 μg/ml), as well as insecticidal activity against Symmetrischema plaesiosema larvae (1000 ppm of CqLEC, P 〈 0.05). Complete amino acid analysis revealed that CqLEC is an acidic lectin (70.54% hydrophilic residues and 29.46% hydrophobic residues), with glutamic acid (33%) prevailing, with a molecular mass of 12.859 kDa. By sequential homology study, it was determined that it belongs to the family of vegetable lectins of Legumes, showing 82.1% similarity with the precursor of agglutinin I extracted from the bark of Cladrastis kentukea. The CqLEC also presented highly conserved residues in its structure, such as Leu 4, Ser 6 and Phe 7.
    Description: Published
    Description: Las lectinas actúan como moléculas de reconocimiento celular, y probablemente en la defensa vegetal. La CqLEC, lectina de Ch. quinoa cv Salcedo INIA, fue aislada, purificada y caracterizada a partir de 70 g de semillas a través de extracción salina, y la combinación de dos cromatografías de exclusión molecular tales como las de Sephadex G-100 y G-75 logrando obtenerse 5,53 mg/ml de proteína con actividad hemaglutinante, así como por HPLC de fase reversa a los 32 minutos con 54 % de tampón B indicando que poseía un bajo número de residuos hidrofóbicos en su estructura. Asimismo, el SDS-PAGE demostró que la lectina purificada fue homogénea ya que presentaba un solo componente correspondiente a una proteína de 12,82 kDa. Siendo que la CqLEC aglutinó eritrocitos humanos del grupo sanguíneo “O Rh+” con una CMH de 1,95 mg/ml, inhibido por fucosa (0,78 mM) y el agente quelante EGTA (0,1 mM), esto indicaba que sería una lectina ligadora de fucosa dependiente de iones divalentes tales como el calcio o el manganeso. Por otra parte, esta proteína mostró una bactoaglutinación específica para E. coli (CMB igual a 200 mg/ml), así como actividad insecticida en contra de larvas de Symmetrischema plaesiosema (1000 ppm of CqLEC, P 〈 0,05). El análisis completo de aminoácidos reveló que la CqLEC es una lectina de naturaleza ácida (70,54 % de residuos hidrofílicos y 29,46 % de residuos hidrofóbicos), prevaleciendo el ácido glutámico (33 %), con una masa molecular de 12,859 kDa. Por estudio de homología secuencial se determinó que ésta pertenece a la familia de lectinas vegetales de Leguminosas, mostrando 82,1 % de similitud con el precursor de la aglutinina I extraída a partir de la corteza de Cladrastis kentukea. La CqLEC también presentó residuos altamente conservados en su estructura tales como Leu 4, Ser 6 y Phe 7.
    Keywords: lectina ; Chenopodium quinoa ; actividad insecticida ; bic Book Industry Communication::R Earth sciences, geography, environment, planning
    Language: Spanish
    Format: image/jpeg
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...