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Artículo

Structural Modifications of Amaranth Proteins During Germination

Aphalo, PaulaIcon ; Martinez, Estela NoraIcon ; Añon, Maria CristinaIcon
Fecha de publicación: 02/2009
Editorial: Springer
Revista: Protein Journal
ISSN: 1572-3887
Idioma: Inglés
Tipo de recurso: Artículo publicado
Clasificación temática:
Métodos de Investigación en Bioquímica

Resumen

Amaranth storage proteins begin to be hydrolyzed immediately following the completion of germination. Albumins and globulins (7S globulin, 11S-globulin and globulin-p) were formerly modified, and glutelins, the most aggregated fraction, later. Globulins mobilization starts with the proteolysis of the 7S like-globulin polypeptides and the propolypeptide and acid (A) polypeptides of 11S-globulin and globulin-p. This pattern of 11S-globulin mobilization is accounted by the structural model with propolypeptide and A polypeptides exposed to the outside. Amaranth globulin molecules showed minor changes in their sizes in spite of having some of their polypeptides cleaved. Although globulin-p is more aggregated than 11S-globulin, it showed greater conformational changes. Considering the high susceptibility of the propolypeptide to enzymatic hydrolysis, the higher content of this polypeptide in globulin-p molecules might explain their higher structural changes. According to the results, the order of mobilization of storage proteins depends on the combination of two structural characteristics, the state of aggregation and the presence on the surface of polypeptides susceptible to cleavage.
Palabras clave: AMARANTH PROTEINS , PROTEIN MOBILIZATION , PROTEOLYTIC CLEAVAGE , STORAGE PROTEINS , STRUCTURE MODIFICATION
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info:eu-repo/semantics/restrictedAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Creative Commons Attribution-NonCommercial-ShareAlike 2.5 Unported (CC BY-NC-SA 2.5)
Identificadores
URI: http://hdl.handle.net/11336/149124
URL: https://link.springer.com/article/10.1007/s10930-009-9173-4
DOI: http://dx.doi.org/10.1007/s10930-009-9173-4
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Articulos(CIDCA)
Articulos de CENTRO DE INV EN CRIOTECNOLOGIA DE ALIMENTOS (I)
Citación
Aphalo, Paula; Martinez, Estela Nora; Añon, Maria Cristina; Structural Modifications of Amaranth Proteins During Germination; Springer; Protein Journal; 28; 3-4; 2-2009; 131-138
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