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2015, Number 1

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Rev Esp Cienc Salud 2015; 18 (1)

The Importance of the Storage Proteins in Cereals (Prolamins)

Hernández-Espinosa N, Reyes-Reyes M, González-Jiménez FE, Núñez-Bretón LC, Cooper-Bribiesca BL

Language: Spanish
References: 28
Page: 3-7
PDF size: 385.77 Kb.


ABSTRACT

Prolamins are the storage proteins present in the endosperm of some cereals, they are rich in amino acids (AA) Proline and Glutamine. Prolamins have been studied by several research groups nowadays because of their functional properties, mainly the extensibility and elasticity besides their relationship with the chronic gastrointestinal disease called Celiac disease (CD). These proteins are characterized by having a-helix globular domain with 6-8 cysteine residues and 3-4 disulfide bonds being highly soluble in ethanol (40-70%). Prolamins are classified into three different types: sulfur-rich prolamins (α-, β- γ gliadins), sulfur-poor prolamins (ω-gliadins) and high molecular weight prolamins. On the other hand they get their names from the cereal source they are extracted from, for example: secalin (rye), hordein (barley), avenin (oats), zein (corn), orzein (rice), kafirin (sorghum) and gliadin (wheat). These proteins (except avenin) are associated with the CD and have recently been related to an α-gliadin peptide composed of 33 AA (33-mer) which are believed to be responsible for causing this enteropathy. The aim of this review is to show the importance and characteristics of prolamins present in some cereals which are crucial in the worldwide feeding.


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