1978
DOI: 10.1007/978-1-4684-3366-1_29
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A Method for Improving the Nutritional Value of Food Proteins: Covalent Attachment of Amino Acids

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Cited by 35 publications
(21 citation statements)
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“…In the latter case, about 6&70% of the lysyl residues were acylated, leading to polymethionine chain lengths of 8-10 residues. It is also interesting to note that, in contrast to the active ester method, which requires protection of the amino acid prior to ita covalent attachment to proteins, the N-carboxyanhydride method avoids treating the modified proteins to remove protecting groups, except for lysine, aspartic acid, and glutamic acid (Hirschmann et al, 1971;Bamford and Block, 1972;Puigserver et al, 1978). This has already been observed with other casein derivatives (Puigserver et el., 1978).…”
Section: Polymerization Of L-methionine On Casein Aminomentioning
confidence: 87%
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“…In the latter case, about 6&70% of the lysyl residues were acylated, leading to polymethionine chain lengths of 8-10 residues. It is also interesting to note that, in contrast to the active ester method, which requires protection of the amino acid prior to ita covalent attachment to proteins, the N-carboxyanhydride method avoids treating the modified proteins to remove protecting groups, except for lysine, aspartic acid, and glutamic acid (Hirschmann et al, 1971;Bamford and Block, 1972;Puigserver et al, 1978). This has already been observed with other casein derivatives (Puigserver et el., 1978).…”
Section: Polymerization Of L-methionine On Casein Aminomentioning
confidence: 87%
“…Chemical methods already available for covalently attaching amino acids to proteins include those used to modify carboxyl and amino groups. When the eamino group of lysyl residues was modified by use of N-hydroxysuccinimide esters (Puigserver et al, 1978(Puigserver et al, ,1979b or N-carboxyanhydrides of limiting amino acids (Bjarnason-Baumann et al, 1977), isopeptide bonds only are formed. group activation, has recently been used to covalently link methionine, tryptophan, or lysine to soy protein isolates and wheat gluten (Li-Chan et al, 1979;Voutsinas and Nakai, 1979).…”
mentioning
confidence: 99%
“…As mentioned above, the bioavailability of methionine covalently linked to casein was found to be as high as that of the free amino acid (Puigserver et al 1978;1979a). These results clearly indicated that the isopeptide bond &-N-methionyllysine was efficiently cleaved in viva The organ location of the enzymatic activity responsible for hydrolyzing this isopeptide bond was determined (Puigserver et al 1979b).…”
Section: In Vitro Digestion Of Chemically Acyiated Proteinsmentioning
confidence: 65%
“…A number of studies have shown that the chemical modification of proteins can usefully decrease the rumen fermentation of feed proteins (Clark 1975). The covalent attachment of methionine or its N-acetylated form, as well as polymethionine to feed proteins could be of practical value, since this amino acid is thought to be the most limiting one for use with dairy cattle (Puigserver et al 1978;Gaertner and Puigserver 1984).…”
Section: Bioavailability Of Chemically Acylated Proteinsmentioning
confidence: 99%
“…On appelle modification chimique la substitution ou l'addition de groupements aux essentiels tels que la lysine (Puigserver et al, 1979), les produits obtenues à l'aide de ces méthodes ont la réputation de posséder une faible qualité nutritionnelle et leur utilisation se heurte à la législation (Chettel & Lorient, 1982). Vuillemard et al protéines par liaison covalente, hydrophobe ou ionique.…”
Section: Modifications Chimiquesunclassified