transamidation

trans·am·i·da·tion

(trans-am'i-dā'shŭn),
The transfer of NH2 from an amide moiety (for example, from glutamine) to another molecule.
References in periodicals archive ?
If the polymerization parameters are controlled, branching or side reactions (transacylation or transamidation) can be prohibited; hence, the chain extending of polymers will comprise acyllactam structures, and the number of propagated polyamide chains shall be equal to that of the activators.
Kaartinen, "Serotonin (5-HT) inhibits factor XIII-A-mediated plasma fibronectin matrix assembly and crosslinking in osteoblast cultures via direct competition with transamidation," Bone, vol.
Menon, "A cell-free assay for glycosylphosphatidylinositol anchoring in African trypanosomes--demonstration of a transamidation reaction mechanism," Journal of Biological Chemistry, vol.
These include the formation of anionic polyacrylamide through hydrolysis, (17) the synthesis of sulfomethylated derivatives from the reaction of polyacrylamide with formaldehyde and sodium bisulfate, (18) the formation of aminomethylated polyacrylamide from the reaction of polyacrylamide with formaldehyde and dimethylamine (Mannich reaction), (19) and the generation of various derivatives by transamidation reactions including hydroxamated polyacrylamides used as a flocculant in the Bayer process.
Transfer of GPI to proteins is mediated by GPI-transamidase, which recognizes the GPI-attachment signal sequence and replaces it with the GPI-precursor by a transamidation reaction (Fig.
Tissue transglutaminase (tTG), as a multifunctional protein, performs a variety of intracellular and extracellular functions, including hydrolyzing GTP, transamidation activity as a catalyzing enzyme, and cross-linking glutamine residues and lysine residues of proteins.
It has been reported that cross-linking by amidation between carbonyl and [epsilon]-amino groups or by transamidation between such groups with the elimination of ammonia occurs upon severe heat treatment in protein molecules (Feeney, 1975).
Estradiol-regulated transamidation of keratins by vaginal epithelial cell transglutaminase.
Biochemical evidence indicates that aspartyl-tRNA synthetase initially synthesizes [Asp-tRNA.sup.Asn], which is subsequently converted to [Asn-tRNA.sup.Asn] in a distinct tRNA-dependent transamidation reaction (6).
the use of proton NMR was described by the Authors as a valid method to assess the occurrence of the transamidation reactions between MXD6 and PA6I-6T polyamides and to determine the block length and randomness degree around the isophthalic units.
It has been reported that cross-linking by amidation between carbonyl and a-amino groups or by transamidation between such groups with the elimination of ammonia occurs upon severe heat treatment in protein molecules (Feeney, 1975).
The distribution of the monodisperse amide segments did not broaden upon melt polymerization, suggesting that hardly any transamidation reactions took place (8).