Amino Acids, Peptides and Proteins (SPR Amino Acids, by John S. Davies

By John S. Davies

Critical reference resource for researchers within the pharmaceutical and allied industries, and on the biology/chemistry interface in academia. summary: necessary reference resource for researchers within the pharmaceutical and allied industries, and on the biology/chemistry interface in academia. learn more...

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Additional info for Amino Acids, Peptides and Proteins (SPR Amino Acids, Peptides, and Proteins (RSC)) (Vol 36)

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Proteins, 2007, 36, 19–81 | 45 This journal is  c The Royal Society of Chemistry 2007 showing the promise of kinase inhibitors have begun to validate PTK signaling blockade as an efficacious anticancer therapeutic approach. Src homology 2 (SH2) domains provide connectivity in PTK-dependent signaling through their high affinity association with phosphotyrosyl (pTyr)-containing peptide sequences. 142 An important aspect of the current synthetic approach is its ability to prepare this new constrained pTyr mimetic in the absence of a potentially undesirable methyl substituent at the bridgehead 1-position.

130 Tryptophan synthase is a bienzyme complex that catalyzes the final two steps in the biosynthesis of L-Trp in bacteria and plants. It has been used in the synthesis of a wide variety of Trp analogs, as well as other unnatural L-amino acids. The b-subunit catalyzes the condensation of indole with L-Ser to give L-Trp. The b-reaction has been used for the preparation of a wide range of analogues of L-Trp, as well as aza, thia, and selena heterocyclic analogues. 2. 12 Phosphorus-containing a-amino acids The key role of a-amino acids in the chemistry of life and as structural units in peptides and proteins has led to intense interest in the chemistry and biology of their mimics.

182 Most inhibitors of angiotensin converting enzyme (ACE) contain an L-homoPhe ethyl ester moiety in their structure. Despite the convenience of chemo-enzymatic methods in synthetic organic chemistry, some uneasiness still exists among synthetic chemists regarding the handling of enzymes. Furthermore, most commercially available enzymes are expensive and can be unstable, unless kept under specific storage conditions. Most of these drawbacks could be avoided by using crude enzymatic preparations; however, the use of these raw preparations is much less explored than the use of pure enzymes.

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