106719-44-2Relevant articles and documents
Reconstitution of peptidoglycan cross-linking leads to improved fluorescent probes of cell wall synthesis
Lebar, Matthew D.,May, Janine M.,Meeske, Alexander J.,Leiman, Sara A.,Lupoli, Tania J.,Tsukamoto, Hirokazu,Losick, Richard,Rudner, David Z.,Walker, Suzanne,Kahne, Daniel
supporting information, p. 10874 - 10877 (2014/08/18)
The peptidoglycan precursor, Lipid II, produced in the model Gram-positive bacterium Bacillus subtilis differs from Lipid II found in Gram-negative bacteria such as Escherichia coli by a single amidation on the peptide side chain. How this difference affects the cross-linking activity of penicillin-binding proteins (PBPs) that assemble peptidoglycan in cells has not been investigated because B. subtilis Lipid II was not previously available. Here we report the synthesis of B. subtilis Lipid II and its use by purified B. subtilis PBP1 and E. coli PBP1A. While enzymes from both organisms assembled B. subtilis Lipid II into glycan strands, only the B. subtilis enzyme cross-linked the strands. Furthermore, B. subtilis PBP1 catalyzed the exchange of both d-amino acids and d-amino carboxamides into nascent peptidoglycan, but the E. coli enzyme only exchanged d-amino acids. We exploited these observations to design a fluorescent d-amino carboxamide probe to label B. subtilis PG in vivo and found that this probe labels the cell wall dramatically better than existing reagents.
Synthesis of Unnatural Amino Acids
Acosta, C. Kirk,Bahr, Martin L.,Burdett, James E.,Cessac, James W.,Martinez, Rudy A.,et al.
, p. 914 - 934 (2007/10/02)
This communication presents efficient synthetic procedures for the D and L isomers of Nα-tert-butyloxycarbonyl-Nε-benzyloxycarbonyl-Nε-isopropyllysine dicyclohexylamine salt (Nα-Boc-Nε-Z-Ilys DCHA salt), the D and L isomers of Nα-tert-butyloxycarbonyl-Nεnicotinoyllysine (Nα-Boc-Niclys), β-(3-quinolyl)-D,L-alanine (3-Quinal), and the resolution into the D and L isomers of 3-Quinal.
Synthetic peptides having pituitary growth hormone releasing activity
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, (2008/06/13)
Novel pentapeptides having the following amino acid sequenceX--Y--Z--E--G--J--Lwherein X is selected from a group consisting of --NH 2, --NHCH 3, and --N(CH 3) 2 ; Y is selected from a group consisting of D-lysine and D-arginine; Z and J are independently selected from a group consisting of tyrosine, tryptophan, and phenylalanine; E and G are independently selected from a group consisting of D-tyrosine, D-tryptophan, and D-phenylalanine; and L is a C-terminal functional group selected from a group consisting of amide, amide lower alkyl, amide di(lower alkyl), lower alkoxy, hydroxy, and carboxy and the lower ester derivatives thereof; and the pharmaceutically acceptable salts thereof. These peptides act directly on the pituitary to release growth hormone therefrom.