Peptidoglycan biosynthesis in Escherichia coli: variations in the metabolism of alanine and D-alanyl-D-alanine
نویسندگان
چکیده
منابع مشابه
Growth inhibition of Escherichia coli W by D-norvalyl-D-alanine: an analogue of D-alanine in position 4 of the peptide subunit of peptidoglycan.
Position 4 analogues of d-alanine in the peptide subunit of uridine 5'-diphosphate-N-acetylmuramyl-Ala(1)-dGlu(2)- Lys(3)-dAla(4)-dAla(5) have a significant inhibitory effect on penicillin-sensitive peptidoglycan synthesis in Gaffkya homari (C. V. Carpenter, S. Goyer, and F. C. Neuhaus, 1976). The specificity profile of this in vitro system has been used as a basis for designing analogues with ...
متن کاملRegulation of D-alanine carboxypeptidase and peptidoglycan cross-linkage in amino acid-deprived Escherichia coli.
The effect of amino acid deprivation on the activities of D-alanine carboxypeptidase (CPase) and peptidoglycan transpeptidase in Escherichia coli was determined. Enzymes were assayed in ether-treated bacteria (ETB) which were permeable to peptidoglycan nucleotide precursors. ETB were prepared at intervals from cultures grown in the presence and absence of a required amino acid. The specific act...
متن کاملComplexation of acetyl-D-alanyl-D-alanine by antibiotic A35512B.
Antibiotic A3 5512B1.2) is a member of the glycopeptide family of antibiotics; complete structures have been reported for two members of this group, vancomycin3' and ristocetin A4' a) . Both vancomycin and ristocetin have been shown to form complexes with mucopeptides containing the terminal dipeptide D-alanyl-D-alaninee) ; this interaction within the bacterial cell inhibits crosslinking of the...
متن کاملTemperature-sensitive mutants of Escherichia coli K-12 with low activities of the L-alanine adding enzyme and the D-alanyl-D-alanine adding enzyme.
A number of properties of temperature-sensitive mutants in murein synthesis are described. The mutants grow at 30 C but lyse at 42 C. One mutant possesses a temperature-sensitive d-alanyl-d-alanine adding enzyme, has an impaired rate of murein synthesis in vivo at both 30 and 42 C, and contains elevated levels of uridine diphosphate-N-acetyl-muramyl-tripeptide (UDP-MurNAc-l-Ala-d-Glu-m-diaminop...
متن کاملD-alanine oxidase from Escherichia coli: participation in the oxidation of L-alanine.
Cell wall-membrane preparations of Escherichia coli, prepared by the ethylenediaminetetraacetic acid-lysozyme method, contain enzymes which catalyze the oxidation of d-alanine and, to a lesser extent, l-alanine into pyruvate and ammonia without the formation of hydrogen peroxide. The kinetic parameters were (i) pH optima of 8.3 to 8.4 for l- and d-alanine and (ii) a K(m) value of 6.6 +/- 0.2 mM...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of General Microbiology
سال: 1992
ISSN: 0022-1287
DOI: 10.1099/00221287-138-8-1751