The Disulfide Bonds of Egg White Lysozyme (Muramidase)
نویسندگان
چکیده
منابع مشابه
The Disulfide Bonds of Egg White Lysozyme (muramidase).
The availability of the amino acid sequence of egg white lysoeyme makes it possible to identify the pairing of the 8 half-cystine residues that give rise to the four disulfide bonds present in the native protein (1,2). In establishing the positions of the disulfide bonds in insulin (3, 4) and ribonuclease (5, 6) it was shown that disulfide interchange, which occurs under certain experimental co...
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Reduced partially carboxymethylated hen egg white lysozyme (mucopeptide N-acetylmuramoylhydrolase; EC 3.2.1.17) (approximately 0.8 mol of [1-(14)C]carboxymethyl groups) was air oxidized at pH 8.0 and 37 degrees in the presence of 1.5 mM 2-mercaptoethanol for 36 hr. Gel filtration of this product gave the lower (native) and higher hydrodynamic volume forms, both containing radioactivity (approxi...
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Lysozyme mRNA was translated in a reticulocyte lysate with mixtures of radioactive amino acids. The in vitro product isolated by immunoprecipitation was shown by gel electrophoresis, peptide mapping, and sequence analysis to be larger than lysozyme synthesized in uiuo. An NH,-terminal extension was completely sequenced by automated Edman degradation; the phenylthiohydantoins from each cycle wer...
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Proton tautomerism is a general phenomenon in organic molecules and plays a vital role in many fields of chemistry and biochemistry. The tautomerism of salicylideneanilines [eq(1)] has attracted a considerable attention because it is closely related to thermoand photochromism. Salicylideneanilines greatly favor the enol form over the cis-keto form in the gas phase. We demonstrate here that the ...
متن کاملStabilization of phage T4 lysozyme by engineered disulfide bonds.
Four different disulfide bridges (linking positions 9-164, 21-142, 90-122, and 127-154) were introduced into a cysteine-free phage T4 lysozyme at sites suggested by theoretical calculations and computer modeling. The new cysteines spontaneously formed disulfide bonds on exposure to air in vitro. In all cases the oxidized (crosslinked) lysozyme was more stable than the corresponding reduced (non...
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ژورنال
عنوان ژورنال: Journal of Biological Chemistry
سال: 1965
ISSN: 0021-9258
DOI: 10.1016/s0021-9258(18)97416-8