In the water-soluble fraction of rabbit skeletal muscle, at least two types of inorganic pyro phosphatase (PPase) are distinguishable on ion exchange column chromatography. One of them, pyrophosphatase-A (PPase-A), was isolated in an electrophoretically homogeneous form. This enzyme catalyzed the hydrolysis of PPi but not that of other phosphate esters. Only Mg2+ was required for activity and stability. Other cations such as Ca2+, Co2+, Mn2+, and Zn2+ had no activating effect. The activity of this PPase was optimum at pH 7.4. ATP, ADP, sodium imidodiphosphate (PNP), p-chloromercuribenzoate, and Ca2+ inhibited its enzymic activity. The enzyme was protected by dithiothreitol (DTT) against heat denaturation. The molecular weight was estimated to be 67,000 by gel filtration and the molecular size of the subunit was found to be 35,000 by gel electrophoresis in the presence of sodium dodecyl sulfate (SDS). The enzyme probably consists of two identical subunits of 35,000 daltons.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1093/oxfordjournals.jbchem.a131965 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Overestimated role of inoculation bacteria-algae ratio in wastewater treatment.
Water Environ Res
January 2025
College of Urban Construction, Wuhan University of Science and Technology, Wuhan, China.
Microalgae-bacteria systems present a promising approach for CO reduction in wastewater treatment. The effect of inoculation bacteria-algae ratio on performance was investigated in this study. Different inoculation ratios (bacteria: algae 1:2, 1:1, 1:0.
View Article and Find Full Text PDFChitosan and Its Nanoparticles: A Multifaceted Approach to Antibacterial Applications.
Nanomaterials (Basel)
January 2025
Department of Molecular Biology and Genetics, Çanakkale Onsekiz Mart University, Çanakkale 17100, Türkiye.
Chitosan, a multifaceted amino polysaccharide biopolymer derived from chitin, has extensive antibacterial efficacy against diverse pathogenic microorganisms, including both Gram-negative and Gram-positive bacteria, in addition to fungi. Over the course of the last several decades, chitosan nanoparticles (NPs), which are polymeric and bio-based, have garnered a great deal of interest as efficient antibacterial agents. This is mostly due to the fact that they are used in a wide variety of applications, including medical treatments, food, chemicals, and agricultural products.
View Article and Find Full Text PDFAntioxidant and Anti-Obesity Properties of Acidic and Alkaline Seaweed Extracts Adjusted to Different pH Levels.
Mar Drugs
January 2025
National Food Institute, Technical University of Denmark, 2800 Kongens Lyngby, Denmark.
This research examined antioxidant and anti-obesity effects of extracts obtained through acidic or alkaline treatments and subsequent pH adjustments. After two rounds of acidic or alkaline extraction, the extracts were separated from biomass and adjusted to different pH values: for acidic extracts, pH 3 (no adjustment), pH 6, pH 9, and pH 12; for alkaline extracts, pH 12 (no adjustment), pH 9, pH 6, and pH 3. The findings revealed that extraction medium as well as subsequent pH adjustments significantly influenced composition of the extracts in terms of protein content and recovery, amino acids, and phenolic compounds ( < 0.
View Article and Find Full Text PDFStructure of a Sulfated Capsular Polysaccharide from the Marine Bacterium KMM 1449 and a Genomic Insight into Its Biosynthesis.
Mar Drugs
January 2025
G.B. Elyakov Pacific Institute of Bioorganic Chemistry, Far Eastern Branch, Russian Academy of Sciences, 159/2, Prospect 100 Let Vladivostoku, Vladivostok 690022, Russia.
Some marine and extremophilic microorganisms are capable of synthesizing sulfated polysaccharides with a unique structure. A number of studies indicate significant biological properties of individual sulfated polysaccharides, such as antiproliferative activity, which makes them a promising area for further research. In this study, the capsular polysaccharide (CPS) was obtained from the bacterium KMM 1449, isolated from a marine sediment sample collected along the shore of the Sea of Japan.
View Article and Find Full Text PDFA Comparative Review of Alternative Fucoidan Extraction Techniques from Seaweed.
Mar Drugs
January 2025
Institute for Bioengineering, The School of Engineering, The University of Edinburgh, Edinburgh EH9 3DW, UK.
Fucoidan is a sulfated polysaccharide found in brown seaweed. Due to its reported biological activities, including antiviral, antibacterial and anti-inflammatory activities, it has garnered significant attention for potential biomedical applications. However, the direct relationship between fucoidan extracts' chemical structures and bioactivities is unclear, making it extremely challenging to predict whether an extract will possess a given bioactivity.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!