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Wyświetlanie 1-15 z 49
Tytuł:
Evaluation of P1 substrate specificity of staphylococcal SplB protease
Autorzy:
Pustelny, Katarzyna
Stach, Natalia
Wladyka, Benedykt
Dubin, Adam
Dubin, Grzegorz
Powiązania:
https://bibliotekanauki.pl/articles/1039355.pdf
Data publikacji:
2014
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
serine protease
serine protease-like
SplB
Staphylococcus aureus
substrate specificity
Opis:
Staphylococcus aureus is a dangerous human pathogen characterized by growing antibiotic resistance. Virulence of S. aureus relies on a variety of secreted and cell surface associated virulence factors among which certain proteolytic enzymes play an important role. Amid staphylococcal extracellular proteases, those encoded by the spl operon remain poorly characterized, both in terms of enzymology and their physiological role. Initial data demonstrated that Spl proteases exhibit restricted substrate specificity. This study describes development of convenient protein FRET substrates for SplB protease and characterization of the substrate preference of the protease at the P1' position. Kinetic data on hydrolysis of a panel of substrates substituted at the said position is provided.
Źródło:
Acta Biochimica Polonica; 2014, 61, 1; 149-152
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
New proteases of the chloroplast envelope – what do they do there?
Autorzy:
Adam, Z.
Powiązania:
https://bibliotekanauki.pl/articles/80681.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
conference
protease
chloroplast
thylakoid
proteomics
allene oxide synthase
jasmonic acid
serine protease
Źródło:
BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology; 2013, 94, 3
0860-7796
Pojawia się w:
BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The use of enzymatic fungal activity in the food industry - review
Autorzy:
Drozłowska, Emilia
Powiązania:
https://bibliotekanauki.pl/articles/1076386.pdf
Data publikacji:
2019
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
amylases
enyzmes
fungi
laccase
protease
Opis:
Enzymes are increasingly used in the food industry, due to the fact that they allow to streamline many processes. They catalyse processes that require energy and are long-lasting. Mushrooms produce hydrolytic enzymes such as proteases, lipases and amylases. These enzymes are used in winemaking, brewing, confectionery and cheese production. Attempts have also been made to use paper industry enzymes such as laccase in the wine industry. The production of enzymes of animal origin is an expensive and complicated process, which is why they were interested in their production from microorganisms. This article attempts to review the current state of knowledge on the use of fungal enzymes in the food industry.
Źródło:
World Scientific News; 2019, 116; 222-229
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Proteolytic activity in the midgut of the crimson speckled moth Utethesia pulchella L. (lepidoptera: arctiidae)
Autorzy:
Ajamhassani, M.
Zibaee, A.
Sendi, J.J.
Askary, H.
Farrar, N.
Powiązania:
https://bibliotekanauki.pl/articles/961656.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
utethesia pulchalle
midgut
protease
inhibitor
Opis:
Samples were prepared from the midgut of 4th instar larvae of the crimson speckled moth Utethesia pulchella L. to find proteolytic activity and properties. Result revealed the presence of high proteolytic activity in the midgut when taking into account specific proteinases including trypsin-like, chymotrypsin-like, elastase and two exopeptidase (aminopeptidase and carboxipeptidase). The optimal pH of general protease was 8 and 7 when using azocasein and hemoglobin as general substrates, respectively. The optimal temperature of the total proteolytic activity in the midgut of U. pulchella was 25°C and 30°C when using azocasein and hemoglobin, respectively. Proteolytic activity was inhibited significantly by soybean trypsin inhibitor (SBTI), phenylmethylsulfonyl fluoride (PMSF), trypsin inhibitor (TLCK), chymotrypsin inhibitor (TPCK) and Phenanthroline. These results provide evidences for the presence of serine proteinases as the major proteases in the midgut of U. pulchella; a key rangeland pest in warm climates. The interaction between digestive proteases and protease inhibitors have potentially important consequences for pest management programs.
Źródło:
Journal of Plant Protection Research; 2012, 52, 3
1427-4345
Pojawia się w:
Journal of Plant Protection Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Immobilization of Bacillus megaterium in Carrageenan from Maluku Sea and Their Effect on Protease Production
Autorzy:
Hamdani, Syarif
Nurlatifah, Sri
Astriany, Dewi
Singgih, Marlia W.
Ibrahim, Slamet W.
Powiązania:
https://bibliotekanauki.pl/articles/1811540.pdf
Data publikacji:
2020
Wydawca:
Politechnika Koszalińska. Wydawnictwo Uczelniane
Tematy:
carrageenan
immobilization
protease activity
Bacillus megaterium
Opis:
Bacteria immobilized in carrageenan are widely used in industry to facilitate bacterial handling and storage. Carrageenan is derived from seaweed and its nature is influenced by the condition of the origin of the sea where seaweed grows, one of the Indonesia sea territories that has seaweed that contains caraganen with good properties is Maluku. This study was conducted to determine the effect of storage time of bacteria immobilized in Maluku sea’s carrageenan on proteolytic activity, the bacteria used were Bacillus megaterium. Bacterial immobilization of carrageenan was made at concentrations of 1%, 1.5%, and 2%, storage in cold conditions for up to 9 months. Protease activity was tested using Kunitz method by adding casein as a substrate. The optimal concentration of carrageenan for immobilization of Bacillus megaterium was obtained at a concentration of 1.5%. Protease isolated from immobilized Bacillus megaterium showed increased activity value from storage for 4 months (0.0489 Ug-1) to 7 months (0.1372 Ug-1), and decreased activity after being stored for 9 months (0.0501 Ug-1).
Źródło:
Rocznik Ochrona Środowiska; 2020, Tom 22, cz. 1; 60-69
1506-218X
Pojawia się w:
Rocznik Ochrona Środowiska
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Hydroxyapatite as a support in protease immobilization process
Autorzy:
Zdarta, J.
Budzinska, K.
Kolodziejczak-Radzimska, A.
Klapiszewski, Ł.
Siwinska-Stefanska, K.
Bartczak, P.
Piasecki, A.
Maciejewski, H.
Jesionowski, T.
Powiązania:
https://bibliotekanauki.pl/articles/110452.pdf
Data publikacji:
2015
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
hydroxyapatite
enzyme immobilization
protease
physicochemical characteristic
Opis:
Hydroxyapatite is used as a matrix for immobilization of protease from Aspergillus oryzae by a process of adsorption. The matrix obtained has the surface area of 26 m2/g and particles in the shape of flakes of diameters no greater than 650 nm. The efficiency of the proposed method was confirmed by the Fourier transform infrared spectroscopy, elemental analysis and by analysis of parameters of the pore structure of matrix and products after immobilization. On the basis of the Bradford method it was found that the greatest amount of enzyme (132 mg/g) was immobilized from a solution of initial enzyme concentration of 7 mg/cm3 after 24 h of the process.
Źródło:
Physicochemical Problems of Mineral Processing; 2015, 51, 2; 633-646
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A novel alkaline protease from wild edible mushroom Termitomyces albuminosus
Autorzy:
Zheng, Suyue
Wang, Hexiang
Zhang, Guoqing
Powiązania:
https://bibliotekanauki.pl/articles/1039935.pdf
Data publikacji:
2011
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
alkaline protease
mushroom
Termitomyces albuminosus
purification
Opis:
A protease with a molecular mass of 30 kDa and the N-terminal sequence of GLQTNAPWGLARSS, was isolated from fresh fruiting bodies of the wild edible mushroom Termitomyces albuminosus. The purification protocol included ion exchange chromatography on DEAE-cellulose, Q-Sepharose, SP-Sepharose and FPLC-gel filtration on Superdex 75. The protein was unadsorbed on DEAE-cellulose and Q-Sepharose, but adsorbed on SP-Sepharose. The optimal pH and temperature of the purified enzyme were 10.6 and 60 °C, respectively. The enzyme was stable in the presence of 2 % (v/v) Tween 80 and 4 M urea. More than 80 % of the enzyme activity was retained in 2 % (v/v) Triton X 100, 54 % in 10 mM EDTA and 31 % in 2 % (w/v) SDS. The enzyme was strongly inhibited by phenylmethylsulfonyl fluoride (PMSF), but not inhibited by dithiothreitol (DTT), pepstatin or lima bean trypsin inhibitor suggesting that it was a serine protease but not a trypsin-like one. The protease was inhibited by Hg2+, Cu2+, and Fe3+ ions. The Km and Vmax values of the purified enzyme for casein were 8.26 mg ∙ ml-1 and 0.668 mg ∙ ml-1 ∙ min-1, respectively.
Źródło:
Acta Biochimica Polonica; 2011, 58, 2; 269-274
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Purification and characterization of a novel metalloprotease from fruiting bodies of Oudemansiella radicata
Autorzy:
Geng, Xueran
Te, Rigen
Tian, Guoting
Zhao, Yongchang
Zhao, Liyan
Wang, Hexiang
Ng, Tzi
Powiązania:
https://bibliotekanauki.pl/articles/1038592.pdf
Data publikacji:
2017
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
edible mushroom
Oudemansiella radicata
protease
purification
Opis:
In this study, a 39-kDa metalloprotease was purified from a rare edible mushroom with health-promoting activities, Oudemansiella radicata, using a purification protocol which entailed anion exchange chromatography on DEAE-cellulose and Q-Sepharose columns and gel filtration by fast protein liquid chromatography on a Superdex 75 column. Some peptide sequences were obtained by LC-MS/MS analysis and one of the sequences, DAWIQADVNR, manifested 90% identity to Coprinopsis cinerea metalloprotease. The optimal reaction pH and temperature for Oudemansiella radicata protease were pH 7.0 and 50°C, respectively. The protease was purified 79-fold and demonstrated a specific protease activity of 2.42 U/mg. The Km of the purified protease for the casein substrate was 0.65 mg/mL at pH 7.0 and 50°C. The activity of the protease was inhibited by Cd2+, Hg2+, Cu2+, Pb2+ and Fe3+ ions, but was enhanced by K+, Mn2+ and Fe2+ ions. The marked suppression of the protease activity by EDTA indicates that the protease is a metalloprotease.
Źródło:
Acta Biochimica Polonica; 2017, 64, 3; 477-483
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Defense against own arms: staphylococcal cysteine proteases and their inhibitors.
Autorzy:
Dubin, Grzegorz
Powiązania:
https://bibliotekanauki.pl/articles/1043443.pdf
Data publikacji:
2003
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
staphostatin
staphylococcus
ssp
proteinase
protease inhibitor
staphopain
Opis:
Staphylococcus aureus is a human pathogen causing a wide range of diseases. Most staphylococcal infections, unlike those caused by other bacteria are not toxigenic and very little is known about their pathogenesis. It has been proposed that a core of secreted proteins common to many infectious strains is responsible for colonization and infection. Among those proteins several proteases are present and over the years many different functions in the infection process have been attributed to them. However, little direct, in vivo data has been presented. Two cysteine proteases, staphopain A (ScpA) and staphopain B (SspB) are important members of this group of enzymes. Recently, two cysteine protease inhibitors, staphostatin A and staphostatin B (ScpB and SspC, respectively) were described in S. aureus shedding new light on the complexity of the processes involving the two proteases. The scope of this review is to summarize current knowledge on the network of staphylococcal cysteine proteases and their inhibitors in view of their possible role as virulence factors.
Źródło:
Acta Biochimica Polonica; 2003, 50, 3; 715-724
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Functional conservation between yeast and plant mitochondrial m-AAA proteases
Autorzy:
Skibior, R.
Kolodziejczak, M.
Janska, H.
Powiązania:
https://bibliotekanauki.pl/articles/80313.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
conference
FtsH protease
bifunctional enzyme
ATPase
plant mitochondrion
yeast
AAA protease
Arabidopsis
ribosomal subunit
immunoblotting
biogenesis
Źródło:
BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology; 2013, 94, 3
0860-7796
Pojawia się w:
BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The regulatory role of AtDeg5 chloroplast protease in chronological progression of principal growth stages in Arabidopsis thaliana plants
Autorzy:
Baranek, M.
Lucinski, R.
Jackowski, G.
Powiązania:
https://bibliotekanauki.pl/articles/80598.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
conference
serine-type protease
chymotrypsin
thylakoid membrane
photosystem II
protease
chloroplast
Arabidopsis thaliana
ontogenesis
growth stage
Źródło:
BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology; 2013, 94, 3
0860-7796
Pojawia się w:
BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Downregulation of chloroplast protease AtDeg5 leads to changes in chronological progression of ontogenetic stages, leaf morphology and chloroplast ultrastructure in Arabidopsis
Autorzy:
Baranek, M.
Wyka, T.P.
Jackowski, G.
Powiązania:
https://bibliotekanauki.pl/articles/57852.pdf
Data publikacji:
2015
Wydawca:
Polskie Towarzystwo Botaniczne
Tematy:
chloroplast protease
AtDeg5 protease
chronological progression
ontogenetic stage
leaf morphology
chloroplast ultrastructure
Arabidopsis
starch grain
Opis:
The chloroplast protein AtDeg5 is a serine-type protease peripherally attached to thylakoid membrane at its lumenal side. Since reliable data regarding the role of AtDeg5 in controlling the course of growth and developmental processes are extremely limited, two independent T-DNA insertional lines with different extent of AtDeg5 reduction were prepared and ontogenesis stage-based analysis performed. Both mutant lines displayed a compensatory overaccumulation of AtDeg8. The repression of AtDeg5 protease altered a range of phenotypic features in at least one of the mutants, with the most prominent being changes in chronological progression of development and growth of individual rosette leaves, flower production and silique ripening as well as in the area of fully expanded leaves and chloroplast ultrastructure. By analyzing the results of parallel-mutant screening we conclude that AtDeg8 overdose may rescue 23% of AtDeg5 deficiency with regard to some AtDeg5-controlled traits; alternatively AtDeg5 may have catalytic sites in excess so that these traits might remain unaltered when AtDeg5 pool is reduced by 23%. For some other AtDeg5-dependent traits the absence of excessive amount of AtDeg5 catalytic sites, lack of AtDeg5 dosage effect and inability of AtDeg8 to compensate deficiency or absence of AtDeg5 occurred.
Źródło:
Acta Societatis Botanicorum Poloniae; 2015, 84, 1
0001-6977
2083-9480
Pojawia się w:
Acta Societatis Botanicorum Poloniae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
In silico studies of selected xanthophylls as potential candidates against SARS-CoV-2 targeting main protease (Mpro) and papain-like protease (PLpro)
Autorzy:
Karpiński, T.M.
Kwaśniewski, M.
Ożarowski, M.
Alam, R.
Powiązania:
https://bibliotekanauki.pl/articles/2049355.pdf
Data publikacji:
2021
Wydawca:
Instytut Włókien Naturalnych i Roślin Zielarskich
Tematy:
protease
papain-like protease
xanthophyll
coronavirus
COVID-19
antiviral activity
koronawirus
pandemia
działanie przeciwwirusowe
projektowanie leków wspomagane komputerowo
Opis:
Introduction: The main protease (Mpro) and the papain-like protease (PLpro) are essential for the replication of SARS-CoV-2. Both proteases can be targets for drugs acting against SARS-CoV-2. Objective: This paper aims to investigate the in silico activity of nine xanthophylls as inhibitors of Mpro and PLpro. Methods: The structures of Mpro (PDB-ID: 6LU7) and PLpro (PDB-ID: 6W9C) were obtained from RCSB Protein Data Bank and developed with BIOVIA Discovery Studio. Active sites of proteins were performed using CASTp. For docking the PyRx was used. Pharmacokinetic parameters of ADMET were evaluated using SwissADME and pkCSM. Results: β-cryptoxanthin exhibited the highest binding energy: –7.4 kcal/mol in the active site of Mpro. In PLpro active site, the highest binding energy had canthaxanthin of –9.4 kcal/mol, astaxanthin –9.3 kcal/mol, flavoxanthin –9.2 kcal/mol and violaxanthin –9.2 kcal/mol. ADMET studies presented lower toxicity of xanthophylls in comparison to ritonavir and ivermectin. Conclusion: Our findings suggest that xanthophylls can be used as potential inhibitors against SARS-CoV-2 main protease and papain-like protease.
Źródło:
Herba Polonica; 2021, 67, 2; 1-8
0018-0599
Pojawia się w:
Herba Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The total protein content, protein fractions and proteases activities of drone prepupae of Apis mellifera due to varrosis
Autorzy:
Żółtowska, K.
Lipiński, Z.
Dmitryjuk, M.
Powiązania:
https://bibliotekanauki.pl/articles/2146371.pdf
Data publikacji:
2005
Wydawca:
Polskie Towarzystwo Parazytologiczne
Tematy:
protease
protease activity
honey bee
drone prepupa
protein fraction
varrosis
total protein
Varroa destructor
Apis mellifera
protein content
Opis:
The proteins level and activities of acid and alkaline proteases in whole body extracts of drone prepupae of Apis mellifera naturaly infested with Varroa destructor were studied. The infested and a non-infested group did not differ significantly in their total protein content. However, some differences in protein profiles were found. A lack of three protein fractions of moderate and lower molecular weight in infested prepupae was noted. Moreover, some differences in the quantity of protein in most of the fractions were observed. The activity of acid proteases from infested prepupae was lower (p < 0.05) compared with the activity of these proteases from the non-infested one group. The infested drone had higher activity of alkaline proteases than non-infested but this difference was not statisticaly significant.
Źródło:
Wiadomości Parazytologiczne; 2005, 51, 1; 43-47
0043-5163
Pojawia się w:
Wiadomości Parazytologiczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The total protein content, protein fractions and proteases activities of drone prepupae of Apis mellifera due to varrosis
Autorzy:
Zoltowska, K
Lipinski, Z.
Dmitryjuk, M.
Powiązania:
https://bibliotekanauki.pl/articles/840749.pdf
Data publikacji:
2005
Wydawca:
Polskie Towarzystwo Parazytologiczne
Tematy:
protease
protease activity
honey bee
drone prepupa
protein fraction
varrosis
total protein
Varroa destructor
Apis mellifera
protein content
Opis:
The proteins level and activities of acid and alkaline proteases in whole body extracts of drone prepupae of Apis mellifera naturaly infested with Varroa destructor were studied. The infested and a non-infested group did not differ significantly in their total protein content. However, some differences in protein profiles were found. A lack of three protein fractions of moderate and lower molecular weight in infested prepupae was noted. Moreover, some differences in the quantity of protein in most of the fractions were observed. The activity of acid proteases from infested prepupae was lower (p < 0.05) compared with the activity of these proteases from the non-infested one group. The infested drone had higher activity of alkaline proteases than non-infested but this difference was not statisticaly significant.
Źródło:
Annals of Parasitology; 2005, 51, 1
0043-5163
Pojawia się w:
Annals of Parasitology
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 49

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