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Wyszukujesz frazę "Glycosylation" wg kryterium: Temat


Tytuł:
Study of concentration of advanced protein glycation products in pregnant women with physiological pregnancy and pregnancy complicated with pre-eclampsia
Czy AGEs mogą być markerami stanu przedrzucawkowego? Badanie stężenia zaawansowanych produktów glikacji białek u kobiet ciężarnych z ciążą fizjologiczną i ciążą powikłaną stanem przedrzucawkowym
Autorzy:
Bodzek, Piotr
Janosz, Iwona
Damasiewicz-Bodzek, Aleksandra
Witek, Łukasz
Olejek, Anita
Powiązania:
https://bibliotekanauki.pl/articles/2130135.pdf
Data publikacji:
2022-10-12
Wydawca:
Śląski Uniwersytet Medyczny w Katowicach
Tematy:
AGEs
pregnancy
pre-eclampsia
non-enzymatic glycosylation
advanced glycation end products
ciąża
stan przedrzucawkowy
nieenzymatyczna glikozylacja
zaawansowane produkty glikacji białek
Opis:
INTRODUCTION: The role of advanced glycation end products (AGEs) in the pathomechanism of arterial hypertension has been demonstrated, but little information is available on the influence of AGEs on the course of pre-eclampsia (PE). The aim of the study was to assess the concentration profile of advanced protein glycation products in pregnant women diagnosed with PE. MATERIAL AND METHODS: The concentrations of AGEs, carboxymethyllysine (CML), carboxyethyllysine (CEL) and methylglyoxal (MG) in the sera of female respondents were determined using the enzyme immunoassay method. RESULTS: The levels of AGE and CML were lower in the group of women with PE compared to the group of non- -pregnant women (p = 0.0411 and p = 0.0072). A lower CML concentration was found in healthy pregnant women as compared to healthy non-pregnant women (p = 0.00068). Positive correlations were found between AGE and CML levels in women with PE (R = 0.339, p = 0.032) and between CML and CEL in healthy non-pregnant women (R = 0.447, p = 0.012). CONCLUSIONS:We suggest that there is a decrease in the intensity of non-enzymatic protein glycation during pregnancy. Moreover, our study indicates that isolated PE may be associated with a different pathomechanism than chronic hypertension, and therefore AGEs cannot be at present considered a marker of PE.
WSTĘP: Rola końcowych produktów zaawansowanejglikacji (advanced glycation end products – AGEs) w patomechanizmie nadciśnienia tętniczego została udowodniona, jednak niewiele jest informacji na temat wpływu AGEs na prze-bieg stanu przedrzucawkowego (pre-eclampsia – PE). Celem pracy była ocena profilu stężeń zaawansowanych produktów glikacji białek u kobiet ciężarnych z rozpoznaniem PE. MATERIAŁ I METODY: Oznaczenia stężeń AGEs, karboksymetylolizyny (carboxymethyllysine – CML), karboksyetylolizyny (carboxyethyllysine – CEL) i metyloglioksalu (methylglyoxal – MG) w surowicy badanych kobiet wykonano metodą immunoenzymatyczną. WYNIKI: Stężenia AGE i CML były niższe w grupie kobiet z PE w porównaniu z grupą kobiet nieciężarnych (p = 0,0411 i p = 0,0072). Stwierdzono niższe stężenie CML u zdrowych ciężarnych w porównaniu ze zdrowymi nieciężarnymi (p = 0,00068). Stwierdzono dodatnie korelacje pomiędzy stężeniem AGE i CML u kobiet z PE (R = 0,339, p = 0,032) oraz pomiędzy CML i CEL u zdrowych kobiet nieciężarnych (R = 0,447, p = 0,012). WNIOSKI: Sugerujemy, że w czasie ciąży dochodzi do zmniejszenia intensywności nieenzymatycznej glikacji białek. Ponadto nasze badanie wskazuje, że izolowane PE może być związane z innym patomechanizmem niż przewlekłe nadciśnienie tętnicze i dlatego AGEs nie mogą być obecnie uważane za marker PE.
Źródło:
Annales Academiae Medicae Silesiensis; 2022, 76; 106-111
1734-025X
Pojawia się w:
Annales Academiae Medicae Silesiensis
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Glycosylation of immune system proteins and its role in autoimmune diseases and cancer
Autorzy:
Trzyna, Anna
Tabarkiewicz, Jacek
Mazur, Artur
Powiązania:
https://bibliotekanauki.pl/articles/1597351.pdf
Data publikacji:
2020-03-30
Wydawca:
Uniwersytet Rzeszowski. Wydawnictwo Uniwersytetu Rzeszowskiego
Tematy:
Glycosylation
Immunity
Cellular
Humoral
Autoimmune Diseases
Opis:
Introduction. Structural glycans have great biological significance and are involved in signaling and cell communication of the immune system. They are attached to proteins and lipids in an enzymatic process called glycosylation where glycosyltransferase and glycosidases bind sugar residues and lead to the formation of bioconjugates. Aim. In this paper we describe the importance of glycosylation in the immune system and its changes in diseases. Material and methods. This review was performed according to systematic literature search of major bibliographic databases. Results. Proper glycosylation ensures the functioning of the organism, however, defects in structural glycans of immune system changes their properties and can lead to disorders and further to autoimmune diseases. It has been also proven that glycosylation of autoimmune system is changed during cancer. In this paper we described types of structural glycans, significance of glycosylation of selected components of the immune system and its modifications in disorders. Conclusions. Knowledge about changes in the glycosylation in diseases is the key to understanding the processes of autoimmune diseases and may allow the development of new treatments in the future.
Źródło:
European Journal of Clinical and Experimental Medicine; 2020, 1; 32-37
2544-2406
2544-1361
Pojawia się w:
European Journal of Clinical and Experimental Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
New insight into organic anion transporters from the perspective of potentially important interactions and drugs toxicity
Autorzy:
Mor, A.L.
Kaminski, T.W.
Karbowska, M.
Pawlak, D.
Powiązania:
https://bibliotekanauki.pl/articles/70038.pdf
Data publikacji:
2018
Wydawca:
Polskie Towarzystwo Fizjologiczne
Tematy:
organic anion transporter
transmembrane transporter
drug-drug interaction
central nervous system
glycosylation
herbal preparation
dietary supplement
pharmacokinetic interaction
Źródło:
Journal of Physiology and Pharmacology; 2018, 69, 3
0867-5910
Pojawia się w:
Journal of Physiology and Pharmacology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Changes of the expression of Lewis blood group antigens in glycoproteins of renal cancer tissues
Autorzy:
Borzym-Kluczyk, Małgorzata
Radziejewska, Iwona
Powiązania:
https://bibliotekanauki.pl/articles/1039579.pdf
Data publikacji:
2013
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
ELISA
sialyl Lewisa/x
glycosylation
renal cancer
Opis:
Sialic acid and sialyl Lewisa/x are found on N- and O-glycans of many human malignant cells. Carbohydrate antigens can be used as tumor markers, and an increase of their levels in cancer cells is associated with tumor progression. The aim of this study was to assess the level of some Lewis blood group antigens on glycoproteins in tumor (cancer tissue), intermediate zone (adjacent to tumor tissue), and normal renal cortex/medulla (uninvolved by tumor). The study was performed on tissues taken from 30 patients. Relative amounts of sugar structures of proteins with molecular masses above 30 kDa were determined by ELISA-like test with biotinylated lectins: MAA (Maackia amurensis), SNA (Sambucus nigra), and monoclonal antibodies anti-sialyl Lewisa/x.. Higher expression of all examined structures was revealed in cancer tissues. Significant increases were observed for sialic acid linked α 2-3 in cancer tissues when compared to healthy ones and also among intermediate and healthy tissues. The sialic acid linked α 2-6 and sialyl Lewisx structures were significantly increased in cancerous cells when compared to normal and intermediate renal tissue. In case of sialyl Lewisa antigen, a significant difference was discovered between normal and intermediate tissue. Our results confirm that the examined Lewis antigens can be involved in tumor development. Their increase in cancer tissues can suggest their specific role in the process.
Źródło:
Acta Biochimica Polonica; 2013, 60, 2; 223-226
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Congenital disorders of glycosylation. Part I. Defects of protein N-glycosylation
Autorzy:
Cylwik, Bogdan
Naklicki, Marcin
Chrostek, Lech
Gruszewska, Ewa
Powiązania:
https://bibliotekanauki.pl/articles/1039567.pdf
Data publikacji:
2013
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
N-glycosylation
genetic defects
diagnostics
Opis:
Glycosylation is the most common chemical process of protein modification and occurs in every living cell. Disturbances of this process may be either congenital or acquired. Congenital disorders of glycosylation (CDG) are a rapidly growing disease family, with about 50 disorders reported since its first clinical description in 1980. Most of the human diseases have been discovered recently. CDG result from defects in the synthesis of the N- and O-glycans moiety of glycoproteins, and in the attachment to the polypeptide chain of proteins. These defects have been found in the activation, presentation, and transport of sugar precursors, in the enzymes responsible for glycosylation, and in proteins that control the traffic of component. There are two main types of protein glycosylation: N-glycosylation and O-glycosylation. Most diseases are due to defects in the N-glycosylation pathway. For the sake of convenience, CDG were divided into 2 types, type I and II. CDG can affect nearly all organs and systems. The considerable variability of clinical features makes it difficult to recognize patients with CDG. Diagnosis can be made on the basis of abnormal glycosylation display. In this paper, an overview of CDG with a new nomenclature limited to the group of protein N-glycosylation disorders, clinical phenotype and diagnostic approach, have been presented. The location, reasons for defects, and the number of cases have been also described. This publication aims to draw attention to the possibility of occurrence of CDG in each multisystem disorder with an unknown origin.
Źródło:
Acta Biochimica Polonica; 2013, 60, 2; 151-161
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Congenital disorders of glycosylation. Part II. Defects of protein O-glycosylation
Autorzy:
Cylwik, Bogdan
Lipartowska, Karina
Chrostek, Lech
Gruszewska, Ewa
Powiązania:
https://bibliotekanauki.pl/articles/1039531.pdf
Data publikacji:
2013
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
O-glycosylation
genetic defects
diagnostics
Opis:
Glycosylation is a form of post-translational modification of proteins and occurs in every living cell. The carbohydrate chains attached to the proteins serve various functions. There are two main types of protein glycosylation: N-glycosylation and O-glycosylation. In this paper, we describe the O-glycosylation process and currently known congenital disorders of glycosylation associated with defects of protein O-glycosylation. This process takes place in the cis Golgi apparatus after N-glycosylation and folding of the proteins. The O-glycosylation is essential in the biosynthesis of mucins, the formation of proteoglycan core proteins and blood group proteins. Most common forms of O-glycans are the mucin-type glycans. There are more than 20 known disorders related to O-glycosylation disturbances. We review 8 of the following diseases linked to defects in the synthesis of O-xylosylglycans, O-N acetylgalactosaminylglycans, O-xylosyl/N-acetylglycans, O-mannosylglycans, and O-fucosylglycans: multiple exostoses, progeroid variant of Ehlers-Danlos syndrome, progeria, familial tumoral calcinosis, Schneckenbecken dysplasia, Walker-Warburg syndrome, spondylocostal dysostosis type 3, and Peter's plus syndrome. Causes of these diseases include gene mutations and deficiency of proteins (enzymes). Their diagnosis includes syndromic presentation, organ-specific expression and laboratory findings.
Źródło:
Acta Biochimica Polonica; 2013, 60, 3; 361-368
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Inhibitors of N-glycosylation as a potential tool for analysis of the mechanism of action and cellular localisation of glycoprotein P
Autorzy:
Wojtowicz, Karolina
Szaflarski, Witold
Januchowski, Radosław
Zawierucha, Piotr
Nowicki, Michał
Zabel, Maciej
Powiązania:
https://bibliotekanauki.pl/articles/1039626.pdf
Data publikacji:
2012
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
N-glycosylation
glycoprotein P
multidrug resistance
inhibitors
Opis:
Multidrug resistance has for many years attracted attention of numerous investigators. Attempts have also been made to increase efficiency of anti-neoplastic therapy. For this reason, most of efforts have been devoted to analysing proteins engaged in the mechanism of multidrug resistance such as the N-glycosylated membrane protein glycoprotein P. Interestingly, glycosylation probably plays a significant role in the intracellular location and activity of modified proteins. Inhibitors of glycosylation have been demonstrated to alter the activity of glycoprotein P in various ways, depending on the cell line examined. These inhibitors markedly reduce multidrug resistance of cancer cells, thus promoting success of anti-neoplastic therapy. Here, we review the basic knowledge on N-glycosylation inhibitors, their effect on glycoprotein P and their therapeutic potential.
Źródło:
Acta Biochimica Polonica; 2012, 59, 4; 445-450
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Distinct expression, localization and function of two Rab7 proteins encoded by paralogous genes in a free-living model eukaryote
Autorzy:
Osińska, Magdalena
Wiejak, Jolanta
Wypych, Emilia
Bilski, Henryk
Bartosiewicz, Rafał
Wyroba, Elżbieta
Powiązania:
https://bibliotekanauki.pl/articles/1039860.pdf
Data publikacji:
2011
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
glycosylation
antipeptide antibodies
Real-Time PCR
Rab7 isotypes
RNAi
2D electrophoresis
Paramecium octaurelia
STED
Opis:
Rab7 GTPases are involved in membrane trafficking in the late endosomal/lysosomal pathway. In Paramecium octaurelia Rab7a and Rab7b are encoded by paralogous genes. Antipeptide antibodies generated against divergent C-termini recognize Rab7a of 22.5 kDa and Rab7b of 25 kDa, respectively. In 2D gel electrophoresis two immunoreactive spots were identified for Rab7b at pI about 6.34 and about 6.18 and only one spot for Rab7a of pI about 6.34 suggesting post-translational modification of Rab7b. Mass spectrometry revealed eight identical phosphorylated residues in the both proteins. ProQ Emerald staining and ConA overlay of immunoprecipitated Rab7b indicated its putative glycosylation that was further supported by a faster electrophoretic mobility of this protein upon deglycosylation. Such a post-translational modification and substitution of Ala140 in Rab7a for Ser140 in Rab7b may result in distinct targeting to the oral apparatus where Rab7b associates with the microtubular structures as revealed by STED confocal and electron microscopy. Rab7a was mapped to phagosomal compartment. Absolute qReal-Time PCR analysis revealed that expression of Rab7a was 2.6-fold higher than that of Rab7b. Upon latex internalization it was further 2-fold increased for Rab7a and only slightly for Rab7b. Post-transcriptional gene silencing of rab7a suppressed phagosome formation by 70 % and impaired their acidification. Ultrastructural analysis with double immunogold labeling revealed that this effect was due to the lack of V-ATPase recruitment to phagolysosomes. No significant phenotype changes were noticed in cells upon rab7b silencing. In conclusion, Rab7b acquired a new function, whereas Rab7a can be assigned to the phagolysosomal pathway.
Źródło:
Acta Biochimica Polonica; 2011, 58, 4; 597-607
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of recombinant Duffy protein-linked N-glycans using lectins and glycosidases
Autorzy:
Grodecka, Magdalena
Czerwiński, Marcin
Duk, Maria
Lisowska, Elwira
Waśniowska, Kazimiera
Powiązania:
https://bibliotekanauki.pl/articles/1040421.pdf
Data publikacji:
2010
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
Duffy antigen
chemokine receptor
chemokines
N-glycosylation
lectins
Opis:
Duffy antigen is a glycosylated blood group protein acting as a malarial and chemokine receptor. Using glycosylation mutants we have previously demonstrated, that all three potential glycosylation sites of the Duffy antigen are occupied by N-linked oligosaccharide chains. In this study, wild-type Duffy glycoprotein and three mutants, each containing a single N-glycan, were used to characterize the oligosaccharide chains by lectin blotting and endoglycosidase digestion. The positive reaction of all the recombinant Duffy forms with Datura stramonium and Sambucus nigra lectins showed that each Duffy N-linked glycan contains Galβ1-4GlcNAc units terminated by (α2-6)-linked sialic acid residues, typical of complex oligosaccharides. The reactivity with Aleuria aurantia and Lens culinaris lectins suggested the presence of (α1-6)-linked fucose at the N-glycan chitobiose core. The failure of the Galanthus nivalis and Canavalia ensiformis lectins to bind to any of the Duffy mutants or to the wild-type antigen indicated that none of the three Duffy N-glycosylation sites carries detectable levels of high-mannose oligosaccharide chains. Digestion of Duffy samples with peptide N-glycosidase F and endoglycosidase H confirmed the presence of N-linked complex oligosaccharides. Our results indicate that Duffy antigen N-glycans are mostly core-fucosylated complex type oligosaccharides rich in N-acetyllactosamine and terminated by (α2-6)-linked sialic acid residues.
Źródło:
Acta Biochimica Polonica; 2010, 57, 1; 49-53
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of tunicamycin on the biogenesis of hepatitis C virus glycoproteins
Autorzy:
Reszka, Natalia
Krol, Ewelina
Patel, Arvind
Szewczyk, Boguslaw
Powiązania:
https://bibliotekanauki.pl/articles/1040320.pdf
Data publikacji:
2010
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
glycoproteins
glycosylation inhibition
hepatitis C virus
tunicamycin
Opis:
Hepatitis C virus (HCV) infects humans, with a prevalence around 3% of population, causing acute and chronic hepatitis and hepatocellular carcinoma. We studied the effect of inhibition of glycosylation on the assembly of the HCV particle. HCV possesses two envelope glycoproteins E1 and E2 that are highly modified by N-glycans. These glycan residues are crucial for viral entry and maturation of the progeny. Here, we examined the influence of inhibition of N-glycosylation on expression of E1 and E2. Since the propagation of HCV in cell culture is limited, we used a recombinant baculovirus producing viral-like particles in insect cells. Our data showed that blocking of N-glycan transfer to the nascent polypeptide chain with the antibiotic tunicamycin resulted in the loss of E1 and E2. We also found that a dose of tunicamycin that did not influence the cell viability significantly reduced the E2 level in infected cells. The results indicate that blocking of glycosylation at an early step efficiently reduces the assembly of HCV virions. Thus, we suggest that derivatives of tunicamycin that preferentially block glycosylation of viral proteins may become potential therapeutic agents against HCV.
Źródło:
Acta Biochimica Polonica; 2010, 57, 4; 541-546
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of α3β1 and αvβ3 integrin glycosylation on interaction of melanoma cells with vitronectin
Autorzy:
Janik, Marcelina
Przybyło, Małgorzata
Pocheć, Ewa
Pokrywka, Małgorzata
Lityńska, Anna
Powiązania:
https://bibliotekanauki.pl/articles/1040422.pdf
Data publikacji:
2010
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
adhesion
integrin
glycosylation
migration
vitronectin
Opis:
The metastatic transformation of melanocytes is associated with altered expression of adhesion molecules, including αvβ3 and α3β1 integrins. Integrin αvβ3 is a primary vitronectin (VN) receptor, while both integrin types take part in adhesion to VN when they are in complex with uPAR. Although their role in melanoma cell interaction with VN is of great interest, the influence of N-oligosaccharides attached to these glycoproteins is still unappreciated. The present study assesses the role of αvβ3 and α3β1 integrins and the influence of their glycosylation status on WM9 and WM239 metastatic melanoma cell interactions with VN. Cell adhesion to and migration on VN were selected as the studied cell behaviour parameters. Functionblocking antibodies and swainsonine (SW) treatment were used in these tests. Both cell lines interacted with VN in an integrin-mediated but cell-line-specific manner. In WM9 cells, migration was not completely inhibited by antibodies against α3β1 or αvβ3 integrins, suggesting the participation of other VN receptors. In both cell lines in coprecipitation test the formation of an integrins/uPAR complex was shown. In the presence of SW formation of the complex did not occur, suggesting the participation of glycosylation in this proccess. Additionally, the adhesion properties of WM9 cells were changed after SW treatment. Our results suggest that in these two metastatic cell lines integrin-linked N-oligosaccharides influence the VN adhesion receptor activity and function.
Źródło:
Acta Biochimica Polonica; 2010, 57, 1; 55-61
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Alterations in protein secretion caused by metabolic engineering of glycosylation pathways in fungi
Autorzy:
Kruszewska, Joanna
Perlińska-Lenart, Urszula
Górka-Nieć, Wioletta
Orłowski, Jacek
Zembek, Patrycja
Palamarczyk, Grażyna
Powiązania:
https://bibliotekanauki.pl/articles/1040697.pdf
Data publikacji:
2008
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
glycosylation
protein secretion
Trichoderma
Opis:
Due to its natural properties, Trichoderma reesei is commonly used in industry-scale production of secretory proteins. Since almost all secreted proteins are O-glycosylated, modulation of the activity of enzymes of the O-glycosylation pathway are likely to affect protein production and secretion or change the glycosylation pattern of the secreted proteins, altering their stability and biological activity. Understanding how the activation of different components of the O-glycosylation pathway influences the glycosylation pattern of proteins and their production and secretion could help in elucidating the mechanism of the regulation of these processes and should facilitate creation of engineered microorganisms producing high amounts of useful proteins. In this review we focus on data concerning Trichoderma, but also present some background information allowing comparison with other fungal species.
Źródło:
Acta Biochimica Polonica; 2008, 55, 3; 447-456
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Disruption of Trichoderma reesei gene encoding protein O-mannosyltransferase I results in a decrease of the enzyme activity and alteration of cell wall composition
Autorzy:
Górka-Nieć, Wioletta
Pniewski, Michał
Kania, Anna
Perlińska-Lenart, Urszula
Palamarczyk, Grażyna
Kruszewska, Joanna
Powiązania:
https://bibliotekanauki.pl/articles/1040737.pdf
Data publikacji:
2008
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
Trichoderma reesei
pmt1 gene disruption
protein glycosylation
cell wall composition
Opis:
In fungi transfer of the first mannosyl residue to proteins during their O-glycosylation is catalyzed by protein O-mannosyltransferases encoded by pmt genes. Disruption of the pmt1 gene in Trichoderma caused a significant decrease in the total activity of protein O-mannosyltransferases. Moreover, disruption of the pmt1 gene also led to osmotic sensitivity of the strain, indicating an essential role of the PMTI protein activity for cell wall synthesis. At the same time, the strain was defective in septa formation, producing only half the number of septa per unit length of hypha compared with the wild type. Disruption of the pmt1 gene decreased protein secretion but had no effect on glycosylation of secreted proteins, which suggests that PMTI protein O-mannosyltranferase does not take part in glycosylation of these proteins.
Źródło:
Acta Biochimica Polonica; 2008, 55, 2; 251-259
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of individual azurocidin N-glycosylation sites in regard to its secretion by insect cells, susceptibility to proteolysis and antibacterial activity
Autorzy:
Indyk, Katarzyna
Olczak, Teresa
Ciuraszkiewicz, Justyna
Wątorek, Wiesław
Olczak, Mariusz
Powiązania:
https://bibliotekanauki.pl/articles/1041040.pdf
Data publikacji:
2007
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
glycosylation
protein secretion
azurocidin
antimicrobial activity
Opis:
Azurocidin is an inactive serine protease homolog with primary sequence similarity to neutrophil elastase, cathepsin G, and proteinase 3. The aim of this study was to investigate possible consequences of differential glycosylation of azurocidin in regard to its secretion, protein stability as measured by susceptibility to proteolysis, and antibacterial activity. Site-directed mutagenesis was employed to generate mutant azurocidin variants lacking individual N-glycosylation sites. Our results show that N-linked glycans may play a role in proper azurocidin folding and subsequent secretion by insect cells. We also demonstrate that N-linked glycosylation contributes to azurocidin stability by protecting it from proteolysis. The lack of N-glycosylation at individual sites does not significantly influence the azurocidin antibacterial activity.
Źródło:
Acta Biochimica Polonica; 2007, 54, 3; 567-573
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparison of the localization and post-translational modification of Campylobacter coli CjaC and its homolog from Campylobacter jejuni, Cj0734c/HisJ
Autorzy:
Wyszyńska, Agnieszka
Tomczyk, Karolina
Jagusztyn-Krynicka, Elżbieta
Powiązania:
https://bibliotekanauki.pl/articles/1041127.pdf
Data publikacji:
2007
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
glycosylation
Campylobacter
protein localization
Opis:
Campylobacter is an asaccharolytic microorganism which uses amino acids as a source of carbon and energy. CjaC/HisJ is a ligand-binding protein, a component of the ABC transport system. Campylobacter CjaC/HisJ is post-translationally modified by glycosylation. The number of glycosylation motifs present in the CjaC protein is species-specific. C. coli CjaC has two and C. jejuni one motif (E/DXNYS/T) which serves as a glycan acceptor. Although the two C. coli CjaC motifs have identical amino-acid sequences they are not glycosylated with the same efficiency. The efficacy of CjaC glycosylation in Escherichia coli containing the Campylobacter pgl locus is also rather low compared to that observed in the native host. The CjaC localization is host-dependent. Despite being a lipoprotein, CjaC is recovered in E. coli from the periplasmic space whereas in Campylobacter it is anchored to the inner membrane.
Źródło:
Acta Biochimica Polonica; 2007, 54, 1; 143-150
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł

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