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Wyświetlanie 1-15 z 29
Tytuł:
Lack of correlation between X region spa polymorphism and virulence of methicillin resistant and methicillin sensitive Staphylococcus aureus strains
Autorzy:
Kurlenda, Julianna
Grinholc, Mariusz
Szweda, Piotr
Powiązania:
https://bibliotekanauki.pl/articles/1040442.pdf
Data publikacji:
2010
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
polymorphism
protein A
spa
virulence
Opis:
Staphylococcus aureus is an etiological factor of severe infections in both hospital and ambulatory environments. As methicillin resistant Staphylococcus aureus strains spread quickly across healthcare centers resulting in life-threatening infections with increased mortality, they are considered more virulent than MSSA strains. Protein A, encoded by the spa gene, is one of the virulence factors involved in the staphylococcal pathogenesis. It has been suggested that the number of 24-bp tandem repeat units along the X region of the spa gene correlates with the virulence level of the strains. The current work analyzed the relationships between the virulence of MRSA and MSSA strains with region X polymorphism. No obvious correlation was observed.
Źródło:
Acta Biochimica Polonica; 2010, 57, 1; 135-138
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Interaction of maize (Zea mays) protein phosphatase 2A with tubulin
Autorzy:
Awotunde, Olubunmi
Lechward, Katarzyna
Krajewska, Katarzyna
Żołnierowicz, Stanisław
Muszyńska, Grażyna
Powiązania:
https://bibliotekanauki.pl/articles/1043655.pdf
Data publikacji:
2003
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
protein phosphatase 2A
tubulin
protein-protein interaction
plant cytoskeleton organization
maize
Opis:
Immunological and biochemical evidence has been obtained for an interaction of maize protein phosphatase 2A (PP2A) holoenzyme with tubulin. Tubulin co-purifies with maize seedling PP2A. Affinity chromatography of the maize PP2A preparation on immobilized tubulin revealed two peaks of phosphorylase a phosphatase activity. In one of the peaks, the catalytic (C) and constant regulatory (A) subunits of PP2A were identified by Western blotting. The subunits (C and A) of PP2A were co-immunoprecipitated from maize seedlings homogenate by an anti-α-tubulin antibody. The interaction of plant PP2A with tubulin indicates a possible role of reversible protein phosphorylation in the dynamic structure of plant cytoskeleton.
Źródło:
Acta Biochimica Polonica; 2003, 50, 1; 131-138
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Protein phosphatase 2A: Variety of forms and diversity of functions
Autorzy:
Lechward, Katarzyna
Awotunde, Olubunmi
Świątek, Wojciech
Muszyńska, Grażyna
Powiązania:
https://bibliotekanauki.pl/articles/1044037.pdf
Data publikacji:
2001
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
protein phosphatase 2A
signal transduction
protein-protein interactions
reversible phosphorylation
cell cycle
carcinogenesis.
Opis:
Protein phosphatase 2A (PP2A) comprises a diverse family of phosphoserine-and phosphothreonine-specific phosphatases present in all eukaryotic cells. All forms of PP2A contain a catalytic subunit (PP2Ac) which forms a stable complex with the structural subunit PR65/A. The heterodimer PP2Ac-PR65/A associates with regulatory proteins, termed variable subunits, in order to form trimeric holoenzymes attributed with distinct substrate specificity and targeted to different subcellular compartments. PP2Ac activity can be modulated by reversible phosphorylation on Tyr307 and methylation on C-terminal Leu309. Studies on PP2A have shown that this enzyme may be implicated in the regulation of metabolism, transcription, RNA splicing, translation, differentiation, cell cycle, oncogenic transformation and signal transduction.
Źródło:
Acta Biochimica Polonica; 2001, 48, 4; 921-933
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The involvement of protein kinase A in the immune response of Galleria mellonella larvae to bacteria
Autorzy:
Cytryńska, Małgorzata
Zdybicka-Barabas, Agnieszka
Jakubowicz, Teresa
Powiązania:
https://bibliotekanauki.pl/articles/1041132.pdf
Data publikacji:
2007
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
antibacterial activity
protein kinase A
Rp-8-Br-cAMPS
lysozyme
Galleria mellonella
Opis:
The role of protein kinase A (PKA) in the humoral immune response of the greater wax moth Galleria mellonella larvae to live Gram-positive bacteria Micrococcus lysodeikticus and Gram-negative bacteria Escherichia coli was investigated. The immune challenge of larvae with both kinds of bacteria caused an increase in fat body PKA activity depending on the injected bacteria. Gram-positive M. lysodeikticus was a much better inducer of the enzyme activity than Gram-negative E. coli. The PKA activity was increased about 2.5-fold and 1.5-fold, after M. lysodeikticus and E. coli injection, respectively. The in vivo inhibition of the enzyme activity by a cell permeable selective PKA inhibitor, Rp-8-Br-cAMPS, was correlated with considerable changes of fat body lysozyme content and hemolymph antimicrobial activity in bacteria-challenged insects. The kinetics of changes were different and dependent on the bacteria used for the immune challenge of G. mellonella larvae.
Źródło:
Acta Biochimica Polonica; 2007, 54, 1; 167-174
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Molecular docking and pharmacokinetic prediction of phytochemicals from Syzygium cumini in interaction with penicillin-binding protein 2a and erythromycin ribosomal methylase of Staphylococcus aureus
Autorzy:
Shidiki, A.
Vyas, A.
Powiązania:
https://bibliotekanauki.pl/articles/2096259.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
methicillin-resistant S. aureus
penicillin-binding protein 2a
erythromycin ribosomal methylase
Opis:
Background. MRSA and MLSB resistant S. aureus are known as important pathogens, which are responsible for many cases of both hospital and community-acquired infections worldwide. Studying drug discovery from plant sources is regarded as an important prevention strategy regarding these types of infections. Material and methods. Agar well diffusion method was performed for antimicrobial evaluation, LCMS technique used for identification of different compounds, molecular docking performed by application of iGEMDOCK for PBP2a and ERM to plant compounds, and its pharmacokinetic evaluation of ADMET through use of AdmetSAR. Results. Water extract was the most effective against resistant strains of Staphylococcus aureus. Twenty compounds belonging to phenols, flavonoids, organic acids, terpenoids groups were reported. Eighteen plant compounds passed in Lipinski's rule of five. iGEMDOCK revealed diferulic acid has the least binding energy -102.37 kcal/mole to penicillin-binding protein 2a and taxifolin has the least binding energy of -103.12 kcal/mole to erythromycin ribosomal methylase in comparison to control linezolid. These compounds raise the potential for developing potent inhibitors of penicillin-binding protein 2a and erythromycin ribosomal methylase for drug development. ADMET properties revealed that eighteen studied compounds were found in category III and IV with non-toxic properties except two butin and taxifolin found in category II with toxic properties. Conclusions. It can be concluded that diferulic acid and taxifolin compounds provide the best inhibitor effect to PBP2a and ERM protein for inhibition of MRSA and MLSB resistant strains of S. aureus through the application of molecular docking, leading to a lead drug candidate for the treatment of diseases.
Źródło:
BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology; 2022, 103, 1; 5-18
0860-7796
Pojawia się w:
BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Human hAtg2A protein expressed in yeast is recruited to preautophagosomal structure but does not complement autophagy defects of atg2Δ strain
Autorzy:
Romanyuk, Daria
Polak, Anna
Maleszewska, Agnieszka
Sieńko, Marzena
Grynberg, Marcin
Żołądek, Teresa
Powiązania:
https://bibliotekanauki.pl/articles/1039889.pdf
Data publikacji:
2011
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
autophagy
yeast Atg2
nitrogen starvation
human hAtg2A protein
Opis:
Yeast ScAtg2, an autophagy-related protein, is highly conserved in other fungi and has two homologues in humans, one of which is hAtg2A encoded by the hATG2A/KIAA0404 gene. Region of homology between Atg2 and hAtg2A proteins comprises the C-terminal domain. We used yeast atg2D strain to express the GFP-KIAA0404 gene, its fragment or fusions with yeast ATG2, and study their effects on autophagy. The GFP-hAtg2A protein localized to punctate structures, some of which colocalized with Ape1-RFP-marked preautophagosomal structure (PAS), but it did not restore autophagy in atg2Δ cells. N-terminal fragment of Atg2 and N-terminal fragment of hAtg2A were sufficient for PAS recruitment but were not sufficient to function in autophagy. Neither a fusion of the N-terminal fragment of hAtg2A with C-terminal domain of Atg2 nor a reciprocal fusion were functional in autophagy. hAtg2A, in contrast to yeast Atg2, did not show interaction with the yeast autophagy protein Atg9 but both Atg2 proteins showed interaction with Atg18, a phospholipid-binding protein, in two-hybrid system. Moreover, deletion of ATG18 abrogated PAS recruitment of hAtg2A. Our results show that human hAtg2A can not function in autophagy in yeast, however, it is recruited to the PAS, possibly due to the interaction with Atg18.
Źródło:
Acta Biochimica Polonica; 2011, 58, 3; 365-374
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
PP2A phosphatase interacts with CPK kinase and regulates pathogenesis responses triggered by intracellular ROS signals
Autorzy:
Kangasjarvi, S.
Denessiouk, K.
Trotta, A.
Konert, G.
Rahikainen, M.
Li, S.
Mhamdi, A.
Noctor, G.
Powiązania:
https://bibliotekanauki.pl/articles/80995.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
conference
protein phosphatase 2A
calcium-dependent protein kinase
reactive oxygen species
organelle
protein kinase
plant immunity
Arabidopsis
Źródło:
BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology; 2013, 94, 2
0860-7796
Pojawia się w:
BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Theoretical models of catalytic domains of protein phosphatases 1 and 2A with Zn2+ and Mn2+ metal dications and putative bioligands in their catalytic centers.
Autorzy:
Woźniak-Celmer, Edyta
Ołdziej, Stanisław
Ciarkowski, Jerzy
Powiązania:
https://bibliotekanauki.pl/articles/1044161.pdf
Data publikacji:
2001
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
protein phosphatase inhibitors
constrained simulated annealing
protein phosphatase 1A and 2B
molecular dynamics
homology modeling
Opis:
The oligomeric metalloenzymes protein phosphatases dephosphorylate OH groups of Ser/Thr or Tyr residues of proteins whose actions depend on the phosphorus signal. The catalytic units of Ser/Thr protein phosphatases 1, 2A and 2B (PP1c, PP2Ac and PP2Bc, respectively), which exhibit about 45% sequence similarity, have their active centers practically identical. This feature strongly suggests that the unknown structure of PP2Ac could be successfully homology-modeled from the known structures of PP1c and/or PP2Bc. Initially, a theoretical model of PP1c was built, including a phosphate and a metal dication in its catalytic site. The latter was modeled, together with a structural hydroxyl anion, as a triangular pseudo-molecule (Zno or Mno), composed of two metal cations (double Zn2+ or Mn2+, respectively) and the OH- group. To the free PP1c two inhibitor sequences R29RRRPpTPAMLFR40 of DARPP-32 and R30RRRPpTPATLVLT42 of Inhibitor-1, and two putative substrate sequences LRRApSVA and QRRQRKpRRTI were subsequently docked. In the next step, a free PP2Ac model was built via homology re-modeling of the PP1c template and the same four sequences were docked to it. Thus, together, 20 starting model complexes were built, allowing for combination of the Zno and Mno pseudo-molecules, free enzymes and the peptide ligands docked in the catalytic sites of PP1c and PP2Ac. All models were subsequently subjected to 250-300 ps molecular dynamics using the AMBER 5.0 program. The equilibrated trajectories of the final 50 ps were taken for further analyses. The theoretical models of PP1c complexes, irrespective of the dication type, exhibited increased mobilities in the following residue ranges: 195-200, 273-278, 287-209 for the inhibitor sequences and 21-25, 194-200, 222-227, 261, 299-302 for the substrate sequences. Paradoxically, the analogous PP2Ac models appeared much more stable in similar simulations, since only their "prosegment" residues 6-10 and 14-18 exhibited an increased mobility in the inhibitor complexes while no areas of increased mobility were found in the substrate complexes. Another general observation was that the complexes with Mn dications were more stable than those with Zn dications for both PP1c and PP2Ac units.
Źródło:
Acta Biochimica Polonica; 2001, 48, 1; 35-52
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Regulation of renal Na+,K+ -ATPase and ouabain-sensitive H+,K+ -ATPase by the cyclic AMP-protein kinase A signal transduction pathway.
Autorzy:
Bełtowski, Jerzy
Marciniak, Andrzej
Wójcicka, Grażyna
Górny, Dionizy
Powiązania:
https://bibliotekanauki.pl/articles/1043651.pdf
Data publikacji:
2003
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
kidney
cyclic AMP
protein kinase A
cytochrome P450-dependent arachidonate metabolites
Na+,K+ -ATPase
H+,K+ -ATPase
Opis:
We investigated the effect of the cyclic AMP-protein kinase A (PKA) signalling pathway on renal Na+,K+-ATPase and ouabain-sensitive H+,K+-ATPase. Male Wistar rats were anaesthetized and catheter was inserted through the femoral artery into the abdominal aorta proximally to the renal arteries for infusion of the investigated substances. Na+,K+-ATPase activity was measured in the presence of Sch 28080 to block ouabain-sensitive H+,K+-ATPase and improve specificity of the assay. Dibutyryl-cyclic AMP (db-cAMP) administered at a dose of 10-17 mol/kg per min and 10-6 mol/kg per min increased Na+,K+-ATPase activity in the renal cortex by 34% and 42%, respectively, and decreased it in the renal medulla by 30% and 44%, respectively. db-cAMP infused at 10-6 mol/kg per min increased the activity of cortical ouabain-sensitive H+,K+-ATPase by 33%, and medullary ouabain-sensitive H+,K+-ATPase by 30%. All the effects of db-cAMP were abolished by a specific inhibitor of protein kinase A, KT 5720. The stimulatory effect on ouabain-sensitive H+,K+-ATPase and on cortical Na+,K+-ATPase was also abolished by brefeldin A which inhibits the insertion of proteins into the plasma membranes, whereas the inhibitory effect on medullary Na+,K+-ATPase was partially attenuated by 17-octadecynoic acid, an inhibitor of cytochrome P450-dependent arachidonate metabolism. We conclude that the cAMP-PKA pathway stimulates Na+,K+-ATPase in the renal cortex as well as ouabain-sensitive H+,K+-ATPase in the cortex and medulla by a mechanism requiring insertion of proteins into the plasma membrane. In contrast, medullary Na+,K+-ATPase is inhibited by cAMP through a mechanism involving cytochrome P450-dependent arachidonate metabolites.
Źródło:
Acta Biochimica Polonica; 2003, 50, 1; 103-114
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Arabidopsis thaliana Nudix hydrolase AtNUDT7 forms complexes with the regulatory RACK1A protein and Ggamma subunits of the signal transducing heterotrimeric G protein
Autorzy:
Olejnik, Kamil
Bucholc, Maria
Anielska-Mazur, Anna
Lipko, Agata
Kujawa, Martyna
Modzelan, Marta
Augustyn, Agnieszka
Kraszewska, Elzbieta
Powiązania:
https://bibliotekanauki.pl/articles/1039863.pdf
Data publikacji:
2011
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
protein complexes
Nudix
AtNUDT7
Arabidopsis thaliana
heterotrimeric G protein
RACK1A
Opis:
Arabidopsis thaliana AtNUDT7 Nudix pyrophosphatase hydrolyzes NADH and ADP-ribose in vitro and is an important factor in the cellular response to diverse biotic and abiotic stresses. Several studies have shown that loss-of-function Atnudt7 mutant plants display many profound phenotypes. However the molecular mechanism of AtNUDT7 function remains elusive. To gain a better understanding of this hydrolase cellular role, proteins interacting with AtNUDT7 were identified. Using AtNUDT7 as a bait in an in vitro binding assay of proteins derived from cultured Arabidopsis cell extracts we identified the regulatory protein RACK1A as an AtNUDT7-interactor. RACK1A-AtNUDT7 interaction was confirmed in a yeast two-hybrid assay and in a pull-down assay and in Bimolecular Fluorescence Complementation (BiFC) analysis of the proteins transiently expressed in Arabidopsis protoplasts. However, no influence of RACK1A on AtNUDT7 hydrolase catalytic activity was observed. In vitro interaction between RACK1A and the AGG1 and AGG2 gamma subunits of the signal transducing heterotrimeric G protein was also detected and confirmed in BiFC assays. Moreover, association between AtNUDT7 and both AGG1 and AGG2 subunits was observed in Arabidopsis protoplasts, although binding of these proteins could not be detected in vitro. Based on the observed interactions we conclude that the AtNUDT7 Nudix hydrolase forms complexes in vitro and in vivo with regulatory proteins involved in signal transduction. Moreover, we provide the initial evidence that both signal transducing gamma subunits bind the regulatory RACK1A protein.
Źródło:
Acta Biochimica Polonica; 2011, 58, 4; 609-616
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Interaction of class A G protein-coupled receptors with G protein.
Autorzy:
Ślusarz, Rafał
Ciarkowski, Jerzy
Powiązania:
https://bibliotekanauki.pl/articles/1043328.pdf
Data publikacji:
2004
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
GPCR class A
GPCR activation
G protein
Opis:
A model for interaction of class A G protein-coupled receptor with the G protein Gα subunit is proposed using the rhodopsin-transducin (RD/Gt) prototype. The model combines the resolved interactions/distances, essential in the active RD*/Gt system, with the structure of Gtα C-terminal peptide bound to RD* while stabilizing it. Assuming the interactions involve conserved parts of the partners, the model specifies the conserved Helix 2 non-polar X- - -X, Helix 3 DRY and Helix 7/8 NP- -Y- - F RD* motifs interacting with the Gtα C-terminal peptide, in compliance with the structure of the latter. A concomitant role of Gtα and Gtγ>C-termini in stabilizing RD* could possibly be resolved assuming a receptor dimer as requisite for G protein activation.
Źródło:
Acta Biochimica Polonica; 2004, 51, 1; 129-136
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Conformational stability of six truncated cHMG1a proteins studied in their mixture by H/D exchange and electrospray ionization mass spectrometry.
Autorzy:
Petry, Inga
Wiśniewski, Jacek
Szewczuk, Zbigniew
Powiązania:
https://bibliotekanauki.pl/articles/1044060.pdf
Data publikacji:
2001
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
cHMG1a
protein conformation
ESI-MS
isotope exchange
Opis:
The high mobility group (HMG) proteins are abundant non-histone components of eukaryotic chromatin. The presence of C-terminal acidic tails is a common feature of the majority of HMG proteins. Although the biological significance of the acidic domains is not clear, they are conferring conformational and metabolic stability to the proteins in vitro. Moreover, the length and net charge of the acidic tails affect the strength of HMG protein interaction with DNA. Synthesis of an insect HMG protein by standard recombinant technology in bacteria leads to a mixture of the intact protein (cHMG1a-(1-113) (I)) and a series of its degradation products truncated at the C tail: cHMG1a-(1-111) (II); cHMG1a-(1-110) (III); cHMG1a-(1-109) (IV); cHMG1a-(1-108) (V); cHMG1a-(1-107) (VI); cHMG1a-(1-106) (VII). The proteins differ from each other only by the number of amino-acid residues at the C-terminal tail. We used H/D exchange mass spectrometry to characterize the stability of the proteins directly in their mixture. The results show that the proteins I-V and VII have very similar conformations. The protein VI is less compact and exchanges its protons faster than the others. It may be concluded that the C-terminal tail influences the conformation of the cHMG1a protein and that individual residues in this part of the protein play a key role in its compactness.
Źródło:
Acta Biochimica Polonica; 2001, 48, 4; 1131-1136
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
3D domain swapping – implications for conformational disorders and ways of control
Autorzy:
Jaskolski, M.
Powiązania:
https://bibliotekanauki.pl/articles/80151.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
3D domain swapping
amyloid
crystalline
cystatin
fibril
human cystatin C
mutagenesis
oligomerization
polypeptide chain
prion protein
protein aggregation
protein engineering
ribonuclease A
Źródło:
BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology; 2011, 92, 1
0860-7796
Pojawia się w:
BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Chimeric protein ABRaA-VEGF121 is cytotoxic towards VEGFR-2-expressing PAE cells and inhibits B16-F10 melanoma growth
Autorzy:
Smagur, Andrzej
Boyko, Mariya
Biront, Nadiya
Cichoń, Tomasz
Szala, Stanisław
Powiązania:
https://bibliotekanauki.pl/articles/1040641.pdf
Data publikacji:
2009
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
melanoma B16-F10
abrin-a A-chain
chimeric protein
VEGF121
Opis:
It has been known that VEGF121 isoform can serve as a carrier of therapeutic agents targeting tumor endothelial cells. We designed and constructed synthetic cDNA that encodes a chimeric protein comprising abrin-a (ABRaA) toxin A-chain and human VEGF121. Expression of the ABRaA-VEGF121 chimeric protein was carried out in E. coli strain BL21(DE3). ABRaA-VEGF121 preparations were isolated from inclusion bodies, solubilized and purified by affinity and ion-exchanged chromatography (Ni-agarose and Q-Sepharose). Finaly, bacterial endotoxin was removed from the recombinant protein. Under non-reducing conditions, the recombinant protein migrates in polyacrylamide gel as two bands (about 84 kDa homodimer and about 42 kDa monomer). ABRaA-VEGF121 is strongly cytotoxic towards PAE cells expressing VEGFR-2, as opposed to VEGFR-1 expressing or parental PAE cells. The latter are about 400 times less sensitive to the action of this fusion protein. The biological activity of the ABRaA domain forming part of the chimeric protein was assessed in vitro: ABRaA-VEGF121 inhibited protein biosynthesis in a cell-free translation system. Preincubation of ABRaA-VEGF121 with antibody neutralizing the biological activity of human VEGF abolished the cytotoxic effect of the chimeric protein in PAE/KDR cells. Experiments in vivo demonstrated that ABRaA-VEGF121 inhibits growth of B16-F10 murine melanoma tumors.
Źródło:
Acta Biochimica Polonica; 2009, 56, 1; 115-124
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Muscle cathepsins of marine fish and invertebrates
Autorzy:
Kolodziejska, I.
Sikorski, Z.E.
Powiązania:
https://bibliotekanauki.pl/articles/1372835.pdf
Data publikacji:
1995
Wydawca:
Instytut Rozrodu Zwierząt i Badań Żywności Polskiej Akademii Nauk w Olsztynie
Tematy:
invertebrate
endopeptidase
fish
structure
protease
extracellular matrix
lysosome
exopeptidase
cathepsin C
cathepsin A
muscle protein
myofibrillar protein
lysosomal protease
marine fish
protein
myofibril
muscle cathepsin
food preservation
sarcoplasm
cathepsin L
carboxypeptidase A
cathepsin B
Opis:
Muscle proteases are located mainly in the lysosomes, in the sarcoplasm, and in the extracellular matrix of the connective tissue surrounding each cell. The lysosomal proteases, cathepsins, have optimum activity in the acidic range, although many of them retain high activity also 1 or 2 pH units away from the optimum value. Among the cathepsins there are endopeptidases and exopeptidases. Most cathepsins hydrolyse several proteins of the myofibrils. The major protease of the lysosomes in fish and squid muscles is cathepsin D, an aspartyl endoproteinase. Although it is present in the muscle fibre itself, its generally rather low activity at low temperature limits its significance in tenderization of refrigerated fish of most species. Cathepsin L, a cysteinyl protease, is involved in autolysis and softening in matured chum salmon. Cathepsin B, a cysteinyl carboxypeptidase, is capable to attack also some myofibrillar proteins. Cathepsin A or carboxypeptidase A, and cathepsin C, a dipeptidyl hydrolase and dipeptidyl transferase, contribute to the hydrolysis of muscle proteins in a concerted action with the other cathepsins.
Źródło:
Polish Journal of Food and Nutrition Sciences; 1995, 04, 3; 3-10
1230-0322
2083-6007
Pojawia się w:
Polish Journal of Food and Nutrition Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
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