scholarly journals Adhesion of phospholipid vesicles to Chinese hamster fibroblasts: Role of cell surface proteins

1977 ◽  
Vol 74 (2) ◽  
pp. 531-546 ◽  
Author(s):  
R. Pagano
Keyword(s):  
Cell Surface ◽  
Chinese Hamster ◽  
Surface Proteins ◽  
Phospholipid Vesicles ◽  
Cell Surface Proteins

scholarly journals Functional correlation between cell adhesive properties and some cell surface proteins.

1977 ◽  
Vol 75 (2) ◽  
pp. 464-474 ◽  
Author(s):  
M Takeichi
Keyword(s):  
Cell Surface ◽  
Chinese Hamster ◽  
Surface Protein ◽  
Surface Proteins ◽  
Adhesive Properties ◽  
Cell Surface Proteins ◽  
Morphological Studies ◽  
Chinese Hamster V79 Cells ◽  
A Cell ◽  
In Cells

The adhesive properties of Chinese hamster V79 cells were analyzed and characterized by various cell dissociation treatments. The comparisons of aggregability among cells dissociated with EDTA, trypsin + Ca2+, and trypsin + EDTA, revealed that these cells have two adhesion mechanisms, a Ca2+-independent and a Ca2+-dependent one. The former did not depend on temperature, whereas the latter occurred only at physiological temperatures. Both mechanisms were trypsin sensitive, but the Ca2+-dependent one was protected by Ca2+ against trypsinization. In morphological studies, the Ca2+-independent adhesion appeared to be a simple agglutination or flocculation of cells, whereas the Ca2+-dependent adhesion seemed to be more physiological, being accompanied by cell deformation resulting in the increase of contact area between adjacent cells. Lactoperoxidase-catalyzed iodination of cell surface proteins revealed that several proteins are more intensely labeled in cells with Ca2+-independent adhesiveness than in cells without that property. It was also found that a cell surface protein with a molecular weight of approximately 150,000 is present only in cells with Ca2+-dependent adhesiveness. The iodination and trypsinization of this protein were protected by Ca2+, suggesting its reactivity to Ca2+. Possible mechanisms for each adhesion property are discussed, taking into account the correlation of these proteins with cell adhesiveness.

scholarly journals Find and fuse: Unsolved mysteries in sperm–egg recognition

PLoS Biology ◽  
2020 ◽  
Vol 18 (11) ◽  
pp. e3000953
Author(s):  
Enrica Bianchi ◽  
Gavin J. Wright
Keyword(s):  
Cell Surface ◽  
Sperm Cell ◽  
Surface Proteins ◽  
Secreted Proteins ◽  
Egg Recognition ◽  
Cell Surface Proteins ◽  
Molecular Events ◽  
Eukaryotic Species ◽  
Fundamental Process

Sexual reproduction is such a successful way of creating progeny with subtle genetic variations that the vast majority of eukaryotic species use it. In mammals, it involves the formation of highly specialised cells: the sperm in males and the egg in females, each carrying the genetic inheritance of an individual. The interaction of sperm and egg culminates with the fusion of their cell membranes, triggering the molecular events that result in the formation of a new genetically distinct organism. Although we have a good cellular description of fertilisation in mammals, many of the molecules involved remain unknown, and especially the identity and role of cell surface proteins that are responsible for sperm–egg recognition, binding, and fusion. Here, we will highlight and discuss these gaps in our knowledge and how the role of some recently discovered sperm cell surface and secreted proteins contribute to our understanding of this fundamental process.

The role of cell surface proteins gene expression in diagnosis, prognosis, and drug resistance of colorectal cancer: In silico analysis and validation

2021 ◽  
Vol 123 ◽  
pp. 104688
Author(s):  
Nasrin Nazempour ◽  
Mohammad Hossein Taleqani ◽  
Navid Taheri ◽  
Amir Hossein Haji Ali Asgary Najafabadi ◽  
Alireza Shokrollahi ◽  
...  
Keyword(s):  
Gene Expression ◽  
Colorectal Cancer ◽  
Drug Resistance ◽  
Cell Surface ◽  
In Silico ◽  
In Silico Analysis ◽  
Surface Proteins ◽  
Cell Surface Proteins ◽  
Silico Analysis

scholarly journals Cell Surface Proteins in Hepatocellular Carcinoma: From Bench to Bedside

Vaccines ◽  
2020 ◽  
Vol 8 (1) ◽  
pp. 41
Author(s):  
Gabriel Siracusano ◽  
Maria Tagliamonte ◽  
Luigi Buonaguro ◽  
Lucia Lopalco
Keyword(s):  
Hepatocellular Carcinoma ◽  
Cell Surface ◽  
Intracellular Signaling ◽  
Surface Proteins ◽  
Signaling Proteins ◽  
Cell Surface Proteins ◽  
Neoplastic Diseases ◽  
Extracellular Environment

Cell surface proteins act as the go-between in carrying the information from the extracellular environment to the intracellular signaling proteins. However, these proteins are often deregulated in neoplastic diseases, including hepatocellular carcinoma. This review discusses several recent studies that have investigated the role of cell surface proteins in the occurrence and progression of HCC, highlighting the possibility to use them as biomarkers of the disease and/or targets for vaccines and therapeutics.

Identification of potential cell-surface proteins inCandida albicansand investigation of the role of a putative cell-surface glycosidase in adhesion and virulence

Yeast ◽  
2004 ◽  
Vol 21 (4) ◽  
pp. 285-302 ◽  
Author(s):  
Christine Alberti-Segui ◽  
Arturo J. Morales ◽  
Heming Xing ◽  
Marco M. Kessler ◽  
Debra Aker Willins ◽  
...  
Keyword(s):  
Cell Surface ◽  
Surface Proteins ◽  
Cell Surface Proteins

scholarly journals Role of SrtA in Pathogenicity of Staphylococcus lugdunensis

2020 ◽  
Vol 8 (12) ◽  
pp. 1975
Author(s):  
Muzaffar Hussain ◽  
Christian Kohler ◽  
Karsten Becker
Keyword(s):  
Cell Wall ◽  
Cell Surface ◽  
Biofilm Formation ◽  
Surface Proteins ◽  
Transcription Level ◽  
Coagulase Negative Staphylococci ◽  
Staphylococcus Lugdunensis ◽  
Cell Surface Proteins ◽  
Mutant Strains

Among coagulase-negative staphylococci (CoNS), Staphylococcus lugdunensis has a special position as causative agent of aggressive courses of infectious endocarditis (IE) more reminiscent of IEs caused by Staphylococcus aureus than those by CoNS. To initiate colonization and invasion, bacterial cell surface proteins are required; however, only little is known about adhesion of S. lugdunensis to biotic surfaces. Cell surface proteins containing the LPXTG anchor motif are covalently attached to the cell wall by sortases. Here, we report the functionality of Staphylococcus lugdunensis sortase A (SrtA) to link LPXTG substrates to the cell wall. To determine the role of SrtA dependent surface proteins in biofilm formation and binding eukaryotic cells, we generated SrtA-deficient mutants (ΔsrtA). These mutants formed a smaller amount of biofilm and bound less to immobilized fibronectin, fibrinogen, and vitronectin. Furthermore, SrtA absence affected the gene expression of two different adhesins on transcription level. Surprisingly, we found no decreased adherence and invasion in human cell lines, probably caused by the upregulation of further adhesins in ΔsrtA mutant strains. In conclusion, the functionality of S. lugdunensis SrtA in anchoring LPXTG substrates to the cell wall let us define it as the pathogen’s housekeeping sortase.

Ecto-ADP-ribose Transferases: Cell-Surface Response to Local Tissue Injury

Physiology ◽  
2005 ◽  
Vol 20 (6) ◽  
pp. 374-381 ◽  
Author(s):  
Anna Zolkiewska
Keyword(s):  
Cell Surface ◽  
Tissue Injury ◽  
Membrane Receptors ◽  
Surface Proteins ◽  
Main Role ◽  
Membrane Stress ◽  
Cell Surface Proteins ◽  
Physiological Conditions ◽  
Arginine Residues

Ecto-ADP-ribose transferases (ecto-ARTs) catalyze the transfer of ADP-ribose from NAD+ to arginine residues in cell-surface proteins. Since the concentration of extracellular NAD+ is very low under normal physiological conditions but rises significantly upon tissue injury or membrane stress, it is postulated that the main role of ecto-ARTs is to ADP-ribosylate and regulate the function of certain membrane receptors in response to elevated levels of NAD+.

Sign in / Sign up

Export Citation Format

Share Document