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1.

001-es BibID:BIBFORM004700
Első szerző:Bagdány Miklós
Cím:Non-random distribution of Kv1.3 channels in the lymphocyte plasma membrane / Bagdany, M., Varga, S., Szentesi, G., Bodnar, A., Jenei, A., Damjanovich, S., Gaspar, R., Panyi, G.
Dátum:2002
Tárgyszavak:Orvostudományok Elméleti orvostudományok idézhető absztrakt
Megjelenés:Biophysical Journal. - 82 : 1 (2002), p. 1212. -
További szerzők:Varga Sándor (1943-) (biofizikus) Szentesi Gergely (1976-) (kémia-fizika tanár) Dóczy-Bodnár Andrea (1970-) (biofizikus) Jenei Attila (1966-) (biofizikus) Damjanovich Sándor (1936-2017) (biofizikus) Gáspár Rezső (1944-) (biofizikus) Panyi György (1966-) (biofizikus)
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2.

001-es BibID:BIBFORM004687
Első szerző:Nagy Péter (biofizikus)
Cím:Cell fusion experiments reveal distinctly different association characteristics of cell-surface receptors / Péter Nagy, László Mátyus, Attila Jenei, György Panyi, Sándor Varga, János Matkó, János Szöllősi, Rezső Gáspár, Thomas M. Jovin, Sándor Damjanovich
Dátum:2001
Megjegyzések:The existence of small- and large-scale membrane protein clusters, containing dimers, oligomers and hundreds of proteins, respectively, has become widely accepted. However, it is largely unknown whether the internal structure of these formations is dynamic or static. Cell fusion was used to perturb the distribution of existing membrane protein clusters, and to investigate their mobility and associations. Scanning near-field optical microscopy, confocal and electron microscopy were applied to detect the exchange of proteins between large-scale protein clusters, whereas photobleaching fluorescence energy transfer was used to image the redistribution of existing small-scale membrane protein clusters. Large-scale clusters of major histocompatibility complex (MHC)-I exchanged proteins with each other and with MHC-II clusters. Similarly to MHC-I, large-scale MHC-II clusters were also dynamic. Exchange of components between small-scale protein clusters was not universal: intermixing did not take place in the case of MHC-II homoclusters; however, it was observed for homoclusters of MHC-I and for heteroclusters of MHC-I and MHC-II. These processes required a fluid state of the plasma membrane, and did not depend on endocytosis-mediated recycling of proteins. The redistribution of large-scale MHC-I clusters precedes the intermixing of small-scale clusters of MHC-I indicating a hierarchy in protein association. Investigation of a set of other proteins (alpha subunit of the interleukin 2 receptor, CD48 and transferrin receptor) suggested that a large-scale protein cluster usually exchanges components with the same type of clusters. These results offer new insight into processes requiring time-dependent changes in membrane protein interactions.
Tárgyszavak:Orvostudományok Elméleti orvostudományok idegen nyelvű folyóiratközlemény külföldi lapban
Biophysics
Cell Fusion
Cell Line
Cell Membrane
chemistry
Dyes
Energy Transfer
Fluorescence
Fluorescent Dyes
Gold Colloid
Histocompatibility Antigens
Histocompatibility Antigens Class I
Histocompatibility Antigens Class II
Human
Hungary
Interleukin-2
Major Histocompatibility Complex
Membrane Microdomains
metabolism
methods
Microscopy
Microscopy,Fluorescence
physiology
Proteins
Receptor Aggregation
Receptors,Cell Surface
Receptors,Interleukin-2
Support,Non-U.S.Gov't
Megjelenés:Journal of Cell Science 114 : Pt 22 (2001), p. 4063-4071. -
További szerzők:Mátyus László (1956-) (biofizikus) Jenei Attila (1966-) (biofizikus) Panyi György (1966-) (biofizikus) Varga Sándor (1943-) (biofizikus) Matkó János (1952-) (biológus) Szöllősi János (1953-) (biofizikus) Gáspár Rezső (1944-) (biofizikus) Jovin, Thomas M. Damjanovich Sándor (1936-2017) (biofizikus)
Internet cím:elektronikus változat
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3.

001-es BibID:BIBFORM004736
Első szerző:Panyi György (biofizikus)
Cím:Colocalization and nonrandom distribution of Kv1.3 potassium channels and CD3 molecules in the plasma membrane of human T lymphocytes / Panyi, G., Bagdany, M., Bodnar, A., Vamosi, G., Szentesi, G., Jenei, A., Matyus, L., Varga, S., Waldmann, T. A., Gaspar, R., Damjanovich, S.
Dátum:2003
ISSN:027-8424 (Print)
Megjegyzések:Distribution and lateral organization of Kv1.3 potassium channels and CD3 molecules were studied by using electron microscopy, confocal laser scanning microscopy, and fluorescence resonance energy transfer. Immunogold labeling and electron microscopy showed that the distribution of FLAG epitope-tagged Kv1.3 channels (Kv1.3/FLAG) significantly differs from the stochastic Poisson distribution in the plasma membrane of human T lymphoma cells. Confocal laser scanning microscopy images showed that Kv1.3/FLAG channels and CD3 molecules accumulated in largely overlapping membrane areas. The numerical analysis of crosscorrelation of the spatial intensity distributions yielded a high correlation coefficient (C = 0.64). A different hierarchical level of molecular proximity between Kv1.3/FLAG and CD3 proteins was reported by a high fluorescence resonance energy transfer efficiency (E = 51%). These findings implicate that reciprocal regulation of ion-channel activity, membrane potential, and the function of receptor complexes may contribute to the proper functioning of the immunological synapse.
Tárgyszavak:Orvostudományok Elméleti orvostudományok idegen nyelvű folyóiratközlemény külföldi lapban
analysis
Animals
Antigens, CD3
Biophysics
biosynthesis
Cell Membrane
Cells
chemistry
Electrophysiology
Energy Transfer
Epitopes
Fluorescence
Fluorescence Resonance Energy Transfer
Human
Humans
Hungary
Immunohistochemistry
immunology
Jurkat Cells
Kv1.3 Potassium Channel
Lymphocytes
Lymphoma
metabolism
Mice
Microscopy
Microscopy, Confocal
Microscopy, Electron
Models, Statistical
Potassium
Potassium Channels
Potassium Channels, Voltage-Gated
Proteins
Research
Support
T-Lymphocytes
Transfection
Megjelenés:Proceedings of the National Academy of Sciences of the United States of America. - 100 : 5 (2003), p. 2592-2597. -
További szerzők:Bagdány Miklós Dóczy-Bodnár Andrea (1970-) (biofizikus) Vámosi György (1967-) (biofizikus) Szentesi Gergely (1976-) (kémia-fizika tanár) Jenei Attila (1966-) (biofizikus) Mátyus László (1956-) (biofizikus) Varga Sándor (1943-) (biofizikus) Waldmann, Thomas A. Gáspár Rezső (1944-) (biofizikus) Damjanovich Sándor (1936-2017) (biofizikus)
Internet cím:DOI
elektronikus változat
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