Találati lista | Tudóstér

001-es BibID:	BIBFORM098753
035-os BibID:	(cikkazonosító)11514 (scopus)85117957430 (wos)000722332400001
Első szerző:	Vörös Orsolya (biotechnológus)
Cím:	Immune Synapse Residency of Orai1 Alters Ca2+ Response of T Cells / Vörös Orsolya, Panyi György, Hajdu Péter
Dátum:	2021
ISSN:	1661-6596 1422-0067
Megjegyzések:	Abstract CRAC, which plays important role in Ca2+-dependent T-lymphocyte activation, is composed of the ER-resident STIM1 and the plasma membrane Orai1 pore-forming subunit. Both accumulate at the immunological synapse (IS) between a T cell and an antigen-presenting cell (APC). We hypothesized that adapter/interacting proteins regulate Orai1 residence in the IS. We could show that mGFP-tagged Orai1-Full channels expressed in Jurkat cells had a biphasic IS-accumulation kinetics peaked at 15 min. To understand the background of Orai1 IS-redistribution we knocked down STIM1 and SAP97 (adaptor protein with a short IS-residency (15 min) and ability to bind Orai1 N-terminus): the mGFP-Orai1-Full channels kept on accumulating in the IS up to the 60th minute in the STIM1- and SAP97-lacking Jurkat cells. Deletion of Orai1 N terminus (mGFP-Orai1-?72) resulted in the same time course as described for STIM1/SAP97 knock-down cells. Ca2+-imaging of IS-engaged T-cells revealed that of Orai1 residency modifies the Ca2+-response: cells expressing mGFP-Orai1-?72 construct or mGFP-Orai1-Full in SAP-97 knock-down cells showed higher number of Ca2+-oscillation up to the 90th minute after IS formation. Overall, these data suggest that SAP97 may contribute to the short-lived IS-residency of Orai1 and binding of STIM1 to Orai1 N-terminus is necessary for SAP97-Orai1 interaction.
Tárgyszavak:	Orvostudományok Elméleti orvostudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk Orai1 immunological synapse calcium signaling STIM1 SAP97
Megjelenés:	International Journal Of Molecular Sciences. - 22 : 21 (2021), p. 1-19. -
További szerzők:	Panyi György (1966-) (biofizikus) Hajdu Péter (1975-) (biofizikus)
Pályázati támogatás:	K128525 NKFIH GINOP-2.3.2-15-2016-00044 GINOP K119417 NKFIH EFOP-3.6.2-16-2017-00006 EFOP EFOP-3.6.3-VEKOP-16-2017-00009 EFOP GINOP-2.3.2-15-2016-00020 GINOP
Internet cím:	Szerző által megadott URL DOI Intézményi repozitóriumban (DEA) tárolt változat
Borító:
Saját polcon:

001-es BibID:	BIBFORM073175
035-os BibID:	(Cikkazonosító)5937 (WOS)000429785900077 (Scopus)85045438668
Első szerző:	Vörös Orsolya (biotechnológus)
Cím:	The C-terminal HRET sequence of Kv1.3 regulates gating rather than targeting of Kv1.3 to the plasma membrane / Orsolya Voros, Orsolya Szilagyi, András Balajthy, Sándor Somodi, Gyorgy Panyi, Péter Hajdu
Dátum:	2018
ISSN:	2045-2322
Megjegyzések:	Kv1.3 channels are expressed in several cell types including immune cells, such as T lymphocytes. Thetargeting of Kv1.3 to the plasma membrane is essential for T cell clonal expansion and assumed to beguided by the C-terminus of the channel. Using two point mutants of Kv1.3 with remarkably diferentfeatures compared to the wild-type Kv1.3 (A413V and H399K having fast inactivation kinetics andtetraethylammonium-insensitivity, respectively) we showed that both Kv1.3 channel variants targetto the membrane when the C-terminus was truncated right after the conserved HRET sequence andproduce currents identical to those with a full-length C-terminus. The truncation before the HRETsequence (NOHRET channels) resulted in reduced membrane-targeting but non-functional phenotypes.NOHRET channels did not display gating currents, and coexpression with wild-type Kv1.3 did not rescuethe NOHRET-A413V phenotype, no heteromeric current was observed. Interestingly, mutants of wildtypeKv1.3 lacking HRET(E) (deletion) or substituted with fve alanines for the HRET(E) motif expressedcurrent indistinguishable from the wild-type. These results demonstrate that the C-terminal region ofKv1.3 immediately proximal to the S6 helix is required for the activation gating and conduction, whereasthe presence of the distal region of the C-terminus is not exclusively required for trafcking of Kv1.3 tothe plasma membrane.
Tárgyszavak:	Orvostudományok Elméleti orvostudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk Kv1.3 channels HRET sequence
Megjelenés:	Scientific Reports. - 8 : 1 (2018), p. 1-14. -
További szerzők:	Szilágyi Orsolya (1985-) (molekuláris biológus, biokémikus) Balajthy András (1988-) (általános orvos) Somodi Sándor (1977-) (belgyógyász) Panyi György (1966-) (biofizikus) Hajdu Péter (1975-) (biofizikus)
Pályázati támogatás:	GINOP-2.3.2-15-2016-00044 GINOP NKFIH K119417 NKFIH
Internet cím:	Szerző által megadott URL DOI Intézményi repozitóriumban (DEA) tárolt változat
Borító:
Saját polcon: