Results 51 to 60 of about 11,100 (249)

Immunodeficiency due to defects in store‐operated calcium entry [PDF]

Annals of the New York Academy of Sciences, 2011
Mutations in genes encoding the calcium‐release activated calcium (CRAC) channel abolish calcium influx in cells of the immune system and cause severe congenital immunodeficiency. Patients with autosomal recessive mutations in the CRAC channel gene ORAI1, its activator stromal interaction molecule 1 (STIM1), and mice with targeted deletion of Orai1 ...
openaire   +2 more sources

ORAI2 modulates store-operated calcium entry and T cell-mediated immunity

Nature Communications, 2017
Ca2+ release-activated Ca2+(CRAC) channels are essential for protective immunity, but the immunological functions of the three ORAI homologues that form CRAC channels are unclear. Here the authors show that ORAI1 and ORAI2 form heteromeric CRAC channels,
Martin Vaeth, Jun Yang, Megumi Yamashita, Isabelle Zee, Miriam Eckstein, Camille Knosp, Ulrike Kaufmann, Peter Karoly Jani, Rodrigo S. Lacruz, Veit Flockerzi, Imre Kacskovics, Murali Prakriya, Stefan Feske   +12 more
doaj   +1 more source

Organizing the interface—Plasma membrane architecture and receptor dynamics in virus‐cell interactions

FEBS Letters, EarlyView.
Plasma membranes contain dynamic nanoscale domains that organize lipids and receptors. Because viruses operate at similar scales, this architecture shapes early infection steps, including attachment, receptor engagement, and entry. Using influenza A virus and HIV‐1 as examples, we highlight how receptor nanoclusters, multivalent glycan interactions ...
Jan Schlegel, Christian Sieben
wiley   +1 more source

An unexpected alternative viologen electron mediator site in tungsten‐containing formate dehydrogenase

FEBS Letters, EarlyView.
An unexpected alternative interaction site for ethyl viologen was identified in formate dehydrogenase 1 from Methylorubrum extorquens. Combined mutagenesis, kinetic analysis, and docking revealed that aromatic residues near an iron–sulfur cluster enable flavin mononucleotide‐independent electron transfer, offering a framework for engineering improved ...
Eleni G. Poloniataki, Yong Hwan Kim
wiley   +1 more source

Exacerbated Skeletal Muscle Phenotype in Mice with ‘Homotypic’ Expression of the Tubular Aggregate Myopathy ORAI1 G100S Mutation

Biomedicines
Background: Tubular aggregate myopathy (TAM) is an autosomal dominant myopathy that results from gain-of-function mutations in the STIM1 and ORAI1 genes, which encode the two key proteins that coordinate store-operated Ca2+ entry in skeletal muscle and ...
Nan Zhao, Miao He, Robert T. Dirksen
doaj   +1 more source

Quetiapine inhibits microglial activation by neutralizing abnormal STIM1 mediated intercellular calcium homeostasis and promotes myelin repair in a cuprizone -induced mouse model of de-myelination

Frontiers in Cellular Neuroscience, 2015
Microglial activation has been considered as a crucial process in the pathogenesis of neuro-inflammation and psychiatric disorders. Several antipsychotic drugs have been shown to display inhibitory effects on microglial activation in vitro, possibly ...
Hanzhi eWang, Shubao eLiu, Yanping eTian, Xiyan eWu, Chengren eLi, Yangtao eHe, Michael eNamaka, Jiming eKong, Hongli eLi, Lan eXiao   +9 more
doaj   +1 more source

Structural insights and therapeutic targets in Acinetobacter baumannii capsule biosynthesis

FEBS Letters, EarlyView.
Hypervirulent KL49 A. baumannii's capsular polysaccharide contains the nonulosonic acid 8‐epi‐Leg5,7Ac2, synthesized by epimerization via ElaA, ElaB, and ElaC. Crystal structures of ElaA, ElaB, and ElaC reveal their role in CMP‐Leg5,7Ac2 synthesis and regioselective C8 epimerization.
Woo Cheol Lee, Junho Jeong, Chae Yeong Lee, Hyunjoon Cho, Man Hwan Oh, Je Chul Lee, Jee‐Young Lee, Yangmee Kim   +7 more
wiley   +1 more source

Characterization of novel store-operated calcium entry effectors

Biochimica et Biophysica Acta (BBA) - Molecular Cell Research, 2014
2-Aminoethyl diphenylborinate (2-APB) is a well-known effector of the store-operated Ca(2+) entry of several cell types such as immune cells, platelets and smooth muscle cells. 2-APB has a dual effect: potentiation at 1-5μM and inhibition at >30μM. Unfortunately, it is also able to modify the activity of other Ca(2+) transporters and, thus, cannot be ...
Djillani, Alaeddine, Nüße, Oliver, Dellis, Olivier   +2 more
openaire   +2 more sources

Suppression of store-operated calcium entry causes dilated cardiomyopathy of the Drosophila heart

Biology Open, 2020
Store-operated Ca2+ entry (SOCE) is an essential Ca2+ signaling mechanism present in most animal cells. SOCE refers to Ca2+ influx that is activated by depletion of sarco/endoplasmic reticulum (S/ER) Ca2+ stores.
Courtney E. Petersen, Matthew J. Wolf, Jeremy T. Smyth   +2 more
doaj   +1 more source

Three phosphatase families form a community: The phosphohydrolases that act upon inositol pyrophosphates

FEBS Letters, EarlyView.
Inositol pyrophosphates are energy‐rich signaling molecules that perform critical functions in cells. Three different families of phosphatases hydrolyze the β phosphate of the inositol pyrophosphate molecules: two have narrow specificities and one is promiscuous.
Ronda J. Rolfes
wiley   +1 more source