Candiello, Ermes

[["dc.bibliographiccitation.firstpage","142"],["dc.bibliographiccitation.issue","1"],["dc.bibliographiccitation.journal","Molecular Neurobiology"],["dc.bibliographiccitation.lastpage","161"],["dc.bibliographiccitation.volume","52"],["dc.contributor.author","Kratzke, Manuel"],["dc.contributor.author","Candiello, Ermes"],["dc.contributor.author","Schmidt, Bernhard"],["dc.contributor.author","Jahn, Olaf"],["dc.contributor.author","Schu, Peter"],["dc.date.accessioned","2018-11-07T09:54:05Z"],["dc.date.available","2018-11-07T09:54:05Z"],["dc.date.issued","2015"],["dc.description.abstract","Adaptor protein (AP)-1/sigma 1B(-/-) mice have reduced synaptic-vesicle (SV) recycling and increased endosomes. Mutant mice have impaired spatial memory, and sigma 1B-deficient humans have a severe mental retardation. In order to define these sigma 1B(-/-) 'bulk' endosomes and to determine their functions in SV recycling, we developed a protocol to separate them from the majority of the neuronal endosomes. The sigma 1B(-/-) 'bulk' endosomes proved to be classic early endosomes with an increase in the phospholipid phosphatidylinositol 3-phosphate (PI-3-P), which recruits proteins mediating protein sorting out of early endosomes into different routes. sigma 1B deficiency induced alterations in the endosomal proteome reveals two major functions: SV protein storage and sorting into endolysosomes. Alternative endosomal recycling pathways are not up-regulated, but certain SV proteins are misrouted. Tetraspanins are enriched in sigma 1B(-/-) synaptosomes, but not in their endosomes or in their clathrin-coated-vesicles (CCVs), indicating AP-1/sigma 1B-dependent sorting. Synapses contain also more AP-2 CCV, although it is expected that they contain less due to reduced SV recycling. Coat composition of these AP-2 CCVs is altered, and thus, they represent a subpopulation of AP-2 CCVs. Association of calmodulin-dependent protein kinase (CaMK)-II alpha, -delta and casein kinase (CK)-II alpha with the endosome/SV pool is altered, as well as 14-3-3 eta, indicating changes in specific signalling pathways regulating synaptic plasticity. The accumulation of early endosomes and endocytotic AP-2 CCV indicates the regulation of SV recycling via early endosomes by the interdependent regulation of AP-2-mediated endocytosis and AP-1/sigma 1B-mediated SV reformation."],["dc.description.sponsorship","DFG [Schu 802/3-1, 802/3-2]"],["dc.identifier.doi","10.1007/s12035-014-8852-0"],["dc.identifier.isi","000358341600014"],["dc.identifier.pmid","25128028"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/36465"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Humana Press Inc"],["dc.relation.issn","1559-1182"],["dc.relation.issn","0893-7648"],["dc.title","AP-1/sigma 1B-Dependent SV Protein Recycling Is Regulated in Early Endosomes and Is Coupled to AP-2 Endocytosis"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","356"],["dc.bibliographiccitation.issue","4"],["dc.bibliographiccitation.journal","European Journal of Cell Biology"],["dc.bibliographiccitation.lastpage","368"],["dc.bibliographiccitation.volume","96"],["dc.contributor.author","Zizioli, Daniela"],["dc.contributor.author","Geumann, Constanze"],["dc.contributor.author","Kratzke, Manuel"],["dc.contributor.author","Mishra, Ratnakar"],["dc.contributor.author","Borsani, Guiseppe"],["dc.contributor.author","Finazzi, Dario"],["dc.contributor.author","Candiello, Ermes"],["dc.contributor.author","Schu, Peter"],["dc.date.accessioned","2018-11-07T10:22:53Z"],["dc.date.available","2018-11-07T10:22:53Z"],["dc.date.issued","2017"],["dc.description.abstract","gamma 2 adaptin is homologous to gamma 1, but is only expressed in vertebrates while gamma 1 is found in all eukaryotes. We know little about gamma 2 functions and their relation to gamma 1. gamma 1 is an adaptin of the heterotetrameric AP-1 complexes, which sort proteins in and do form clathrin-coated transport vesicles and they also regulate maturation of early endosomes. gamma 1 knockout mice develop only to blastocysts and thus gamma 2 does not compensate gamma 1-deficiency in development. gamma 2 has not been classified as a clathrin-coated vesicle adaptor protein in proteome analyses and functions for monomeric gamma 2 in endosomal protein sorting have been proposed, but adaptin interaction studies suggested formation of heterotetrameric AP-1/gamma 2 complexes. We detected gamma 2 at the trans-Golgi network, on peripheral vesicles and identified gamma 2 clathrin-coated vesicles in mice. Ubiquitous sigma 1A and tissue-specific sigma 1B adaptins bind gamma 2 and gamma 1. sigma 1B knockout in mice does not effect gamma 1/sigma 1A AP-1 levels, but gamma 2/sigma 1A AP-1 levels are increased in brain and adipocytes. Also gamma 2 is essential in development. In zebrafish AP-1/gamma 2 and AP-1/gamma 1 fulfill different, essential functions in brain and the vascular system. (C) 2017 Elsevier GmbH. All rights reserved."],["dc.identifier.doi","10.1016/j.ejcb.2017.03.008"],["dc.identifier.isi","000404504700007"],["dc.identifier.pmid","28372831"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/42353"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","PUB_WoS_Import"],["dc.publisher","Elsevier Gmbh, Urban & Fischer Verlag"],["dc.relation.issn","1618-1298"],["dc.relation.issn","0171-9335"],["dc.title","gamma 2 and gamma 1AP-1 complexes: Different essential functions and regulatory mechanisms in clathrin-dependent protein sorting"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]