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11.
Kris Meerschaert Moe Phyu Tun Eline Remue Ariane De Ganck Ciska Boucherie Berlinda Vanloo Gisèle Degeest Joël Vandekerckhove Pascale Zimmermann Nitin Bhardwaj Hui Lu Wonhwa Cho Jan Gettemans 《Cellular and molecular life sciences : CMLS》2009,66(24):3951-3966
Zonula occludens proteins (ZO) are postsynaptic density protein-95 discs large-zonula occludens (PDZ) domain-containing proteins that play a fundamental role in the assembly of tight junctions and establishment of cell polarity. Here, we show that the second PDZ domain of ZO-1 and ZO-2 binds phosphoinositides (PtdInsP) and we identified critical residues involved in the interaction. Furthermore, peptide and PtdInsP binding of ZO PDZ2 domains are mutually exclusive. Although lipid binding does not seem to be required for plasma membrane localisation of ZO-1, phosphatidylinositol 4,5-bisphosphate (PtdIns(4,5)P 2) binding to the PDZ2 domain of ZO-2 regulates ZO-2 recruitment to nuclear speckles. Knockdown of ZO-2 expression disrupts speckle morphology, indicating that ZO-2 might play an active role in formation and stabilisation of these subnuclear structures. This study shows for the first time that ZO isoforms bind PtdInsPs and offers an alternative regulatory mechanism for the formation and stabilisation of protein complexes in the nucleus. 相似文献
12.
Functions and pathologies of BiP and its interaction partners 总被引:1,自引:1,他引:0
J. Dudek J. Benedix S. Cappel M. Greiner C. Jalal L. Müller R. Zimmermann 《Cellular and molecular life sciences : CMLS》2009,66(9):1556-1569
The endoplasmic reticulum (ER) is involved in a variety of essential and interconnected processes in human cells, including
protein biogenesis, signal transduction, and calcium homeostasis. The central player in all these processes is the ER-lumenal
polypeptide chain binding protein BiP that acts as a molecular chaperone. BiP belongs to the heat shock protein 70 (Hsp70)
family and crucially depends on a number of interaction partners, including co-chaperones, nucleotide exchange factors, and
signaling molecules. In the course of the last five years, several diseases have been linked to BiP and its interaction partners,
such as a group of infectious diseases that are caused by Shigella toxin producing E. coli. Furthermore, the inherited diseases Marinesco-Sj?gren syndrome, autosomal dominant polycystic liver disease, Wolcott-Rallison
syndrome, and several cancer types can be considered BiP-related diseases. This review summarizes the physiological and pathophysiological
characteristics of BiP and its interaction partners.
Received 20 November 2008; received after revision 09 December 2008; accepted 12 December 2008 相似文献
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Kalscheuer VM Freude K Musante L Jensen LR Yntema HG Gécz J Sefiani A Hoffmann K Moser B Haas S Gurok U Haesler S Aranda B Nshedjan A Tzschach A Hartmann N Roloff TC Shoichet S Hagens O Tao J Van Bokhoven H Turner G Chelly J Moraine C Fryns JP Nuber U Hoeltzenbein M Scharff C Scherthan H Lenzner S Hamel BC Schweiger S Ropers HH 《Nature genetics》2003,35(4):313-315
We found mutations in the gene PQBP1 in 5 of 29 families with nonsyndromic (MRX) and syndromic (MRXS) forms of X-linked mental retardation (XLMR). Clinical features in affected males include mental retardation, microcephaly, short stature, spastic paraplegia and midline defects. PQBP1 has previously been implicated in the pathogenesis of polyglutamine expansion diseases. Our findings link this gene to XLMR and shed more light on the pathogenesis of this common disorder. 相似文献
15.
It is shown using inside-out membrane vesicles that cattle red cells extrude calcium by means of a calmodulin sensitive Ca-pump whose activity is high in calves and extremely low in adult cows. The decline is not due to loss of calmodulin susceptibility nor to a drop in Ca-affinity. 相似文献
16.
C. Corratgé-Faillie M. Jabnoune S. Zimmermann A.-A. Véry C. Fizames H. Sentenac 《Cellular and molecular life sciences : CMLS》2010,67(15):2511-2532
Bacterial Trk and Ktr, fungal Trk and plant HKT form a family of membrane transporters permeable to K+ and/or Na+ and characterized by a common structure probably derived from an ancestral K+ channel subunit. This transporter family, specific of non-animal cells, displays a large diversity in terms of ionic permeability,
affinity and energetic coupling (H+–K+ or Na+–K+ symport, K+ or Na+ uniport), which might reflect a high need for adaptation in organisms living in fluctuating or dilute environments. Trk/Ktr/HKT
transporters are involved in diverse functions, from K+ or Na+ uptake to membrane potential control, adaptation to osmotic or salt stress, or Na+ recirculation from shoots to roots in plants. Structural analyses of bacterial Ktr point to multimeric structures physically
interacting with regulatory subunits. Elucidation of Trk/Ktr/HKT protein structures along with characterization of mutated
transporters could highlight functional and evolutionary relationships between ion channels and transporters displaying channel-like
features. 相似文献
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Lifestyle transitions in plant pathogenic Colletotrichum fungi deciphered by genome and transcriptome analyses 总被引:8,自引:0,他引:8
RJ O'Connell MR Thon S Hacquard SG Amyotte J Kleemann MF Torres U Damm EA Buiate L Epstein N Alkan J Altmüller L Alvarado-Balderrama CA Bauser C Becker BW Birren Z Chen J Choi JA Crouch JP Duvick MA Farman P Gan D Heiman B Henrissat RJ Howard M Kabbage C Koch B Kracher Y Kubo AD Law MH Lebrun YH Lee I Miyara N Moore U Neumann K Nordström DG Panaccione R Panstruga M Place RH Proctor D Prusky G Rech R Reinhardt JA Rollins S Rounsley CL Schardl DC Schwartz N Shenoy K Shirasu UR Sikhakolli K Stüber 《Nature genetics》2012,44(9):1060-1065
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Summary In this paper the correlation between phosphate incorporation into the regulatory light chain of myosin by a Ca2+-dependent myosin light chain kinase, and the Ca2+-sensitive ATPase activity and superprecipitation behaviour of arterial actomyosin, is described.Acknowledgment. The financial support of the Deutsche Forschungsgemeinschaft (SFB 90) is gratefully acknowledged. 相似文献