排序方式: 共有72条查询结果,搜索用时 46 毫秒
51.
Eric J. R. Jansen Nick H. M. van Bakel Anthon J. M. Coenen Sander H. van Dooren Hermina A. M. van Lith Gerard J. M. Martens 《Cellular and molecular life sciences : CMLS》2010,67(4):629-640
The vacuolar (H+)-ATPase (V-ATPase) is the main regulator of intraorganellar pH and in neuroendocrine cells is controlled by its accessory
subunit, Ac45. Here, we report the discovery of the first isoform of a V-ATPase accessory subunit, namely an Ac45-like protein,
denoted Ac45LP. Phylogenetic analysis revealed a lineage-dependent evolutionary history: Ac45 is absent in birds, and Ac45LP
is absent in placental mammals, whereas all other tetrapod species contain both genes. In contrast to Ac45, Ac45LP is not
proteolytically cleaved, a prerequisite for proper Ac45 routing. Intriguingly, Xenopus Ac45LP mRNA was expressed in developing neural tissue and in neural crest cells. In adult Xenopus, Ac45 mRNA is widely expressed mostly in neuroendocrine tissues, while Ac45LP mRNA expression was found to be restricted
to the kidney and the lung. This novel Ac45LP may provide additional possibilities for V-ATPase regulation during neurodevelopment
as well as in kidney and lung cells. 相似文献
52.
The tetracycline resistome 总被引:2,自引:0,他引:2
Maulik Thaker Peter Spanogiannopoulos Gerard D. Wright 《Cellular and molecular life sciences : CMLS》2010,67(3):419-431
Resistance to tetracycline emerged soon after its discovery six decades ago. Extensive clinical and non-clinical uses of this
class of antibiotic over the years have combined to select for a large number of resistant determinants, collectively termed
the tetracycline resistome. In order to impart resistance, microbes use different molecular mechanisms including target protection,
active efflux, and enzymatic degradation. A deeper understanding of the structure, mechanism, and regulation of the genes
and proteins associated with tetracycline resistance will contribute to the development of tetracycline derivatives that overcome
resistance. Newer generations of tetracyclines derived from engineering of biosynthetic genetic programs, semi-synthesis,
and in particular recent developments in their chemical synthesis, together with a growing understanding of resistance, will
serve to retain this class of antibiotic to combat pathogens. 相似文献
53.
A selective jumonji H3K27 demethylase inhibitor modulates the proinflammatory macrophage response 总被引:1,自引:0,他引:1
L Kruidenier CW Chung Z Cheng J Liddle K Che G Joberty M Bantscheff C Bountra A Bridges H Diallo D Eberhard S Hutchinson E Jones R Katso M Leveridge PK Mander J Mosley C Ramirez-Molina P Rowland CJ Schofield RJ Sheppard JE Smith C Swales R Tanner P Thomas A Tumber G Drewes U Oppermann DJ Patel K Lee DM Wilson 《Nature》2012,488(7411):404-408
54.
Jäger S Cimermancic P Gulbahce N Johnson JR McGovern KE Clarke SC Shales M Mercenne G Pache L Li K Hernandez H Jang GM Roth SL Akiva E Marlett J Stephens M D'Orso I Fernandes J Fahey M Mahon C O'Donoghue AJ Todorovic A Morris JH Maltby DA Alber T Cagney G Bushman FD Young JA Chanda SK Sundquist WI Kortemme T Hernandez RD Craik CS Burlingame A Sali A Frankel AD Krogan NJ 《Nature》2012,481(7381):365-370
Human immunodeficiency virus (HIV) has a small genome and therefore relies heavily on the host cellular machinery to replicate. Identifying which host proteins and complexes come into physical contact with the viral proteins is crucial for a comprehensive understanding of how HIV rewires the host's cellular machinery during the course of infection. Here we report the use of affinity tagging and purification mass spectrometry to determine systematically the physical interactions of all 18 HIV-1 proteins and polyproteins with host proteins in two different human cell lines (HEK293 and Jurkat). Using a quantitative scoring system that we call MiST, we identified with high confidence 497 HIV-human protein-protein interactions involving 435 individual human proteins, with ~40% of the interactions being identified in both cell types. We found that the host proteins hijacked by HIV, especially those found interacting in both cell types, are highly conserved across primates. We uncovered a number of host complexes targeted by viral proteins, including the finding that HIV protease cleaves eIF3d, a subunit of eukaryotic translation initiation factor 3. This host protein is one of eleven identified in this analysis that act to inhibit HIV replication. This data set facilitates a more comprehensive and detailed understanding of how the host machinery is manipulated during the course of HIV infection. 相似文献
55.
56.
Dumitrescu AM Liao XH Abdullah MS Lado-Abeal J Majed FA Moeller LC Boran G Schomburg L Weiss RE Refetoff S 《Nature genetics》2005,37(11):1247-1252
Incorporation of selenocysteine (Sec), through recoding of the UGA stop codon, creates a unique class of proteins. Mice lacking tRNA(Sec) die in utero, but the in vivo role of other components involved in selenoprotein synthesis is unknown, and Sec incorporation defects have not been described in humans. Deiodinases (DIOs) are selenoproteins involved in thyroid hormone metabolism. We identified three of seven siblings with clinical evidence of abnormal thyroid hormone metabolism. Their fibroblasts showed decreased DIO2 enzymatic activity not linked to the DIO2 locus. Systematic linkage analysis of genes involved in DIO2 synthesis and degradation led to the identification of an inherited Sec incorporation defect, caused by a homozygous missense mutation in SECISBP2 (also called SBP2). An unrelated child with a similar phenotype was compound heterozygous with respect to mutations in SECISBP2. Because SBP2 is epistatic to selenoprotein synthesis, these defects had a generalized effect on selenoproteins. Incomplete loss of SBP2 function probably causes the mild phenotype. 相似文献
57.
't Hooft G Susskind L Witten E Fukugita M Randall L Smolin L Stachel J Rovelli C Ellis G Weinberg S Penrose R 《Nature》2005,433(7023):257-259
58.
59.
Gerard H. Fairtlough 《Systemic Practice and Action Research》1991,4(6):547-563
The philosophical basis for Jurgen Habermas' later work is a communicative one: our ability to understand nature, society, and even ourselves arises from our communication with each other. Lifeworld is a key concept in this work, elaborated well beyond the lifeworld concept in the work of, e.g., Schutz. This paper describes Habermas' theory, relating it to his theories of communicative action and of societal steering media. It also suggests some parallels with the work of Vickers and makes proposals for the practical use of Habermas' lifeworld concept. 相似文献
60.
't Hooft G 《Nature》2007,448(7151):271-273
A seemingly temporary solution to almost a century of questions has become one of physics' greatest successes. 相似文献