keyword
MENU ▼
Read by QxMD icon Read
search

importin

keyword
https://www.readbyqxmd.com/read/28942281/antihypertrophic-effects-of-small-molecules-that-maintain-mitochondrial-atp-levels-under-hypoxia
#1
Hiroaki Nagai, Tomoko Satomi, Akiko Abiru, Kazumasa Miyamoto, Koji Nagasawa, Minoru Maruyama, Satoshi Yamamoto, Kuniko Kikuchi, Hiromitsu Fuse, Masakuni Noda, Yoshiyuki Tsujihata
Since impaired mitochondrial ATP production in cardiomyocytes is thought to lead to heart failure, a drug that protects mitochondria and improves ATP production under disease conditions would be an attractive treatment option. In this study, we identified small-molecule drugs, including the anti-parasitic agent, ivermectin, that maintain mitochondrial ATP levels under hypoxia in cardiomyocytes. Mechanistically, transcriptomic analysis and gene silencing experiments revealed that ivermectin increased mitochondrial ATP production by inducing Cox6a2, a subunit of the mitochondrial respiratory chain...
September 19, 2017: EBioMedicine
https://www.readbyqxmd.com/read/28939615/regulation-of-mitotic-spindle-assembly-factor-numa-by-importin-%C3%AE
#2
Chih-Chia Chang, Tzu-Lun Huang, Yuta Shimamoto, Su-Yi Tsai, Kuo-Chiang Hsia
Ran-guanosine triphosphatase orchestrates mitotic spindle assembly by modulation of the interaction between Importin-α/-β and spindle assembly factors (SAFs). The inhibition of SAFs performed by importins needs to be done without much sequestration from abundant nuclear localization signal (NLS) -containing proteins. However, the molecular mechanisms that determine NLS-binding selectivity and that inhibit activity of Importin-β-regulated SAFs (e.g., nuclear mitotic apparatus protein [NuMA]) remain undefined...
September 22, 2017: Journal of Cell Biology
https://www.readbyqxmd.com/read/28931593/active-ran-regulates-anillin-function-during-cytokinesis
#3
Daniel Beaudet, Tara Akhshi, Julia Phillipp, Christopher Law, Alisa Piekny
Cytokinesis cleaves a cell into two daughters at the end of mitosis, and must be spatially coordinated with chromosome segregation to prevent aneuploidy. The dogma is that the mitotic spindle governs the assembly and constriction of an actomyosin ring. Here, we reveal a function for active Ran in spatially restricting the ring. Our model is that during anaphase, 'free' importins, whose gradient inversely correlates with active Ran and chromatin position, function as a molecular ruler for the recruitment and localization of anillin, a contractile protein and crucial regulator of cytokinesis...
September 20, 2017: Molecular Biology of the Cell
https://www.readbyqxmd.com/read/28930673/pexrap-inhibits-prdm16-mediated-thermogenic-gene-expression
#4
Irfan J Lodhi, John M Dean, Anyuan He, Hongsuk Park, Min Tan, Chu Feng, Haowei Song, Fong-Fu Hsu, Clay F Semenkovich
How the nuclear receptor PPARγ regulates the development of two functionally distinct types of adipose tissue, brown and white fat, as well as the browning of white fat, remains unclear. Our previous studies suggest that PexRAP, a peroxisomal lipid synthetic enzyme, regulates PPARγ signaling and white adipogenesis. Here, we show that PexRAP is an inhibitor of brown adipocyte gene expression. PexRAP inactivation promoted adipocyte browning, increased energy expenditure, and decreased adiposity. Identification of PexRAP-interacting proteins suggests that PexRAP function extends beyond its role as a lipid synthetic enzyme...
September 19, 2017: Cell Reports
https://www.readbyqxmd.com/read/28920551/a-comprehensive-in-silico-analysis-of-huntingtin-and-its-interactome
#5
Valentina Brandi, Valentina Di Lella, Maria Marino, Paolo Ascenzi, Fabio Polticelli
A polyglutamine expansion of the N-terminal region of huntingtin (Htt) causes Huntington's disease (HD), a severe neurodegenerative disorder. Htt huge multidomain structure, the presence of disordered regions, and the lack of sequence homologs of known structure, so far prevented structural studies of Htt, making the study of its structure-function relationships very difficult. In this work, the presence and location of five Htt ordered domains (named from Hunt1 to Hunt5) has been detected and the structure of these domains has been predicted for the first time using a combined threading/ab initio modelling approach...
September 18, 2017: Journal of Biomolecular Structure & Dynamics
https://www.readbyqxmd.com/read/28915577/vorinostat-suppresses-hypoxia-signaling-by-modulating-nuclear-translocation-of-hypoxia-inducible-factor-1-alpha
#6
Chao Zhang, Chunzhang Yang, Michael J Feldman, Herui Wang, Ying Pang, Dominic M Maggio, Dongwang Zhu, Cody L Nesvick, Pauline Dmitriev, Petra Bullova, Prashant Chittiboina, Roscoe O Brady, Karel Pacak, Zhengping Zhuang
Histone deacetylase inhibitors (HDACis) are a potent class of tumor-suppressive agents traditionally believed to exert their effects through loosening tightly-wound chromatin resulting in de-inhibition of various tumor suppressive genes. Recent literature however has shown altered intratumoral hypoxia signaling with HDACi administration not attributable to changes in chromatin structure. We sought to determine the precise mechanism of HDACi-mediated hypoxia signaling attenuation using vorinostat (SAHA), an FDA-approved class I/IIb/IV HDACi...
August 22, 2017: Oncotarget
https://www.readbyqxmd.com/read/28901644/the-truncated-nlr-protein-tir-nbs13-is-a-mos6-importin-%C3%AE-3-interaction-partner-and-required-for-plant-immunity
#7
Charlotte Roth, Daniel Lüdke, Melanie Klenke, Annalena Quathamer, Oliver Valerius, Gerhard H Braus, Marcel Wiermer
Importin-α proteins mediate the translocation of nuclear localization signal (NLS)-containing proteins from the cytoplasm into the nucleus through nuclear pore complexes (NPCs). Genetically, Arabidopsis IMPORTIN-α3/MOS6 (MODIFIER OF SNC1, 6) is required for basal plant immunity and constitutive disease resistance activated in the auto-immune mutant snc1 (suppressor of npr1-1, constitutive 1), suggesting that MOS6 plays a role in nuclear import of proteins involved in plant defense signaling. Here, we sought to identify and characterize defense-regulatory cargo proteins and interaction partners of MOS6...
September 13, 2017: Plant Journal: for Cell and Molecular Biology
https://www.readbyqxmd.com/read/28900157/synergy-of-two-low-affinity-nlss-determines-the-high-avidity-of-influenza-a-virus-nucleoprotein-np-for-human-importin-%C3%AE-isoforms
#8
Wei Wu, Rajeshwer S Sankhala, Tyler J Florio, Lixin Zhou, Nhan L T Nguyen, Ravi K Lokareddy, Gino Cingolani, Nelly Panté
The influenza A virus nucleoprotein (NP) is an essential multifunctional protein that encapsidates the viral genome and functions as an adapter between the virus and the host cell machinery. NPs from all strains of influenza A viruses contain two nuclear localization signals (NLSs): a well-studied monopartite NLS1 and a less-characterized NLS2, thought to be bipartite. Through site-directed mutagenesis and functional analysis, we found that NLS2 is also monopartite and is indispensable for viral infection. Atomic structures of importin α bound to two variants of NLS2 revealed NLS2 primarily binds the major-NLS binding site of importin α, unlike NLS1 that associates with the minor NLS-pocket...
September 12, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28873410/n-terminally-truncated-pom121c-inhibits-hiv-1-replication
#9
Hideki Saito, Hiroaki Takeuchi, Takao Masuda, Takeshi Noda, Shoji Yamaoka
Recent studies have identified host cell factors that regulate early stages of HIV-1 infection including viral cDNA synthesis and orientation of the HIV-1 capsid (CA) core toward the nuclear envelope, but it remains unclear how viral DNA is imported through the nuclear pore and guided to the host chromosomal DNA. Here, we demonstrate that N-terminally truncated POM121C, a component of the nuclear pore complex, blocks HIV-1 infection. This truncated protein is predominantly localized in the cytoplasm, does not bind to CA, does not affect viral cDNA synthesis, reduces the formation of 2-LTR and diminished the amount of integrated proviral DNA...
2017: PloS One
https://www.readbyqxmd.com/read/28852774/mechanisms-of-ciliary-targeting-entering-importins-and-rabs
#10
REVIEW
Lei Lu, Viswanadh Madugula
Primary cilium is a rod-like plasma membrane protrusion that plays important roles in sensing the cellular environment and initiating corresponding signaling pathways. The sensory functions of the cilium critically depend on the unique enrichment of ciliary residents, which is maintained by the ciliary diffusion barrier. It is still unclear how ciliary cargoes specifically enter the diffusion barrier and accumulate within the cilium. In this review, the organization and trafficking mechanism of the cilium are compared to those of the nucleus, which are much better understood at the moment...
August 29, 2017: Cellular and Molecular Life Sciences: CMLS
https://www.readbyqxmd.com/read/28852008/retrograde-trafficking-of-%C3%AE-dystroglycan-from-the-plasma-membrane-to-the-nucleus
#11
Viridiana Gracida-Jiménez, Ricardo Mondragón-González, Griselda Vélez-Aguilera, Alejandra Vásquez-Limeta, Marco S Laredo-Cisneros, Juan de Dios Gómez-López, Luis Vaca, Sarah C Gourlay, Laura A Jacobs, Steve J Winder, Bulmaro Cisneros
β-Dystroglycan (β-DG) is a transmembrane protein with critical roles in cell adhesion, cytoskeleton remodeling and nuclear architecture. This functional diversity is attributed to the ability of β-DG to target to, and conform specific protein assemblies at the plasma membrane (PM) and nuclear envelope (NE). Although a classical NLS and importin α/β mediated nuclear import pathway has already been described for β-DG, the intracellular trafficking route by which β-DG reaches the nucleus is unknown. In this study, we demonstrated that β-DG undergoes retrograde intracellular trafficking from the PM to the nucleus via the endosome-ER network...
August 29, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28837617/structural-characterisation-of-tnrc6a-nuclear-localisation-signal-in-complex-with-importin-alpha
#12
Jessica J Chaston, Alastair Gordon Stewart, Mary Christie
The GW182/TNRC6 family of proteins are central scaffolds that link microRNA-associated Argonaute proteins to the cytoplasmic decay machinery for targeted mRNA degradation processes. Although nuclear roles for the GW182/TNRC6 proteins are unknown, recent reports have demonstrated nucleocytoplasmic shuttling activity that utilises the importin-α and importin-β transport receptors for nuclear translocation. Here we describe the structure of mouse importin-α in complex with the TNRC6A nuclear localisation signal peptide...
2017: PloS One
https://www.readbyqxmd.com/read/28835592/importin-%C3%AE-importin-%C3%AE-complex-mediated-nuclear-translocation-of-insulin-like-growth-factor-binding-protein-5
#13
Min Sun, Juan Long, Yuxin Yi, Wei Xia
Insulin-like growth factor-binding protein (IGFBP)-5 is a secreted protein that binds to IGFs and modulates IGF actions, as well as regulates cell proliferation, migration, and apoptosis independent of IGF. Proper cellular localization is critical for the effective function of most signaling molecules. In previous studies, we have shown that the nuclear IGFBP-5 comes from ER-cytosol retro-translocation. In this study, we further investigated the pathway mediating IGFBP-5 nuclear import after it retro-translocation...
August 23, 2017: Endocrine Journal
https://www.readbyqxmd.com/read/28822708/mrtf-a-mir-206-wdr1-form-feedback-loop-to-regulate-breast-cancer-cell-migration
#14
Yuan Xiang, Xing-Hua Liao, Ao Yao, Huan Qin, Li-Juan Fan, Jia-Peng Li, Peng Hu, Hui Li, Wei Guo, Jun-Yan Li, Chao-Jiang Gu, Le-Yuan Bao, Tong-Cun Zhang
Breast cancer is the leading cause of cancer death in women worldwide which is closely related to metastasis. Our previous study has shown that MRTF-A promote the migration of MDA-MB-231 cells and WDR1 promotes breast cancer cell migration. But the exact molecular mechanism on metastasis is still not fully understood, we now report that WDR1 enhanced the effect of MRTF-A induced-MDA-MB-231 cell migration by promoting the expression of the EMT markers and migration markers via RhoA-MRTF-A signaling pathway. Importantly, WDR1 promoted the nuclear importion of MRTF-A by affecting the expression of nuclear transport protein importin...
August 17, 2017: Experimental Cell Research
https://www.readbyqxmd.com/read/28820290/local-histone-acetylation-by-acss2-promotes-gene-transcription-for-lysosomal-biogenesis-and-autophagy
#15
Xinjian Li, Xu Qian, Zhimin Lu
Overcoming metabolic stress is a critical step in tumorigenesis. Acetyl coenzyme A (acetyl-CoA) converted from glucose or acetate is a substrate used for histone acetylation to regulate gene expression. However, how acetyl-CoA is produced under nutritional stress conditions is unclear. Herein we report that nutritional stress induces nuclear translocation of ACSS2 (acyl-CoA synthetase short-chain family member 2). This translocation is mediated by AMP-activated protein kinase (AMPK)-dependent ACSS2 Ser659 phosphorylation and subsequent exposure of the nuclear localization signal of ACSS2 to KPNA1/importin α5 for binding...
August 18, 2017: Autophagy
https://www.readbyqxmd.com/read/28791516/nlscore-a-novel-quantitative-algorithm-based-on-3-dimensional-structural-determinants-to-predict-the-probability-of-nuclear-localization-in-proteins-containing-classical-nuclear-localization-signals
#16
P S Hari, T S Sridhar, R Pravin Kumar
The presence of a nuclear localization signal (NLS) in proteins can be inferred by the presence of a stretch of basic amino acids (KRKK). These NLSs are termed classical NLS (cNLS). However, only a fraction of proteins containing the cNLS pattern are transported into the nucleus by binding to importin α. Hence, there must exist, additional structural determinants that guide the appropriate interaction between putative NLSs containing cargo and importin α. Using 52 protein structures containing cNLS obtained from RCSB PDB, we assembled a training set and a validation set such that both sets were comprised of a combination of proteins with proven nuclear localization and ones that were non-nuclear...
August 9, 2017: Journal of Molecular Modeling
https://www.readbyqxmd.com/read/28783661/citrullination-of-nf-%C3%AE%C2%BAb-p65-promotes-its-nuclear-localization-and-tlr-induced-expression-of-il-1%C3%AE-and-tnf%C3%AE
#17
Bo Sun, Nishant Dwivedi, Tyler J Bechtel, Janet L Paulsen, Aaron Muth, Mandar Bawadekar, Gang Li, Paul R Thompson, Miriam A Shelef, Celia A Schiffer, Eranthie Weerapana, I-Cheng Ho
Many citrullinated proteins are known autoantigens in rheumatoid arthritis, a disease mediated by inflammatory cytokines, such as tumor necrosis factor-α (TNFα). Citrullinated proteins are generated by converting peptidylarginine to peptidylcitrulline, a process catalyzed by the peptidylarginine deiminases (PADs), including PAD1 to PAD4 and PAD6. Several major risk factors for rheumatoid arthritis are associated with heightened citrullination. However, the physiological role of citrullination in immune cells is poorly understood...
June 9, 2017: Science Immunology
https://www.readbyqxmd.com/read/28760339/crystal-structure-of-importin-%C3%AE-3-bound-to-the-nuclear-localization-signal-of-ran-binding-protein-3
#18
Masako Koyama, Yoshiyuki Matsuura
Ran-binding protein 3 (RanBP3) is a primarily nuclear Ran-binding protein that functions as an accessory factor in the Ran GTPase system. RanBP3 associates with Ran-specific nucleotide exchange factor RCC1 and enhances its catalytic activity towards Ran. RanBP3 also promotes CRM1-mediated nuclear export as well as CRM1-independent nuclear export of β-catenin, Smad2, and Smad3. Nuclear import of RanBP3 is dependent on the nuclear import adaptor protein importin-α and, RanBP3 is imported more efficiently by importin-α3 than by other members of the importin-α family...
September 23, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28754769/correction-for-zehorai-and-seger-beta-like-importins-mediate-the-nuclear-translocation-of-mitogen-activated-protein-kinases
#19
Eldar Zehorai, Rony Seger
No abstract text is available yet for this article.
August 15, 2017: Molecular and Cellular Biology
https://www.readbyqxmd.com/read/28747316/mitotic-nuclear-pore-complex-segregation-involves-nup2-in-aspergillus-nidulans
#20
Subbulakshmi Suresh, Sarine Markossian, Aysha H Osmani, Stephen A Osmani
Transport through nuclear pore complexes (NPCs) during interphase is facilitated by the nucleoporin Nup2 via its importin α- and Ran-binding domains. However, Aspergillus nidulans and vertebrate Nup2 also locate to chromatin during mitosis, suggestive of mitotic functions. In this study, we report that Nup2 is required for mitotic NPC inheritance in A. nidulans Interestingly, the role of Nup2 during mitotic NPC segregation is independent of its importin α- and Ran-binding domains but relies on a central targeting domain that is necessary for localization and viability...
September 4, 2017: Journal of Cell Biology
keyword
keyword
70002
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"