keyword
MENU ▼
Read by QxMD icon Read
search

Inositol polyphosphate multikinase

keyword
https://www.readbyqxmd.com/read/29331582/inositol-polyphosphates-contribute-to-cellular-circadian-rhythms-implications-for-understanding-lithium-s-molecular-mechanism
#1
Heather Wei, Dominic Landgraf, George Wang, Michael J McCarthy
Most living organisms maintain cell autonomous circadian clocks that synchronize critical biological functions with daily environmental cycles. In mammals, the circadian clock is regulated by inputs from signaling pathways including glycogen synthase kinase 3 (GSK3). The drug lithium has actions on GSK3, and also on inositol metabolism. While it is suspected that lithium's inhibition of GSK3 causes rhythm changes, it is not known if inositol polyphosphates can also affect the circadian clock. We examined whether the signaling molecule inositol hexaphosphate (IP6) has effects on circadian rhythms...
January 10, 2018: Cellular Signalling
https://www.readbyqxmd.com/read/29279301/inositol-polyphosphate-multikinase-inhibits-angiogenesis-via-inositol-pentakisphosphate-induced-hif-1%C3%AE-degradation
#2
Chenglai Fu, Richa Tyagi, Alfred C Chin, Tomas Rojas, Ruo-Jing Li, Prasun Guha, Isaac A Bernstein, Feng Rao, Risheng Xu, Jiyoung Y Cha, Jing Xu, Adele M Snowman, Gregg L Semenza, Solomon H Snyder
Rationale: Inositol polyphosphate multikinase (IPMK) and its major product inositol pentakisphosphate (IP5) regulate a variety of cellular functions, but their role in vascular biology remains unexplored. Objective: We have investigated the role of IPMK in regulating angiogenesis. Methods and Results: Deletion of IPMK in fibroblasts induces angiogenesis in both in vitro and in vivo models. IPMK deletion elicits a substantial increase of vascular endothelial growth factor (VEGF), which mediates the regulation of angiogenesis by IPMK...
December 26, 2017: Circulation Research
https://www.readbyqxmd.com/read/29242514/dna-damage-causes-rapid-accumulation-of-phosphoinositides-for-atr%C3%A2-signaling
#3
Yu-Hsiu Wang, Anushya Hariharan, Giulia Bastianello, Yusuke Toyama, G V Shivashankar, Marco Foiani, Michael P Sheetz
Phosphoinositide lipids (PPIs) are enriched in the nucleus and are accumulated at DNA damage sites. Here, we investigate roles of nuclear PPIs in DNA damage response by sequestering specific PPIs with the expression of nuclear-targeted PH domains, which inhibits recruitment of Ataxia telangiectasia and Rad3-related protein (ATR) and reduces activation of Chk1. PPI-binding domains rapidly (< 1 s) accumulate at damage sites with local enrichment of PPIs. Accumulation of PIP3 in complex with the nuclear receptor protein, SF1, at damage sites requires phosphorylation by inositol polyphosphate multikinase (IPMK) and promotes nuclear actin assembly that is required for ATR recruitment...
December 14, 2017: Nature Communications
https://www.readbyqxmd.com/read/29161428/arabidopsis-inositol-polyphosphate-multikinase-delays-flowering-time-through-mediating-transcriptional-activation-of-flowering-locus-c
#4
Sihong Sang, Yao Chen, Qiaofeng Yang, Peng Wang
Timely flowering is critical for successful reproduction and seed yield in plants. A diverse range of regulators have been found to control flowering time in response to environmental and endogenous signals. Among these regulators, FLOWERING LOCUS C (FLC) acts as a central repressor of floral transition by blocking the expression of flowering integrator genes. Here, we report that Arabidopsis inositol polyphosphate multikinase (AtIPK2β) functions in flowering time control by mediating transcriptional regulation of FLC at the chromatin level...
November 17, 2017: Journal of Experimental Botany
https://www.readbyqxmd.com/read/28923943/-psi-prion-propagation-is-controlled-by-inositol-polyphosphates
#5
Reed B Wickner, Amy C Kelly, Evgeny E Bezsonov, Herman K Edskes
The yeast prions [PSI+] and [URE3] are folded in-register parallel β-sheet amyloids of Sup35p and Ure2p, respectively. In a screen for antiprion systems curing [PSI+] without protein overproduction, we detected Siw14p as an antiprion element. An array of genetic tests confirmed that many variants of [PSI+] arising in the absence of Siw14p are cured by restoring normal levels of the protein. Siw14p is a pyrophosphatase specifically cleaving the β phosphate from 5-diphosphoinositol pentakisphosphate (5PP-IP5), suggesting that increased levels of this or some other inositol polyphosphate favors [PSI+] propagation...
October 3, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28792096/the-inositol-pyrophosphate-synthesis-pathway-in-trypanosoma-brucei-is-linked-to-polyphosphate-synthesis-in-acidocalcisomes
#6
Ciro D Cordeiro, Adolfo Saiardi, Roberto Docampo
Inositol pyrophosphates are novel signaling molecules possessing high-energy pyrophosphate bonds and involved in a number of biological functions. Here, we report the correct identification and characterization of the kinases involved in the inositol pyrophosphate biosynthetic pathway in Trypanosoma brucei: inositol polyphosphate multikinase (TbIPMK), inositol pentakisphosphate 2-kinase (TbIP5K) and inositol hexakisphosphate kinase (TbIP6K). TbIP5K and TbIP6K were not identifiable by sequence alone and their activities were validated by enzymatic assays with the recombinant proteins or by their complementation of yeast mutants...
October 2017: Molecular Microbiology
https://www.readbyqxmd.com/read/28554203/the-expanding-significance-of-inositol-polyphosphate-multikinase-as-a-signaling-hub
#7
REVIEW
Eunha Kim, Hyoungjoon Ahn, Min Gyu Kim, Haein Lee, Seyun Kim
The inositol polyphosphates are a group of multifunctional signaling metabolites whose synthesis is catalyzed by a family of inositol kinases that are evolutionarily conserved from yeast to humans. Inositol polyphosphate multikinase (IPMK) was first identified as a subunit of the arginine-responsive transcription complex in budding yeast. In addition to its role in the production of inositol tetrakis- and pentakisphosphates (IP4 and IP5), IPMK also exhibits phosphatidylinositol 3-kinase (PI3-kinase) activity...
May 31, 2017: Molecules and Cells
https://www.readbyqxmd.com/read/28501915/role-of-the-inositol-polyphosphate-multikinase-ipk2-in-regulation-of-hyphal-development-calcium-signaling-and-secretion-in-candida-albicans
#8
Jianrong Li, Bing Zhang, Tianyu Ma, Honggang Wang, Biao Zhang, Qilin Yu, Mingchun Li
Inositol polyphosphates are a family of inositol derivatives and ubiquitously distributed in various organisms. Their generation is catalyzed by inositol polyphosphate multikinases, which play essential roles in abundant cellular processes. However, little is known about the kinds and functions of inositol polyphosphate multikinases in the important fungal pathogen, C. albicans. In this study, we identified a C. albicans inositol polyphosphate multikinase, Ipk2. This kinase shares the conserved IPK domain and localizes in the nucleus...
August 2017: Mycopathologia
https://www.readbyqxmd.com/read/28439546/inositol-polyphosphate-multikinase-promotes-toll-like-receptor-induced-inflammation-by-stabilizing-traf6
#9
Eunha Kim, Jiyoon Beon, Seulgi Lee, Seung Ju Park, Hyoungjoon Ahn, Min Gyu Kim, Jeong Eun Park, Wooseob Kim, Jae-Min Yuk, Suk-Jo Kang, Seung-Hyo Lee, Eun-Kyeong Jo, Rho Hyun Seong, Seyun Kim
Toll-like receptor (TLR) signaling is tightly controlled to protect hosts from microorganisms while simultaneously preventing uncontrolled immune responses. Tumor necrosis factor receptor-associated factor 6 (TRAF6) is a critical mediator of TLR signaling, but the precise mechanism of how TRAF6 protein stability is strictly controlled still remains obscure. We show that myeloid-specific deletion of inositol polyphosphate multikinase (IPMK), which has both inositol polyphosphate kinase activities and noncatalytic signaling functions, protects mice against polymicrobial sepsis and lipopolysaccharide-induced systemic inflammation...
April 2017: Science Advances
https://www.readbyqxmd.com/read/27825921/familial-small-intestine-carcinoids-chromosomal-alterations-and-germline-inositol-polyphosphate-multikinase-sequencing
#10
Louis de Mestier, Eric Pasmant, Clémence Fleury, Hedia Brixi, Pierre Sohier, Thomas Féron, Marie-Danièle Diebold, Eric Clauser, Guillaume Cadiot
BACKGROUND: Familial small-intestine neuroendocrine tumors (SI-NETs) are an exceptional inherited entity. Underlying predisposing mechanisms are unelucidated, but inositol polyphosphate multikinase (IPMK) gene alterations might promote their tumorigenesis. METHODS: A retrospective-prospective nationwide cohort was constituted, by including patients with proven SI-NETs and at least one relative with the same disease. We performed constitutional and somatic IPMK sequencing, and somatic DNA comparative genomic hybridization (CGH)...
January 2017: Digestive and Liver Disease
https://www.readbyqxmd.com/read/27776973/plc-%C3%AE-1-and-cell-differentiation-an-insight-into-myogenesis-and-osteogenesis
#11
REVIEW
Giulia Ramazzotti, Irene Faenza, Roberta Fiume, Anna Maria Billi, Lucia Manzoli, Sara Mongiorgi, Stefano Ratti, James A McCubrey, Pann-Ghill Suh, Lucio Cocco, Matilde Y Follo
Phosphoinositide-phospholipase C-β1 (PLC-β1) plays a crucial role in the initiation of the genetic program responsible for muscle differentiation and osteogenesis. During myogenic differentiation of murine C2C12 myoblasts, PLC-β1 signaling pathway involves the Inositol Polyphosphate Multikinase (IPMK) and β-catenin as downstream effectors. By means of c-jun binding to cyclin D3 promoter, the activation of PLC-β1 pathway determines cyclin D3 accumulation. However, osteogenesis requires PLC-β1 expression and up-regulation but it does not affect cyclin D3 levels, suggesting that the two processes require the activation of different mediators...
October 18, 2016: Advances in Biological Regulation
https://www.readbyqxmd.com/read/27563828/ipmk-and-%C3%AE-catenin-mediate-plc-%C3%AE-1-dependent-signaling-in-myogenic-differentiation
#12
Giulia Ramazzotti, Anna Maria Billi, Lucia Manzoli, Cristina Mazzetti, Alessandra Ruggeri, Christophe Erneux, Seyun Kim, Pann-Ghill Suh, Lucio Cocco, Irene Faenza
In previous studies, we have reported that phospholipase C (PLC)-β1 plays a crucial role in myogenic differentiation and we determined the importance of its catalytic activity for the initiation of this process. Here we define the effectors that take part to its signaling pathway. We show that the Inositol Polyphosphate Multikinase (IPMK) is able to promote myogenic differentiation since its overexpression determines the up-regulation of several myogenic markers. Moreover, we demonstrate that IPMK activates the same cyclin D3 promoter region targeted by PLC-β1 and that IPMK-induced promoter activation relies upon c-jun binding to the promoter, as we have shown previously for PLC-β1...
December 20, 2016: Oncotarget
https://www.readbyqxmd.com/read/27133314/chemogenetic-characterization-of-inositol-phosphate-metabolic-pathway-reveals-druggable-enzymes-for-targeting-kinetoplastid-parasites
#13
Igor Cestari, Paige Haas, Nilmar Silvio Moretti, Sergio Schenkman, Ken Stuart
Kinetoplastids cause Chagas disease, human African trypanosomiasis, and leishmaniases. Current treatments for these diseases are toxic and inefficient, and our limited knowledge of drug targets and inhibitors has dramatically hindered the development of new drugs. Here we used a chemogenetic approach to identify new kinetoplastid drug targets and inhibitors. We conditionally knocked down Trypanosoma brucei inositol phosphate (IP) pathway genes and showed that almost every pathway step is essential for parasite growth and infection...
May 19, 2016: Cell Chemical Biology
https://www.readbyqxmd.com/read/26862216/inositol-polyphosphate-multikinase-ipmk-in-transcriptional-regulation-and-nuclear-inositide-metabolism
#14
REVIEW
M Merced Malabanan, Raymond D Blind
Inositol polyphosphate multikinase (IPMK, ipk2, Arg(82), ArgRIII) is an inositide kinase with unusually flexible substrate specificity and the capacity to partake in many functional protein-protein interactions (PPIs). By merging these two activities, IPMK is able to execute gene regulatory functions that are very unique and only now beginning to be recognized. In this short review, we present a brief history of IPMK, describe the structural biology of the enzyme and highlight a few recent discoveries that have shed more light on the role IPMK plays in inositide metabolism, nuclear signalling and transcriptional regulation...
February 2016: Biochemical Society Transactions
https://www.readbyqxmd.com/read/26682649/ipmk-a-versatile-regulator-of-nuclear-signaling-events
#15
REVIEW
Eunha Kim, Jiyoon Beon, Seulgi Lee, Jina Park, Seyun Kim
Inositol-derived metabolites (e.g., phosphoinositides and inositol polyphosphates) are key second messengers that are essential for controlling a wide range of cellular events. Inositol polyphosphate multikinase (IPMK) exhibits complex catalytic activities that eventually yield water-soluble inositol polyphosphates (e.g., IP4 and IP5) and lipid-bound phosphatidylinositol 3,4,5-trisphosphate. A series of recent studies have suggested that IPMK may be a multifunctional regulator in the nucleus of mammalian cells...
May 2016: Advances in Biological Regulation
https://www.readbyqxmd.com/read/26195796/huntington-s-disease-neural-dysfunction-linked-to-inositol-polyphosphate-multikinase
#16
Ishrat Ahmed, Juan I Sbodio, Maged M Harraz, Richa Tyagi, Jonathan C Grima, Lauren K Albacarys, Maimon E Hubbi, Risheng Xu, Seyun Kim, Bindu D Paul, Solomon H Snyder
Huntington's disease (HD) is a progressive neurodegenerative disease caused by a glutamine repeat expansion in mutant huntingtin (mHtt). Despite the known genetic cause of HD, the pathophysiology of this disease remains to be elucidated. Inositol polyphosphate multikinase (IPMK) is an enzyme that displays soluble inositol phosphate kinase activity, lipid kinase activity, and various noncatalytic interactions. We report a severe loss of IPMK in the striatum of HD patients and in several cellular and animal models of the disease...
August 4, 2015: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/25865046/a-hereditary-form-of-small-intestinal-carcinoid-associated-with-a-germline-mutation-in-inositol-polyphosphate-multikinase
#17
Yoshitatsu Sei, Xilin Zhao, Joanne Forbes, Silke Szymczak, Qing Li, Apurva Trivedi, Mark Voellinger, Grishma Joy, Jianying Feng, Millie Whatley, MaryPat Sussex Jones, Ursula L Harper, Stephen J Marx, Aradhana M Venkatesan, Settara C Chandrasekharappa, Mark Raffeld, Martha M Quezado, Adeline Louie, Clara C Chen, Ramona M Lim, Richa Agarwala, Alejandro A Schäffer, Marybeth S Hughes, Joan E Bailey-Wilson, Stephen A Wank
BACKGROUND & AIMS: Small intestinal carcinoids are rare and difficult to diagnose and patients often present with advanced incurable disease. Although the disease occurs sporadically, there have been reports of family clusters. Hereditary small intestinal carcinoid has not been recognized and genetic factors have not been identified. We performed a genetic analysis of families with small intestinal carcinoids to establish a hereditary basis and find genes that might cause this cancer...
July 2015: Gastroenterology
https://www.readbyqxmd.com/read/25370490/comparative-genomics-of-pneumocystis-species-suggests-the-absence-of-genes-for-myo-inositol-synthesis-and-reliance-on-inositol-transport-and-metabolism
#18
COMPARATIVE STUDY
Aleksey Porollo, Thomas M Sesterhenn, Margaret S Collins, Jeffrey A Welge, Melanie T Cushion
UNLABELLED: In the context of deciphering the metabolic strategies of the obligate pathogenic fungi in the genus Pneumocystis, the genomes of three species (P. carinii, P. murina, and P. jirovecii) were compared among themselves and with the free-living, phylogenetically related fission yeast (Schizosaccharomyces pombe). The underrepresentation of amino acid metabolism pathways compared to those in S. pombe, as well as the incomplete steroid biosynthesis pathway, were confirmed for P...
November 4, 2014: MBio
https://www.readbyqxmd.com/read/24877601/convergence-of-ipmk-and-lkb1-ampk-signaling-pathways-on-metformin-action
#19
Sookhee Bang, Yong Chen, Rexford S Ahima, Sangwon F Kim
Metformin is a biguanide drug that is widely prescribed for type 2 diabetes. Metformin suppresses hepatic gluconeogenesis and increases fatty acid oxidation. Although studies have suggested that metformin acts, at least in part, via activation of the liver kinase B1 (LKB1)/AMP-activated protein kinase (AMPK) pathway, the specific molecular mechanisms underlying metformin's regulation of glucose and lipid metabolism have not been well delineated. Recently, we have shown that inositol polyphosphate multikinase (IPMK) plays an important role in cellular energy metabolism and glucose-mediated AMPK regulation...
July 2014: Molecular Endocrinology
https://www.readbyqxmd.com/read/24670057/inositol-phosphates-induce-dapi-fluorescence-shift
#20
Bernadett Kolozsvari, Federica Parisi, Adolfo Saiardi
The polymer inorganic polyP (polyphosphate) and inositol phosphates, such as IP6 (inositol hexakisphosphate; also known as phytic acid), share many biophysical features. These similarities must be attributed to the phosphate groups present in these molecules. Given the ability of polyP to modify the excitation-emission spectra of DAPI we decided to investigate whether inositol phosphates possess the same property. We discovered that DAPI-IP6 complexes emit at approximately 550 nm when excited with light of wavelength 410-420 nm...
June 15, 2014: Biochemical Journal
keyword
keyword
51684
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"