Abstract:
:AMPK (AMP-activated protein kinase) is a cellular energy sensor that monitors the ratio of AMP/ATP, and possibly also ADP/ATP, inside cells. Once activated by falling cellular energy levels, it acts to restore energy homoeostasis by switching on catabolic pathways that generate ATP, while switching off anabolic pathways and other processes consuming ATP. AMPK is switched on by increases in AMP via three mechanisms, all of which are antagonized by ATP: (i) promotion of phosphorylation of Thr172 by upstream activating kinases; (ii) inhibition of dephosphorylation of Thr172 by phosphatases; and (iii) allosteric activation of the phosphorylated kinase. Recently, it has been proposed that the first two mechanisms are also triggered by ADP, which might be the physiological signal rather than AMP, and that the third mechanism may not be physiologically significant. We have re-evaluated these questions, and found that only mechanism (ii) is mimicked by ADP, and that ADP is also less potent than AMP, which we still believe to be the primary signal. We have also provided evidence that mechanism (iii), i.e. allosteric activation by AMP, is a quantitatively significant mechanism in intact cells.
journal_name
Biochem Soc Transjournal_title
Biochemical Society transactionsauthors
Gowans GJ,Hardie DGdoi
10.1042/BST20130244subject
Has Abstractpub_date
2014-02-01 00:00:00pages
71-5issue
1eissn
0300-5127issn
1470-8752pii
BST20130244journal_volume
42pub_type
杂志文章abstract::Voltage-gated K(+) channels are key regulators of neuronal excitability. The Kv2.1 voltage-gated K(+) channel is the major delayed rectifier K(+) channel expressed in most central neurons, where it exists as a highly phosphorylated protein. Kv2.1 plays a critical role in homoeostatic regulation of intrinsic neuronal e...
journal_title:Biochemical Society transactions
pub_type: 杂志文章,评审
doi:10.1042/BST0351064
更新日期:2007-11-01 00:00:00
abstract::RDCs (residual dipolar couplings) in NMR spectroscopy provide information about protein dynamics complementary to NMR relaxation methods, especially in the previously inaccessible time window between the protein correlation time tau(c) and 50 micros. For ubiquitin, new modes of motion of the protein backbone could be ...
journal_title:Biochemical Society transactions
pub_type: 杂志文章,评审
doi:10.1042/BST0361433
更新日期:2008-12-01 00:00:00
abstract::Prelamin A is the precursor protein of lamin A, a major constituent of the nuclear lamina in higher eukaryotes. Increasing attention to prelamin A processing and function has been given after the discovery, from 2002 to 2004, of diseases caused by prelamin A accumulation. These diseases, belonging to the group of lami...
journal_title:Biochemical Society transactions
pub_type: 杂志文章,评审
doi:10.1042/BST20110657
更新日期:2011-12-01 00:00:00
abstract::Bloom's syndrome (BS) is a rare autosomal recessive disorder characterized by genomic instability and cancer predisposition. The underlying genetic defect is mutation of the BLM gene, producing deficiency in the RecQ helicase BLM (Bloom's syndrome protein). The present article begins by introducing BLM and its binding...
journal_title:Biochemical Society transactions
pub_type: 杂志文章
doi:10.1042/BST0370553
更新日期:2009-06-01 00:00:00
abstract::The translocator protein (18 kDa) (TSPO) resides on the outer mitochondrial membrane where it is believed to participate in cholesterol transport and steroid hormone synthesis. Although it is almost ubiquitously expressed, what TSPO does in non-steroidogenic tissues is largely unexplored. Recent studies report changes...
journal_title:Biochemical Society transactions
pub_type: 杂志文章,评审
doi:10.1042/BST20150019
更新日期:2015-08-01 00:00:00
abstract::Rapid interphase chromosome territory repositioning appears to function through the action of nuclear myosin and actin, in a nuclear motor complex. We have found that chromosome repositioning when cells leave the cell cycle is not apparent in cells that have mutant lamin A or that are lacking emerin. We discuss the po...
journal_title:Biochemical Society transactions
pub_type: 杂志文章,评审
doi:10.1042/BST0361384
更新日期:2008-12-01 00:00:00
abstract::The giant cytoskeletal kinases of the titin-like family are emerging as key mediators of stretch-sensing in muscle. It is thought that their elastic conformational deformation during muscle function regulates both their catalysis and the recruitment of regulatory proteins to signalosomes that assemble in their vicinit...
journal_title:Biochemical Society transactions
pub_type: 杂志文章,评审
doi:10.1042/BST20130085
更新日期:2013-08-01 00:00:00
abstract::TDP-43 (TAR DNA-binding protein 43) is an hnRNP (heterogeneous nuclear ribonucleoprotein) protein whose role in cellular processes has come to the forefront of neurodegeneration research after the observation that it is the main component of brain inclusions in ALS (amyotrophic lateral sclerosis) and FTLD (frontotempo...
journal_title:Biochemical Society transactions
pub_type: 杂志文章,评审
doi:10.1042/BST20130186
更新日期:2013-12-01 00:00:00
abstract::The IRF [IFN (interferon) regulatory factor] family of transcription factors control many cellular processes, including induction of key antiviral cytokines, type I IFNs, following viral infection. Recent studies have revealed several endogenous and viral proteins involved in ubiquitin-mediated regulation of IRF activ...
journal_title:Biochemical Society transactions
pub_type: 杂志文章,评审
doi:10.1042/BST0360453
更新日期:2008-06-01 00:00:00
abstract::The availability of entire genome sequences and the wealth of literature on gene regulation have enabled researchers to model an organism's transcriptional regulation system in the form of a network. In such a network, TFs (transcription factors) and TGs (target genes) are represented as nodes and regulatory interacti...
journal_title:Biochemical Society transactions
pub_type: 杂志文章
doi:10.1042/BST0381155
更新日期:2010-10-01 00:00:00
abstract::Laccases are oxidase enzymes produced by 'white rot' fungi as part of a complex armoury of redox enzymes used to break down lignin--part of the carbon cycle of nature. Laccases alone or in combination with redox co-catalysts have been shown to oxidize xenobiotic compounds under conditions that can be described as 'gre...
journal_title:Biochemical Society transactions
pub_type: 杂志文章
doi:10.1042/BST20060304
更新日期:2006-04-01 00:00:00
abstract::Haem (Fe-protoporphyrin IX) is a cofactor found in a wide variety of proteins. It confers diverse functions, including electron transfer, the binding and sensing of gases, and many types of catalysis. The majority of cofactors are non-covalently attached to proteins. There are, however, some proteins in which the cofa...
journal_title:Biochemical Society transactions
pub_type: 杂志文章,评审
doi:10.1042/BST0330792
更新日期:2005-08-01 00:00:00
abstract::Extracellular vesicles (EVs) are a heterogeneous group of small lipid-enclosed structures with myriad roles in physiology and disease. The recent surge of interest in EVs has led to greater understanding of their biology and appreciation of how they might be utilised as diagnostic and therapeutic tools. There remain, ...
journal_title:Biochemical Society transactions
pub_type: 杂志文章,评审
doi:10.1042/BST20180112
更新日期:2018-10-19 00:00:00
abstract::A limited number of bacteria, yeast and fungi can convert hemicellulose or its monomers (xylose, arabinose, mannose and galactose) into ethanol with a satisfactory yield and productivity. In the present study we tested a number of thermophilic enrichment cultures, and new isolates of thermophilic anaerobic bacterial s...
journal_title:Biochemical Society transactions
pub_type: 杂志文章
doi:10.1042/bst0320283
更新日期:2004-04-01 00:00:00
abstract::In fluctuating environmental conditions, organisms must modulate their bioenergetic production in order to maintain cellular homeostasis for optimal fitness. Mitochondria are hubs for metabolite and energy generation. Mitochondria are also highly dynamic in their function: modulating their composition, size, density, ...
journal_title:Biochemical Society transactions
pub_type: 杂志文章
doi:10.1042/BST20200250
更新日期:2020-11-27 00:00:00
abstract::The intestinal epithelium represents one of our most important interfaces with the external environment. It must remain tightly balanced to allow nutrient absorption, but maintain barrier function and immune homoeostasis, a failure of which results in chronic infection or debilitating inflammatory bowel disease (IBD)....
journal_title:Biochemical Society transactions
pub_type: 杂志文章,评审
doi:10.1042/BST20150090
更新日期:2015-08-01 00:00:00
abstract::Peptide-bond formation is the enzymatic activity of the ribosome. The catalytic site is made up of ribosomal RNA, indicating that the ribosome is a ribozyme. This review summarizes the recent progress in understanding the mechanism of peptide bond formation. The results of biochemical and kinetic experiments, mutagene...
journal_title:Biochemical Society transactions
pub_type: 杂志文章,评审
doi:10.1042/BST0330493
更新日期:2005-06-01 00:00:00
abstract::Native disulphide bonds are essential for the structure and function of many membrane and secretory proteins. Disulphide bonds are formed, reduced and isomerized in the endoplasmic reticulum of mammalian cells by a family of oxidoreductases, which includes protein disulphide isomerase (PDI), ERp57, ERp72, P5 and PDIR....
journal_title:Biochemical Society transactions
pub_type: 杂志文章,评审
doi:10.1042/BST0320655
更新日期:2004-11-01 00:00:00
abstract::Structure-based design has gained credibility as a valuable component of the modern drug discovery process. The technique of SSNMR (solid-state NMR) promises to be a useful counterpart to the conventional experimental techniques of X-ray crystallography and solution-state NMR for providing structural features of drug ...
journal_title:Biochemical Society transactions
pub_type: 杂志文章,评审
doi:10.1042/BST0350985
更新日期:2007-11-01 00:00:00
abstract::Microvilli are found on the apical surface of epithelial cells. Recent studies on the microvillar proteins ezrin and EBP50 (ezrin/radixin/moesin-binding phosphoprotein of 50 kDa) have revealed both the dynamics and the regulation of microvillar components, and how a dynamic ezrin phosphocycle is necessary to confine m...
journal_title:Biochemical Society transactions
pub_type: 杂志文章
doi:10.1042/BST20130263
更新日期:2014-02-01 00:00:00
abstract::Non-coding transcripts play an important role in gene expression regulation in all species, including budding and fission yeast. Such regulatory transcripts include intergenic ncRNA (non-coding RNA), 5' and 3' UTRs, introns and antisense transcripts. In the present review, we discuss advantages and limitations of rece...
journal_title:Biochemical Society transactions
pub_type: 杂志文章,评审
doi:10.1042/BST20130144
更新日期:2013-12-01 00:00:00
abstract::It is generally taken as an established fact that mitochondrial respiration is associated with the generation of small amounts of ROS (reactive oxygen species). There are many arguments supporting this side activity. A major argument is the particular physico-chemical configuration of dioxygen, which prevents the tran...
journal_title:Biochemical Society transactions
pub_type: 杂志文章,评审
doi:10.1042/bst0311308
更新日期:2003-12-01 00:00:00
abstract::The adhesion of cells to the extracellular matrix is a dynamic process, mediated by a series of cell-surface and matrix-associated molecules that interact with each other in a spatially and temporally regulated manner. These interactions play a major role in tissue formation, cellular migration and the induction of ad...
journal_title:Biochemical Society transactions
pub_type: 杂志文章,评审
doi:10.1042/BST0320416
更新日期:2004-06-01 00:00:00
abstract::Other than signalling receptors sustaining leucocyte recruitment during inflammatory reactions, the chemokine system includes 'silent' receptors with distinct specificity and tissue distribution. The best-characterized molecule of this subgroup is the CC chemokine receptor D6, which binds most inflammatory CC chemokin...
journal_title:Biochemical Society transactions
pub_type: 杂志文章
doi:10.1042/BST0341014
更新日期:2006-12-01 00:00:00
abstract::Blood vessel formation during vertebrate development relies on a process called angiogenesis and is essential for organ growth and tissue viability. In addition, angiogenesis leads to pathological blood vessel growth in diseases with tissue ischaemia, such as neovascular eye disease and cancer. Neuropilin 1 (NRP1) is ...
journal_title:Biochemical Society transactions
pub_type: 杂志文章,评审
doi:10.1042/BST20140244
更新日期:2014-12-01 00:00:00
abstract::cAMP is an essential signalling molecule whose concentration in cells is regulated by a wide range of hormones. A large number of diseases, including cancer and asthma, are linked to improper regulation of the cAMP signalling system, and manipulation of cAMP levels by pharmaceutical agents has proven therapeutic benef...
journal_title:Biochemical Society transactions
pub_type: 杂志文章,评审
doi:10.1042/BST20051327
更新日期:2005-12-01 00:00:00
abstract::The EMLs are a conserved family of microtubule-associated proteins (MAPs). The founding member was discovered in sea urchins as a 77-kDa polypeptide that co-purified with microtubules. This protein, termed EMAP for echinoderm MAP, was the major non-tubulin component present in purified microtubule preparations made fr...
journal_title:Biochemical Society transactions
pub_type: 杂志文章,评审
doi:10.1042/BST20160125
更新日期:2016-10-15 00:00:00
abstract::AMP-activated protein kinase (AMPK) is a regulator of cellular metabolism in response to changes in the energy status of the cells. AMPK was known to shut down energy-consuming pathways in response to a fall in the ATP/AMP ratio by phosphorylating key enzymes of intermediate metabolism. Here we will discuss the recent...
journal_title:Biochemical Society transactions
pub_type: 杂志文章,评审
doi:10.1042/
更新日期:2002-04-01 00:00:00
abstract::The binding sites on human IgG1 for human Fc gamma receptor (Fc gamma R) I, Fc gamma RIIa, Fc gamma RIIb, Fc gamma RIIIa and neonatal FcR have been mapped. A common set of IgG1 residues is involved in binding to all Fc gamma Rs, while Fc gamma RII and Fc gamma RIII utilize distinct sites outside this common set. In ad...
journal_title:Biochemical Society transactions
pub_type: 杂志文章,评审
doi:10.1042/bst0300487
更新日期:2002-08-01 00:00:00
abstract::Polarized transport of the plant hormone auxin influences multiple growth processes in plants and is regulated by plasma-membrane-localized efflux and uptake carriers. The PGP (P-glycoprotein) ABC transporters (ATP-binding-cassette transporters), PIN (pin-formed) subfamily of major facilitator proteins and members of ...
journal_title:Biochemical Society transactions
pub_type: 杂志文章,评审
doi:10.1042/BST0350137
更新日期:2007-02-01 00:00:00