Abstract:
:Studies on those enzymes and electron-transfer proteins involved in the catabolism of 'C1' substrates in methylotrophic bacteria have provided a wealth of information concerning the transfer of electrons and hydrogen by quantum tunnelling mechanisms. With regard to H-transfer, studies with MADH have provided the first example of ground-state tunnelling of hydrogen driven by the natural, thermally activated, low-frequency motions of the enzyme molecule. Subsequent studies with related enzymes (e.g. TMADH and bacterial sarcosine oxidase) and with thermophilic alcohol dehydrogenase suggest that vibrationally assisted tunnelling of hydrogen may be more widespread than originally assumed. Our studies of electron transfer in TMADH and ETF have established a role for large-scale protein dynamics in interprotein electron transfer, and have made a contribution to the ongoing debate concerning the mechanism of amine oxidation by enzymes. Moreover, our work has identified a hitherto unknown mechanism for the control of electron density in reduced flavin that influences the rate of electron transfer between redox centres within a protein molecule. Despite this progress, however, many questions still remain to be resolved. With the development of more sophisticated experimental techniques (and also continued financial support from the funding agencies!), the mechanistic uncertainties surrounding the quantum mechanical transfer of electrons and hydrogen in biological molecules should be transmogrified into the certainties one more readily acquaints with the classical world.
journal_name
Biochem Soc Transjournal_title
Biochemical Society transactionsauthors
Scrutton NSdoi
10.1042/bst0270767keywords:
subject
Has Abstractpub_date
1999-12-01 00:00:00pages
767-79issue
6eissn
0300-5127issn
1470-8752journal_volume
27pub_type
杂志文章,评审abstract::The spliceosome is a macromolecular machine that carries out the excision of introns from eukaryotic pre-mRNAs and splicing together of exons. Four large RNA-protein complexes, called the U1, U2, U4/U6 and U5 small nuclear ribonucleoprotein particles (snRNPs), and some non-snRNP proteins assemble around three short co...
journal_title:Biochemical Society transactions
pub_type:
doi:10.1042/0300-5127:0290015
更新日期:2001-05-01 00:00:00
abstract::Uncoupling protein 2 (UCP2) mRNA is expressed in a panoply of tissues, including the brain, where it is widely distributed. In the mouse brain, it is expressed in the hypothalamus (suprachiasmatic, paraventricular, dorsomedial, ventromedial and arcuate nuclei), the thalamus (submedius nucleus) and the brain-stem (dors...
journal_title:Biochemical Society transactions
pub_type: 杂志文章,评审
doi:10.1042/0300-5127:0290812
更新日期:2001-11-01 00:00:00
abstract::Polycomb group (PcG) proteins are highly conserved chromatin-modifying complexes that implement gene silencing in higher eukaryotes. Thousands of genes and multiple developmental processes are regulated by PcG proteins. As the first chromatin modifier been identified in model plant Arabidopsis thaliana, the methyltran...
journal_title:Biochemical Society transactions
pub_type: 杂志文章
doi:10.1042/BST20200192
更新日期:2020-08-28 00:00:00
abstract::The CPC (chromosomal passenger complex) performs essential roles in the regulation and co-ordination of chromosomal and cytoskeletal events during mitosis and meiosis. The first functional analyses showed evidence of a role of the CPC in the regulation of cytokinesis. In this review, I summarize what we have learned s...
journal_title:Biochemical Society transactions
pub_type: 杂志文章,评审
doi:10.1042/BST0360367
更新日期:2008-06-01 00:00:00
abstract::SOEs (sulfite-oxidizing enzymes) are physiologically vital and occur in all forms of life. During the catalytic cycle, the five-co-ordinate square pyramidal oxo-molybdenum active site passes through the Mo(V) state, and intimate details of the structure can be obtained from variable frequency pulsed EPR spectroscopy t...
journal_title:Biochemical Society transactions
pub_type: 杂志文章
doi:10.1042/BST0361129
更新日期:2008-12-01 00:00:00
abstract::The discovery that nuclear factor erythroid 2-related factor 2 (Nrf2) undergoes translocational oscillations from cytoplasm to nucleus in human cells with frequency modulation linked to activation of a stress-stimulated cytoprotective response raises the prospect that the Nrf2 works mechanistically analogous to a wire...
journal_title:Biochemical Society transactions
pub_type: 杂志文章
doi:10.1042/BST20150060
更新日期:2015-08-01 00:00:00
abstract::Muscles are responsible for generating the forces required for the movement of multicellular organisms. Microscopically, these forces arise as a consequence of motor proteins (myosin) pulling and sliding along actin filaments. Current knowledge states that the molecular forces between actin and myosin are linear in na...
journal_title:Biochemical Society transactions
pub_type: 杂志文章,评审
doi:10.1042/BST0320694
更新日期:2004-11-01 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::Solid-state nuclear magnetic resonance (ssNMR) is an indispensable tool for elucidating the structure and dynamics of insoluble and non-crystalline biomolecules. The recent advances in the sensitivity-enhancing technique magic-angle spinning dynamic nuclear polarization (MAS-DNP) have substantially expanded the territ...
journal_title:Biochemical Society transactions
pub_type: 杂志文章
doi:10.1042/BST20191084
更新日期:2020-06-30 00:00:00
abstract::High glucose inhibits mitochondrial respiration, known as the 'Crabtree effect', in cancer cells and possibly other cell types. The upstream pathways regulating this phenomenon are poorly understood. In diabetes, where glucose levels are elevated, the p90(RSK) (p90 ribosomal S6 kinase) has received much attention as a...
journal_title:Biochemical Society transactions
pub_type: 杂志文章
doi:10.1042/BST20120277
更新日期:2013-02-01 00:00:00
abstract::The study of regulated exocytosis uniquely allows the direct measurement of intracellular membrane fusion events in real time. We have exploited this to examine factors that regulate not only the extent but also the dynamics of single fusion/release events. The general strategy used has been to assess exocytosis in tr...
journal_title:Biochemical Society transactions
pub_type: 杂志文章,评审
doi:10.1042/bst0290467
更新日期:2001-08-01 00:00:00
abstract::In T cell development, a pivotal decision-making stage, termed β-selection, integrates a TCRβ checkpoint to coordinate survival, proliferation and differentiation to an αβ T cell. Here, we review how transcriptional regulation coordinates fate determination in early T cell development to enable β-selection. Errors in ...
journal_title:Biochemical Society transactions
pub_type: 杂志文章,评审
doi:10.1042/BST20180414
更新日期:2019-08-30 00:00:00
abstract::Most of the effects of the signalling molecule nitric oxide (NO) are mediated by the stimulation of the NO-sensitive GC (guanylate cyclase) and the subsequent increase in cGMP formation. The enzyme contains a prosthetic haem group, which mediates NO stimulation. In addition to the physiological activator NO, NO-sensit...
journal_title:Biochemical Society transactions
pub_type: 杂志文章
doi:10.1042/BST20051119
更新日期:2005-11-01 00:00:00
abstract::PGs (prostaglandins) are synthesized through the cyclo-oxygenase (COX-1 and -2) pathway in a variety of cells in response to various physiological stimuli. All cells require at least one pathway for apoptosis, and mitochondrial play a central role in regulation of apoptosis. In a previous study, incubation of A549 cel...
journal_title:Biochemical Society transactions
pub_type: 杂志文章
doi:10.1042/BST0321078
更新日期:2004-12-01 00:00:00
abstract::A range of mitochondria-targeted probe molecules that comprise a lipophilic cation covalently attached to an active moiety have been developed. The lipophilic cation causes the accumulation of these molecules into mitochondria, driven by the mitochondrial membrane potential. To date, we have targeted antioxidants, spi...
journal_title:Biochemical Society transactions
pub_type: 杂志文章
doi:10.1042/BST0321011
更新日期:2004-12-01 00:00:00
abstract::Collaborative communication lies at the centre of multicellular life. Gap junctions (GJs) are surface membrane structures that allow direct communication between cells. They were discovered in the 1960s following the convergence of the detection of low-resistance electrical interactions between cells and anatomical st...
journal_title:Biochemical Society transactions
pub_type: 杂志文章,评审
doi:10.1042/BST20150056
更新日期:2015-06-01 00:00:00
abstract::LRRK2 mutation is the most common inherited, autosomal dominant cause of Parkinson's disease (PD) and has also been observed in sporadic cases. Most mutations result in increased LRRK2 kinase activity. LRRK2 is highly expressed in brain regions that receive dense, convergent innervation by dopaminergic and glutamaterg...
journal_title:Biochemical Society transactions
pub_type: 杂志文章,评审
doi:10.1042/BST20180468
更新日期:2018-12-17 00:00:00
abstract::In the present article, I discuss recent developments in the naming of the TOR (target of rapamycin) protein. In particular, I address the issue of mammalian target of rapamycin (mTOR) versus the newer mechanistic target of rapamycin (MTOR). mTOR is the name given by the TOR community almost two decades ago and widely...
journal_title:Biochemical Society transactions
pub_type: 杂志文章
doi:10.1042/BST20130092
更新日期:2013-08-01 00:00:00
abstract::Glycosaminoglycans (GAGs), present in the extracellular matrix, are exploited by numerous, distinct microbes for cellular attachment, adhesion, invasion and evasion of the host immune system. Glycosaminoglycans, including the widely used, clinical anticoagulant heparin and semi-synthetic analogues thereof, have been r...
journal_title:Biochemical Society transactions
pub_type: 杂志文章,评审
doi:10.1042/BST20170404
更新日期:2018-08-20 00:00:00
abstract::The glutamate/aspartate transporter GLAST-1 is expressed in bone in vivo and also exists as a splice variant (GLAST-1a) in which exon 3 is excluded. Since GLAST-1 expression is regulated in bone in response to osteogenic mechanical stimuli in vivo and binding of glutamate to receptors on osteoblasts increases osteobla...
journal_title:Biochemical Society transactions
pub_type: 杂志文章
doi:10.1042/bst0300890
更新日期:2002-11-01 00:00:00
abstract::CD4+ effector T cells effectuate T cell immune responses, producing cytokines to orchestrate the nature and type of immune responses. The non-receptor tyrosine kinase IL-2 inducible T cell kinase (ITK), a mediator of T cell Receptor signaling, plays a critical role in tuning the development of these effector cells. In...
journal_title:Biochemical Society transactions
pub_type: 杂志文章,评审
doi:10.1042/BST20190486
更新日期:2020-02-28 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::A comparative approach has been used to study the role of several lipid-body-binding proteins in plants and animals. Caleosins are a newly discovered class of calcium-binding lipid-body proteins found in plants and fungi, which we now report to have separate endoplasmic reticulum- and lipid-body-associated isoforms. W...
journal_title:Biochemical Society transactions
pub_type: 杂志文章
doi:
更新日期:2000-12-01 00:00:00
abstract::Macrophage apoptosis occurs within the granuloma, which is essential for successful immunity to tuberculosis. In vitro macrophage apoptosis is associated with the killing of intracellular Mycobacterium tuberculosis. A greater understanding of these observations will lead to new immunotherapies and improved vaccine des...
journal_title:Biochemical Society transactions
pub_type: 杂志文章,评审
doi:10.1042/BST0320496
更新日期:2004-06-01 00:00:00
abstract::Along with the development of several large-scale methods such as mass spectrometry or micro arrays, genome wide models became not only a possibility but an obvious tool for theoretical biologists to integrate and analyse complex biological data. Nevertheless, incorporating the dynamics of photosynthesis remains one o...
journal_title:Biochemical Society transactions
pub_type: 杂志文章,评审
doi:10.1042/BST20150136
更新日期:2015-12-01 00:00:00
abstract::HDX-MS has emerged as a powerful tool to interrogate the structure and dynamics of proteins and their complexes. Recent advances in the methodology and instrumentation have enabled the application of HDX-MS to membrane proteins. Such targets are challenging to investigate with conventional strategies. Developing new t...
journal_title:Biochemical Society transactions
pub_type: 杂志文章
doi:10.1042/BST20190880
更新日期:2020-06-29 00:00:00
abstract::The inositol-depletion hypothesis was suggested to explain the therapeutic mechanism of mood-stabilizing drugs. Focus was previously on the phosphatidylinositol signalling pathway and on the regulatory roles of Ins(3,4,5)P(3) and DAG (diacylglycerol). Recent findings indicate that inositol and inositol-containing mole...
journal_title:Biochemical Society transactions
pub_type: 杂志文章,评审
doi:10.1042/BST0371099
更新日期:2009-10-01 00:00:00
abstract::The statins, simvastatin and atorvastatin are the most widely prescribed drugs. Statins lower cholesterol levels through their action on HMG-CoA (3-hydroxy-3-methylglutaryl-CoA) reductase, an essential enzyme for the biosynthesis of cholesterol. Fungal HMG-CoA reductases are also inhibited by statins, resulting in red...
journal_title:Biochemical Society transactions
pub_type: 杂志文章,评审
doi:10.1042/BST0351529
更新日期:2007-12-01 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::Sensing and signalling events that detect abiotic stress-induced changes in plant water status and initiate downstream stress responses such as ABA (abscisic acid) accumulation and osmoregulation remain uncharacterized in plants. Although conclusive results are lacking, recent results from plants, and analogies to sig...
journal_title:Biochemical Society transactions
pub_type: 杂志文章,评审
doi:10.1042/BST0330375
更新日期:2005-04-01 00:00:00