Abstract：
:DNA methyltransferases (MTases) uniquely combine the ability to recognize and covalently modify specific target sequences in DNA using the ubiquitous cofactor S-adenosyl-L-methionine (AdoMet). Although DNA methylation plays important roles in biological signaling, the transferred methyl group is a poor reporter and is highly inert to further biocompatible derivatization. To unlock the biotechnological power of these enzymes, two major types of cofactor AdoMet analogs were developed that permit targeted MTase-directed attachment of larger moieties containing functional or reporter groups onto DNA. One such approach (named sequence-specific methyltransferase-induced labeling, SMILing) uses reactive aziridine or N-mustard mimics of the cofactor AdoMet, which render targeted coupling of a whole cofactor molecule to the target DNA. The second approach (methyltransferase-directed transfer of activated groups, mTAG) uses AdoMet analogs with a sulfonium-bound extended side chain replacing the methyl group, which permits MTase-directed covalent transfer of the activated side chain alone. As the enlarged cofactors are not always compatible with the active sites of native MTases, steric engineering of the active site has been employed to optimize their alkyltransferase activity. In addition to the described cofactor analogs, recently discovered atypical reactions of DNA cytosine-5 MTases involving non-cofactor-like compounds can also be exploited for targeted derivatization and labeling of DNA. Altogether, these approaches offer new powerful tools for sequence-specific covalent DNA labeling, which not only pave the way to developing a variety of useful techniques in DNA research, diagnostics, and nanotechnologies but have already proven practical utility for optical DNA mapping and epigenome studies.
journal_name
Adv Exp Med Bioljournal_title
Advances in experimental medicine and biologyauthors
Tomkuvienė M,Kriukienė E,Klimašauskas Sdoi
10.1007/978-3-319-43624-1_19subject
Has Abstractpub_date
2016-01-01 00:00:00pages
511-535eissn
0065-2598issn
2214-8019journal_volume
945pub_type
杂志文章,评审abstract：:Oxytocin (OT) is released from the neurohypophysis into the jugular vein of sheep in small 1-2 min pulses (ca. 10 pg/ml) in both cyclic and ovariectomized sheep. In intact cycling sheep, additional hour long bursts of OT (up to 200 pg/ml) occur in peripheral blood during luteolysis at intervals of 6 to 9 hrs which app...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章
doi：
更新日期：1995-01-01 00:00:00
abstract：:Smoking is a harmful habit, causing a range of severe consequences which could lead to premature death. This habit is still prevalent amongst young people. In order to protect children, effective early interventions supported by public instances need to be set in place. Raising awareness and educating the youth is cru...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章
doi：10.1007/978-3-030-43961-3_4
更新日期：2020-01-01 00:00:00
abstract：:It is well established that palmitoylation plays a key role in the regulation of immune checkpoints, but the technical challenges in detecting protein palmitoylation have significantly prohibited further researches in this field. Till now, different approaches have been proposed, such as mutagenesis, antibody-based me...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：10.1007/978-981-15-3266-5_17
更新日期：2020-01-01 00:00:00
abstract：:Oxygenation of a tumor is one of the most important predictive factors: hypoxia is associated with aggressive tumors and substantially lower survival rate. Despite this high relevance of tumor oxygenation, there is currently no bedside technique available to measure it in clinical routine care. The aim of this work is...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章
doi：10.1007/978-3-319-91287-5_26
更新日期：2018-01-01 00:00:00
abstract：:The generic tendency of proteins to misassemble into nonfunctional, and sometimes cytotoxic, structures poses a universal problem for all types of cell. This problem is exacerbated by the high total concentration of macromolecules found within most intracellular compartments but it is solved by the actions of molecula...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：10.1007/978-0-387-39975-1_1
更新日期：2007-01-01 00:00:00
abstract：:Macromolecules have been prepared containing native insulin carried by a modified insulin skeleton made by partially thiolating the insulin hexamer and forming intermolecular cross-links through disulphide bridges. Oxidation of partially thiolated insulin (0.5-0.7 SH group/mole), formed by reacting insulin with AHTL, ...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章
doi：10.1007/978-1-4684-3282-4_15
更新日期：1977-01-01 00:00:00
abstract：:Intact and viable parenchymal and non-parenchymal liver cell preparations were isolated by enzyme perfusion techniques from young and old rats. The distribution of the lysosomal enzymes acid phosphatase, beta-galactosidase, cathepsin D, acid DNAse, and arylsulphatase B over parenchymal and non-parenchymal cells was de...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章
doi：10.1007/978-1-4757-0731-1_12
更新日期：1975-01-01 00:00:00
abstract：:Hypertension increases the risks of end-organ injury, maternal/fetal vulnerability, and total mortality. Throughout the world, it kills about 7.5 million people every year. During 1975-2015, the number of adults with hypertension increased from 594 million to more than 1.1 billion, mostly due to the increase in the lo...
journal_title：Advances in experimental medicine and biology
pub_type：
doi：10.1007/5584_2017_30
更新日期：2017-01-01 00:00:00
abstract：:We previously reported that in potato chip and French fry models, the formation of acrylamide can be reduced by controlling pH during processing steps, either by organic (acidulants) or inorganic acids. Use of phytate, a naturally occurring chelator, with or without Ca++ (or divalent ions), can reduce acrylamide forma...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章
doi：10.1007/0-387-24980-X_26
更新日期：2005-01-01 00:00:00
abstract：:The prognosis of patients with pulmonary arterial hypertension (PAH) is poor. Available therapies (Ca(++)-channel blockers, epoprostenol, bosentan) have limited efficacy or are expensive and associated with significant complications. PAH is characterized by vasoconstriction, thrombosis in-situ and vascular remodeling....
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：10.1007/978-1-4419-8997-0_21
更新日期：2003-01-01 00:00:00
abstract：:Type 1 diabetes mellitus (T1DM) is classified as an autoimmune disease which progressively results in the depletion of insulin-secreting β-cells. Consequently, the insulin secretion stops leading to hyperglycemic situations within the body. Under severe conditions, it also causes multi-organ diabetes-associated dysfun...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章
doi：10.1007/5584_2018_195
更新日期：2019-01-01 00:00:00
abstract：:The term "autophagy", which means "self (auto) - eating (phagy)", describes a catabolic process that is evolutionarially conserved among all eukaryotes. Although autophagy is mainly accepted as a cell survival mechanism, it also modulates the process known as "type II cell death". AKT/mTOR pathway is an upstream activ...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：10.1007/978-3-030-20301-6_5
更新日期：2019-01-01 00:00:00
abstract：:1) An extract of D. carrota induces agglutination of most serotypes of S. mutans but not of S. salivarius or S. mitis. 2) If added to a suspension of mixed bacteria, a piece of D. carrota may selectively sorb S. mutans while S. salivarius and S. mitis only are affected to a minor degree. 3) A saliva coat on the bacter...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章
doi：10.1007/978-1-4684-3369-2_37
更新日期：1978-01-01 00:00:00
abstract：:The accumulation of tau filaments in neurons is a pathological hallmark of various neurodegenerative diseases, including Alzheimer's disease. However, it is not the filamentous aggregates themselves, but non-filamentous tau species, tau oligomer, that is thought to be the culprit in tau-mediated neurodegeneration. The...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：10.1007/978-981-32-9358-8_27
更新日期：2019-01-01 00:00:00
abstract：:Chemokines are a family of small structurally related molecules that were recognized originally for their ability to regulate cell trafficking in inflammation. We have found that a chemokine, CXC chemokine ligand 12/stromal cell-derived factor/pre-B-cell growth stimulating factor (CXCL12/ SDF-1/PBSF) and its physiolog...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章
doi：10.1007/978-0-387-72009-8_9
更新日期：2007-01-01 00:00:00
abstract：:The cytoskeleton consists of filamentous protein polymers that form organized structures, contributing to a multitude of cell life aspects. It includes three types of polymers: the actin microfilaments, the microtubules and the intermediate filaments. Decades of research have implicated the cytoskeleton in processes t...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：10.1007/978-3-030-25650-0_12
更新日期：2019-01-01 00:00:00
abstract：:The chromatin of male germ cells is restructured throughout spermatogenesis. Analysis of differential histone protein patterns at specific stages of spermatogenesis may contribute towards an understanding of the changes in chromatin structure and function during this differentiation process. The most striking changes ...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：10.1007/978-1-4615-5913-9_4
更新日期：1997-01-01 00:00:00
abstract：:RNA virus quasispecies are subjected to processes of positive Darwinian selection, to a very active and continuous negative selection and to random genetic drift. The course of RNA virus evolution is often unpredictable, and recent results suggest that even highly conserved motifs, once regarded as essential for infec...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：10.1007/978-1-4615-5331-1_93
更新日期：1998-01-01 00:00:00
abstract：:Heparan sulphate (HS) is a linear glycosaminoglycan found ubiquitously on the surface and in the pericellular matrix of metazoan cells that is covalently attached to core proteins to form HS proteoglycans. HS interacts specifically with a large number (> 100) of extracellular regulatory proteins, many of which are key...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：10.1007/0-306-46832-8_7
更新日期：2000-01-01 00:00:00
abstract：:Although mitochondrial dysfunction, endoplasmic reticulum (ER) stress, and disrupted lipid and calcium (Ca2+) homeostasis are classically associated with both insulin resistance and β-cell dysfunction in type 2 diabetes mellitus (T2DM), the interplay between these metabolic stresses is less known. Both organelles inte...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：10.1007/978-981-10-4567-7_13
更新日期：2017-01-01 00:00:00
abstract：:The tumor microenvironment is composed of cancer cells, noncancer cells (e.g., immune cells, stromal cells, endothelial cells, and adipocytes), and various mediators (e.g., cytokines, chemokines, growth factors, and humoral factors) that work together to support cancer growth, progression, and resistance to therapies....
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：10.1007/978-3-030-35727-6_7
更新日期：2020-01-01 00:00:00
abstract：:Enteropathogenic Escherichia coli (EPEC) produce attaching and effacing lesions. The genes responsible for this lesion are clustered on the chromosome forming a 35.5 kilobase pathogenesis island called LEE. The LEE was identified, characterized and completely sequenced from the human EPEC strain E2348/69. The LEE carr...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章
doi：10.1007/978-1-4615-4143-1_11
更新日期：1999-01-01 00:00:00
abstract：:Curcumin, a major active component of turmeric, is extracted from the powdered dry rhizome of Curcuma longa Linn (Zingiberaceae) and it has been used for centuries in indigenous medicine. We have shown that curcumin has a protective role against myocardial necrosis in rats. The antioxidant activity of curcumin could b...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：10.1007/978-0-387-46401-5_16
更新日期：2007-01-01 00:00:00
abstract：UNLABELLED:Premature infants require large amounts of protein and energy to achieve normal growth. Feeding with human milk alone is therefore only regarded acceptable if the protein and energy content is adequate. METHODS:476 milk samples from 101 mothers delivering before the 32nd gestational week (mean gestational a...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章
doi：10.1007/978-1-4615-1371-1_51
更新日期：2001-01-01 00:00:00
abstract：:As porcine corpus luteum tissue ages there is an increase in amount of LH/hCG vinding inhibitor. This inhibitor is absent in non-luteal ovarian tissue, heart and lung. ...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章
doi：10.1007/978-1-4684-3474-3_80
更新日期：1979-01-01 00:00:00
abstract：:Although prevalence estimates are imprecise, growing numbers of women in the United States are living longer with metastatic breast cancer, attributable at least in part to the availability of effective targeted therapies. Women living with metastatic disease are understudied, however, and substantial heterogeneity ex...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章
doi：10.1007/978-3-319-16366-6_16
更新日期：2015-01-01 00:00:00
abstract：:A new approach to measure muscle oxygen saturation (SmO(2)) using near infrared spectroscopy (NIRS) has been proposed in this paper. This approach exploits the cyclic NIRS signals seen during exercise which are often regarded as "movement artefacts". This new measure, which we term the "cyclic SmO(2)", has the potenti...
journal_title：Advances in experimental medicine and biology
pub_type： 临床试验,杂志文章
doi：10.1007/978-1-4419-1241-1_26
更新日期：2010-01-01 00:00:00
abstract：:Binding of mammalian sperm to the zona pellucida and the induction of the acrosome reaction are prerequisites for successful oocyte fertilization. In the mouse model, the zona pellucida consists of three sulfated glycoproteins, ZP1, ZP2, and ZP3. Zona pellucida proteins are secreted to form a filamentous zona matrix i...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章
doi：
更新日期：1997-01-01 00:00:00
abstract：:Retinoblastoma (Rb) is a malignant tumor that originates from developing retina. Diagnosis based on clinical signs and symptoms and is usually made in children under the age of five years. Mutations in both alleles of the RB1 gene are a prerequisite for this tumor to develop. In most patients with sporadic unilateral ...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：10.1007/978-1-4419-6448-9_21
更新日期：2010-01-01 00:00:00
abstract：:Long-term studies of anti-pathogen and anti-tumor immunity have provided complementary genetic and pharmacological evidence for the immunosuppressive and immunomodulatory effects of Hypoxia-HIF-1α and adenosine-mediated suppression via the A2A adenosine receptor signaling pathway (Hypoxia-A2A-adenosinergic). This path...
journal_title：Advances in experimental medicine and biology
pub_type： 杂志文章,评审
doi：10.1007/978-3-030-12734-3_8
更新日期：2019-01-01 00:00:00
