abstract：:Helical filaments were the first structures to be reconstructed in three dimensions from electron microscopic images, and continue to be extensively studied due to the large number of such helical polymers found in biology. In principle, a single image of a helical polymer provides all of the different projections nee...

journal_title：Current opinion in structural biology

authors： Egelman EH

更新日期：2007-10-01 00:00:00

abstract：:Phage display is the longest-standing platform among molecular display technologies. Recent developments have extended its utility to proteins that were previously recalcitrant to phage display. The technique has played a dominant role in forming the field of synthetic binding protein engineering, where novel interfac...

journal_title：Current opinion in structural biology

authors： Sidhu SS,Koide S

更新日期：2007-08-01 00:00:00

abstract：:The protein folding problem can be viewed as three different problems: defining the thermodynamic folding code; devising a good computational structure prediction algorithm; and answering Levinthal's question regarding the kinetic mechanism of how proteins can fold so quickly. Once regarded as a grand challenge, prote...

journal_title：Current opinion in structural biology

authors： Dill KA,Ozkan SB,Weikl TR,Chodera JD,Voelz VA

更新日期：2007-06-01 00:00:00

abstract：:RNA helicases are a large group of enzymes that function in virtually all aspects of RNA metabolism. Although RNA helicases share a highly conserved structure, different enzymes display a wide array of biochemical activities, including RNA duplex unwinding, protein displacement from RNA and strand annealing. Recent st...

journal_title：Current opinion in structural biology

authors： Jankowsky E,Fairman ME

更新日期：2007-06-01 00:00:00

abstract：:Viruses with an icosahedrally symmetric protein capsid and a membrane infect hosts from all three domains of life. Similar architectural principles are shared by different viral families, as exemplified by double-stranded DNA viruses such as PRD1 and STIV. During virus assembly, the membrane lipids are selectively acq...

journal_title：Current opinion in structural biology

authors： Huiskonen JT,Butcher SJ

更新日期：2007-04-01 00:00:00

abstract：:Although intermediates have long been recognised as fascinating species that form during the folding of large proteins, the role that intermediates play in the folding of small, single-domain proteins has been widely debated. Recent discoveries using new, sensitive methods of detection and studies combining simulation...

journal_title：Current opinion in structural biology

authors： Brockwell DJ,Radford SE

更新日期：2007-02-01 00:00:00

abstract：:Since user-friendly atomic force microscopes came onto the market a few years ago, scientists have explored the response of many proteins to applied force. This field has now matured beyond the phenomenological with exciting recent developments, particularly with regards to research into biological questions. For exam...

journal_title：Current opinion in structural biology

authors： Forman JR,Clarke J

更新日期：2007-02-01 00:00:00

abstract：:Protein-protein interactions involving the catalytic domain of protein kinases are likely to be generally important in the regulation of signal transduction pathways, but are rather sparsely represented in crystal structures. Recently determined structures of the kinase domains of the mitogen-activated protein kinase ...

journal_title：Current opinion in structural biology

authors： Pellicena P,Kuriyan J

更新日期：2006-12-01 00:00:00

abstract：:As a result of the recent enormous technological progress, experimental structure determination has become an integral part of the development of drugs against disease-related target proteins. The post-translational modification of proteins is an important regulatory process in living organisms; one such example is ly...

journal_title：Current opinion in structural biology

authors： Mittl PR,Grütter MG

更新日期：2006-12-01 00:00:00

abstract：:During the past few years, there have been exciting developments in the field of flavoenzymology. New flavoenzymes have been discovered that are implicated in a variety of biological processes, including cell signaling, chromatin remodeling and cell development. The structures of several of these new flavoenzymes have...

journal_title：Current opinion in structural biology

authors： De Colibus L,Mattevi A

更新日期：2006-12-01 00:00:00

abstract：:X-ray radiation damage to cryocooled ( approximately 100 K) macromolecular crystals has emerged as a general problem, especially since the advent of third generation synchrotron undulator sources. Interest in understanding the physical and chemical phenomena behind the observed effects is growing rapidly. The specific...

journal_title：Current opinion in structural biology

authors： Ravelli RB,Garman EF

更新日期：2006-10-01 00:00:00

abstract：:Solid-state NMR (ssNMR) offers insight into the formation of protein complexes and ligand binding for a large range of molecular sizes and binding affinities. Recent instrumental and methodological progress has enabled novel possibilities for using multi-dimensional ssNMR to study molecular 3D structures and interacti...

journal_title：Current opinion in structural biology

authors： Baldus M

更新日期：2006-10-01 00:00:00

abstract：:The small multidrug resistance proteins constitute a family of bacterial antiporters that confer multidrug resistance by H(+)-linked drug efflux across the bacterial cytoplasmic membrane. The structure of EmrE, the family archetype, has been determined by electron crystallography and shows that EmrE in the membrane is...

journal_title：Current opinion in structural biology

authors： Tate CG

更新日期：2006-08-01 00:00:00

abstract：:The ClC proteins are members of a large family of chloride transport proteins, which are involved in a variety of physiological processes. All family members share a conserved molecular architecture consisting of a complex transmembrane transport domain and a soluble regulatory domain. To date, representative structur...

journal_title：Current opinion in structural biology

authors： Dutzler R

更新日期：2006-08-01 00:00:00

abstract：:Multivalent molecules with a precise array of recognition elements that interact with specific cell types are important for characterizing the topology of molecules on a cell surface. Applications ranging from the control of cellular signaling to drug delivery and tissue imaging rely on these surface-mapping molecules...

journal_title：Current opinion in structural biology

authors： Lee Y,Sampson NS

更新日期：2006-08-01 00:00:00

abstract：:Progress in structural biology has begun to reveal the precise architecture of integral membrane proteins. However, the manner in which these complex structures are achieved remains unclear. Recent developments are starting to shed light on the unfolding and folding of a small but growing number of membrane proteins. ...

journal_title：Current opinion in structural biology

authors： Booth PJ,Curnow P

更新日期：2006-08-01 00:00:00

abstract：:Ribonuclease P (RNase P) is one of only two known universal ribozymes and was one of the first ribozymes to be discovered. It is involved in RNA processing, in particular the 5' maturation of tRNA. Unlike most other natural ribozymes, it recognizes and cleaves its substrate in trans. RNase P is a ribonucleoprotein com...

journal_title：Current opinion in structural biology

authors： Torres-Larios A,Swinger KK,Pan T,Mondragón A

更新日期：2006-06-01 00:00:00

abstract：:Messenger RNAs often contain structures in their 5'-untranslated region that serve to regulate or promote expression of their gene product. Recent structural studies have revealed that riboswitches, which bind a variety of small molecule metabolites, including purine bases, S-adenosylmethionine, amino acids and cofact...

journal_title：Current opinion in structural biology

authors： Batey RT

更新日期：2006-06-01 00:00:00

abstract：:Maintenance of telomeres by the enzyme telomerase is essential for genomic stability and cell viability in ciliates, vertebrates and yeast. The minimal components of telomerase required for catalytic activity are the telomerase reverse transcriptase (TERT) protein and the template-containing telomerase RNA (TER). Rece...

journal_title：Current opinion in structural biology

authors： Theimer CA,Feigon J

更新日期：2006-06-01 00:00:00

abstract：:Electrostatics plays a major role in the stabilization and function of biomolecules; as such, it remains a major focus of theoretical and computational studies of macromolecules. Electrostatic interactions are long range, and strongly dependent on the solvent and ions surrounding the biomolecule under study. During th...

journal_title：Current opinion in structural biology

authors： Koehl P

更新日期：2006-04-01 00:00:00

abstract：:A remarkable group of proteins challenge the notions that protein sequence determines a unique three-dimensional structure, and that membrane and soluble proteins are very distinct. The pore-forming toxins typically transform from soluble, monomeric proteins to oligomers that form transmembrane channels. Recent struct...

journal_title：Current opinion in structural biology

authors： Tilley SJ,Saibil HR

更新日期：2006-04-01 00:00:00

abstract：:G-protein-coupled receptors (GPCRs) participate in virtually all physiological processes. They constitute the largest and most structurally conserved family of signaling molecules. Several class C GPCRs have been shown to exist as dimers in their active form and growing evidence indicates that many, if not all, class ...

journal_title：Current opinion in structural biology

authors： Fotiadis D,Jastrzebska B,Philippsen A,Müller DJ,Palczewski K,Engel A

更新日期：2006-04-01 00:00:00

abstract：:Structure-specific DNA nucleases play important roles in various DNA transactions such as DNA replication, repair and recombination. These enzymes recognize loops and branched DNA structures. Recent structural studies have provided detailed insights into the functions of these enzymes. Structures of Holliday junction ...

journal_title：Current opinion in structural biology

authors： Nishino T,Ishino Y,Morikawa K

更新日期：2006-02-01 00:00:00

abstract：:DNA photolyases are extremely efficient light-driven DNA repair enzymes that use the energy of a blue-light photon to 'inject' an electron onto UV-damaged DNA, catalyzing the splitting of mutagenic pyrimidine dimers. By contrast, cryptochromes use blue light to trigger signaling cascades in multicellular organisms, fu...

journal_title：Current opinion in structural biology

authors： Essen LO

更新日期：2006-02-01 00:00:00

abstract：:CCA-adding enzymes (tRNA nucleotidyltransferases) are responsible for the maturation or repair of the functional 3' end of tRNAs. These enzymes are remarkable because they polymerize the essential nucleotides CCA onto the 3' terminus of tRNA precursors without using a nucleic acid template. Recent crystal structures, ...

journal_title：Current opinion in structural biology

authors： Xiong Y,Steitz TA

更新日期：2006-02-01 00:00:00

abstract：:Aromatic polyketides are secondary metabolites that afford some of the most common antibiotics and anti-cancer drugs currently in clinical use. Not least because of their medical importance, the biosynthesis of these compounds has attracted considerable interest during the past few years; important advances have been ...

journal_title：Current opinion in structural biology

authors： Schneider G

更新日期：2005-12-01 00:00:00

abstract：:Recently, advances have been made in methods and applications that integrate electron microscopy density maps and comparative modeling to produce atomic structures of macromolecular assemblies. Electron microscopy can benefit from comparative modeling through the fitting of comparative models into electron microscopy ...

journal_title：Current opinion in structural biology

authors： Topf M,Sali A

更新日期：2005-10-01 00:00:00

abstract：:Congenital disorders of glycosylation (CDG) are a group of diseases that affect glycoprotein biogenesis. Eighteen different types of CDG have been defined genetically. They result from deficiencies in either the biosynthesis of oligosaccharide precursors or specific steps of N-glycan assembly, resulting in the absence...

journal_title：Current opinion in structural biology

authors： Freeze HH,Aebi M

更新日期：2005-10-01 00:00:00

abstract：:Heparan sulfate (HS) is an essential and dynamic regulator of fibroblast growth factor (FGF) signaling. Two fundamentally different crystallographic models have been proposed to explain, at the molecular level, how HS/heparin enables FGF and FGF receptor (FGFR) to assemble into a functional dimer on the cell surface. ...

journal_title：Current opinion in structural biology

authors： Mohammadi M,Olsen SK,Goetz R

更新日期：2005-10-01 00:00:00

abstract：:The structure of the visual pigment rhodopsin in the dark state was first investigated by electron microscopy (EM). More recently, rhodopsin has been crystallised in two different space groups--a tetragonal P4(1) crystal form and a trigonal P3(1) packing arrangement. The structures of the pigment, determined by X-ray ...

journal_title：Current opinion in structural biology

authors： Schertler GF

更新日期：2005-08-01 00:00:00

abstract：:The annotation of protein function at genomic scale is essential for day-to-day work in biology and for any systematic approach to the modeling of biological systems. Currently, functional annotation is essentially based on the expansion of the relatively small number of experimentally determined functions to large co...

journal_title：Current opinion in structural biology

authors： Valencia A

更新日期：2005-06-01 00:00:00

abstract：:When a protein's function cannot be experimentally determined, it can often be inferred from sequence similarity. Should this process fail, analysis of the protein structure can provide functional clues or confirm tentative functional assignments inferred from the sequence. Many structure-based approaches exist (e.g. ...

journal_title：Current opinion in structural biology

authors： Watson JD,Laskowski RA,Thornton JM

更新日期：2005-06-01 00:00:00

abstract：:Recent developments in implicit solvent models may be compared in terms of accuracy and computational efficiency. Based on improvements in the accuracy of generalized Born methods and the speed of Poisson-Boltzmann solvers, it appears that the two techniques are converging to a point at which both will be suitable for...

journal_title：Current opinion in structural biology

authors： Baker NA

更新日期：2005-04-01 00:00:00

abstract：:Newly synthesized proteins leave the ribosome through a narrow tunnel in the large subunit. During ongoing synthesis, nascent protein chains are particularly sensitive to aggregation and degradation because they emerge from the ribosome in an unfolded state. In bacteria, the first protein to interact with nascent chai...

journal_title：Current opinion in structural biology

authors： Maier T,Ferbitz L,Deuerling E,Ban N

更新日期：2005-04-01 00:00:00

abstract：:Continuing investigations into protein-protein interactions have revealed their key role in regulating a wide range of cellular processes. Although efforts to modulate these interactions are more challenging and much less mature than work on conventional drug discovery pathways, significant progress has been made on s...

journal_title：Current opinion in structural biology

authors： Zhao L,Chmielewski J

更新日期：2005-02-01 00:00:00

abstract：:The 5' m7GpppN cap plays an essential role in the life cycle of eukaryotic mRNA and is required for efficient pre-mRNA splicing, export, stability and translation. Nascent pre-mRNA is capped through a series of three enzymatic steps that result in a 5' N7-methyl guanosine linked by an inverted 5'-5' triphosphate bridg...

journal_title：Current opinion in structural biology

authors： Gu M,Lima CD

更新日期：2005-02-01 00:00:00

abstract：:The sema domain was first defined from sequence by Kolodkin and colleagues in the early 1990s, and constitutes the distinctive structural and functional element of semaphorins, their plexin receptors and the receptor tyrosine kinases MET and RON, three protein families with major roles in development, tissue regenerat...

journal_title：Current opinion in structural biology

authors： Gherardi E,Love CA,Esnouf RM,Jones EY

更新日期：2004-12-01 00:00:00

abstract：:ATP- and NAD(+)-dependent DNA ligases, ATP-dependent RNA ligases and GTP-dependent mRNA capping enzymes comprise a superfamily of proteins that catalyze nucleotidyl transfer to polynucleotide 5' ends via covalent enzyme-(lysyl-N)-NMP intermediates. The superfamily is defined by five peptide motifs that line the nucleo...

journal_title：Current opinion in structural biology

authors： Shuman S,Lima CD

更新日期：2004-12-01 00:00:00

abstract：:Achieving the goals of structural genomics initiatives depends on the outcomes of two groups of factors: the number and distribution of experimentally determined protein structures, and our ability to assign novel proteins to known structures (fold recognition) and use them to build models (modeling). The quality of t...

journal_title：Current opinion in structural biology

authors： Friedberg I,Jaroszewski L,Ye Y,Godzik A

更新日期：2004-06-01 00:00:00

abstract：:Recent advances in atomic force microscopy (AFM) imaging of nucleic acids include the visualization of DNA and RNA incorporated into devices and patterns, and into structures based on their sequences or sequence recognition. AFM imaging of nuclear structures has contributed to advances in telomere research and to our ...

journal_title：Current opinion in structural biology

authors： Hansma HG,Kasuya K,Oroudjev E

更新日期：2004-06-01 00:00:00