tertiary protein structure

..Long-range conformational changes couple these functions via allosteric equilibria...

..In addition to the standard web access to the database, users can now query SMART using distributed annotation system (DAS) or through a simple object access protocol (SOAP) based web service...

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..We also identified 106 protein kinase pseudogenes. Chromosomal mapping revealed several small clusters of kinase genes and revealed that 244 kinases map to disease loci or cancer amplicons...

..Overrepresented exceptions in Populus include genes associated with lignocellulosic wall biosynthesis, meristem development, disease resistance, and metabolite transport...

..This model may also explain the stable inheritance of the heterochromatic state...

..Subsequent gene activation by these factors induced antiviral functions, including type I interferon production. Thus, RIG-I is key in the detection and subsequent eradication of the replicating viral genomes...

..Cardif thus functions as an adaptor, linking the cytoplasmic dsRNA receptor RIG-I to the initiation of antiviral programmes...

..SCOP can be accessed at http://scop.mrc-lmb.cam.ac.uk/scop...

..These results suggest that EGFR mutations may predict sensitivity to gefitinib...

..Knockdown' of IPS-1 by small interfering RNA blocked interferon induction by virus infection. Thus, IPS-1 is an adaptor involved in RIG-I- and Mda5-mediated antiviral immune responses...

..These findings greatly expand the role of activated NOTCH1 in the molecular pathogenesis of human T-ALL and provide a strong rationale for targeted therapies that interfere with NOTCH signaling...

..This article describes the freely accessible web server and its architecture, and discusses ways to use MEME effectively to find new sequence patterns in biological sequences and analyze their significance...

..As BRAF is a serine/threonine kinase that is commonly activated by somatic point mutation in human cancer, it may provide new therapeutic opportunities in malignant melanoma...

..Profilin catalyzes the exchange of ADP for ATP, refilling the pool of ATP-actin monomers bound to profilin, ready for elongation...

..Our resulting data set and reusable RNAi library of 16,757 bacterial clones will facilitate systematic analyses of the connections among gene sequence, chromosomal location and gene function in C. elegans...

..The interaction with Eritoran is mediated by a hydrophobic internal pocket in MD-2. Based on structural analysis and mutagenesis experiments on MD-2 and TLR4, we propose a model of TLR4-MD-2 dimerization induced by LPS...

..The link between hemi-methylated DNA, Np95 and Dnmt1 thus establishes key steps of the mechanism for epigenetic inheritance of DNA methylation...

..Here we will try to define some underlying principles...

..This review will focus on the description of the molecular characteristics of members of the DEAD-box protein family and on the enzymatic activities they possess...

..Furthermore, unique inserts within chromodomain 1 of CHD1 block the expected site of H3 tail binding seen in HP1 and Polycomb, instead directing H3 binding to a groove at the inter-chromodomain junction...

..Information on the degree of structural diversity in each superfamily and structural overlaps between superfamilies can now be downloaded from the CATH website...

..This complexity in DNA recognition may be important in gene regulation and in the evolution of transcriptional regulatory networks...

..These data indicate that DNMT3L recognizes histone H3 tails that are unmethylated at lysine 4 and induces de novo DNA methylation by recruitment or activation of DNMT3A2...

..We propose that formation of the TLR1-TLR2 heterodimer brings the intracellular TIR domains close to each other to promote dimerization and initiate signaling...

..Furthermore, it now accepts users' own PDB format files and generates a private set of analyses for each uploaded structure...

..MIDAS lies adjacent to a calcium-binding site with a potential regulatory function...

..These studies thus define Smad7 as an adaptor in an E3 ubiquitin-ligase complex that targets the TGF beta receptor for degradation...

..Ligand binding induces small changes in the orientation of alphaV relative to beta3...

..Many disordered segments fold on binding to their biological targets (coupled folding and binding), whereas others constitute flexible linkers that have a role in the assembly of macromolecular arrays...

..These findings are consistent with a model in which BiP represses signalling through PERK and IRE1 and protein misfolding relieves this repression by effecting the release of BiP from the PERK and IRE1 lumenal domains...

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..O'Reilly Publishers, Sebastopol, CA, http://www.w3.org/TR/soap/] are also available to the users. Various output formats are supported and include text tables, XML documents, as well as various graphs to help interpret the results...

..In this review, we focus on the composition, regulation and function of cullin-RING ligases, and describe how these enzymes can be characterized by a set of general principles...

..These findings clarify the nature of the cap binding site in PB2 and will allow efficient structure-based design of new anti-influenza compounds inhibiting viral transcription...

..The enzyme has a distinctive structure, which includes a helicase domain and dual RNase III motifs. Dicer also contains a region of homology to the RDE1/QDE2/ARGONAUTE family that has been genetically linked to RNAi...

..However, tests with distorted starting coordinates show that PRODRG topologies perform better, both in terms of ligand geometry and of crystallographic R factors...

..More recent servers include DISOPRED for the prediction of protein dynamic disorder and DomPred for domain boundary prediction. These servers are available from our software home page at http://bioinf.cs.ucl.ac.uk/software.html...

..The present review summarizes the impact structural biology has had on our understanding of the mechanisms by which CBMs bind to their target ligands...

..2005), support a model in which Sun proteins tether nesprins in the ONM via interactions spanning the PNS. In this way, Sun proteins and nesprins form a complex that links the nucleoskeleton and cytoskeleton (the LINC complex)...

..quot; The presentation offers not only an up-to-date description of allostery from a theoretical/computational perspective, but also helps to resolve several outstanding issues concerning allostery...

..This review focuses mainly on structural studies of dengue virus...

..We propose that this helix is inserted into one leaflet of the lipid bilayer, inducing curvature. On lipid monolayers epsin alone is sufficient to facilitate the formation of clathrin-coated invaginations...

..A single amino acid substitution (R332P) in the human Trim5alpha can confer the ability to restrict HIV-1, suggesting that small changes during evolution may have profound effects on our susceptibility to cross-species infection...

..In addition, a new series of Sequence Match programs for non-quantitative user-defined motifs has been implemented. Scansite is available via the World Wide Web at http://scansite.mit.edu...

..Given the crucial role of protein disorder in protein-protein interactions and in regulatory processes, we envision that fuzziness will become integral to understanding the interactome...

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..The DREB subfamily included three novel DREB1A- and six DREB2A-related proteins. We analyzed expression of novel genes for these proteins and discuss their roles in stress-responsive gene expression...

..Kay, B. K., Williamson, M. P., Sudol, M. The importance of being proline: the interaction of proline-rich motifs in signaling proteins with their cognate domains...

..Although these insights into interactions among BCL-2 family proteins reveal how these proteins are regulated, a unifying hypothesis for the mechanisms they use to activate caspases remains elusive...

..Specific features of the folded-back structure suggest strategies for inhibiting flavivirus entry...

..These studies establish that activation of ATR by TopBP1 is a crucial step in the initiation of ATR-dependent signaling processes...

..Thus, activation of a "multidomain" proapoptotic member, BAX or BAK, appears to be an essential gateway to mitochondrial dysfunction required for cell death in response to diverse stimuli...

..These data suggest that UHRF1 may help recruit DNMT1 to hemimethylated DNA to facilitate faithful maintenance of DNA methylation...

..These results suggest a stepwise model for P-body assembly with the initial formation of a core mRNA-protein complex that then aggregates through multiple specific mechanisms...

..We discuss the use of analogous point mutations at this position in other KH domains to dissect both structure and function...

..As the results of the CASP6 experiment showed, this new predictor has achieved the highest accuracy yet and significantly improved performance on short disordered regions, while maintaining high performance on long disordered regions...

..These results strongly support a hand-over-hand model of motility, not an inchworm model...

..We also describe results for the F(1) ATPase molecular motor and the Src family of signaling proteins as examples of applications of simulations to specific biological systems...

..We suggest that S. cerevisiae Scm3 defines a previously undescribed family of fungal kinetochore proteins important for CenH3 localization...

..For all services, users can submit their query either by electronic mail or interactively via the World Wide Web...

..These findings go a long way towards explaining the incredible diversity and success of the diatoms in contemporary oceans...

..The use of a quantitative reporter in a comprehensive screen followed by systematic analysis of genetic dependencies should be broadly applicable to functional dissection of complex cellular processes from yeast to human...

..Thus, the RNA interference and stRNA pathways intersect. Both pathways require the RNA-processing enzyme Dicer to produce the active small-RNA component that represses gene expression...

..0 as a unique and valuable helper for protein design, even when the protein structure is not yet known with atomic resolution. Availability: http://gpcr.biocomp.unibo.it/cgi/predictors/I-Mutant2.0/I-Mutant2.0.cgi...

..GAPs are regulated by various controls of their cellular concentrations, by complex interactions with G¿ or with G¿5 through an endogenous G-like domain, and by interaction with multiple other proteins...

..These results demonstrate a role for the PCP pathway in planar polarization in mammals, and identify Scrb1 as a PCP gene...

..The structure is likely to have broad implications for understanding the infectious amyloid state...

..These results show key structural features that explain the ability of talin to mediate inside-out TM signalling...

..We propose that a Z disc MLP/T-cap complex is a key component of the in vivo cardiomyocyte stretch sensor machinery, and that defects in the complex can lead to human DCM and associated heart failure...

..By analyzing the potential molecular basis for the function of these domains, we hope to provide a comprehensive understanding of the function, structure, interaction, and evolution of this important family of domains...

..How and when is the code written and read? How does it contribute to transcription and coordinate RNA processing?..

..pneumophila. Translocation of RalF protein through the phagosomal membrane is a dot/icm-dependent process. Thus, RalF is a substrate of the Dot/Icm secretion apparatus...

..Thus, PTB will induce RNA looping when bound to two separated pyrimidine tracts within the same RNA. This leads to structural models for how PTB functions as an alternative-splicing repressor...

..Our data demonstrate the molecular basis of FPPH and underscore the importance in vivo of the TGF-beta signalling pathway in the maintenance of blood vessel integrity...

..These results suggest that BiP retains ATF6 in the ER by inhibiting its GLSs and that dissociation of BiP during ER stress allows ATF6 to be transported to the Golgi...

..The focus of this review is on the relationship between the GTPase and self-assembly properties of dynamin and its cellular function...

..This opens the possibility that mutations might represent "double-hits" by abrogating the transcriptional and mitochondrial apoptotic activity of p53...

..Highly selective inhibitors of iNOS versus eNOS and neuronal NOS have been identified and some of these have potential in the treatment of a range of inflammatory and other conditions in which iNOS has been implicated...

..Finally, we will discuss the main issues that will need to be addressed in order to bring this promising technology to the patient...

..Because the Tsg101 is recruited by small, conserved viral sequence motifs, agents that mimic these structures are potential inhibitors of the replication of these lethal human pathogens...

..In this review we consider each subtype of PLC in organisms ranging from yeast to mammals and discuss their molecular regulation and biological function...

..The structure, along with mutagenesis data, suggests how UHRF1 acts as a key factor for DNMT1 maintenance methylation through recognition of a fundamental unit of epigenetic inheritance, mCpG...

..The complex structure suggests that the successive flip out of the pre-existing methylated cytosine and the target cytosine to be methylated is associated with the coordinated transfer of the hemi-methylated CpG site from UHRF1 to Dnmt1...

..Additional co-chaperones fine-tune this chaperone cycle. For specific tasks the Hsp70 cycle is coupled to the action of other chaperones, such as Hsp90 and Hsp100...

..Our studies provide a plausible mechanism by which the induction of p53 can be modulated by DNA-PK (or other protein kinases with similar specificity) in response to DNA damage...

..Thus, a limited repertoire of promiscuous domains makes a major contribution to the diversity and evolvability of eukaryotic proteomes and signaling networks...

..Therefore, MAP2 is an anchoring protein of PKA in dendrites, whose loss leads to reduced amount of dendritic and total PKA and reduced activation of CREB...

..This review focuses on the roles of the La protein in small RNA biogenesis and also discusses data that implicate the La protein in the translation of specific mRNAs...

..These results confirm, but massively extend, the very sparse observations previously obtained from detailed characterization of individual mutants in other organisms...

..In the chaperone conformation, the protease domain of DegP exists in an inactive state, in which substrate binding in addition to catalysis is abolished...

..We propose a model wherein synaptotagmin cooperates with the SNAREs in bringing the synaptic vesicle and plasma membranes together and accelerates membrane fusion through the highly positive electrostatic potential of its C(2)B domain...

..The structure suggests a mechanism for the methylation reaction and provides the structural basis for functional characterization of the HKMT family and the SET domain...

..Our results establish that FAK is an important receptor-proximal link between growth-factor-receptor and integrin signalling pathways...

..This mechanism propagates allostery over long distances and couples cytoskeleton attachment of integrins to their high-affinity state...

..Identification of the role of the HD-GYP domain thus increases our understanding of a signaling network whose importance to the lifestyle of diverse bacteria is now emerging...

..These results indicate that the CRMP-2/Kinesin-1 complex regulates soluble tubulin transport to the distal part of the growing axon...

..The here described public releases, TRANSFAC 7.0 and TRANSCompel 7.0, are accessible under http://www.gene-regulation.com/pub/databases.html...

..Therefore, biochemical and genetic evidence presented here establishes PilZ as a long sought after c-di-GMP-binding domain and YcgR as a c-di-GMP receptor affecting motility in enterobacteria...

..Recombinant SC35 is sufficient to rescue this defect in nuclear run-on experiments. These findings suggest a reciprocal functional relationship between the transcription and splicing machineries during gene expression...

..Thus, we identify the JmjC domain as a novel demethylase signature motif and uncover a protein demethylation mechanism that is conserved from yeast to human...

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..A goal then, is to elucidate the oligomerization state of human FSHR and how it relates to hFSHR activation and attenuation of hormonal response. ..

..Specific Aims 2 and 3 propose to start with the gelatinase model to define biochemical interactions of gelatinases with substrate and to examine how these can enable processive diffusion and enzyme activation. ..

..Specific Aims 2 and 3 propose to start with the gelatinase model to define biochemical interactions of gelatinases with substrate and to examine how these can enable processive diffusion and enzyme activation. ..

..We propose to study intraheterodimerization interactions between RXR and the minimal peptide by nuclear magnetic resonance techniques. ..

..g. neoplastic transformation. ..

..Better understanding the mechanisms that mobilize that uptake will allow design of means to inhibit that essential process. ..

..Such aptamers could be used for signaling the presence of proteins associated with particular disease states, or potentially as pharmaceutical agents that can block or modify the action of these proteins. ..

..and torsional angle dynamics, and (f) a new proposed approach for the selection of the predicted tertiary protein structure, from the ensemble of low energy protein structures, using a distance dependent force field developed ..

..may depend on the strength of a base positioned close to the chromophore-forming amino acids in the tertiary protein structure. Therefore, specific sets of residues in the immediate chromophore environment will be the primary ..

..The structural and functional information obtained in this project is to be placed in the public domain by timely deposition in publicly available databases. ..

..Besides being important from a fundamental point of view, such knowledge could also be used by pharmaceutical companies to design better drugs against disease-causing bacteria. ..

..These are scavenger receptor rich glycoprotein 340 (gp340) and human neutrophil defensins (HNPs). These studies should elucidate important aspects of defense against IAV and be relevant to treatment and prevention strategies. ..

..These structures will also allow us to determine whether mechanistic differences exist between LCFA and xenobiotics transport. ..

..This, in turn, will make it easier to identify key biological features such as the presence and conformation of bound ligands, and the nature of hinge and inter-domain motions. ..

..These experiments should yield important insights into basic collection biology and demonstrate that enhancement of collectin-mediated pulmonary host defense can be achieved in vivo through rational alteration of wild type collectins. ..

..The algorithms and computation tools developed as part of this work will be distributed freely, and we will provide web-based state of the art analysis of structures submitted by external researchers. ..

..These experiments will greatly enhance knoledge of the basic molecular mechanisms responsible for electrical excitability...

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..abstract_text> ..

..Consequently, these aims are highly relevant to the vision statement of the NEI, and they address several major program goals and objectives of the Retinal Diseases Program. ..

..Structural studies with HMG-D will be valuable for understanding DNA recognition at a level of detail that will be helpful in the design of improved anti-tumor drugs. ..

..Understanding transcriptional control of LN isoform expression will add new insights into the role that LN plays in normal glomerulogenesis and that becomes disordered in glomerular disease. ..

..Such knowledge may result in the identification of novel targets for therapy and/or diagnosis of asthma. ..

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..These funds, if granted, will aid immeasurably in allowing the Gordon Research Conference to fulfill its function to stimulate further creativity in bone, cartilage and tooth research. ..