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Bioline International Official Site (site up-dated regularly) Ultrastructure of spermiogenesis, spermatozoa and the tegument in Atriaster sp. The surface topography of Pseudothoracocotyla indica (Unnitham, 1956) (Monogenea) from the gills of Scom-beromorus commerson. The surface topography and ultrastructure of the tegument and haptor of Pricea multae (Monogenea). www.bioline.org.br /request?oc01085   (2122 words)

Memórias do Instituto Oswaldo Cruz - Scanning and transmission electron microscopy of the tegument of Paranaella ...   (Site not responding. Last check: 2007-11-04) The surface topography and ultrastructure of the tegument of Paranaella luquei Kohn, Baptista-Farias and Cohen, 2000, a microcotylid monogenean parasite from the gills of Hypostomus regani (Ihering, 1905) (Loricariidae) was studied by scanning (SEM) and transmission electron microscopy (TEM). By SEM, it was observed that the tegument presents transversal ridges, forming folds in the ventral and dorsal surfaces and microvillous-like tegumental projections in the anterior and median regions of body. The tegument is made up of a syncytium delimited by apical and basal plasma membranes, containing inclusion bodies and mitochondria, connected to the nucleated region by means of cytoplasmatic processes. www.scielo.br /scielo.php?script=sci_arttext&pid=S0074-02762001000400019&lng=en&nrm=iso&tlng=en   (2134 words)

FLATWORM The larval tegument is similar to that of the adult and has a distal cytoplasmic, syncytial layer at the surface with internal cytons. The tegument of adult trematodes is not modified with microvilluslike structures that increase absorptive surface area, but some species have deep pits and channels that may serve that purpose (Figure 15.9). It is a bulbous ending in the tegument with a short, modified cilium projecting from it, and the cilium is enclosed along its length by a thin layer of tegument. faculty.pnc.edu /jcamp/parasit/flatworm.html   (15775 words)

Proceedings of the Oklahoma Academy of Science The results confirm that glucose is absorbed by the tegument; however, galactose and mannose appear to be absorbed by the gut. Investigations into the absorptive activities of the tegument have shown that carbohydrates are actively, and in some instances exclusively, transported into the organism by that structure (1,2). Glucose was chosen because of its role in schistosome metabolism (16), because it is taken up exclusively via the tegument (2), and because Stein and Lumsden (13) and Wilson and Barnes (6) have reported that mucopolysaccharides are important components of the schistosome tegument. digital.library.okstate.edu /oas/oas_htm_files/v63/p12_20.html   (3293 words)

CHAPTER IV [The Blood and the Third Anatomical Element by Antoine Bechamp] That which has given rise to doubt as to the existence of a tegument to the red globule is that the blood steeped in water seems to be altogether dissolved in it: the globules disappear so completely that under the microscope not a vestige of them can be discovered. But, as we shall presently see, that apparent solution of the globules is only the osmotic issuance of the interior part, soluble in water, across the envelope: the cellular tegument remaining entire is invisible under the microscope only because its refracting index is the same as that of the ambient liquid. The mode of demonstrating the unbroken tegument of the red globule of the blood, steeped in water, consists in rendering its refraction different from that of the liquid which results from this mixture. www.whale.to /v/bechamp4.html   (1739 words)

From the Cover: Targeting of herpesvirus capsid transport in axons is coupled to association with specific sets of ... tegument proteins are deposited into the cytosol (4). The proportion of transported capsids alone and capsids complexed with tegument is presented as the percentage of the total number of transported capsids (n) observed for each virus. Axon terminals of dissociated DRG sensory neurons infected with the dual-fluorescent viruses were imaged 12–15 or 7–12 hpi (VP13/14 early) for accumulation of capsid and tegument proteins. www.pnas.org /cgi/content/full/102/16/5832   (4630 words)

Realtime Herpesvirus   (Site not responding. Last check: 2007-11-04) The HSV-1 virion comprises three concentric compartments: the capsid (100 nm in diameter, containing the viral DNA), the tegument (a shell surrounding the capsid composed of approximately 15 proteins) and the envelope (approximately 200 nm in diameter, composed of a trilamminar membrane containing 11 glycoproteins) (15). Certain tegument proteins are located near sites within the nucleus where the capsid is constructed, consistent with the notion that they are incorporated into the virion in the nucleus (7, 29). In contrast, other tegument proteins are located primarily in the cytoplasm, consistent with the idea that the initial nuclear envelopment of the capsid is transient and that tegument proteins are incorporated and final envelopment occurs in cytoplasmic compartments (4, 9, 10, 12, 13, 16, 30, 33). thalamus.wustl.edu /willardlab/hsv.html   (6943 words)

Molecular Identification of a Schistosoma mansoni Tegumental Protein with Similarity to Cytoplasmic Dynein Light Chains ... The tegument covering the cercariae, schistosomula, lung stage worms, and adult worms is an anucleated syncytium that serves as the protective barrier between the parasite and the host. The tegument in three of these four life stages (not cercariae) is bound by a unique double lipid bilayer structure called the heptalaminate membrane. The organelles found in the tegument are made in the subtegumental cell, which contains all of the necessary components for protein synthesis and organelle development (5). www.jbc.org /cgi/content/full/271/42/26117   (5446 words)

SLU MMI -- Lynda A. Morrison In addition, we are using molecular genetics to improve the immunogenicity of replication-defective viruses, inserting immune modulatory molecules into the virus' genome and abrogating viral immune evasion strategies. We are investigating the mechanism of vhs interference with this innate response to virus infection. A third area of research is phosphorylation of tegument components mediated by the UL13 viral kinase, and the synthesis, modification and function of the VP22 protein, one of the targets of UL13 activity. medschool.slu.edu /mmi/faculty/morrison.html   (330 words)

The Schistosome Tegument The tegument is the metabolically active syncytial outer surface of the parasite. In the schistosomes the outer surface of the tegument undergoes considerable changes as the cercariae penetrate the skin of the definitive host. The cercarial tegument has an outer lipid bilayer which appears as a trilaminate layer in EM, and is covered with a glycocalyx. www.path.cam.ac.uk /~schisto/SchistoLife/Morphology/tegument.html   (170 words)

Sequential Localization of Two Herpes Simplex Virus Tegument Proteins to Punctate Nuclear Dots Adjacent to ICP0 Domains ... VP16 interacts via its activation domain with VP22, a tegument protein of herpes simplex virus, and is relocated to a novel macromolecular assembly in coexpressing cells. Differences in the intracellular localization and fate of herpes simplex virus tegument proteins early in the infection of Vero cells. Bovine herpesvirus 1 tegument protein vp22 interacts with histones, and the carboxyl terminus of vp22 is required for nuclear localization. jvi.asm.org /cgi/content/full/76/20/10365   (6034 words)

Abstract 36 — Fourth HIV DRP Symposium: Antiviral Drug Resistance Herpes simplex virus (HSV), the causative agent of oral cold sores and a rare form of encephalitis, is a DNA virus of high complexity. It consists of a nucleocapsid surrounded by a protein compartment known as the tegument, which in turn is surrounded by a membrane envelope. On the opposite side, the capsid and envelope are separated by ~35 nm of tegument. web.ncifcrf.gov /campus/symposium/abstract_36.html   (242 words)

Acanthocephala -- Encylopedic Reference of Parasitology The tegument is supported by underlying fibres of connective tissue, partly identified as collagen, of equal thickness in all parts of the body, and by cords of circular (only in the metasoma) muscles and longitudinal muscles (in both parts of the body; The syncytial tegument of the Acanthocephala is delimited by a plasma membrane carrying a filamentous Note the tegumental cover of the hook`s connective tissue (CH), the lipoid coat (LC) on the tegument and the hook, the fused crypts of the outer membrane (FC) supported by fibres, and the fused crypts of the basal labyrinth (FB) which possibly are continuous with the latter fused crypts. parasitology.informatik.uni-wuerzburg.de /login/n/h/0008.html   (7254 words)

Paramyosin-Paper However, neither immunohistologically nor on Western blots of isolated tegument, were indications found for the presence of paramyosin in the tegument. Parallel blots of teguments and carcasses were probed with antiserum raised against homogenates of total schistosomes to document that sufficient quantities of proteins were loaded to visualize immune reactions (Fig. However, the reaction with the tegument and muscles was relatively weak, and the postacetabular glands were labelled in only 5% of the larvae. www.uni-duesseldorf.de /WWW/MathNat/Parasitologie/pamy_pap.htm   (4362 words)

The Big Picture Book of Viruses - Equine Herpesvirus Type 1   (Site not responding. Last check: 2007-11-04) In three of the four virions shown, the envelopes have been penetrated by negative stain, permitting observation of the icosahedral capsids and the tegument surrounding them. The fragile tegument is easily damaged during dehydration after staining, but some remains attached to capsids. Images such as these suggest that the tegument could be attached at or near capsid vertices. www.virology.net /Big_Virology/Special/EHV1/EHVpage.html   (197 words)

Herpesvirus Assembly and Egress -- Mettenleiter 76 (4): 1537 -- The Journal of Virology However, large amounts of tegument material may be incorporated into virions (G and H), which is clearly observed to occur in the cytoplasm only (E to F; see also reference 34). (J) Accumulations of tegumented PrV capsids in the absence of gE/gI and gM (6). Characterization of enveloped tegument structures (L-particles) produced by alphaherpesviruses: integrity of the tegument does not depend on the presence of capsid or envelope. jvi.asm.org /cgi/content/full/76/4/1537   (7674 words)

Platyhelminthes -- Encylopedic Reference of Parasitology In the past 30 years the teguments of members of nearly all groups of parasitic platyhelminthes and most of their developmental stages have been investigated. These peculiar organelles are needed for steady growth of the tegument and for replacement of the cell membrane and the surface coat which appears as a fuzzy or filamentous material of varying thickness. Note that there is an intensively stained membranocalyx, whereas the tegument is free of stain, except for a slight reaction in the ductules (CO) that form connections to the subtegumental cells. parasitology.informatik.uni-wuerzburg.de /login/n/h/1111.html   (5368 words)

[No title] While the adult worms possess a functional mouth and gut, most nutrients are imported across the parasite’s body surface (or tegument). One protein complex that is important in the uptake of amino acids across the tegument by intra-vascular schistosomes is designated SPRM1 (Schistosome permease 1). When SPRM1lc is expressed with a heterologous (human) heavy chain in Xenopus oocytes, it facilitates the transport of the basic amino acids arginine, lysine, histidine as well as leucine, phenylalanine, methionine and glutamine. www.tufts.edu /central/research/researchdays/InfectiousDisease/IDAbstracts/57.doc   (295 words)

Fluorescent Tagging of Herpes Simplex Virus Tegument Protein VP13/14 in Virus Infection -- Donnelly and Elliott 75 (6): ... tegument assembly to occur either in the nucleus or at a later Images were collected at high magnification and are presented either as a single merged image of 10 Z sections (A, B, and C), as a single Z section (D) or as Z sections from the top, middle, or bottom of the cell (E and F). We have previously described the use of a fluorescently tagged tegument protein in a study of a recombinant herpes simplex jvi.asm.org /cgi/content/full/75/6/2575   (5077 words)

Bioline International Official Site (site up-dated regularly) The identification and characterization of proteins associated with the tegument is central to our understanding of the function of this structure, and also provides probes for defining the mechanisms of membrane formation. Thus the genes for these proteins are regulated during development and are coexpressed in the tegument of adult worms. On the other hand the adsorption of soluble proteins derived from the parasite to the surface seems to be relevant for stimulation of a strong protective immunity (as is the case of the vaccine candidates GST, TPI, GAPDH and PGK). www.bioline.org.br /request?oc98144   (1142 words)

BIOL414/614 at UMBC - mRNA_transport_to_uninfected_cells_by_a_viral_tegument_protein Sciortino et al studies the herpes simplex virions and have identified a protein dubbed, VP22, which functions as a sort of vector to mediate the transfer of viral mRNA to uninfected cells for subsequent expression and infection. Thus far VP22 is the only tegument protein isolated with such an activity of actually packaging mRNA and transporting it to particularly uninfected cells. Previous literature reports two proteins with distinct functions of first packaging and then transporting viral mRNA, thus the isolation of VP22 is a pioneer and is in a class all by itself. www.umbc.edu /bioclass/biol414/wiki/index.php?page=mRNA_transport_to_uninfected_cells_by_a_viral_tegument_protein   (645 words)

Molecular Biology of Pseudorabies Virus: Impact on Neurovirology and Veterinary Medicine -- Pomeranz et al. 69 (3): 462 ... The double-stranded DNA genome is housed in an icosahedral capsid. The tegument is a collection of approximately 12 proteins organized into at least two layers, one which interacts with envelope proteins and one that is closely associated with the capsid. The capsid and tightly bound inner tegument proteins are transported along microtubules to the cell nucleus. mmbr.asm.org /cgi/content/full/69/3/462   (9540 words)

Proceedings of the Oklahoma Academy of Science After the five-hr incubation, the tegument was heavily labeled. Labeling over the musculature and tegument was considerably increased after four-hr incubation (Fig. Ultrastructural radioautographs of the tissue demonstrated labeling associated with the tegument, the subtegumental musculature, and the vitelline globules in the underlying tissues. digital.library.okstate.edu /oas/oas_htm_files/v63/p12_20nf.html   (3293 words)

Expression et caractérisation de quatre protéines du virus de la maladie de Marek homologues aux ... Elliott, G., Mouzakitis, G. et O'Hare, P. VP16 interacts via its activation domain with VP22, a tegument protein of herpes simplex virus, and is relocated to a novel macromolecular assembly in coexpressing cells. McLauchlan, J. The abundance of the herpes simplex virus type 1 UL37 tegument protein in virus particles is closely controlled. McLauchlan, J. et Rixon, F. Characterization of enveloped tegument structures (L particles) produced by alphaherpesviruses: integrity of the tegument does not depend on the presence of capsid or envelope. www.tours.inra.fr /urbase/internet/theses/2dorange/these_back.html   (7796 words)

Enquist Laboratory, Princeton University   (Site not responding. Last check: 2007-11-04) A linear double-stranded DNA genome of 143,800 bp is packaged within an icosahedral capsid (125 nm diameter) to form the nucleocapsid. The capsid is embedded in a matrix known as the tegument layer, which contains many virus-coded proteins. The tegument is itself surrounded by the envelope, a lipid membrane containing several viral glycoproteins. www.molbio.princeton.edu /labs/enquist/research/PRVstructure.html   (127 words)

The products of human cytomegalovirus genes UL23, UL24, UL43 and US22 are tegument components -- Adair et al. 83 (6): ... Irmiere, A. and Gibson, W. Isolation and characterization of a noninfectious virion-like particle released from cells infected with the human strains of cytomegalovirus. Sanchez, V., Greis, K. tul, E. and Britt, W. Accumulation of virion tegument and envelope proteins in a stable cytoplasmic compartment during human cytomegalovirus replication: characterization of a potential site of virus assembly. Stannard, L. and Hardie, D. An Fc receptor for human immunoglobulin G is located within the tegument of human cytomegalovirus. vir.sgmjournals.org /cgi/content/full/83/6/1315   (4651 words)

Herpes simplex virus type 1 tegument protein VP22 interacts with TAF-I proteins and inhibits nucleosome assembly but ... Elliott, G. and O'Hare, P. Herpes simplex virus type 1 tegument protein VP22 induces the stabilization and hyperacetylation of microtubules. Morrison, E. E., Stevenson, A. J., Wang, Y. and Meredith, D. Differences in the intracellular localization and fate of herpes simplex virus tegument proteins early in the infection of Vero cells. Ren, X., Harms, J. and Splitter, G. Bovine herpesvirus 1 tegument protein VP22 interacts with histones, and the carboxyl terminus of VP22 is required for nuclear localization. vir.sgmjournals.org /cgi/content/full/84/9/2501   (5078 words)

Channel 9 Tegument - a Network Administrator located in Peoria, Illinois. This Niner has chosen not to share their story. This Niner has not submitted any samples to the SandBox. channel9.msdn.com /Niners/Tegument   (36 words)

Multiple Choice Quiz A cuticle is different from a tegument in that a cuticle is _______,while a tegument is The animals that are leaf-shaped endoparasites, have a tegument, and have complex life cycles are members of the class In some turbellarians, the yolk that provides nutrition for the developing embryo is contained within the egg cell, a condition known as ectolecithal. highered.mcgraw-hill.com /sites/0072349034/student_view0/chapter8/chapter_quizzing.html   (762 words)

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