Evolution of the microtubular cytoskeleton (flagellar apparatus) in parasitic protists.

abstract：:We have isolated a 0.3-kb HaeIII restriction fragment from Trypanosoma brucei which contains two tRNA genes. Secondary structure models predict that the two genes identified encode tRNA molecules which specify glycine (anticodon UCC) and leucine (anticodon CAG). The two genes are separated by 86 nucleotides, transcrib...

journal_title：Molecular and biochemical parasitology

authors： Campbell DA,Suyama Y,Simpson L

更新日期：1989-12-01 00:00:00

abstract：:A Trypanosoma cruzi small subunit ribosomal RNA gene was sequenced from genomic recombinant plasmid clones. The assigned coding region was 2319 bp, the longest SSU rRNA gene described to date. On the basis of comparisons with published sequences from Crithidia fasciculata, Trypanosoma brucei, and Leishmania donovani, ...

journal_title：Molecular and biochemical parasitology

authors： Hernández R,Rios P,Valdés AM,Piñero D

更新日期：1990-06-01 00:00:00

abstract：:During the replicative cycle of many double-stranded RNA viruses, transcription of particles with a double-stranded RNA genome alternates with replication of particles containing a single-stranded genome. In virions infecting some strains of Leishmania guyanensis the putative transcriptase and replicase activities of ...

journal_title：Molecular and biochemical parasitology

authors： Weeks RS,Patterson JL,Stuart K,Widmer G

更新日期：1992-06-01 00:00:00

abstract：:The Plasmodium falciparum Erythrocyte Binding Antigen-175, EBA-175, is a soluble merozoite stage parasite protein which binds to glycophorin A surface receptors on human erythrocytes. We have expressed two conserved cysteine-rich regions, region II and region VI, of this protein as soluble His-tagged polypeptides in i...

journal_title：Molecular and biochemical parasitology

authors： Ockenhouse CF,Barbosa A,Blackall DP,Murphy CI,Kashala O,Dutta S,Lanar DE,Daugherty JR

更新日期：2001-03-01 00:00:00

abstract：:Tubulin-binding cofactor C stimulates GTPase activity and contributes to the release of the heterodimeric α/β-tubulin from a super-complex of tubulin monomers and two ancillary cofactors. We have determined the 2.2 Å resolution crystal structure of the C-terminal domain of tubulin-binding cofactor C from Leishmania ma...

journal_title：Molecular and biochemical parasitology

authors： Barrack KL,Fyfe PK,Finney AJ,Hunter WN

更新日期：2015-05-01 00:00:00

abstract：:Gene expression and its regulation was studied in the rat tapeworm, Hymenolepis diminuta, during strobilization. RNAs extracted from the different developmental stages of the parasite were translated in vitro in a rabbit reticulocyte lysate system. Two-dimensional patterns of the translational products were compared w...

journal_title：Molecular and biochemical parasitology

authors： Siddiqui AA,Karcz SR,Podesta RB

更新日期：1987-08-01 00:00:00

abstract：:Thrombospondin-related anonymous protein (TRAP) family members participate in attachment and invasion of host cells by apicomplexan parasites. A TRAP homologue in Neospora caninum strain Nc-1 (NcMIC2) was cloned, sequenced and found to be 61% identical (75% similar) at the amino acid level to Toxoplasma gondii MIC2 (T...

journal_title：Molecular and biochemical parasitology

authors： Lovett JL,Howe DK,Sibley LD

更新日期：2000-03-15 00:00:00

abstract：:Glutathione S-transferases (GSTs) constitute a major detoxification mechanism in helminth organisms and are regarded vaccine candidates against helminth infections. Onchocerca volvulus glutathione-binding proteins were purified from the aqueous soluble fraction of homogenised adult females by affinity chromatography o...

journal_title：Molecular and biochemical parasitology

authors： Salinas G,Braun G,Taylor DW

更新日期：1994-07-01 00:00:00

abstract：:Two cloned chromosomal segments of the hemoprotozoan Babesa bovis bearing genes from the polymorphic locus designated BabR were inserted into plasmid vector YCp19, cloned in Escherichia coli and then introduced into Saccharomyces cerevisiae. Both genes were transcribed producing poly(A+) RNAs. In at least one case, th...

journal_title：Molecular and biochemical parasitology

authors： Kemp DJ,Easton KE,Cowman AF

更新日期：1984-05-01 00:00:00

abstract：:A 25-kb CpFAS1 gene from Cryptosporidium parvum has been engineered and expressed as five individual maltose-binding protein (MBP)-fusion proteins: an N-terminal loading unit, three fatty acyl elongation modules, and a C-terminal reductase. Enzymatic activities of all domains (except the reductase) were individually a...

journal_title：Molecular and biochemical parasitology

authors： Zhu G,Li Y,Cai X,Millership JJ,Marchewka MJ,Keithly JS

更新日期：2004-03-01 00:00:00

abstract：:Phosphatidylcholine is the most abundant phospholipid in the membranes of the human parasite Leishmania. The metabolic pathways leading to its biosynthesis are likely to play a critical role in parasite development and survival and may offer a good target for antileishmanial chemotherapy. Phosphatidylcholine synthesis...

journal_title：Molecular and biochemical parasitology

authors： Zufferey R,Mamoun CB

更新日期：2002-11-01 00:00:00

abstract：:Investigating the proteome of intracellular Leishmania amastigotes has recently become possible due to the exploitation of fluorescence activated intracellular parasite sorting. Here, we employed this technology in combination with gel free analysis to greatly improve proteome coverage and suggest proteins putatively ...

journal_title：Molecular and biochemical parasitology

authors： Paape D,Barrios-Llerena ME,Le Bihan T,Mackay L,Aebischer T

更新日期：2010-02-01 00:00:00

abstract：:Procyclic Trypanosoma brucei brucei strain 366D is susceptible to DL-alpha-difluoromethylornithine (DFMO) with an in vitro ED50 value of 225 microM. A mutant of the procyclic strain resistant to 20 mM of DFMO was isolated by serial in vitro passages of the organisms in increasing concentrations of the drug. Drug resis...

journal_title：Molecular and biochemical parasitology

authors： Phillips MA,Wang CC

更新日期：1987-01-02 00:00:00

abstract：:We have purified and characterized the Ascaris suum gamma-glutamylcysteine synthetase, the rate-limiting step in the glutathione biosynthesis. The purified enzyme exhibited a specific activity of 18 U (mg protein)-1. Estimation of the molecular mass of the native enzyme by FPLC on Superdex S-200 revealed the presence ...

journal_title：Molecular and biochemical parasitology

authors： Hussein AS,Walter RD

更新日期：1995-06-01 00:00:00

abstract：:The precursor of the glycosylphosphatidylinositol membrane anchor of the variant surface glycoprotein of Trypanosoma brucei is known as glycolipid A and it has the structure: EtN-PO4-6Man alpha 1-2Man alpha 1-6Man alpha 1-4GlcN alpha 1-6myo-inositol-PO4-(sn-1,2-dimyristoylglycerol). This precursor exists in equilibriu...

journal_title：Molecular and biochemical parasitology

authors： Güther ML,Treumann A,Ferguson MA

更新日期：1996-05-01 00:00:00

abstract：:Phosphoinositides comprise a group of essential phospholipids that control a variety of cellular functions. In the case of the human malaria parasite Plasmodium falciparum, phosphoinositides have been shown to trigger exflagellation and to affect haemoglobin endocytosis and maturation of the parasite's digestive vacuo...

journal_title：Molecular and biochemical parasitology

authors： Krüger T,Sanchez CP,Lanzer M

更新日期：2010-08-01 00:00:00

abstract：:The FMRFamide-related peptides (FaRPs), KHEYLRFamide (AF2) and KSAYMRFamide (PF3) were structurally characterised from the parasitic nematode of sheep, Haemonchus contortus (MH isolate). Both peptides were sequenced in a single gas-phase sequencing run and their structure confirmed by mass spectrometry which identifie...

journal_title：Molecular and biochemical parasitology

authors： Marks NJ,Sangster NC,Maule AG,Halton DW,Thompson DP,Geary TG,Shaw C

更新日期：1999-05-25 00:00:00

abstract：:Apicomplexa parasites use complex cell cycles to replicate that are not well understood mechanistically. We have established a robust forward genetic strategy to identify the essential components of parasite cell division. Here we describe a novel temperature sensitive Toxoplasma strain, mutant 13-20C2, which growth a...

journal_title：Molecular and biochemical parasitology

authors： Suvorova ES,Lehmann MM,Kratzer S,White MW

更新日期：2012-01-01 00:00:00

abstract：:Proteases play central roles in cell invasion by Toxoplasma gondii and other apicomplexan parasites. Herein we report the cloning and characterization of a novel secretory putative metalloproteinase, Toxolysin 4 (TLN4). T. gondii tachyzoites store TLN4 in the micronemes and secrete it in response to elevated calcium, ...

journal_title：Molecular and biochemical parasitology

authors： Laliberté J,Carruthers VB

更新日期：2011-05-01 00:00:00

abstract：:The complex molecular systems involved in the process of sex-differentiation and fertility in Schistosoma mansoni have not yet been completely described. Using a 4608-element cDNA microarray, we have now determined 90 and 139 genes with significantly (q-value

journal_title：Molecular and biochemical parasitology

authors： DeMarco R,Oliveira KC,Venancio TM,Verjovski-Almeida S

更新日期：2006-12-01 00:00:00

abstract：:The heat shock response was studied as a model for control of gene expression and protein synthesis in Giardia lamblia. Cultured trophozoites were metabolically labelled with [35S]methionine, and proteins were analysed by SDS-polyacrylamide gel electrophoresis and fluorography. A temperature shift from 37 degrees C to...

journal_title：Molecular and biochemical parasitology

authors： Lindley TA,Chakraborty PR,Edlind TD

更新日期：1988-03-01 00:00:00

abstract：:Intraerythrocytic Plasmodium falciparum digests vast amounts of hemoglobin within an acidic food vacuole (FV). Four homologous aspartic proteases participate in hemoglobin degradation within the FV. Plasmepsin (PM) I and II are thought to initiate degradation of the native hemoglobin molecule. PM IV and histo-aspartic...

journal_title：Molecular and biochemical parasitology

authors： Banerjee R,Francis SE,Goldberg DE

更新日期：2003-07-01 00:00:00

abstract：:Intra-erythrocytic Plasmodium parasites digest host cell haemoglobin and use the liberated amino acids for protein synthesis. Although several endoproteases (aspartic, cysteine, and metallo-) have been shown to be involved in the initial stages of haemoglobin degradation, little is known about the steps immediately be...

journal_title：Molecular and biochemical parasitology

authors： Gavigan CS,Dalton JP,Bell A

更新日期：2001-09-28 00:00:00

abstract：:Contrary to previous reports in the literature, bloodstream forms of the haemoflagellate protozoan Trypanosoma brucei brucei are not deficient in their ability to metabolize hydrogen peroxide, although they either lack or only possess the normal enzymes for H2O2 detoxification, catalase (EC 1.11.1.6) and glutathione p...

journal_title：Molecular and biochemical parasitology

authors： Penketh PG,Klein RA

更新日期：1986-08-01 00:00:00

abstract：:Exp-1 is an antigen of Plasmodium falciparum which is transported from the parasite cell to the membrane of the parasitophorous vacuole and to membranous compartments in the erythrocyte. To investigate how this protein is transported, we studied the synthesis and membrane translocation of exp-1 in a cell-free system. ...

journal_title：Molecular and biochemical parasitology

authors： Günther K,Tümmler M,Arnold HH,Ridley R,Goman M,Scaife JG,Lingelbach K

更新日期：1991-05-01 00:00:00

abstract：:The major merozoite-piroplasm surface antigen (mMPSA) of Theileria annulata, Tams1, is known to be antigenically diverse. The possession of variable N-linked glycosylation sites and removal of monoclonal antibody 5E1 reactivity by mild periodate treatment suggested, previously, that divergent epitopes may be conferred...

journal_title：Molecular and biochemical parasitology

authors： Katzer F,McKellar S,Ferguson MA,d'Oliveira C,Shiels BR

更新日期：2002-06-01 00:00:00

abstract：:Genetic transformation of malaria parasites has been limited by the number of selectable markers available. For the rodent malaria parasite, Plasmodium berghei, only a single selection marker has been at hand, utilising the dihydrofolate reductase-thymidylate synthase gene from either P. berghei or Toxoplasma gondii t...

journal_title：Molecular and biochemical parasitology

authors： de Koning-Ward TF,Fidock DA,Thathy V,Menard R,van Spaendonk RM,Waters AP,Janse CJ

更新日期：2000-03-05 00:00:00

abstract：:Soon after infecting a mammalian host, cercariae of Schistosoma mansoni rapidly undergo a series of morphologic and biochemical adaptations associated with transformation to their next developmental stage, the schistosomulum. Few of these changes are associated with alterations in gene expression except for an apparen...

journal_title：Molecular and biochemical parasitology

authors： Blanton RE,Licate LS

更新日期：1992-04-01 00:00:00

abstract：:An axenic cultivation system was used to study the differentiation of Trypanosoma brucei bloodstream forms from long slender to short stumpy-like forms. Trypanosomes in the logarithmic phase are similar to long slender bloodstream forms freshly isolated from infected mice, differing only in the rate of oxygen uptake. ...

journal_title：Molecular and biochemical parasitology

authors： Hamm B,Schindler A,Mecke D,Duszenko M

更新日期：1990-04-01 00:00:00

abstract：:The effect of 9 monosaccharides which constitute cell surface carbohydrates on the infection of bovine embryonic skin and muscle (BESM) cells by Trypanosoma cruzi trypomastigotes and Toxoplasma gondii tachyzoites was assayed. Most of the monosaccharides tested stimulated the infection of BESM cells by T. gondii; none ...

journal_title：Molecular and biochemical parasitology

authors： Crane MS,Dvorak JA

更新日期：1982-05-01 00:00:00