Abstract:
:The conversion of prion protein (PrP) to the pathogenic PrPSc conformation is central to prion disease. Previous studies revealed that PrP interacts with lipids and the interaction induces PrP conformational changes, yet it remains unclear whether in the absence of any denaturing treatment, PrP-lipid interaction is sufficient to convert PrP to the classic proteinase K-resistant conformation. Using recombinant mouse PrP, we analyzed PrP-lipid interaction under physiological conditions and followed lipid-induced PrP conformational change with proteinase K (PK) digestion. We found that the PrP-lipid interaction was initiated by electrostatic contact and followed by hydrophobic interaction. The PrP-lipid interaction converted full-length alpha-helix-rich recombinant PrP to different forms. A significant portion of PrP gained a conformation reminiscent of PrPSc, with a PrPSc-like PK-resistant core and increased beta-sheet content. The efficiency for lipid-induced PrP conversion depended on lipid headgroup structure and/or the arrangement of lipids on the surface of vesicles. When lipid vesicles were disrupted by Triton X-100, PrP aggregation was necessary to maintain the lipid-induced PrPSc-like conformation. However, the PK resistance of lipid-induced PrPSc-like conformation does not depend on amyloid fiber formation. Our results clearly revealed that the lipid interaction can overcome the energy barrier and convert full-length alpha-helix-rich PrP to a PrPSc-like conformation under physiological conditions, supporting the relevance of lipid-induced PrP conformational change to in vivo PrP conversion.
journal_name
Biochemistryjournal_title
Biochemistryauthors
Wang F,Yang F,Hu Y,Wang X,Wang X,Jin C,Ma Jdoi
10.1021/bi700299hsubject
Has Abstractpub_date
2007-06-12 00:00:00pages
7045-53issue
23eissn
0006-2960issn
1520-4995journal_volume
46pub_type
杂志文章相关文献
BIOCHEMISTRY文献大全abstract::Vanadium(IV) oxo-bis(maltolato) (BMOV), an organovanadium compound, is a potent insulinomimetic agent and improves glucose homeostasis in various models of diabetes. We have shown previously that BMOV stimulates the phosphorylation of PKB which may contribute as one of the mechanisms for the insulinomimetic effect of ...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi060403x
更新日期:2006-09-26 00:00:00
abstract::Specific intra- and intermolecular quadruplex conformations of model G-DNA oligonucleotides have been identified from their translational and rotational diffusion coefficients in aqueous solution. The transport properties were determined by polarized and depolarized dynamic light scattering. A comparison with hydrodyn...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi990750p
更新日期:1999-09-21 00:00:00
abstract::The complete amino acid sequence of ragweed pollen allergen Ra3 has been determined. The molecule consists of 101 amino acid residues and to date is the only allergen isolated from Ambrosia elatior (short ragweed) which contains carbohydrate. This particular preparation of allergen has a single, unique amino acid sequ...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00566a010
更新日期:1980-12-09 00:00:00
abstract::We have examined the structure of newly repaired regions of chromatin in intact and permeabilized human cells following exposure to bleomycin (BLM). The average repair patch size (in permeabilized cells) was six to nine bases, following doses of 1-25 micrograms/mL BLM, and greater than 80% of the total repair synthesi...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00484a020
更新日期:1990-08-14 00:00:00
abstract::The first committed step of guanine nucleotide biosynthesis is the oxidation of inosine 5'-monophosphate (IMP) to xanthosine 5'-monophosphate (XMP) catalyzed by IMP dehydrogenase. The reaction involves the reduction of NAD(+) with the formation of a covalent enzyme intermediate (E-XMP). Hydrolysis of E-XMP requires th...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi048342v
更新日期:2005-09-06 00:00:00
abstract::Pig liver phosphomevalonate kinase (EC 2.7.4.2) has been purified to homogeneity as shown by polyacrylamide gel electrophoresis. The molecular weight estimates range from 21,000 to 22,500. Each molecule is composed of one polypeptide chain. The presence of SH-containing reagents is essential for the preservation of en...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00552a003
更新日期:1980-05-27 00:00:00
abstract::Oligonucleotide-directed mutagenesis in vivo was used to create destabilizing site specific changes at position 6 in iso-1-cytochrome c in Saccharomyces cerevisiae. These changes were made in combination with the stabilizing N52I substitution. The resulting proteins showed that a variety of forces and interactions are...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00021a023
更新日期:1995-05-30 00:00:00
abstract::When alpha,beta-unsaturated substrates bind to the active site of enoyl-CoA hydratase, large spectral changes can be observed [D'Ordine, R. L., et al. (1994) Biochemistry 33, 12635-12643]. The differences in the isotropic magnetic shieldings of the free and active site-bound forms of the carbonyl, alpha-, and beta-car...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi015845h
更新日期:2002-02-26 00:00:00
abstract::In an effort to characterize the bimolecular interface between parathyroid hormone (PTH) and its human receptor PTH1-Rc (hPTH1-Rc), we previously identified two contact sites in the receptor: one for position 1 and another for position 13 (located at the ends of the principal activation domain) in PTH(1-34). The prese...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi000195n
更新日期:2000-07-18 00:00:00
abstract::We assigned l-talarate dehydratase (TalrD) and galactarate dehydratase (GalrD) functions to a group of orthologous proteins in the mechanistically diverse enolase superfamily, focusing our characterization on the protein encoded by the Salmonella typhimurium LT2 genome (GI:16766982; STM3697). Like the homologous mande...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi7008882
更新日期:2007-08-21 00:00:00
abstract::The relative roles of insulin and glucose in the regulation of hepatic glycogen synthase and phosphorylase were studied in hepatocytes from fed rats. Elevation of extra-cellular glucose led to a rapid decrease in phosphorylase a activity followed by a slower increase in glycogen synthase I activity. A reciprocal and c...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00596a004
更新日期:1978-02-07 00:00:00
abstract::The malarial parasite Plasmodium falciparum can only synthesize pyrimidine nucleotides via the de novo pathway which is therefore a suitable target for development of antimalarial drugs. New assay procedures have been developed using high-pressure liquid chromatography (HPLC) which enable concurrent measurement of pyr...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00183a033
更新日期:1994-05-03 00:00:00
abstract::Mistic is an unusual membrane protein from Bacillus subtilis. It appears to fold and insert autonomously into a lipid bilayer and has been suggested as a tool that aids the targeting of eukaryotic membrane proteins to bacterial membranes. The NMR structure of Mistic in detergent (LDAO) micelles has revealed it to be a...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi0608818
更新日期:2006-08-01 00:00:00
abstract::Sedimentation equilibrium and sedimentation velocity measurements demonstrate that turkey gizzard caldesmon is an elongated molecule of molecular mass 75 +/- 2 kDa. The frictional ratio (2.14) is consistent with a prolate ellipsoid of axial ratio 24, corresponding to an apparent length and width of 516 and 21.5 A, res...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00446a039
更新日期:1989-10-03 00:00:00
abstract::A photoaffinity probe for corticotropin (ACTH) receptors was prepared by selective modification of the single tryptophan residue in ACTH. A new photoreactive agent, 2,4-dinitro-5-azidophenylsulfenyl chloride, was synthesized and used for introducing the photoreactive group into ACTH. 2,4-Dinitro-5-azidophenylsulfenyl-...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00555a027
更新日期:1980-07-08 00:00:00
abstract::Protein kinase C (PKC) interacted with phospholipid vesicles in a calcium-dependent manner and produced two forms of membrane-associated PKC: a reversibly bound form and a membrane-inserted form. The two forms of PKC were isolated and compared with respect to enzyme stability, cofactor requirements, and phorbol ester ...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00420a003
更新日期:1988-10-04 00:00:00
abstract::The refined crystallographic structure of the "closed" conformation of chicken mitochondrial aspartate aminotransferase has been used as a template for the construction of models of the two Escherichia coli aminotransferases encoded by the tyrB and aspC genes. The main results are as follows: (1) Only minor changes ar...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00422a009
更新日期:1988-11-01 00:00:00
abstract::Thiocyanate reacts noncatalytically with myeloperoxidase-derived HOCl to produce hypothiocyanite (OSCN(-)), thereby potentially limiting the propensity of HOCl to inflict host tissue damage that can lead to inflammatory diseases. However, the efficiency with which SCN(-) captures HOCl in vivo depends on the concentrat...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi902089w
更新日期:2010-03-09 00:00:00
abstract::Heat shock protein 90 (Hsp90) is a highly conserved ATP-driven machine involved in client protein maturation, folding, and activation. The chaperone is supported by a set of cochaperones that confer client specificities. One of those proteins is the suppressor of G2 allele of skp1 (Sgt1), which participates together w...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi5000542
更新日期:2014-04-22 00:00:00
abstract::When the identity of the metal ion activator, M, is changed within the series, Zn2+, Co2+, Mg2+, Ni2+, Mn2+, and Cd2+, the equilibrium distribution among the central complexes in the phosphoglucomutase system is markedly altered. (The central complexes are Ep-M-Glc-6-P, ED-M-Glc-1,6-P2, and Ep-M-Glc-1-P, where Ep and ...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00663a016
更新日期:1976-09-07 00:00:00
abstract::The gene encoding enzyme IIA(glc) (EIIA) of the phosphoenolpyruvate:sugar phosphotransferase system of Mycoplasma capricolum was cloned into a regulated expression vector. The purified protein product of the overexpressed gene was characterized as an active phosphoacceptor from HPr with a higher pI than previously des...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi963090m
更新日期:1997-06-10 00:00:00
abstract::We have assayed the cross-linking of oligonucleotides containing repeated mitomycin-reactive CpG sites in order to assess the factors that enhance activation of the carbamoyl function at C10, yielding efficient mitomycin cross-linking. Drugs studied include mitomycin C (MC), N-methylmitomycin A (NMA), and the aziridin...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00439a049
更新日期:1989-06-27 00:00:00
abstract::Evidence for the NADH-modulated formation of a complex between alpha-glycerol-3-phosphate dehydrogenase and l-lactate dehydrogenase was reported [Yong, H., Thomas, G. A., and Peticolas, W. L. (1993) Biochemistry 32, 11124-11131]. This NADH-modulated association suggested a mechanism of potentially great importance to ...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi027244b
更新日期:2003-05-27 00:00:00
abstract::Colchicine induces a weak assembly-independent GTPase activity in calf brain tubulin [David-Pfeuty, T., Erickson, H. P., & Pantaloni, D. (1977) Proc. Natl. Acad. Sci. U.S.A. 74, 5372-5376; Andreu, J. M., & Timasheff, S. N. (1981) Arch. Biochem. Biophys. 211, 151-157]. Kinetic analysis shows a turnover number of 2 x 10...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00186a027
更新日期:1994-05-24 00:00:00
abstract::We report the use of anti-nucleoside antibodies to probe for local denaturation of calf thymus DNA upon binding of the antitumor drug cis-diamminedichloroplatinum(II), cis-DDP, and the biologically inactive analogues trans-diamminedichloroplatinum(II), trans-DDP, and chloro(diethylenetriamine)platinum(II) chloride, [P...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00355a008
更新日期:1986-04-08 00:00:00
abstract::The time-resolved fluorescence decay of plant PSI-LHCI has been analyzed and compared with its component parts, the PSI core and the peripheral antenna LHCI, in an attempt to (i) define the physical domains associated with the multicomponent decay-associated spectra (DAS) and determine the origin of the kinetically sl...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi060243p
更新日期:2006-06-06 00:00:00
abstract::The egg jelly that encapsulates amphibian eggs is essential for fertilization, but its molecular composition and roles remain largely unknown. We identified a calcium-dependent lectin from the pentraxin superfamily in the egg jelly coat from the South American burrowing frog, Lepidobatrachus laevis. This lectin, jeltr...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi035314o
更新日期:2003-11-11 00:00:00
abstract::We have validated that ligand peptides designed from antigen peptides could be used for targeting specific major histocompatibility complex class I (MHC-I) molecules on the cell surface. To design the ligand peptides, we used reported antigen peptides for each MHC-I molecule with high binding affinity. From the crysta...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/acs.biochem.0c00735
更新日期:2020-12-15 00:00:00
abstract::A panel of six naïve 14-residue random peptide libraries displayed polyvalently on M13 phage was pooled and sorted against human leukemia inhibitory factor (LIF). After four rounds of selection, a single large family of peptides with the consensus sequence XCXXXXG(A/S)(D/E)(W/F)WXCF was found to bind specifically to L...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi035303v
更新日期:2003-11-18 00:00:00
abstract::P-450(15)alpha is a form of cytochrome P-450 purified from liver microsomes of female 129/J mice that is specific for oxidation of testosterone to its 15 alpha-hydroxylated product. Testosterone 15 alpha-hydroxylase activity that was inhibited by anti-P-450(15)alpha antibody was approximately 50 times higher in renal ...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00365a028
更新日期:1986-08-26 00:00:00