Abstract:
:The isolated H(+)-ATPase from Escherichia coli (EF(0)F(1)) was investigated by electron microscopy of samples of negatively stained monodisperse molecules, followed by single-particle image processing. The resulting three-dimensional maps showed that the F(1)-part is connected by a prominent stalk to a more peripheral part of F(0). The F(1)-part showed stain-accessible cavities inside. In three-dimensional maps from selected particles, a second stalk could be detected which was thinner than the main stalk and is thought to correspond to the stator.Three-dimensional maps of the enzyme in the absence and in the presence of the substrate analogue adenyl-beta, gamma-imidodiphosphate (AMP-PNP) were calculated. Upon binding of AMP-PNP the three-dimensional maps showed no significant changes in the F(0)-part of EF(0)F(1), whereas a major conformational change in the F(1)-part was observed. (1) The diameter of the F(1)-part decreased upon binding of AMP-PNP mainly in the upper half of F(1). (2) Enzyme particles prepared in the presence of AMP-PNP had a pointed cap at the top of the F(1)-part which was missing in its absence. (3) The stain-accessible cavity inside the F(1)-part altered its pattern significantly.
journal_name
J Mol Bioljournal_title
Journal of molecular biologyauthors
Böttcher B,Bertsche I,Reuter R,Gräber Pdoi
10.1006/jmbi.1999.3435keywords:
subject
Has Abstractpub_date
2000-02-18 00:00:00pages
449-57issue
2eissn
0022-2836issn
1089-8638pii
S0022-2836(99)93435-6journal_volume
296pub_type
杂志文章abstract::Retinoic-acid mediated differentiation of F9 cells is accompanied by an increased transcription of the histone H1zero gene. This increase is an early response after addition of retinoic acid, suggesting a direct effect of the hormone on transcription of the gene. We show now that the promoter of histone H1zero contain...
journal_title:Journal of molecular biology
pub_type: 杂志文章
doi:10.1006/jmbi.1994.1555
更新日期:1994-09-09 00:00:00
abstract::We have determined the three-dimensional structure of 6, 7-dimethyl-8-ribityllumazine synthase (lumazine synthase) from Brucella abortus, the infectious organism of the disease brucellosis in animals. This enzyme catalyses the formation of 6, 7-dimethyl-8-ribityllumazine, the penultimate product in the synthesis of ri...
journal_title:Journal of molecular biology
pub_type: 杂志文章
doi:10.1006/jmbi.2000.3640
更新日期:2000-04-14 00:00:00
abstract::The high resolution structures of bovine pancreatic trypsin inhibitor refined in two distinct crystal forms have been compared. One of the structures was a result of new least-squares X-ray refinement of data from crystal form I, while the other was the joint X-ray/neutron structure of crystal form II. After superposi...
journal_title:Journal of molecular biology
pub_type: 杂志文章
doi:10.1016/0022-2836(87)90633-4
更新日期:1987-01-05 00:00:00
abstract::Rifampicin resistant (Rifr mutations map in the rpoB gene encoding the beta subunit of Escherichia coli RNA polymerase. We have used our collection of 17 sequenced Rifr mutations to investigate the involvement of E. coli RNA polymerase in the antitermination systems enhancing expression of delayed early lambda genes o...
journal_title:Journal of molecular biology
pub_type: 杂志文章
doi:10.1016/0022-2836(88)90573-6
更新日期:1988-11-20 00:00:00
abstract::The nucleotide sequence of the 3D (polymerase) gene of eight epidemiologically related isolates of foot-and-mouth disease virus of serotype C1 is reported. The genetic heterogeneity of 3D RNA is compared with that of the VP1-coding RNA of the same viruses. Regression lines of substitutions per nucleotide that distingu...
journal_title:Journal of molecular biology
pub_type: 杂志文章
doi:10.1016/0022-2836(88)90367-1
更新日期:1988-12-05 00:00:00
abstract::Molecular dynamics simulations on bacteriorhodopsin were performed starting from the model structure described by Henderson et al. The simulations were gradually improved by first treating a monomer in vacuum and then adding further monomers, lipids, and water to finally simulate a unit cell of the hexagonal lattice o...
journal_title:Journal of molecular biology
pub_type: 杂志文章
doi:10.1006/jmbi.1995.0361
更新日期:1995-06-30 00:00:00
abstract::Cloning and sequencing of cDNA segments of human TOP2 gene encoding the 170 kDa form of human DNA topoisomerase II show that Arg486 of the enzyme has been mutated to a lysine in the enzyme from two human leukemia cell lines HL-60/AMSA and KBM-3/AMSA, which were independently selected for resistance to the antitumor dr...
journal_title:Journal of molecular biology
pub_type: 杂志文章
doi:10.1016/0022-2836(92)90245-f
更新日期:1992-02-20 00:00:00
abstract::We have analysed antigen-contacting residues and combining site shape in the antibody Fv and Fab crystal structures now available from the Protein Data Bank. Antigen-contacting propensities are presented for each antibody residue, allowing a new definition for the complementarity determining regions (CDRs) to be propo...
journal_title:Journal of molecular biology
pub_type: 杂志文章
doi:10.1006/jmbi.1996.0548
更新日期:1996-10-11 00:00:00
abstract::High mobility group (HMG) proteins are nuclear proteins believed to significantly affect DNA interactions by altering nucleic acid flexibility. Group B (HMGB) proteins contain HMG box domains known to bind to the DNA minor groove without sequence specificity, slightly intercalating base pairs and inducing a strong ben...
journal_title:Journal of molecular biology
pub_type: 杂志文章
doi:10.1016/j.jmb.2007.09.073
更新日期:2007-12-07 00:00:00
abstract::A protein microarray system containing different dilutions of 77 related and non-related proteins was used to show that IgE from subjects allergic to Brazil nut specifically recognise the seed 2S albumin protein (Ber e 1). Further, correctly folded chimaeric 2S albumin proteins containing structural epitope replacemen...
journal_title:Journal of molecular biology
pub_type: 杂志文章
doi:10.1016/j.jmb.2004.08.065
更新日期:2004-10-22 00:00:00
abstract::The reverse transcriptase (RT) of HIV-1 and feline immunodeficiency virus (FIV) consist of two subunits of 51 kDa (p51) and 66 kDa (p66). In order to elucidate the role of p51 in the heterodimer, chimeric HIV-1/FIV RT heterodimers were constructed and characterized. The FIV RT p51/HIV-1 RT p66 chimera showed a 2.5-fol...
journal_title:Journal of molecular biology
pub_type: 杂志文章
doi:10.1006/jmbi.1998.1739
更新日期:1998-05-15 00:00:00
abstract::The decrease in conformational stability, delta(delta G), has been measured for 72 aliphatic side-chain mutants from four proteins in which a larger side-chain is replaced by a smaller side-chain so that steric effects are minimal. When these delta(delta G) values are corrected to the same accessibility, namely 100% b...
journal_title:Journal of molecular biology
pub_type: 杂志文章
doi:10.1016/0022-2836(92)90121-y
更新日期:1992-07-05 00:00:00
abstract::A method that relates molecular structure to the forces that maintain it and to its X-ray diffraction pattern is described and applied to muscle. In a computer model, the potential energy of the movable components (here the myosin heads) is minimized by letting them move down the steepest gradient in three dimensions ...
journal_title:Journal of molecular biology
pub_type: 杂志文章
doi:10.1016/0022-2836(84)90376-0
更新日期:1984-03-25 00:00:00
abstract::A mutant of bovine pancreatic trypsin inhibitor (BPTI) has been constructed and expressed in Escherichia coli in order to probe the kinetic and structural consequences of truncating the binding loop residues to alanine. In addition to two such mutations (Thr11Ala and Pro13Ala), it has a conservative Lys15Arg substitut...
journal_title:Journal of molecular biology
pub_type: 杂志文章
doi:10.1006/jmbi.1999.3445
更新日期:2000-02-04 00:00:00
abstract::Dihydrolipoyl transacetylase (E2p) is both structurally and functionally the central enzyme of the pyruvate dehydrogenase multienzyme complex. The crystal structure of the catalytic domain, i.e. residues 382 to 637, of Azotobacter vinelandii E2p (E2pCD) was solved by multiple isomorphous replacement and refined by ene...
journal_title:Journal of molecular biology
pub_type: 杂志文章
doi:10.1006/jmbi.1993.1235
更新日期:1993-04-20 00:00:00
abstract::The type A domain of the von Willebrand Factor is found also in the complement proteins factor B (FB), C2, CR3 and CR4, the integrins, collagen types VI, VII, XII and XIV, and other proteins. FB is a component of the alternative pathway of the complement system of immune defence, and is cleaved into the fragments Bb a...
journal_title:Journal of molecular biology
pub_type: 杂志文章
doi:10.1006/jmbi.1994.1271
更新日期:1994-04-22 00:00:00
abstract::Sickle hemoglobin polymerization exhibits a striking sensitivity to initial concentration, with characteristic reaction times that exhibit 30th power dependence on concentration. This extraordinary reaction order is encompassed by a novel double nucleation mechanism that predicts 50th power dependence of the homogeneo...
journal_title:Journal of molecular biology
pub_type: 杂志文章
doi:10.1006/jmbi.1996.0079
更新日期:1996-02-23 00:00:00
abstract::In Saccharomyces cerevisiae, signal transduction through pathways governing mating, osmoregulation, and nitrogen starvation depends upon a direct interaction between the sterile alpha motif (SAM) domains of the Ste11 mitogen-activated protein kinase kinase kinase (MAPKKK) and its regulator Ste50. Previously, we solved...
journal_title:Journal of molecular biology
pub_type: 杂志文章
doi:10.1016/j.jmb.2005.11.012
更新日期:2006-02-10 00:00:00
abstract::The Bacillus subtilis chemoreceptor McpB is a dimer of identical subunits containing two transmembrane (TM) segments (TM1, residues 17-34: TM2, residues 280-302) in each monomer with a 2-fold axis of symmetry. To study the organization of the TM domains, the wild-type receptor was mutated systematically at the membran...
journal_title:Journal of molecular biology
pub_type: 杂志文章
doi:10.1016/s0022-2836(03)00834-9
更新日期:2003-08-22 00:00:00
abstract::The substrate-binding H-site of human glutathione transferase (GST) M2-2 was subjected to iterative saturation mutagenesis in order to obtain an efficient enzyme with the novel epoxide substrate indene 1,2-oxide. Residues 10, 116, and 210 were targeted, and the activities with the alternative substrates, benzyl isothi...
journal_title:Journal of molecular biology
pub_type: 杂志文章
doi:10.1016/j.jmb.2011.07.039
更新日期:2011-09-09 00:00:00
abstract::The movement of the bacterial insertion sequence IS1 often generates cointegrate structures in which donor and target replicons are connected by direct repeats of IS1. The experiments reported here were designed to understand how IS1 transposition is controlled. Our physical characterization of the structures of coint...
journal_title:Journal of molecular biology
pub_type: 杂志文章
doi:10.1016/0022-2836(84)90337-1
更新日期:1984-04-05 00:00:00
abstract::The algebra of target theory for damage by radiation was laid out by Atwood and Norman in 1949. Their equations provide a widely embraced framework for distinguishing single-hit and multi-hit mechanisms of damage. The present work asks whether in vitro damage to DNA duplexes by different agents affects amplification b...
journal_title:Journal of molecular biology
pub_type: 杂志文章
doi:10.1016/j.jmb.2009.07.012
更新日期:2009-09-18 00:00:00
abstract::We report on the preparation, crystallization and preliminary X-ray crystallographic study of the Fab fragments from a murine monoclonal anti-cardiotoxin antibody M gamma 2-3 directed against a cobra cardiotoxin. The Fab fragment has been crystallized from polyethylene glycol 8000 solutions in a form suitable for high...
journal_title:Journal of molecular biology
pub_type: 杂志文章
doi:10.1016/0022-2836(86)90503-6
更新日期:1986-06-20 00:00:00
abstract::Bacterial microcompartments (BMCs) sequester enzymes from the cytoplasmic environment by encapsulation inside a selectively permeable protein shell. Bioinformatic analyses indicate that many bacteria encode BMC clusters of unknown function and with diverse combinations of shell proteins. The genome of the halophilic m...
journal_title:Journal of molecular biology
pub_type: 杂志文章
doi:10.1016/j.jmb.2014.02.025
更新日期:2014-05-29 00:00:00
abstract::Recombinant expression systems differ in the type of glycosylation they impart on expressed antigens such as the human immunodeficiency virus type 1 (HIV-1) envelope glycoproteins, potentially affecting their biological properties. We performed head-to-head antigenic, immunogenic and molecular profiling of two distant...
journal_title:Journal of molecular biology
pub_type: 杂志文章
doi:10.1016/j.jmb.2010.08.033
更新日期:2010-10-15 00:00:00
abstract::Dipicolinic acid (DPA) is a small polar molecule that accumulates to high concentrations in bacterial endospores, and is thought to play a role in spore heat resistance, or the maintenance of heat resistance. Previous work has shown that mutations in the spoVF locus of Bacillus subtilis prevent the formation of DPA, a...
journal_title:Journal of molecular biology
pub_type: 杂志文章
doi:10.1006/jmbi.1993.1403
更新日期:1993-07-20 00:00:00
abstract::The small (40 S) subunit of the eukaryotic ribosome may have to scan more than 2000 nucleotides (>600 nm) from its 5'cap recruiting point on an mRNA molecule before initiating on a translation start codon. As with many other processes in living cells, including transcription, editing, mRNA splicing, pre-rRNA processin...
journal_title:Journal of molecular biology
pub_type: 杂志文章
doi:10.1016/j.jmb.2006.06.016
更新日期:2006-08-11 00:00:00
abstract::Factor B is a key component of the alternative pathway of complement and is cleaved by factor D into the Ba and Bb fragments when complexed with the activated form of C3, namely C3b. The Bb fragment contains a von Willebrand factor type A (vWF-A) domain, which is composed of an open twisted almost-parallel beta-sheet ...
journal_title:Journal of molecular biology
pub_type: 杂志文章
doi:10.1006/jmbi.2000.3632
更新日期:2000-04-21 00:00:00
abstract::Influenza viral entry into the host cell cytoplasm is accomplished by a process of membrane fusion mediated by the viral hemagglutinin protein. Hemagglutinin acts in a pH-triggered fashion, inserting a short fusion peptide into the host membrane followed by refolding of a coiled-coil structure to draw the viral envelo...
journal_title:Journal of molecular biology
pub_type: 杂志文章
doi:10.1016/j.jmb.2018.01.006
更新日期:2018-03-02 00:00:00
abstract::The mammalian Sec61 complex forms a protein translocation channel whose function depends upon its interaction with the ribosome and with membrane proteins of the endoplasmic reticulum (ER). To study these interactions, we determined structures of "native" ribosome-channel complexes derived from ER membranes. We find t...
journal_title:Journal of molecular biology
pub_type: 杂志文章
doi:10.1016/j.jmb.2005.02.053
更新日期:2005-04-29 00:00:00