Abstract:
:X-ray quality single crystals of an extracellular esterase from pathogenic Streptomyces scabies were obtained by the hanging drop method. The crystals are monoclinic (space group C2, a = 161.1 A, b = 51.2 A, c = 124.2 A, beta = 100.6 degrees) with two molecules related by a noncrystallographic dyad in the asymmetric unit, with a solvent content of approximately 64%. The diffraction pattern from fresh crystals extends beyond 2 A resolution using sealed tube CuK alpha radiation. The study has been initiated in order to elucidate the mechanism of this unusual non-serine-dependent esterase, and to gain better understanding of the molecular basis of the pathogenesis of the scab disease.
journal_name
J Mol Bioljournal_title
Journal of molecular biologyauthors
Green R,Schottel JL,Swenson L,Wei Y,Derewenda ZSdoi
10.1016/0022-2836(92)90908-3keywords:
subject
Has Abstractpub_date
1992-09-20 00:00:00pages
569-71issue
2eissn
0022-2836issn
1089-8638pii
0022-2836(92)90908-3journal_volume
227pub_type
杂志文章abstract::The structure of Mycobacterium tuberculosis dUTP nucleotidohydrolase (dUTPase) has been determined at 1.3 Angstrom resolution in complex with magnesium ion and the non-hydrolyzable substrate analog, alpha,beta-imido dUTP. dUTPase is an enzyme essential for depleting potentially toxic concentrations of dUTP in the cell...
journal_title:Journal of molecular biology
pub_type: 杂志文章
doi:10.1016/j.jmb.2004.06.028
更新日期:2004-08-06 00:00:00
abstract::Transcription initiation by the enhancer-dependent sigma(54) RNA polymerase holoenzyme is positively regulated after promoter binding. The promoter DNA melting process is subject to activation by an enhancer-bound activator protein with nucleoside triphosphate hydrolysis activity. Tethered iron chelate probes attached...
journal_title:Journal of molecular biology
pub_type: 杂志文章
doi:10.1006/jmbi.2000.4393
更新日期:2001-03-02 00:00:00
abstract::Genetic studies in Saccharomyces cerevisiae predict that the mismatch repair (MMR) factor MSH2-MSH3 binds and stabilizes branched recombination intermediates that form during single strand annealing and gene conversion. To test this model, we constructed a series of DNA substrates that are predicted to form during the...
journal_title:Journal of molecular biology
pub_type: 杂志文章
doi:10.1016/j.jmb.2006.05.032
更新日期:2006-07-14 00:00:00
abstract::Crystals of the apo form of the vitamin B12 and colicin receptor, BtuB, that diffract to 1.95 A have been grown by the membrane-based in meso technique. The structure of the protein differs in several details from that of its counterpart grown by the more traditional, detergent-based (in surfo) method. Some of these d...
journal_title:Journal of molecular biology
pub_type: 杂志文章
doi:10.1016/j.jmb.2006.09.022
更新日期:2006-12-08 00:00:00
abstract::The formation of two-dimensional crystals of the membrane-bound enzyme microsomal glutathione transferase is sensitive to fractional changes in the lipid-to-protein ratio. Variation of this parameter results in crystal polymorphism. The projection structure of a p6 crystal form of the enzyme has been determined by the...
journal_title:Journal of molecular biology
pub_type: 杂志文章
doi:10.1006/jmbi.1999.2683
更新日期:1999-04-30 00:00:00
abstract::The effect of protein-mediated DNA looping on local DNA conformation during active transcription was studied using the lac repressor-operator system. Our results suggest that lac repressor-mediated DNA looping within a plasmid DNA molecule containing two lac repressor binding sequences in vivo effectively separates pl...
journal_title:Journal of molecular biology
pub_type: 杂志文章
doi:10.1016/0022-2836(91)90658-s
更新日期:1991-06-20 00:00:00
abstract::Prions are composed largely, if not entirely, of the scrapie isoform of the prion protein (PrPSc). Conversion of the cellular isoform (PrPC) to PrPSc is accompanied by a diminution in the alpha-helical content and an increase in the beta-sheet structure. To investigate the structural basis of this transition, peptide ...
journal_title:Journal of molecular biology
pub_type: 杂志文章
doi:10.1006/jmbi.1995.0395
更新日期:1995-07-21 00:00:00
abstract::Cre recombinase uses two pairs of sequential cleavage and religation reactions to exchange homologous DNA strands between 34 base-pair (bp) LoxP recognition sequences. In the oligomeric recombination complex, a switch between "cleaving" and "non-cleaving" subunit conformations regulates the number, order, and regio-sp...
journal_title:Journal of molecular biology
pub_type: 杂志文章
doi:10.1016/S0022-2836(02)00246-2
更新日期:2002-05-24 00:00:00
abstract::Peptides that bind to major histocompatibility complex products (MHC) are known to exhibit certain sequence motifs which, though common, are neither necessary nor sufficient for binding: MHCs bind certain peptides that do not have the characteristic motifs and only about 30% of the peptides having the required motif, ...
journal_title:Journal of molecular biology
pub_type: 杂志文章
doi:10.1006/jmbi.1997.0937
更新日期:1997-04-18 00:00:00
abstract::Stochastic fluctuations, termed "noise," in the level of biological molecules can greatly impact cellular functions. While biological noise can sometimes be detrimental, recent studies have provided an increasing number of examples in which biological noise can be functionally beneficial. Rather than provide an exhaus...
journal_title:Journal of molecular biology
pub_type: 杂志文章,评审
doi:10.1016/j.jmb.2017.03.007
更新日期:2017-04-21 00:00:00
abstract::A transcriptionally active sub-set of the dispersed mouse VL30 family of proviral genetic elements was shown to be highly transmissible as a murine leukaemia virus pseudotype. Newly acquired VL30 proviruses (present at 1 to 2 copies per cell) were shown to be transcriptionally active. These data substantiate the hypot...
journal_title:Journal of molecular biology
pub_type: 杂志文章
doi:10.1016/0022-2836(86)90485-7
更新日期:1986-03-05 00:00:00
abstract::Current clinical anti-CD40 biologic agents include both antagonist molecules for the treatment of autoimmune diseases and agonist molecules for immuno-oncology, yet the relationship between CD40 epitope and these opposing biological outcomes is not well defined. This report describes the identification of potent antag...
journal_title:Journal of molecular biology
pub_type: 杂志文章
doi:10.1016/j.jmb.2016.05.014
更新日期:2016-07-17 00:00:00
abstract::The biogenesis of the bacterial flagellum and chemotaxis apparatus in both Escherichia coli and Caulobacter crescentus requires the ordered expression of over 40 genes whose expression is controlled by a trans-acting regulatory hierarchy. In C. crescentus, additional control mechanisms ensure that the transcription of...
journal_title:Journal of molecular biology
pub_type: 杂志文章
doi:10.1016/0022-2836(89)90365-3
更新日期:1989-01-05 00:00:00
abstract::Cdc25B is a dual specificity phosphatase involved in the control of cyclin-dependent kinases and the progression of cells through the cell cycle. A series of minimal domain Cdc25B constructs maintaining catalytic activity have been expressed. The structure of a minimum domain construct binding sulfate was determined a...
journal_title:Journal of molecular biology
pub_type: 杂志文章
doi:10.1006/jmbi.1999.3168
更新日期:1999-10-29 00:00:00
abstract::The outer membrane usher protein Caf1A of the plague pathogen Yersinia pestis is responsible for the assembly of a major surface antigen, the F1 capsule. The F1 capsule is mainly formed by thin linear polymers of Caf1 (capsular antigen fraction 1) protein subunits. The Caf1A usher promotes polymerization of subunits a...
journal_title:Journal of molecular biology
pub_type: 杂志文章
doi:10.1016/j.jmb.2010.08.034
更新日期:2010-10-22 00:00:00
abstract::Group II introns frequently require assistance by specific factors, maturases, for folding and effective splicing in vivo. The only putative maturase of higher plant chloroplasts is encoded by matK, located in the intron of trnK. We show that in barley matK transcripts are modified at a first codon base by C-to-U RNA ...
journal_title:Journal of molecular biology
pub_type: 杂志文章
doi:10.1006/jmbi.1997.1115
更新日期:1997-07-11 00:00:00
abstract::The enzyme encoded by the bgIA gene of Bacillus polymyxa, a type I beta-glucosidase belonging to family I of glycosyl hydrolases, has been purified to homogeneity from an Escherichia coli culture which overexpressed the gene, and crystallized. The crystals, which diffract to 3.0 A resolution, belong to the orthorhombi...
journal_title:Journal of molecular biology
pub_type: 杂志文章
doi:10.1006/jmbi.1994.1441
更新日期:1994-07-15 00:00:00
abstract::The group I intron from Tetrahymena thermophila is able to catalyze its own excision from a precursor RNA. The intron recognizes the splice sites through an intron-encoded sequence called the internal guide sequence, or IGS. The 5' and 3' exons are thought to align on the IGS and form a pseudoknot structure consisting...
journal_title:Journal of molecular biology
pub_type: 杂志文章
doi:10.1006/jmbi.1993.1541
更新日期:1993-10-20 00:00:00
abstract::The G.U wobble base-pair in the acceptor helix of Escherichia coli tRNAAlais critical for aminoacylation by the alanine synthetase. Previous work by several groups probed the mechanism of enzyme recognition of G.U by a structure-function analysis of mutant tRNAs using either a cell assay (amber suppressor tRNA) or a t...
journal_title:Journal of molecular biology
pub_type: 杂志文章
doi:10.1006/jmbi.1999.2884
更新日期:1999-07-09 00:00:00
abstract::The folding pattern of the alpha-crystallin domain, a conserved protein module encoding the molecular determinants of structure and function in the small heat-shock protein superfamily, was determined in the context of the lens protein alphaA-crystallin by systematic application of site-directed spin labeling. The seq...
journal_title:Journal of molecular biology
pub_type: 杂志文章
doi:10.1006/jmbi.1999.3242
更新日期:1999-11-26 00:00:00
abstract::The bcl-2 gene encodes a 26kDa protein which functions as a central regulator of apoptosis. Here we investigated the pathway of Bcl-2alpha into the mitochondrial outer membrane using the yeast Saccharomyces cerevisiae as a model organism. We found that interactions of Bcl-2alpha with the mitochondrial import receptor ...
journal_title:Journal of molecular biology
pub_type: 杂志文章
doi:10.1016/s0022-2836(02)00995-6
更新日期:2002-11-01 00:00:00
abstract::The impenetrability of the blood-brain barrier (BBB) to most conventional drugs impedes the treatment of central nervous system (CNS) disorders. Interventions for diseases like brain cancer, neurodegeneration, or age-associated inflammatory processes require varied approaches to CNS drug delivery. Cystine-dense peptid...
journal_title:Journal of molecular biology
pub_type: 杂志文章
doi:10.1016/j.jmb.2020.04.002
更新日期:2020-06-26 00:00:00
abstract::Lactoferrin is an iron transport protein. Upon binding iron, the two domains in the N-terminal half of the molecule move together. Previous work has shown that this domain closure involves two hinges. Using the newly refined structure of the open form, the structural mechanism underlying this motion is analyzed here i...
journal_title:Journal of molecular biology
pub_type: 杂志文章
doi:10.1006/jmbi.1993.1592
更新日期:1993-11-20 00:00:00
abstract::The human pathogen Staphylococcus aureus is a gram-positive bacterium that causes difficult-to-treat infections. One of the reasons why S. aureus is such as successful pathogen is due to the cell-to-cell physiological variability that exists within microbial communities. Many laboratories around the world study the ge...
journal_title:Journal of molecular biology
pub_type: 杂志文章,评审
doi:10.1016/j.jmb.2019.06.011
更新日期:2019-11-22 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::Transcription complexes containing Escherichia coli RNA polymerase terminate RNA synthesis in response to intrinsic (rho-independent) terminators encoded in the DNA template. This type of termination involves the formation of a hairpin structure in the nascent RNA, leading to release of the RNA and polymerase from the...
journal_title:Journal of molecular biology
pub_type: 杂志文章
doi:10.1006/jmbi.1994.1702
更新日期:1994-11-18 00:00:00
abstract::Scaffold or matrix-attachment regions (S/MARs) are thought to be involved in the organization of eukaryotic chromosomes and in the regulation of several DNA functions. Their characteristics are conserved between plants and humans, and a variety of biological activities have been associated with them. The identificatio...
journal_title:Journal of molecular biology
pub_type: 杂志文章
doi:10.1016/j.jmb.2005.11.073
更新日期:2006-04-28 00:00:00
abstract::Mammalian hosts interface intimately with commensal and pathogenic bacteria. It is increasingly clear that molecular interactions between the nervous system and microbes contribute to health and disease. Both commensal and pathogenic bacteria are capable of producing molecules that act on neurons and affect essential ...
journal_title:Journal of molecular biology
pub_type: 杂志文章,评审
doi:10.1016/j.jmb.2016.12.023
更新日期:2017-03-10 00:00:00
abstract::We have previously isolated sphericase (Sph), an extracellular mesophilic serine protease produced by Bacillus sphaericus. The Sph amino acid sequence is highly homologous to two cold-adapted subtilisins from Antarctic bacilli S39 and S41 (76% and 74% identity, respectively). Sph is calcium-dependent, 310 amino acid r...
journal_title:Journal of molecular biology
pub_type: 杂志文章
doi:10.1016/j.jmb.2003.07.011
更新日期:2003-10-03 00:00:00
abstract::The evolution of new or improved enzyme specificities in prokaryotes has been proposed to involve gene duplication, followed by silencing of one of the duplicates at the transcriptional or translational level. Such "silent gene intermediates" are distinct from "cryptic" genes, which are proposed to have a different ro...
journal_title:Journal of molecular biology
pub_type: 杂志文章
doi:10.1016/0022-2836(86)90358-x
更新日期:1986-11-20 00:00:00