abstract：:Although the amino acid sequences and the structures of pyruvate kinase (PYK) isozymes are highly conserved, allosteric regulations differ. This suggests that amino acids with low conservation play important roles in the allosteric mechanism. The current work exploits a 'natural screen'- the 122 point mutations identi...

journal_title：IUBMB life

authors： Pendergrass DC,Williams R,Blair JB,Fenton AW

更新日期：2006-01-01 00:00:00

abstract：:Accumulating evidence indicates that there is a critical role of the ubiquitin/proteasome pathway in the regulation of apoptosis. Among the important molecules that couple these two fundamental cellular activities are members of the inhibitor of apoptosis (IAP) protein family. In addition to their well-studied ability...

journal_title：IUBMB life

authors： Ni T,Li W,Zou F

更新日期：2005-12-01 00:00:00

abstract：:The extensive post-transcriptional modification of U2 snRNA is required for spliceosome assembly and pre-mRNA splicing in vertebrates. However, the rare modification of U2 snRNA in yeast implies a different mechanism for regulating spliceosome biogenesis in single-celled eukaryotes. To understand the evolutionary patt...

journal_title：IUBMB life

authors： Huang ZP,Zhou H,Qu LH

更新日期：2005-10-01 00:00:00

abstract：:Modern cell-free in vitro protein synthesis systems present powerful tools for the synthesis of isotope-labeled proteins in high yields. The production of selectively 15 N-labeled proteins from 15 N-labeled amino acids is particularly economic and yields are often sufficient to analyze the proteins very quickly by two...

journal_title：IUBMB life

authors： Ozawa K,Dixon NE,Otting G

更新日期：2005-09-01 00:00:00

abstract：:Transketolase (TK) is a homodimer, the simplest representative of thiamine diphosphate (ThDP)-dependent enzymes. It was first ThDP-dependent enzymes the crystal structure of which has been solved and revealed the general fold for this class of enzymes and the interactions of the non-covalently bound coenzyme ThDP with...

journal_title：IUBMB life

authors： Kochetov G,Sevostyanova IA

更新日期：2005-07-01 00:00:00

abstract：:The last 15 years of effort in understanding bacterial DNA replication and repair has identified that the donut shaped beta2 sliding clamp is harnessed by very functionally different DNA polymerases throughout the lifecycle of the bacterial cell. Remarkably, the sites of binding of these polymerases, in most cases, ap...

journal_title：IUBMB life

authors： Wijffels G,Dalrymple B,Kongsuwan K,Dixon NE

更新日期：2005-06-01 00:00:00

abstract：:Bovine Spongiform Encephalopathy (BSE) is typical of the dementias that affect both animals and man; Scrapie in sheep, Creutzfeldt-Jakob disease in man. Global efforts have been made to determine the nature of the active agents in these diseases. At present the 'protein only hypothesis' of Prusiner holds. It was a sur...

journal_title：IUBMB life

authors： Campbell PN

更新日期：2005-04-01 00:00:00

abstract：:Recently the crystal structure of creatine kinase from Torpedocalifornica was determined to 2.1 A. The dimeric structure revealed two different forms in the unit cell: one monomer was bound to a substrate, MgADP, and the other monomer was bound to a transition-state analogue complex composed of MgADP, nitrate and crea...

journal_title：IUBMB life

authors： Wang PF,Flynn AJ,McLeish MJ,Kenyon GL

更新日期：2005-04-01 00:00:00

abstract：:Hydrogen peroxide is a major regulator of plant programmed cell death (PCD) but little is known about the downstream genes from the H(2)O(2)-signaling network that mediate the cell death. To address this question, a novel system for studying H(2)O(2)-induced programmed cell death in Arabidopsis thaliana was used. The ...

journal_title：IUBMB life

authors： Gechev TS,Minkov IN,Hille J

更新日期：2005-03-01 00:00:00

abstract：:The rat organic anion transporter 3 (rOAT3) has recently been identified as the third isoform of the OAT family. The mechanisms that regulate rOAT3's functions remain to be elucidated. rOAT3 contributes for moving a number of negatively charged organic compounds between cells and their extracellular milieu. Caveolin (...

journal_title：IUBMB life

authors： Kwak JO,Kim HW,Song JH,Kim MJ,Park HS,Hyun DK,Kim DS,Cha SH

更新日期：2005-02-01 00:00:00

abstract：:Transforming growth factorbeta1 (TGFbeta1) is considered to be the principal contributor to liver fibrosis. So in this study the ribozymes against TGFbeta1 were designed. The in vitro cleavage activities of the ribozymes were assayed through incubation of (32)p-labeled target RNAs and (32)p-labeled ribozymes in differ...

journal_title：IUBMB life

authors： Song YH,Zhou XM,Xue XN,Liu NZ,Tian DA,Kong XJ,Wu XL,Lin JS,Jin YX

更新日期：2005-01-01 00:00:00

abstract：:The physiological role of neuroglobin and cytoglobin, two vertebrate globins discovered in the last 5 years, is not yet clearly understood. In this work, we review the structural information on these globins and its implication on the possible protein function, obtained by electron paramagnetic resonance and resonance...

journal_title：IUBMB life

authors： Van Doorslaer S,Vinck E,Trandafir F,Ioanitescu I,Dewilde S,Moens L

更新日期：2004-11-01 00:00:00

abstract：:Large inter-individual variation exists in the response to vitamin E supplementation, and this may influence the outcome of human studies. It is our hypothesis that genetic heterogeneity is an important determinant of vitamin E homeostasis. Therefore we have performed an in silico search for single nucleotide polymorp...

journal_title：IUBMB life

authors： Döring F,Rimbach G,Lodge JK

更新日期：2004-10-01 00:00:00

abstract：:Cyclic AMP metabolism is essential for the survival of the social amoebae Dictyostelium discoideum. Three distinct adenylyl cyclases are expressed and required for the normal development of this simple eukaryote. The adenylyl cyclase expressed during aggregation, ACA, is related to the mammalian and Drosophila G prote...

journal_title：IUBMB life

authors： Kriebel PW,Parent CA

更新日期：2004-09-01 00:00:00

abstract：:The activation and incorporation of selenium into selenocysteine containing selenoproteins has been well established in an Escherichia coli model system but there is little specific information concerning the transport and intracellular trafficking of selenium in biological systems in general. A selenium transport rol...

journal_title：IUBMB life

authors： Self WT,Pierce R,Stadtman TC

更新日期：2004-08-01 00:00:00

abstract：:Selenium is an essential component of several enzymes and proteins in a number of methane-producing archae. Information concerning accessory proteins that function in selenium transport processes, however, is limited. A novel selenium-binding protein with a potential transport role and a selenocysteine lyase that serv...

journal_title：IUBMB life

authors： Stadtman T

更新日期：2004-07-01 00:00:00

abstract：:Availability of the human genome data has enabled the exploration of a huge amount of biological information encoded in it. There are extensive ongoing experimental efforts to understand the biological functions of the gene products encoded in the human genome. However, computational analysis can aid immensely in the ...

journal_title：IUBMB life

authors： Pandit SB,Balaji S,Srinivasan N

更新日期：2004-06-01 00:00:00

abstract：:Treatment of microsomes (preferably enriched with endoplasmic reticulum) isolated from bovine pulmonary artery smooth muscle tissue with the O2*- -generating system (hypoxanthine (HPX) plus xanthine oxidase (XO)), markedly stimulated matrix metalloproteinase-2 (MMP-2) activity and also enhanced Ca2+ ATPase activity an...

journal_title：IUBMB life

authors： Mandal A,Chakraborti T,Das S,Ghosh B,Ghosh A,Chakraborti S

更新日期：2004-05-01 00:00:00

abstract：:The purpose of this study was to confirm protein-protein interaction between cyclooxygenase-1 (COX-1) and caveolins. The interaction of cyclooxygenase-1 and caveolins in the cultured human embryonic kidney (HEK 293) cells was investigated using immuno-precipitation and Western blot analysis. In HEK 293 cells, high lev...

journal_title：IUBMB life

authors： Cha SH,Jung NH,Kim BR,Kim HW,Kwak JO

更新日期：2004-04-01 00:00:00

abstract：:Mutations in the breast cancer susceptibility gene BRCA1 predispose individuals to breast and ovarian cancers. Cofactor of BRCA1 (COBRA1), a novel protein, was isolated as a BRCA1-interacting protein. However, the role of COBRA1 in breast cancer is poorly understood. In this study, we demonstrate that COBRA1 mRNA was ...

journal_title：IUBMB life

authors： Zhu J,Song S,Jiang Z,Yan J,Lu Q,Huang C,Ye Q

更新日期：2004-03-01 00:00:00

abstract：:Cancers have a clonal origin, yet their chromosomes and genes are non-clonal or heterogeneous due to an inherent genomic instability. However, the cause of this genomic instability is still debated. One theory postulates that mutations in genes that are involved in DNA repair and in chromosome segregation are the prim...

journal_title：IUBMB life

authors： Duesberg P,Fabarius A,Hehlmann R

更新日期：2004-02-01 00:00:00

abstract：:How should a protein be designed to serve in processes as diverse as chromosome condensation, sister chromatid cohesion, DNA recombination, gene dosage regulation, and perhaps even gene silencing or transcriptional regulation--which occur in both mitosis and meiosis? Such a protein or protein complex needs to bear DNA...

journal_title：IUBMB life

authors： Jessberger R

更新日期：2003-12-01 00:00:00

abstract：:Peroxynitrite is an inorganic toxin of physiological interest, formed from the diffusion-controlled reaction of superoxide and nitrogen monoxide with a rate constant of (1.6 +/- 0.3) x 10(10) M(-1) s(-1). On the basis of three experiments we conclude that homolysis of the O-O bond in peroxynitrous acid is unlikely: (1...

journal_title：IUBMB life

authors： Kissner R,Nauser T,Kurz C,Koppenol WH

更新日期：2003-10-01 00:00:00

abstract：:Reactive oxygen and nitrogen species (ROS and RNS) have been extensively recognized as important signaling molecules implicated in physiological processes such as gene expression, cell differentiation and immune activation. Nevertheless, continuous production of these species may produce oxidative and/or nitrosative s...

journal_title：IUBMB life

authors： Rotilio G,Aquilano K,Ciriolo MR

更新日期：2003-10-01 00:00:00

abstract：:From a liver cDNA library prepared from a nonvenomous striated snake, Elaphe quadrivirgata, we isolated a cDNA encoding a novel protein, PLIalpha-like protein (PLIalpha-LP), having approximately 70% sequence identities with the alpha-type phospholipase A2 (PLA2) inhibitors (PLIalpha(s)) previously purified from the ve...

journal_title：IUBMB life

authors： Okumura K,Inoue S,Ikeda K,Hayashi K

更新日期：2003-09-01 00:00:00

abstract：:In many organisms the processes of DNA replication and recombination are closely linked. For instance, in bacterial and eukaryotic systems, replication forks can become stalled or damaged, in many cases leading to the formation of double stranded breaks. Replication restart is an essential mechanism in which the recom...

journal_title：IUBMB life

authors： Wilkinson DE,Weller SK

更新日期：2003-08-01 00:00:00

abstract：:Cocaine is a powerful central nervous stimulant and among the most abused of drugs. Despite decades of efforts, however, no effective pharmacological treatments are available against cocaine addiction or toxic effects. Classical receptor-antagonist therapeutic approaches have not yielded significant effects, although ...

journal_title：IUBMB life

authors： Ascenzi P,Clementi E,Polticelli F

更新日期：2003-07-01 00:00:00

abstract：:Recent successes in identifying the genes and associated proteins underlying several familial neurodegenerative conditions have not always resulted in accounts as to why the associated patterns of neuronal damage are so specific and limited. Here, with reference to Huntington's disease, we present a general scheme to ...

journal_title：IUBMB life

authors： Mitchell IJ,Griffiths MR

更新日期：2003-06-01 00:00:00

abstract：:Mitochondria, the energy-producing organelles of the eukaryotic cell, originate from an endosymbiotic alpha-proteobacterium. These organelles are believed to have arisen only once in evolutionary history, but despite their common ancestry, mitochondrial DNAs vary extensively throughout eukaryotes in genome architectur...

journal_title：IUBMB life

authors： Burger G,Lang BF

更新日期：2003-04-01 00:00:00

abstract：:We have adapted the Java Molecular Viewer (JMV) to virtual reality display environments, through a number of extensions to the Java 3D code. Phylogenetic information derived from multiple alignments (temporal information) can be overlaid onto molecule structures (spatial information). The number of sequences included ...

journal_title：IUBMB life

authors： Quon GT,Gordon P,Sensen CW

更新日期：2003-04-01 00:00:00

abstract：:The pathogenetic mechanism of the most extensively investigated A3243G mutated tRNALeu(UUR) gene, which causes the MELAS encephalomyopathy, maternally inherited diabetes, or chronic progressive external ophlthalmoplegia, is still unresolved, despite the numerous investigations on the topic. Previous evidences presente...

journal_title：IUBMB life

authors： Wang ZC,Wang XM,Jin YX,Jiao BH,Xu F,Miao MY,Zhu KJ

更新日期：2003-03-01 00:00:00

abstract：:The yeast Saccharomyces cerevisiae is an excellent model for gaining insights into the molecular basis of human mitochondrial disorders, particularly those resulting from impaired mitochondrial metabolism. Yeast is a very well characterized system and most of our current knowledge about mitochondrial biogenesis in hum...

journal_title：IUBMB life

authors： Barrientos A

更新日期：2003-02-01 00:00:00

abstract：:The human nuclear estrogen receptors (i.e., ERalpha and ERbeta), as other transcriptional factors, regulate cellular processes inducing genomic events. In addition, the binding of 17beta-estradiol to ERs induces different membrane initiating non-genomic signaling. The non-genomic effects of ER are independent of trans...

journal_title：IUBMB life

authors： Acconcia F,Bocedi A,Ascenzi P,Marino M

更新日期：2003-01-01 00:00:00

abstract：:We investigated signaling pathways leading to tumor necrosis factor (TNF) alpha-induced intercellular adhesion molecule (ICAM)-1 and vascular cell adhesion molecule (VCAM)-1 expression in chondrosarcoma cells, and determined the functional significance of their expression by examining Jurkat T cell adhesion. TNFalpha ...

journal_title：IUBMB life

authors： Ju JW,Kim SJ,Jun CD,Chun JS

更新日期：2002-11-01 00:00:00

abstract：:The beta/alpha-barrel motif was once considered to be a single protein domain. In recent years, however, it has been shown to consist of smaller substructures displaying the ability to fold autonomously. Here we review the current status of experimental findings concerning the motif's folding behavior in the light of ...

journal_title：IUBMB life

authors： Maiti S,Luthra-Guptasarma M,Guptasarma P

更新日期：2002-10-01 00:00:00

abstract：:Role of nitric oxide (NO) on the expression of organic anion transporter 2 (OAT2) located in sinusoidal domain of hepatocytes has been investigated. Effect of NO generated in vivo in rat and delivered in vitro to hepatocytes was determined. Lipopolysaccharide (LPS) and spermine NONOate (SPER/NO) were selected as the N...

journal_title：IUBMB life

authors： Cha SH,Kim HP,Jung NH,Lee WK,Kim JY,Cha YN

更新日期：2002-09-01 00:00:00

abstract：:Heart disease is the most common cause of morbidity and mortality in Western society and the incidence is projected to increase significantly over the next few decades as our population ages. Heart failure occurs when the heart is unable to pump blood at a rate to commensurate with tissue metabolic requirements and re...

journal_title：IUBMB life

authors： Graham RM,Bishopric NH,Webster KA

更新日期：2002-08-01 00:00:00

abstract：:Xanthomonas campestris pv. campestris, a plant-associated pathogenic bacterium, is the causal agent of foliar spots and blights in crucifers. The major outer membrane protein, Omp37, of 37 kDa, has been identified, purified to homogeneity, and its characterization has also been carried out. Native Omp37 behaved as a t...

journal_title：IUBMB life

authors： Wang L,Zheng Y,Zhang X

更新日期：2002-07-01 00:00:00

abstract：:The functional effect of the interaction of E2F1 and hepatitis B virus X protein (HBx) on the promoter of human p53 gene was studied using chloramphenicol acetyl transferase (CAT) assay. E2F1 activated the p53 promoter through E2F1 binding site. As previously reported, HBx repressed the p53 promoter through E-box. Whe...

journal_title：IUBMB life

authors： Choi M,Lee H,Rho HM

更新日期：2002-06-01 00:00:00

abstract：:The existence of a genetic component in mycobacterial disease susceptibility is no longer in doubt and the investigations now being conducted aim to determine which genes are involved, to what extent, and in which disease phenotype they are relevant. In certain rare instances of susceptibility to poorly pathogenic myc...

journal_title：IUBMB life

authors： Hoal EG

更新日期：2002-04-01 00:00:00