Saposin A: second cerebrosidase activator protein.

Abstract:

:Saposin A, a heat-stable 16-kDa glycoprotein, was isolated from Gaucher disease spleen and purified to homogeneity. Chemical sequencing from its amino terminus and of peptides obtained by digestion with protease from Staphylococcus aureus strain V-8 demonstrated that saposin A is derived from proteolytic processing of domain 1 of its precursor protein, prosaposin. Processing of prosaposin (70 kDa) also generates three other previously reported saposin proteins, B, C, and D, from its second, third, and fourth domains. Similar to saposin C, saposin A stimulates the hydrolysis of 4-methylumbelliferyl beta-glucoside and glucocerebroside by beta-glucosylceramidase and of galactocerebroside by beta-galactosylceramidase, mainly by increasing the maximal velocity of both reactions. Saposin A is as active as saposin C in these reactions. Saposin A has no significant effect on other sphingolipid and 4-methylumbelliferyl glycoside hydrolases tested. Saposin A has two potential glycosylation sites that appear to be glycosylated. After deglycosylation, saposin A had a subunit molecular mass of 10 kDa and was as active as native saposin A. However, reduction and alkylation abolished the activation. A three-dimensional model comparing saposins A and C reveals significant sequence homology between them, especially preservation of conserved acidic and basic residues in their middle regions. Each appears to possess a conformationally rigid hydrophobic pocket stabilized by three internal disulfide bridges, with amphipathic helical regions interrupted by helix breakers.

authors

Morimoto S,Martin BM,Yamamoto Y,Kretz KA,O'Brien JS,Kishimoto Y

doi

10.1073/pnas.86.9.3389

subject

Has Abstract

pub_date

1989-05-01 00:00:00

pages

3389-93

issue

9

eissn

0027-8424

issn

1091-6490

journal_volume

86

pub_type

杂志文章
  • Comparison of the peptide composition of two histocompatibility-2 alloantigens.

    abstract::The peptide composition of purified Histocompatibility-2 (H-2) reactive glycoprotein fragments from two murine strains allelic at the H-2 locus (H-2(b) and H-2(d)) were compared by a cellulose thin-layer peptide mapping micro technique. Approximately 70 per cent of the theoretical maximum number of peptides produced b...

    journal_title:Proceedings of the National Academy of Sciences of the United States of America

    pub_type: 杂志文章

    doi:10.1073/pnas.65.3.691

    authors: Shimada A,Yamane K,Nathenson SG

    更新日期:1970-03-01 00:00:00

  • Physical interaction between the serotonin transporter and neuronal nitric oxide synthase underlies reciprocal modulation of their activity.

    abstract::The spatiotemporal regulation of neurotransmitter transporters involves proteins that interact with their intracellular domains. Using a proteomic approach, we identified several proteins that interact with the C terminus of the serotonin transporter (SERT). These included neuronal nitric oxide synthase (nNOS), a PSD-...

    journal_title:Proceedings of the National Academy of Sciences of the United States of America

    pub_type: 杂志文章

    doi:10.1073/pnas.0610964104

    authors: Chanrion B,Mannoury la Cour C,Bertaso F,Lerner-Natoli M,Freissmuth M,Millan MJ,Bockaert J,Marin P

    更新日期:2007-05-08 00:00:00

  • Engineering a BCR-ABL-activated caspase for the selective elimination of leukemic cells.

    abstract::Increased understanding of the precise molecular mechanisms involved in cell survival and cell death signaling pathways offers the promise of harnessing these molecules to eliminate cancer cells without damaging normal cells. Tyrosine kinase oncoproteins promote the genesis of leukemias through both increased cell pro...

    journal_title:Proceedings of the National Academy of Sciences of the United States of America

    pub_type: 杂志文章

    doi:10.1073/pnas.1206551110

    authors: Kurokawa M,Ito T,Yang CS,Zhao C,Macintyre AN,Rizzieri DA,Rathmell JC,Deininger MW,Reya T,Kornbluth S

    更新日期:2013-02-05 00:00:00

  • Pre-steady-state DNA unwinding by bacteriophage T4 Dda helicase reveals a monomeric molecular motor.

    abstract::Helicases are molecular motor enzymes that unwind and translocate nucleic acids. One of the central questions regarding helicase activity is whether the process of coupling ATP hydrolysis to DNA unwinding requires an oligomeric form of the enzyme. We have applied a pre-steady-state kinetics approach to address this qu...

    journal_title:Proceedings of the National Academy of Sciences of the United States of America

    pub_type: 杂志文章

    doi:10.1073/pnas.232401899

    authors: Nanduri B,Byrd AK,Eoff RL,Tackett AJ,Raney KD

    更新日期:2002-11-12 00:00:00

  • Variability, compensation, and modulation in neurons and circuits.

    abstract::I summarize recent computational and experimental work that addresses the inherent variability in the synaptic and intrinsic conductances in normal healthy brains and shows that multiple solutions (sets of parameters) can produce similar circuit performance. I then discuss a number of issues raised by this observation...

    journal_title:Proceedings of the National Academy of Sciences of the United States of America

    pub_type: 杂志文章,评审

    doi:10.1073/pnas.1010674108

    authors: Marder E

    更新日期:2011-09-13 00:00:00

  • Temperature dependence of the isotope chemistry of the heavy elements.

    abstract::The temperature coefficient of equilibrium isotope fractionation in the heavy elements is shown to be larger at high temperatures than that expected from the well-studied vibrational isotope effects. The difference in the isotopic behavior of the heavy elements as compared with the light elements is due to the large n...

    journal_title:Proceedings of the National Academy of Sciences of the United States of America

    pub_type: 杂志文章

    doi:10.1073/pnas.93.18.9393

    authors: Bigeleisen J

    更新日期:1996-09-03 00:00:00

  • Pathway of ATP utilization and duplex rRNA unwinding by the DEAD-box helicase, DbpA.

    abstract::DEAD-box RNA helicase proteins use the energy of ATP hydrolysis to drive the unwinding of duplex RNA. However, the mechanism that couples ATP utilization to duplex RNA unwinding is unknown. We measured ATP utilization and duplex RNA unwinding by DbpA, a non-processive bacterial DEAD-box RNA helicase specifically activ...

    journal_title:Proceedings of the National Academy of Sciences of the United States of America

    pub_type: 杂志文章

    doi:10.1073/pnas.0913081107

    authors: Henn A,Cao W,Licciardello N,Heitkamp SE,Hackney DD,De La Cruz EM

    更新日期:2010-03-02 00:00:00

  • Structural stability in the 4-zinc human insulin hexamer.

    abstract::X-ray studies on human insulins prepared by semisynthetic and biosynthetic methods have recently been undertaken. Human insulin differs from porcine insulin only at the COOH terminus of the B-chain. The present study reports the crystal structure of 4-zinc human insulin, which is used clinically as a slow-acting prepa...

    journal_title:Proceedings of the National Academy of Sciences of the United States of America

    pub_type: 杂志文章

    doi:10.1073/pnas.81.22.7093

    authors: Smith GD,Swenson DC,Dodson EJ,Dodson GG,Reynolds CD

    更新日期:1984-11-01 00:00:00

  • Active efflux of tetracycline encoded by four genetically different tetracycline resistance determinants in Escherichia coli.

    abstract::Tetracycline resistance encoded by four genetically different determinants residing on plasmids in Escherichia coli was shown to be associated in each case with an energy-dependent decrease in accumulation of the antibiotic in whole cells in which resistance had been induced. The different class determinants examined ...

    journal_title:Proceedings of the National Academy of Sciences of the United States of America

    pub_type: 杂志文章

    doi:10.1073/pnas.77.7.3974

    authors: McMurry L,Petrucci RE Jr,Levy SB

    更新日期:1980-07-01 00:00:00

  • Functional roles of fructose.

    abstract::During the periimplantation period of pregnancy, pig blastocysts undergo morphological changes and differentiation requiring secretion and transport of nutrients (histotroph) into the uterine lumen. Of these nutrients, glucose is converted to fructose, an isomer of glucose, by conceptus trophectoderm. Although glucose...

    journal_title:Proceedings of the National Academy of Sciences of the United States of America

    pub_type: 杂志文章

    doi:10.1073/pnas.1204298109

    authors: Kim J,Song G,Wu G,Bazer FW

    更新日期:2012-06-19 00:00:00

  • Cloning of the alpha chain of human platelet glycoprotein Ib: a transmembrane protein with homology to leucine-rich alpha 2-glycoprotein.

    abstract::Glycoprotein Ib is a surface membrane glycoprotein of platelets that functions as a receptor for von Willebrand factor. It is a heterodimer composed of an alpha and a beta chain linked by a disulfide bond(s). A phage lambda gt11 cDNA expression library prepared from mRNA from a human erythroleukemia cell line, HEL, wa...

    journal_title:Proceedings of the National Academy of Sciences of the United States of America

    pub_type: 杂志文章

    doi:10.1073/pnas.84.16.5615

    authors: Lopez JA,Chung DW,Fujikawa K,Hagen FS,Papayannopoulou T,Roth GJ

    更新日期:1987-08-01 00:00:00

  • Cloning the expression of a mammalian gene involved in the reduction of methionine sulfoxide residues in proteins.

    abstract::An enzyme that reduces methionine sulfoxide [Met(O)] residues in proteins [peptide Met(O) reductase (MsrA), EC 1.8.4.6; originally identified in Escherichia coli] was purified from bovine liver, and the cDNA encoding this enzyme was cloned and sequenced. The mammalian homologue of E. coli msrA (also called pmsR) cDNA ...

    journal_title:Proceedings of the National Academy of Sciences of the United States of America

    pub_type: 杂志文章

    doi:10.1073/pnas.93.5.2095

    authors: Moskovitz J,Weissbach H,Brot N

    更新日期:1996-03-05 00:00:00

  • Nanoscale morphological evolution of monocrystalline Pt surfaces during cathodic corrosion.

    abstract::This paper studies the cathodic corrosion of a spherical single crystal of platinum in an aqueous alkaline electrolyte, to map out the detailed facet dependence of the corrosion structures forming during this still largely unexplored electrochemical phenomenon. We find that anisotropic corrosion of the platinum electr...

    journal_title:Proceedings of the National Academy of Sciences of the United States of America

    pub_type: 杂志文章

    doi:10.1073/pnas.2017086117

    authors: Arulmozhi N,Hersbach TJP,Koper MTM

    更新日期:2020-12-22 00:00:00

  • Liver-specific mRNA for Insig-2 down-regulated by insulin: implications for fatty acid synthesis.

    abstract::Insig-1 and -2 are closely related proteins of the endoplasmic reticulum (ER) that block proteolytic activation of sterol regulatory element-binding proteins (SREBPs), transcription factors that activate the synthesis of cholesterol and fatty acids in liver and other organs. When cellular cholesterol levels are high, ...

    journal_title:Proceedings of the National Academy of Sciences of the United States of America

    pub_type: 杂志文章

    doi:10.1073/pnas.0130116100

    authors: Yabe D,Komuro R,Liang G,Goldstein JL,Brown MS

    更新日期:2003-03-18 00:00:00

  • Mapping the HLA-DO/HLA-DM complex by FRET and mutagenesis.

    abstract::HLA-DO (DO) is a nonclassic class II heterodimer that inhibits the action of the class II peptide exchange catalyst, HLA-DM (DM), and influences DM localization within late endosomes and exosomes. In addition, DM acts as a chaperone for DO and is required for its egress from the endoplasmic reticulum (ER). These recip...

    journal_title:Proceedings of the National Academy of Sciences of the United States of America

    pub_type: 杂志文章

    doi:10.1073/pnas.1113966109

    authors: Yoon T,Macmillan H,Mortimer SE,Jiang W,Rinderknecht CH,Stern LJ,Mellins ED

    更新日期:2012-07-10 00:00:00

  • Site-specific genome editing for correction of induced pluripotent stem cells derived from dominant dystrophic epidermolysis bullosa.

    abstract::Genome editing with engineered site-specific endonucleases involves nonhomologous end-joining, leading to reading frame disruption. The approach is applicable to dominant negative disorders, which can be treated simply by knocking out the mutant allele, while leaving the normal allele intact. We applied this strategy ...

    journal_title:Proceedings of the National Academy of Sciences of the United States of America

    pub_type: 杂志文章

    doi:10.1073/pnas.1512028113

    authors: Shinkuma S,Guo Z,Christiano AM

    更新日期:2016-05-17 00:00:00

  • ACE2 is required for daughter cell-specific G1 delay in Saccharomyces cerevisiae.

    abstract::Saccharomyces cerevisiae cells reproduce by budding to yield a mother cell and a smaller daughter cell. Although both mother and daughter begin G1 simultaneously, the mother cell progresses through G1 more rapidly. Daughter cell G1 delay has long been thought to be due to a requirement for attaining a certain critical...

    journal_title:Proceedings of the National Academy of Sciences of the United States of America

    pub_type: 杂志文章

    doi:10.1073/pnas.1833999100

    authors: Laabs TL,Markwardt DD,Slattery MG,Newcomb LL,Stillman DJ,Heideman W

    更新日期:2003-09-02 00:00:00

  • Mechanisms of Kirsten murine sarcoma virus transformation-induced changes in the collagen phenotype and synthetic rate of BALB 3T3 cells.

    abstract::Specific viral transformation rather than cell selection can explain the previously observed increase in the proportion of type III procollagen compared to type I procollagen in BALB 3T3 cells transformed by Kirsten murine sarcoma virus (Ki-MSV). Two subclones of BALB 3T3 A31 were productively infected with with a tem...

    journal_title:Proceedings of the National Academy of Sciences of the United States of America

    pub_type: 杂志文章

    doi:10.1073/pnas.78.10.6028

    authors: Bateman JF,Peterkofsky B

    更新日期:1981-10-01 00:00:00

  • The C-terminal domain-phosphorylated IIO form of RNA polymerase II is associated with the transcription repressor NC2 (Dr1/DRAP1) and is required for transcription activation in human nuclear extracts.

    abstract::Activation of class II gene transcription may involve alleviation of transcription repression as well as stimulation of the assembly and function of the general RNA polymerase (RNAP) II transcription machinery. Here, we investigated whether activator-reversible transcription repression by NC2 (Dr1/DRAP1) contributes t...

    journal_title:Proceedings of the National Academy of Sciences of the United States of America

    pub_type: 杂志文章

    doi:10.1073/pnas.140202297

    authors: Castaño E,Gross P,Wang Z,Roeder RG,Oelgeschläger T

    更新日期:2000-06-20 00:00:00

  • Isolation of a diterpenoid substance with potent neuroprotective activity from fetal calf serum.

    abstract::Excess activation of glutamate receptors and production of free radicals including nitric oxide may result in severe and irreversible damage to the mammalian central nervous system (CNS), but endogenous defense systems that protect neurons from these insults are poorly understood. Here, we purified and isolated a neur...

    journal_title:Proceedings of the National Academy of Sciences of the United States of America

    pub_type: 杂志文章

    doi:10.1073/pnas.052693999

    authors: Kume T,Asai N,Nishikawa H,Mano N,Terauchi T,Taguchi R,Shirakawa H,Osakada F,Mori H,Asakawa N,Yonaga M,Nishizawa Y,Sugimoto H,Shimohama S,Katsuki H,Kaneko S,Akaike A

    更新日期:2002-03-05 00:00:00

  • Transgenic system for conditional induction and rescue of chronic myocardial hibernation provides insights into genomic programs of hibernation.

    abstract::A key energy-saving adaptation to chronic hypoxia that enables cardiomyocytes to withstand severe ischemic insults is hibernation, i.e., a reversible arrest of contractile function. Whereas hibernating cardiomyocytes represent the critical reserve of dysfunctional cells that can be potentially rescued, a lack of a sui...

    journal_title:Proceedings of the National Academy of Sciences of the United States of America

    pub_type: 杂志文章

    doi:10.1073/pnas.0707778105

    authors: May D,Gilon D,Djonov V,Itin A,Lazarus A,Gordon O,Rosenberger C,Keshet E

    更新日期:2008-01-08 00:00:00

  • Antibody-dependent enhancement of influenza disease promoted by increase in hemagglutinin stem flexibility and virus fusion kinetics.

    abstract::Several next-generation (universal) influenza vaccines and broadly neutralizing antibodies (bNAbs) are in clinical development. Some of these mediate inhibitions of virus replication at the postentry stage or use Fc-dependent mechanisms. Nonneutralizing antibodies have the potential to mediate enhancement of viral inf...

    journal_title:Proceedings of the National Academy of Sciences of the United States of America

    pub_type: 杂志文章

    doi:10.1073/pnas.1821317116

    authors: Winarski KL,Tang J,Klenow L,Lee J,Coyle EM,Manischewitz J,Turner HL,Takeda K,Ward AB,Golding H,Khurana S

    更新日期:2019-07-23 00:00:00

  • Cholecystokinin release triggered by NMDA receptors produces LTP and sound-sound associative memory.

    abstract::Memory is stored in neural networks via changes in synaptic strength mediated in part by NMDA receptor (NMDAR)-dependent long-term potentiation (LTP). Here we show that a cholecystokinin (CCK)-B receptor (CCKBR) antagonist blocks high-frequency stimulation-induced neocortical LTP, whereas local infusion of CCK induces...

    journal_title:Proceedings of the National Academy of Sciences of the United States of America

    pub_type: 杂志文章

    doi:10.1073/pnas.1816833116

    authors: Chen X,Li X,Wong YT,Zheng X,Wang H,Peng Y,Feng H,Feng J,Baibado JT,Jesky R,Wang Z,Xie H,Sun W,Zhang Z,Zhang X,He L,Zhang N,Zhang Z,Tang P,Su J,Hu LL,Liu Q,He X,Tan A,Sun X,Li M,Wong K,Wang X,Cheung

    更新日期:2019-03-26 00:00:00

  • Long-term neurocognitive benefits of FLASH radiotherapy driven by reduced reactive oxygen species.

    abstract::Here, we highlight the potential translational benefits of delivering FLASH radiotherapy using ultra-high dose rates (>100 Gy⋅s-1). Compared with conventional dose-rate (CONV; 0.07-0.1 Gy⋅s-1) modalities, we showed that FLASH did not cause radiation-induced deficits in learning and memory in mice. Moreover, 6 months a...

    journal_title:Proceedings of the National Academy of Sciences of the United States of America

    pub_type: 杂志文章

    doi:10.1073/pnas.1901777116

    authors: Montay-Gruel P,Acharya MM,Petersson K,Alikhani L,Yakkala C,Allen BD,Ollivier J,Petit B,Jorge PG,Syage AR,Nguyen TA,Baddour AAD,Lu C,Singh P,Moeckli R,Bochud F,Germond JF,Froidevaux P,Bailat C,Bourhis J,Vozenin MC

    更新日期:2019-05-28 00:00:00

  • Spatial and temporal second messenger codes for growth cone turning.

    abstract::Cyclic AMP (cAMP) and calcium are ubiquitous, interdependent second messengers that regulate a wide range of cellular processes. During development of neuronal networks they are critical for the first step of circuit formation, transducing signals required for axon pathfinding. Surprisingly, the spatial and temporal c...

    journal_title:Proceedings of the National Academy of Sciences of the United States of America

    pub_type: 杂志文章

    doi:10.1073/pnas.1100247108

    authors: Nicol X,Hong KP,Spitzer NC

    更新日期:2011-08-16 00:00:00

  • H2O2-induced uncoupling of bovine lens Na+,K+-ATPase.

    abstract::A 1-hr exposure of bovine lenses in organ culture to H2O2 concentrations in the range found in the aqueous fluid of patients with cataracts inhibits 86Rb+ influx. At 1 mM H2O2, complete inhibition was observed and further investigated. Membrane permeability is slightly decreased. Although lactate concentrations increa...

    journal_title:Proceedings of the National Academy of Sciences of the United States of America

    pub_type: 杂志文章

    doi:10.1073/pnas.80.7.2044

    authors: Garner WH,Garner MH,Spector A

    更新日期:1983-04-01 00:00:00

  • High accuracy finite difference approximation to solutions of elliptic partial differential equations.

    abstract::A flexible finite difference method is described that gives approximate solutions of linear elliptic partial differential equations, Lu = G, subject to general linear boundary conditions. The method gives high-order accuracy. The values of the unknown approximation function U are determined at mesh points by solving a...

    journal_title:Proceedings of the National Academy of Sciences of the United States of America

    pub_type: 杂志文章

    doi:10.1073/pnas.75.6.2541

    authors: Lynch RE,Rice JR

    更新日期:1978-06-01 00:00:00

  • Rat liver microsomal and lysosomal beta-glucuronidases differ in both carbohydrate and amino acid compositions.

    abstract::To investigate the chemical relationships between rat liver lysosomal and microsomal beta-D-glucuronidases (EC 3.2.1.31), which are essentially identical catalytically and in reactivity with antibody and similar in molecular weight, the two enzymes were isolated by procedures in which modifications of the proteins wer...

    journal_title:Proceedings of the National Academy of Sciences of the United States of America

    pub_type: 杂志文章

    doi:10.1073/pnas.75.7.3080

    authors: Tulsiani DR,Six H,Touster O

    更新日期:1978-07-01 00:00:00

  • Distribution of UDPglucuronosyltransferase in rat tissue.

    abstract::UDPglucuronosyltransferase [UDPglucuronate beta-D-glucuronosyltransferase (acceptor-unspecific), EC 2.4.1.17] is a group of enzymes with distinct but partially overlapping substrate specificity. A rabbit antiserum raised against one purified rat liver UDPglycuronosyltransferase isoform was specific for UDPglucuronosyl...

    journal_title:Proceedings of the National Academy of Sciences of the United States of America

    pub_type: 杂志文章

    doi:10.1073/pnas.82.9.2990

    authors: Chowdhury JR,Novikoff PM,Chowdhury NR,Novikoff AB

    更新日期:1985-05-01 00:00:00

  • Physical exertion exacerbates decline in the musculature of an animal model of Duchenne muscular dystrophy.

    abstract::Duchenne muscular dystrophy (DMD) is a genetic disorder caused by loss of the protein dystrophin. In humans, DMD has early onset, causes developmental delays, muscle necrosis, loss of ambulation, and death. Current animal models have been challenged by their inability to model the early onset and severity of the disea...

    journal_title:Proceedings of the National Academy of Sciences of the United States of America

    pub_type: 杂志文章

    doi:10.1073/pnas.1811379116

    authors: Hughes KJ,Rodriguez A,Flatt KM,Ray S,Schuler A,Rodemoyer B,Veerappan V,Cuciarone K,Kullman A,Lim C,Gutta N,Vemuri S,Andriulis V,Niswonger D,Barickman L,Stein W,Singhvi A,Schroeder NE,Vidal-Gadea AG

    更新日期:2019-02-26 00:00:00