Abstract:
:EGL-15 is a fibroblast growth factor receptor in the nematode Caenorhabditis elegans. Components that mediate EGL-15 signaling have been identified via mutations that confer a Clear (Clr) phenotype, indicative of hyperactivity of this pathway, or a suppressor-of-Clr (Soc) phenotype, indicative of reduced pathway activity. We have isolated a gain-of-function allele of let-60 ras that confers a Clr phenotype and implicated both let-60 ras and components of a mitogen-activated protein kinase cascade in EGL-15 signaling by their Soc phenotype. Epistasis analysis indicates that the gene soc-1 functions in EGL-15 signaling by acting either upstream of or independently of LET-60 RAS. soc-1 encodes a multisubstrate adaptor protein with an amino-terminal pleckstrin homology domain that is structurally similar to the DOS protein in Drosophila and mammalian GAB1. DOS is known to act with the cytoplasmic tyrosine phosphatase Corkscrew (CSW) in signaling pathways in Drosophila. Similarly, the C. elegans CSW ortholog PTP-2 was found to be involved in EGL-15 signaling. Structure-function analysis of SOC-1 and phenotypic analysis of single and double mutants are consistent with a model in which SOC-1 and PTP-2 act together in a pathway downstream of EGL-15 and the Src homology domain 2 (SH2)/SH3-adaptor protein SEM-5/GRB2 contributes to SOC-1-independent activities of EGL-15.
journal_name
Mol Cell Bioljournal_title
Molecular and cellular biologyauthors
Schutzman JL,Borland CZ,Newman JC,Robinson MK,Kokel M,Stern MJdoi
10.1128/MCB.21.23.8104-8116.2001subject
Has Abstractpub_date
2001-12-01 00:00:00pages
8104-16issue
23eissn
0270-7306issn
1098-5549journal_volume
21pub_type
杂志文章abstract::The expression of CD154 (CD40 ligand) by activated T lymphocytes plays a central role in humoral and cellular immunity. The fundamental importance of this protein in mounting an immune response has made it an attractive target for immunomodulation. Several studies have demonstrated that CD154 expression is regulated a...
journal_title:Molecular and cellular biology
pub_type: 杂志文章
doi:10.1128/mcb.23.2.510-525.2003
更新日期:2003-01-01 00:00:00
abstract::The adenovirus type 5 early region 1A (E1A) gene was introduced into neu-transformed B104-1-1 cells. Cells that expressed E1A possessed reduced transforming activity in vitro and reduced tumorigenicity in nude mice. These results demonstrate that the E1A gene products can act negatively to suppress the transformed phe...
journal_title:Molecular and cellular biology
pub_type: 杂志文章
doi:10.1128/mcb.11.3.1745
更新日期:1991-03-01 00:00:00
abstract::The GGAs (Golgi-localized, gamma-ear-containing, ARF-binding proteins) are a family of multidomain adaptor proteins involved in protein sorting at the trans-Golgi network of eukaryotic cells. Here we present results from a functional characterization of the two Saccharomyces cerevisiae GGAs, Gga1p and Gga2p. We show t...
journal_title:Molecular and cellular biology
pub_type: 杂志文章
doi:10.1128/MCB.21.23.7981-7994.2001
更新日期:2001-12-01 00:00:00
abstract::In Saccharomyces cerevisiae, a phosphorelay signal transduction pathway composed of Sln1p, Ypd1p, and Ssk1p, which are homologous to bacterial two-component signal transducers, is involved in the osmosensing mechanism. In response to high osmolarity, the phosphorelay system is inactivated and Ssk1p remains unphosphory...
journal_title:Molecular and cellular biology
pub_type: 杂志文章
doi:10.1128/mcb.23.18.6662-6671.2003
更新日期:2003-09-01 00:00:00
abstract::Drugs that produce covalent interstrand cross-links (ICLs) in DNA remain central to the treatment of cancer, but the cell cycle checkpoints activated by ICLs have received little attention. We have used the fission yeast, Schizosaccharomyces pombe, to elucidate the checkpoint responses to the ICL-inducing anticancer d...
journal_title:Molecular and cellular biology
pub_type: 杂志文章
doi:10.1128/mcb.23.13.4728-4737.2003
更新日期:2003-07-01 00:00:00
abstract::T-lymphocyte stimulation requires activation of several protein kinases, including the major phorbol ester receptor protein kinase C (PKC), ultimately leading to induction of lymphokines, such as interleukin-2 (IL-2). The revelant PKC isoforms which are involved in the activation cascades of nuclear transcription fact...
journal_title:Molecular and cellular biology
pub_type: 杂志文章
doi:10.1128/mcb.16.4.1842
更新日期:1996-04-01 00:00:00
abstract::Saccharomyces cerevisiae mating type switching is a gene conversion event that exhibits donor preference. MATa cells choose HMLalpha for recombination, and MATalpha cells choose HMRa. Donor preference is controlled by the recombination enhancer (RE), located between HMLalpha and MATa on the left arm of chromosome III....
journal_title:Molecular and cellular biology
pub_type: 杂志文章
doi:10.1128/MCB.25.18.7976-7987.2005
更新日期:2005-09-01 00:00:00
abstract::Misfolding of proteins containing abnormal expansions of polyglutamine (polyQ) repeats is associated with cytotoxicity in several neurodegenerative disorders, including Huntington's disease. Recently, the eukaryotic chaperonin TRiC hetero-oligomeric complex has been shown to play an important role in protecting cells ...
journal_title:Molecular and cellular biology
pub_type: 杂志文章
doi:10.1128/MCB.00756-13
更新日期:2014-02-01 00:00:00
abstract::Phosphorylation on tyrosine residues mediated by pp60src appears to be a primary biochemical event leading to the establishment of the transformed phenotype in Rous sarcoma virus (RSV)-infected cells. To identify the cellular proteins that undergo tyrosine phosphorylation during transformation, a 32P-labeled RSV-trans...
journal_title:Molecular and cellular biology
pub_type: 杂志文章
doi:10.1128/mcb.2.6.653
更新日期:1982-06-01 00:00:00
abstract::Mxi2 is a p38alpha splice isoform that is distinctively activated by mitogenic stimuli. Here we show that Mxi2 immunoprecipitates carry a kinase activity that is persistently activated by epidermal growth factor in a fashion regulated by Ras, Raf, and MEK. We demonstrate that this kinase activity can be attributed not...
journal_title:Molecular and cellular biology
pub_type: 杂志文章
doi:10.1128/mcb.23.9.3079-3090.2003
更新日期:2003-05-01 00:00:00
abstract::Transfection of a plasmid encoding the Epstein-Barr virus (EBV) nuclear antigen 2 (EBNA2) gene confers resistance to the antiproliferative effect of alpha interferon (IFN-alpha) in EBV-negative U968 cells (P. Aman and A. von Gabain, EMBO J. 9:147-152, 1990). We studied the expression of IFN-stimulated genes (ISGs) in ...
journal_title:Molecular and cellular biology
pub_type: 杂志文章
doi:10.1128/mcb.12.11.4930
更新日期:1992-11-01 00:00:00
abstract::We demonstrate that ATF3, a member of the ATF/CREB family of transcription factors, is induced in a variety of stressed tissues: mechanically injured liver, toxin-injured liver, blood-deprived heart, and postseizure brain. We also demonstrate that an ATF3-interacting protein, gadd153/Chop10, forms a nonfunctional hete...
journal_title:Molecular and cellular biology
pub_type: 杂志文章
doi:10.1128/mcb.16.3.1157
更新日期:1996-03-01 00:00:00
abstract::A cDNA sequence which contains the entire coding region for human purine nucleoside phosphorylase (PNP) was recombined for selection and expression in mammalian cells. Plasmids containing either the simian virus 40 early promoter or the mouse metallothionein promoter positioned just upstream of the PNP coding sequence...
journal_title:Molecular and cellular biology
pub_type: 杂志文章
doi:10.1128/mcb.5.6.1349
更新日期:1985-06-01 00:00:00
abstract::The complete nucleotide sequence of a genomic clone encoding the mouse skeletal alpha-actin gene has been determined. This single-copy gene codes for a protein identical in primary sequence to the rabbit skeletal alpha-actin. It has a large intron in the 5'-untranslated region 12 nucleotides upstream from the initiato...
journal_title:Molecular and cellular biology
pub_type: 杂志文章
doi:10.1128/mcb.6.1.15
更新日期:1986-01-01 00:00:00
abstract::Although globin mRNAs are considered prototypes of highly stable messages, the mechanisms responsible for their longevity remain largely undefined. As an initial step in identifying potential cis-acting elements or structures which contribute to their stability, we analyzed the defect in expression of a naturally occu...
journal_title:Molecular and cellular biology
pub_type: 杂志文章
doi:10.1128/mcb.14.12.8123
更新日期:1994-12-01 00:00:00
abstract::The human genome contains a number of methyl CpG binding proteins that translate DNA methylation into a physiological response. To gain insight into the function of MBD2 and MBD3, we first applied protein tagging and mass spectrometry. We show that MBD2 and MBD3 assemble into mutually exclusive distinct Mi-2/NuRD-like...
journal_title:Molecular and cellular biology
pub_type: 杂志文章
doi:10.1128/MCB.26.3.843-851.2006
更新日期:2006-02-01 00:00:00
abstract::Myocyte enhancer factor 2 (MEF2) transcription factors cooperate with the MyoD family of basic helix-loop-helix (bHLH) transcription factors to drive skeletal muscle development during embryogenesis, but little is known about the potential functions of MEF2 factors in postnatal skeletal muscle. Here we show that skele...
journal_title:Molecular and cellular biology
pub_type: 杂志文章
doi:10.1128/MCB.01187-07
更新日期:2007-12-01 00:00:00
abstract::Insulin stimulates glucose transport into fat and muscle cells by increasing the exocytic trafficking rate of the GLUT4 facilitative glucose transporter from intracellular stores to the plasma membrane. Delivery of GLUT4 to the plasma membrane is mediated by formation of functional SNARE complexes containing syntaxin4...
journal_title:Molecular and cellular biology
pub_type: 杂志文章
doi:10.1128/MCB.01203-13
更新日期:2014-04-01 00:00:00
abstract::Precisely regulated expression of oncogenes and tumor suppressor genes is essential for normal development, and deregulated expression can lead to cancer. The human N-myc gene normally is expressed in only a subset of fetal epithelial tissues, and its expression is extinguished in all adult tissues except transiently ...
journal_title:Molecular and cellular biology
pub_type: 杂志文章
doi:10.1128/mcb.19.1.155
更新日期:1999-01-01 00:00:00
abstract::Bone morphogenetic protein 7 (BMP7) stimulates renal branching morphogenesis via p38 mitogen-activated protein kinase (p38(MAPK)) and activating transcription factor 2 (ATF-2) (M. C. Hu, D. Wasserman, S. Hartwig, and N. D. Rosenblum, J. Biol. Chem. 279:12051-12059, 2004). Here, we demonstrate a novel role for integrin...
journal_title:Molecular and cellular biology
pub_type: 杂志文章
doi:10.1128/MCB.25.9.3648-3657.2005
更新日期:2005-05-01 00:00:00
abstract::Mos is a germ cell-specific serine/threonine protein kinase that activates mitogen-activated protein kinase (MAPK) through MAPK kinase (MKK). In Xenopus oocytes, Mos synthesis is required for progesterone-induced activation of MAPK and maturation promoting factor. Injection of Mos or active MAPK causes mitotic arrest ...
journal_title:Molecular and cellular biology
pub_type: 杂志文章
doi:10.1128/mcb.15.9.4727
更新日期:1995-09-01 00:00:00
abstract::Human ras genes play central roles in coupling extracellular signals with complex intracellular networks controlling proliferation, differentiation, and apoptosis, among others processes. c-H-ras pre-mRNA can be alternatively processed into two mRNAs due to the inclusion or exclusion of the alternative exon IDX; this ...
journal_title:Molecular and cellular biology
pub_type: 杂志文章
doi:10.1128/mcb.23.8.2927-2941.2003
更新日期:2003-04-01 00:00:00
abstract::The differentiation of dental epithelia into enamel-producing ameloblasts or the root epithelial lineage compartmentalizes teeth into crowns and roots. Bmp signaling has been linked to enamel formation, but its role in root epithelial lineage differentiation is unclear. Here we show that cessation of epithelial Bmp si...
journal_title:Molecular and cellular biology
pub_type: 杂志文章
doi:10.1128/MCB.00456-13
更新日期:2013-12-01 00:00:00
abstract::The C proteins (C1 and C2) of HeLa 40S heterogeneous nuclear ribonucleoprotein particles copurify under native conditions as a stable complex with a fixed molar protein ratio (S.F. Barnett, W.M. LeStourgeon, and D.L. Friedman, J. Biochem. Biophys. Methods 16:87-97, 1988). Gel filtration chromatography and velocity sed...
journal_title:Molecular and cellular biology
pub_type: 杂志文章
doi:10.1128/mcb.9.2.492
更新日期:1989-02-01 00:00:00
abstract::Genomic DNAs of the related parasitic nematodes Onchocerca volvulus and Dirofilariae immitis, and a cDNA library of O. volvulus, were examined for the presence of the 22-nucleotide spliced leader (SL) found at the 5' ends of 10 to 15% of the mRNAs in the free-living nematode Caenorhabditis elegans. As in C. elegans, g...
journal_title:Molecular and cellular biology
pub_type: 杂志文章
doi:10.1128/mcb.10.6.2765
更新日期:1990-06-01 00:00:00
abstract::Self-renewal capacity and pluripotency, which are controlled by the Oct3/4-centered transcriptional regulatory network, are major characteristics of embryonic stem (ES) cells. Nuclear hormone receptor Dax1 is one of the crucial factors in the network. Here, we identified an orphan nuclear receptor, Esrrb (estrogen-rel...
journal_title:Molecular and cellular biology
pub_type: 杂志文章
doi:10.1128/MCB.01520-12
更新日期:2013-05-01 00:00:00
abstract::Mammalian eukaryotic translation initiation factor 4F (eIF4F) is a cap-binding protein complex consisting of three subunits: eIF4E, eIF4A, and eIF4G. In yeast and plants, two related eIF4G species are encoded by two different genes. To date, however, only one functional eIF4G polypeptide, referred to here as eIF4GI, h...
journal_title:Molecular and cellular biology
pub_type: 杂志文章
doi:10.1128/mcb.18.1.334
更新日期:1998-01-01 00:00:00
abstract::Our analysis of rotund (rn) null mutations in Drosophila melanogaster revealed that deletion of the rn locus affects both spermatid and retinal differentiation. In the male reproductive system, the absence of RnRacGAP induced small testes, empty seminal vesicles, short testicular cysts, reduced amounts of interspermat...
journal_title:Molecular and cellular biology
pub_type: 杂志文章
doi:10.1128/mcb.21.18.6280-6291.2001
更新日期:2001-09-01 00:00:00
abstract::During Xenopus development, the synthesis of ribosomal proteins is regulated at the translational level. To identify the region of the ribosomal protein mRNAs responsible for their typical translational behavior, we constructed a fused gene in which the upstream sequences (promoter) and the 5' untranslated sequence (f...
journal_title:Molecular and cellular biology
pub_type: 杂志文章
doi:10.1128/mcb.10.2.816
更新日期:1990-02-01 00:00:00
abstract::Caveolae are specialized microdomains on membranes that are critical for signal transduction, cholesterol transport, and endocytosis. Caveolin-1 (CAV1) is a multifunctional protein and a major component of caveolae. Cav1 is directly activated by hypoxia-inducible factor (HIF). HIFs are heterodimers of an oxygen-sensit...
journal_title:Molecular and cellular biology
pub_type: 杂志文章
doi:10.1128/MCB.00324-14
更新日期:2014-08-01 00:00:00