Studies of partially transforming polyomavirus mutants establish a role for phosphatidylinositol 3-kinase in activation of pp70 S6 kinase.

abstract：:Phosphoinositide-specific phospholipase C-gamma1 (PLC-gamma1) is a key enzyme that governs cellular functions such as gene transcription, secretion, proliferation, motility, and development. Here, we show that PLC-gamma1 is regulated via a novel autoinhibitory mechanism involving its carboxy-terminal Src homology (SH2...

journal_title：Molecular and cellular biology

authors： DeBell K,Graham L,Reischl I,Serrano C,Bonvini E,Rellahan B

更新日期：2007-02-01 00:00:00

abstract：:As revealed by intracellular pools of nonactive Fas (Apo-1), export of Fas to the cell surface is often impaired in human tumors, thereby inactivating Fas ligand-mediated apoptosis. Here, we demonstrate that association with Fas-associated phosphatase 1 (FAP-1) attenuates Fas export to the cell surface. Forced express...

journal_title：Molecular and cellular biology

authors： Ivanov VN,Lopez Bergami P,Maulit G,Sato TA,Sassoon D,Ronai Z

更新日期：2003-05-01 00:00:00

abstract：:We examined the mechanisms that control the downregulation of the c-myc mRNA during differentiation of HL60 cells. On treatment with dimethyl sulfoxide, HL60 cells downmodulated their steady-state c-myc message levels, ceased to proliferate, and underwent terminal differentiation. In nuclear run-on assays in which dis...

journal_title：Molecular and cellular biology

authors： Siebenlist U,Bressler P,Kelly K

更新日期：1988-02-01 00:00:00

abstract：:We examined the relationship between pre-mRNA splicing and the nuclear matrix by using an in vivo system that we have developed. Plasmids containing the inducible herpesvirus tk gene promoter linked to an intron-containing segment of the rabbit beta-globin gene were transfected into HeLa cells, and then the promoter w...

journal_title：Molecular and cellular biology

authors： Zeitlin S,Parent A,Silverstein S,Efstratiadis A

更新日期：1987-01-01 00:00:00

abstract：:DET1 (de-etiolated 1) is an essential negative regulator of plant light responses, and it is a component of the Arabidopsis thaliana CDD complex containing DDB1 and COP10 ubiquitin E2 variant. Human DET1 has recently been isolated as one of the DDB1- and Cul4A-associated factors, along with an array of WD40-containing...

journal_title：Molecular and cellular biology

authors： Pick E,Lau OS,Tsuge T,Menon S,Tong Y,Dohmae N,Plafker SM,Deng XW,Wei N

更新日期：2007-07-01 00:00:00

abstract：:Mona/Gads is a Grb2-related, Src homology 3 (SH3) and SH2 domain-containing adapter protein whose expression is restricted to cells of hematopoietic lineage (i.e., monocytes and T lymphocytes). During monocyte/macrophage differentiation, Mona is induced and interacts with the macrophage colony-stimulating factor recep...

journal_title：Molecular and cellular biology

authors： Bourgin C,Bourette RP,Arnaud S,Liu Y,Rohrschneider LR,Mouchiroud G

更新日期：2002-06-01 00:00:00

abstract：:We assayed phosphatidylinositol (PI) kinase (EC 2.7.1.67) activity in detergent extracts of nontransformed or virus-transformed cells. Nontransformed chicken embryo fibroblasts (CEF) contain PI kinase activity with an apparent specific activity of 20 pmol/min per mg of protein. This activity sedimented as a single pea...

journal_title：Molecular and cellular biology

authors： Sugano S,Hanafusa H

更新日期：1985-09-01 00:00:00

abstract：:Alternative mRNA splicing is an important means of diversifying function in higher eukaryotes. Notably, both NCoR and SMRT corepressors are subject to alternative mRNA splicing, yielding a series of distinct corepressor variants with highly divergent functions. Normal adipogenesis is associated with a switch in corepr...

journal_title：Molecular and cellular biology

authors： Goodson ML,Young BM,Snyder CA,Schroeder AC,Privalsky ML

更新日期：2014-11-15 00:00:00

abstract：:The activity of the tumor suppressor p53 is tightly controlled by its main negative regulator, Mdm2, which inhibits p53's transcriptional activity and targets it for degradation via the proteasome pathway. The closely related Mdm2 homolog, MdmX, is also considered to be a general inhibitor of transactivation by p53, t...

journal_title：Molecular and cellular biology

authors： Biderman L,Poyurovsky MV,Assia Y,Manley JL,Prives C

更新日期：2012-04-01 00:00:00

abstract：:We used transformation to insert a selectable marker at various sites in the Saccharomyces cerevisiae genome occupied by the transposable element Ty. The vector CV9 contains the LEU2+ gene and a portion of the repeated element Ty1-17. Transformation with this plasmid resulted in integration of the vector via a recipro...

journal_title：Molecular and cellular biology

authors： Klein HL,Petes TD

更新日期：1984-02-01 00:00:00

abstract：:We show that the nuclear genes for the cytoplasmic and mitochondrial leucyl-tRNA synthetase (LeuRS) of Neurospora crassa are distinct in their encoded proteins, codon usage, mRNA levels, and regulation. The 4.2-kilobase-pair region representing the structural gene for cytoplasmic LeuRS and flanking regions has been se...

journal_title：Molecular and cellular biology

authors： Chow CM,Rajbhandary UL

更新日期：1989-11-01 00:00:00

abstract：:Fragments of the TAR DNA-binding protein 43 (TDP43) are major components of intracellular aggregates associated with amyotrophic lateral sclerosis and frontotemporal dementia. A variety of C-terminal fragments (CTFs) exist, with distinct N termini; however, little is known regarding their differences in metabolism and...

journal_title：Molecular and cellular biology

authors： Kasu YAT,Alemu S,Lamari A,Loew N,Brower CS

更新日期：2018-09-14 00:00:00

abstract：:Transfection experiments with constructs containing various 5'-deleted fragments of the human lipoprotein lipase (LPL) promoter and the chloramphenicol acetyltransferase reporter gene revealed an LPL silencer element (LSE) in the region of nucleotides -225 to -81 of the LPL gene that functioned in Chinese hamster ovar...

journal_title：Molecular and cellular biology

authors： Tanuma Y,Nakabayashi H,Esumi M,Endo H

更新日期：1995-01-01 00:00:00

abstract：:Gradients of Wnt/beta-catenin signaling coordinate development and physiological homeostasis in metazoan animals. Proper embryonic development of the fruit fly Drosophila melanogaster requires the Naked cuticle (Nkd) protein to attenuate a gradient of Wnt/beta-catenin signaling across each segmental anlage. Nkd inhibi...

journal_title：Molecular and cellular biology

authors： Zhang S,Cagatay T,Amanai M,Zhang M,Kline J,Castrillon DH,Ashfaq R,Oz OK,Wharton KA Jr

更新日期：2007-06-01 00:00:00

abstract：:Entry into mitosis depends upon activation of the dual-specificity phosphatase Cdc25C, which dephosphorylates and activates the cyclin B-Cdc2 complex. Previous work has shown that the Xenopus polo-like kinase Plx1 can phosphorylate and activate Cdc25C in vitro. In the work presented here, we demonstrate that Plx1 is a...

journal_title：Molecular and cellular biology

authors： Qian YW,Erikson E,Li C,Maller JL

更新日期：1998-07-01 00:00:00

abstract：:A new member of a family of site-specific retrotransposons is described in the New World trypanosome Trypanosoma cruzi. This element, CZAR (cruzi-associated retrotransposon), resembles two previously described retrotransposons found in the African trypanosome T. brucei gambiense and the mosquito trypanosomatid Crithid...

journal_title：Molecular and cellular biology

authors： Villanueva MS,Williams SP,Beard CB,Richards FF,Aksoy S

更新日期：1991-12-01 00:00:00

abstract：:Transcriptional factors of the NFAT family play an important role in regulating the expression of several cytokine genes during the immune response, such as the genes for interleukin 2 (IL-2) and IL-4, among others. Upon antigen stimulation, precursor CD4+ T helper (pTh) cells proliferate and differentiate into two po...

journal_title：Molecular and cellular biology

authors： Rincón M,Flavell RA

更新日期：1997-03-01 00:00:00

abstract：:TBC (Tre-2/Bub2/Cdc16) domains are predicted to encode GTPase-activating proteins (GAPs) for Rab family G proteins. While approximately 50 TBC proteins are predicted to exist in humans, little is known about their substrate specificity. Here we show that TRE17 (also called Tre-2 and USP6), a founding member of the TBC...

journal_title：Molecular and cellular biology

authors： Martinu L,Masuda-Robens JM,Robertson SE,Santy LC,Casanova JE,Chou MM

更新日期：2004-11-01 00:00:00

abstract：:Translation initiation plays an important role in cell growth, proliferation, and survival. The translation initiation factor eIF4B (eukaryotic initiation factor 4B) stimulates the RNA helicase activity of eIF4A in unwinding secondary structures in the 5' untranslated region (5'UTR) of the mRNA in vitro. Here, we stud...

journal_title：Molecular and cellular biology

authors： Shahbazian D,Parsyan A,Petroulakis E,Topisirovic I,Martineau Y,Gibbs BF,Svitkin Y,Sonenberg N

更新日期：2010-03-01 00:00:00

abstract：:Oncostatin M is a polypeptide cytokine, produced by normal and malignant hematopoietic cells, that has several in vitro activities, including the ability to inhibit growth of cultured carcinoma cells. Here we present a structural and functional comparison of two oncostatin M-related proteins (Mr 36,000 and 32,000) sec...

journal_title：Molecular and cellular biology

authors： Linsley PS,Kallestad J,Ochs V,Neubauer M

更新日期：1990-05-01 00:00:00

abstract：:Csn3 (Cops3) maps to the mouse chromosome 11 region syntenic to the common deletion interval for the Smith-Magenis syndrome, a contiguous gene deletion syndrome. It encodes the third subunit of an eight-subunit protein complex, the COP9 signalosome (CSN), which controls a wide variety of molecules of different functio...

journal_title：Molecular and cellular biology

authors： Yan J,Walz K,Nakamura H,Carattini-Rivera S,Zhao Q,Vogel H,Wei N,Justice MJ,Bradley A,Lupski JR

更新日期：2003-10-01 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

authors： Mullins C,Bonifacino JS

更新日期：2001-12-01 00:00:00

abstract：:Mitotic chromosome condensation is chiefly driven by the condensin complex. The specific recognition (targeting) of chromosomal sites by condensin is an important component of its in vivo activity. We previously identified the rRNA gene cluster in Saccharomyces cerevisiae as an important condensin-binding site, but bo...

journal_title：Molecular and cellular biology

authors： Wang BD,Eyre D,Basrai M,Lichten M,Strunnikov A

更新日期：2005-08-01 00:00:00

abstract：:The cardiac troponin C (cTnC) gene produces identical transcripts in slow-twitch skeletal muscle and in heart muscle (R. Gahlmann, R. Wade, P. Gunning, and L. Kedes, J. Mol. Biol. 201:379-391, 1988). A separate gene encodes the fast-twitch skeletal muscle troponin C and is not expressed in heart muscle. We have used t...

journal_title：Molecular and cellular biology

authors： Christensen TH,Prentice H,Gahlmann R,Kedes L

更新日期：1993-11-01 00:00:00

abstract：:Addition of serum to mitogen-starved cells activates the cellular immediate-early gene (IEG) response. Serum response factor (SRF) contributes to such mitogen-stimulated transcriptional induction of many IEGs during the G0-G1 cell cycle transition. SRF is also believed to be essential for cell cycle progression, as im...

journal_title：Molecular and cellular biology

authors： Schratt G,Weinhold B,Lundberg AS,Schuck S,Berger J,Schwarz H,Weinberg RA,Rüther U,Nordheim A

更新日期：2001-04-01 00:00:00

abstract：:USF is a family of basic helix-loop transcriptional factors that recognizes DNA-binding sites similar to those of the Myc oncoproteins. Here, various functional domains in the mouse USF2 protein were identified and characterized. Indirect immunofluorescence studies with transiently transfected cells revealed that both...

journal_title：Molecular and cellular biology

authors： Luo X,Sawadogo M

更新日期：1996-04-01 00:00:00

abstract：:Individual steps in the processing of pre-mRNA, including 5'-end cap formation, splicing, and 3'-end processing (cleavage and polyadenylation) are highly integrated and can influence one another. In addition, prior splicing can influence downstream steps in gene expression, including export of mRNA from the nucleus. H...

journal_title：Molecular and cellular biology

authors： McCracken S,Lambermon M,Blencowe BJ

更新日期：2002-01-01 00:00:00

abstract：:Mutations induced by UVB (313-nm) radiation, a wavelength in the region of peak effectiveness for sunlight-induced skin cancer in humans, have been analyzed at the sequence level in simian cells by using a plasmid shuttle vector (pZ189). We find that significant differences exist between the types of mutations induced...

journal_title：Molecular and cellular biology

authors： Keyse SM,Amaudruz F,Tyrrell RM

更新日期：1988-12-01 00:00:00

abstract：:Activation of the macrophage cell line RAW 264.7 with lipopolysaccharide (LPS) transiently activates protein kinase C zeta (PKC zeta) and Jun N-terminal kinase (JNK) through a phosphoinositide-3-kinase (PI3-kinase)-dependent pathway. Incubation of LPS-treated cells with the cyclopentenone 15-deoxy-Delta(12,14)-prostag...

journal_title：Molecular and cellular biology

authors： Castrillo A,Través PG,Martín-Sanz P,Parkinson S,Parker PJ,Boscá L

更新日期：2003-02-01 00:00:00

abstract：:We have isolated a yeast conditional mutant which rapidly ceases synthesis of mRNA when subjected to the nonpermissive temperature. This mutant (rpb1-1) was constructed by replacing the wild-type chromosomal copy of the gene encoding the largest subunit of RNA polymerase II with one mutagenized in vitro. The rapid ces...

journal_title：Molecular and cellular biology

authors： Nonet M,Scafe C,Sexton J,Young R

更新日期：1987-05-01 00:00:00