Guanine nucleotide activation of, and competition between, RAS proteins from Saccharomyces cerevisiae.

abstract：:The on/off state of the binary switch gene Sex-lethal (Sxl), which controls somatic sexual development in Drosophila melanogaster, is regulated at the level of alternative splicing. In males, in which the gene is off, the default splicing machinery produces nonfunctional mRNAs; in females, in which the gene is on, the...

journal_title：Molecular and cellular biology

authors： Horabin JI,Schedl P

更新日期：1993-12-01 00:00:00

abstract：:The 3' poly(A) tail of eukaryotic mRNAs and the poly(A) binding protein (PABP) play important roles in the regulation of translation. Recently, a human PABP-interacting protein, Paip2, which disrupts the PABP-poly(A) interaction and consequently inhibits translation, was described. To gain insight into the biological ...

journal_title：Molecular and cellular biology

authors： Roy G,Miron M,Khaleghpour K,Lasko P,Sonenberg N

更新日期：2004-02-01 00:00:00

abstract：:Deregulated signaling by the four members of the epidermal growth factor receptor tyrosine kinase family (erbB family) is implicated in the genesis or progression of human cancers. However, efforts to analyze signaling by these receptors have been hampered by the diversity of ligands and extensive interreceptor cross ...

journal_title：Molecular and cellular biology

authors： Riese DJ 2nd,van Raaij TM,Plowman GD,Andrews GC,Stern DF

更新日期：1995-10-01 00:00:00

abstract：:Alternative splicing of the locus AbetaH-J-J generates three functionally distinct proteins: an enzyme, AbetaH (aspartyl-beta-hydroxylase), a structural protein of the sarcoplasmic reticulum membrane (junctin), and an integral membrane calcium binding protein (junctate). Junctin and junctate are two important proteins...

journal_title：Molecular and cellular biology

authors： Feriotto G,Finotti A,Volpe P,Treves S,Ferrari S,Angelelli C,Zorzato F,Gambari R

更新日期：2005-04-01 00:00:00

abstract：:Chicken heart mesenchymal cells do not proliferate in medium of physiological composition containing plasma (S. Balk, Proc. Natl. Acad. Sci. USA 77:6606-6610, 1980). To understand the molecular events involved in cell quiescence and in the initiation of cell division under physiological conditions, we examined the dif...

journal_title：Molecular and cellular biology

authors： Bédard PA,Balk SD,Gunther HS,Morisi A,Erikson RL

更新日期：1987-04-01 00:00:00

abstract：:The human immunodeficiency virus type 1 (HIV-1) Tat protein activates transcription elongation by stimulating the Tat-activated kinase (TAK/p-TEFb), a protein kinase composed of CDK9 and its cyclin partner, cyclin T1. CDK9 is able to hyperphosphorylate the carboxyl-terminal domain (CTD) of the large subunit of RNA pol...

journal_title：Molecular and cellular biology

authors： Bourgeois CF,Kim YK,Churcher MJ,West MJ,Karn J

更新日期：2002-02-01 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

authors： Lambert S,Mason SJ,Barber LJ,Hartley JA,Pearce JA,Carr AM,McHugh PJ

更新日期：2003-07-01 00:00:00

abstract：:The Epstein-Barr virus BRLF1 and BZLF1 genes are the first viral genes transcribed upon induction of the viral lytic cycle. The protein products of both genes (referred to here as Rta and Zta, respectively) activate expression of other viral genes, thereby initiating the lytic cascade. Among the viral antigens express...

journal_title：Molecular and cellular biology

authors： Flemington EK,Lytle JP,Cayrol C,Borras AM,Speck SH

更新日期：1994-05-01 00:00:00

abstract：:The v-myb oncogene of avian myeloblastosis virus causes acute myelomonocytic leukemia in chickens and transforms avian myeloid cells in vitro. Its protein product p48v-myb is a nuclear, sequence-specific, DNA-binding protein which activates gene expression in transient DNA transfection studies. To investigate the rela...

journal_title：Molecular and cellular biology

authors： Lane T,Ibanez C,Garcia A,Graf T,Lipsick J

更新日期：1990-06-01 00:00:00

abstract：:V(D)J recombination requires binding and synapsis of a complementary (12/23) pair of recombination signal sequences (RSSs) by the RAG1 and RAG2 proteins, aided by a high-mobility group protein, HMG1 or HMG2. Double-strand DNA cleavage within this synaptic, or paired, complex is thought to involve DNA distortion or mel...

journal_title：Molecular and cellular biology

authors： Ciubotaru M,Schatz DG

更新日期：2004-10-01 00:00:00

abstract：:Telomere stabilization is critical for tumorigenesis. A number of tumors and cell lines use a recombination-based mechanism, alternative lengthening of telomeres (ALT), to maintain telomere repeat arrays. Current data suggest that the mutation of p53 facilitates the activation of this pathway. In addition to its funct...

journal_title：Molecular and cellular biology

authors： Razak ZR,Varkonyi RJ,Kulp-McEliece M,Caslini C,Testa JR,Murphy ME,Broccoli D

更新日期：2004-07-01 00:00:00

abstract：:Protein phosphatase 2A (PP2A) is a multimeric serine/threonine phosphatase that carries out multiple functions. Although numerous observations suggest that PP2A plays a major role in downregulation of the mitogen-activated protein (MAP) kinase pathway, the precise mechanisms are unknown. To clarify the role of PP2A in...

journal_title：Molecular and cellular biology

authors： Ugi S,Imamura T,Ricketts W,Olefsky JM

更新日期：2002-04-01 00:00:00

abstract：:Mutant strain d48 of Paramecium tetraurelia lacks the gene for antigen A in the macronucleus, whereas this gene is present in the micronucleus. Transfer of macronucleoplasm from the wild type to strain d48 caused d48 to revert to the wild type after autogamy. Transfer of cytoplasm was not as effective as transfer of m...

journal_title：Molecular and cellular biology

authors： Harumoto T

更新日期：1986-10-01 00:00:00

abstract：:Insulin stimulation of differentiated 3T3-L1 adipocytes or Chinese hamster ovary cells expressing high levels of the insulin receptor resulted in a time-dependent decrease in the electrophoretic mobility of SOS on sodium dodecyl sulfate-polyacrylamide gels. The reduction in SOS mobility was completely reversed by alka...

journal_title：Molecular and cellular biology

authors： Waters SB,Yamauchi K,Pessin JE

更新日期：1995-05-01 00:00:00

abstract：:The genes of the trithorax group (trxG) in Drosophila melanogaster are required to maintain the pattern of homeotic gene expression that is established early in embryogenesis by the transient expression of the segmentation genes. The precise role of each of the diverse trxG members and the functional relationships amo...

journal_title：Molecular and cellular biology

authors： Crosby MA,Miller C,Alon T,Watson KL,Verrijzer CP,Goldman-Levi R,Zak NB

更新日期：1999-02-01 00:00:00

abstract：:The kidney's vital filtration function depends on the structural integrity of the glomerulus, the proximal portion of the nephron. Within the glomerulus, the architecturally complex podocyte forms the final cellular barrier to filtration. Injury to the podocyte results in a morphological change called foot process eff...

journal_title：Molecular and cellular biology

authors： Yu H,Suleiman H,Kim AH,Miner JH,Dani A,Shaw AS,Akilesh S

更新日期：2013-12-01 00:00:00

abstract：:The steroid hormone progesterone regulates proliferation and differentiation in the mammary gland and uterus by cell cycle phase-specific actions. The long-term effect of progestins on T-47D breast cancer cells is inhibition of cellular proliferation. This is accompanied by decreased G(1) cyclin-dependent kinase (CDK)...

journal_title：Molecular and cellular biology

authors： Swarbrick A,Lee CS,Sutherland RL,Musgrove EA

更新日期：2000-04-01 00:00:00

abstract：:The Myt1 protein kinase functions to negatively regulate Cdc2-cyclin B complexes by phosphorylating Cdc2 on threonine 14 and tyrosine 15. Throughout interphase, human Myt1 localizes to the endoplasmic reticulum and Golgi complex, whereas Cdc2-cyclin B1 complexes shuttle between the nucleus and the cytoplasm. Here we r...

journal_title：Molecular and cellular biology

authors： Liu F,Rothblum-Oviatt C,Ryan CE,Piwnica-Worms H

更新日期：1999-07-01 00:00:00

abstract：:Transcription factor-induced reprogramming of somatic cells to pluripotency is mediated via profound alterations in the epigenetic landscape. The histone variant macroH2A1 (mH2A1) is a barrier to the cellular reprogramming process. We demonstrate here that mH2A1 blocks reprogramming and contributes to the preservation...

journal_title：Molecular and cellular biology

authors： Pliatska M,Kapasa M,Kokkalis A,Polyzos A,Thanos D

更新日期：2018-04-30 00:00:00

abstract：:The accumulation of assembled holoenzymes composed of regulatory D-type cyclins and their catalytic partner, cyclin-dependent kinase 4 (cdk4), is rate limiting for progression through the G1 phase of the cell cycle in mammalian fibroblasts. Both the synthesis and assembly of D-type cyclins and cdk4 depend upon serum s...

journal_title：Molecular and cellular biology

authors： Kato JY,Matsuoka M,Strom DK,Sherr CJ

更新日期：1994-04-01 00:00:00

abstract：:The interleukin-2 (IL-2) receptor (IL-2R) consists of three distinct subunits (alpha, beta, and gamma c) and regulates proliferation of T lymphocytes. Intracellular signalling results from ligand-mediated heterodimerization of the cytoplasmic domains of the beta and gamma c chains. To identify the residues of gamma c ...

journal_title：Molecular and cellular biology

authors： Nelson BH,Lord JD,Greenberg PD

更新日期：1996-01-01 00:00:00

abstract：:A protein that binds specifically to Saccharomyces cerevisiae centromere DNA element I was purified on the basis of a nitrocellulose filter-binding assay. This protein, termed centromere-binding protein 1 (CP1), was heat stable and renaturable from sodium dodecyl sulfate (SDS), and assays of eluates from SDS gels indi...

journal_title：Molecular and cellular biology

authors： Bram RJ,Kornberg RD

更新日期：1987-01-01 00:00:00

abstract：:SCF complexes are E3 ubiquitin-protein ligases that mediate degradation of regulatory and signaling proteins and control G1/S cell cycle progression by degradation of G1 cyclins and the cyclin-dependent kinase inhibitor, Sic1. Interchangeable F-box proteins bind the core SCF components; each recruits a specific subset...

journal_title：Molecular and cellular biology

authors： Ivantsiv Y,Kaplun L,Tzirkin-Goldin R,Shabek N,Raveh D

更新日期：2006-03-01 00:00:00

abstract：:We have characterized the mechanism by which coactivator p300 facilitates transcriptional activation mediated by the heterodimer of thyroid hormone (T3) receptor and 9-cis retinoid acid receptor (TR-RXR) in the context of chromatin. We demonstrate that, while p300 can enhance the transcriptional activation mediated by...

journal_title：Molecular and cellular biology

authors： Li J,O'Malley BW,Wong J

更新日期：2000-03-01 00:00:00

abstract：:Pseudo-exons are intronic sequences that are flanked by apparent consensus splice sites but that are not observed in spliced mRNAs. Pseudo-exons are often difficult to activate by mutation and have typically been viewed as a conceptual challenge to our understanding of how the spliceosome discriminates between authent...

journal_title：Molecular and cellular biology

authors： Grellscheid SN,Smith CW

更新日期：2006-03-01 00:00:00

abstract：:Homologous recombination is now routinely used in mammalian cells to replace endogenous chromosomal sequences with transferred DNA. Vectors for this purpose are traditionally constructed so that the replacement segment is flanked on both sides by DNA sequences which are identical to sequences in the chromosomal target...

journal_title：Molecular and cellular biology

authors： Berinstein N,Pennell N,Ottaway CA,Shulman MJ

更新日期：1992-01-01 00:00:00

abstract：:Activins and other members of the transforming growth factor beta family play a critical role in morphological changes of the epidermis that require epithelial cell movement. We investigated the molecular pathways in the transmission of activin signals that lead to actin reorganization and epithelial cell migration. W...

journal_title：Molecular and cellular biology

authors： Zhang L,Deng M,Parthasarathy R,Wang L,Mongan M,Molkentin JD,Zheng Y,Xia Y

更新日期：2005-01-01 00:00:00

abstract：:The neutral/neutral two-dimensional (2-D) gel replicon mapping technique has been used to great advantage to localize and characterize origins of replication. Interestingly, many yeast origins display a composite pattern consisting of both a bubble arc and a single-fork arc. Moreover, in every instance in which neutra...

journal_title：Molecular and cellular biology

authors： Kalejta RF,Hamlin JL

更新日期：1996-09-01 00:00:00

abstract：:In eukaryotic cells, calcium entry across the cell surface activates nuclear gene expression, a process critically important for cell growth and differentiation, learning, and memory and immune cell functions. In immune cells, calcium entry occurs through store-operated Ca(2+) release-activated Ca(2+) (CRAC) channels,...

journal_title：Molecular and cellular biology

authors： Yeh YC,Parekh AB

更新日期：2015-04-01 00:00:00

abstract：:Transcriptional coactivators play a crucial role in gene expression by communicating between regulatory factors and the basal transcription machinery. The coactivator multiprotein bridging factor 1 (MBF1) was originally identified as a bridging molecule that connects the Drosophila nuclear receptor FTZ-F1 and TATA-bin...

journal_title：Molecular and cellular biology

authors： Takemaru K,Harashima S,Ueda H,Hirose S

更新日期：1998-09-01 00:00:00