Jumping genes can knock out DNA; alter human genome
...produce" by using RNA and a process called reverse transcription to make complementary DNA copies of themselves, as they integrate into other DNA sequences. "Of 37 transposable events in our study, four resulted in deletions of genetic material," says Nicolas Gilbert, Ph.D., a U-M post-doctoral fellow in human gen...Computational geneticists revisit a mystery in evolution
...s important in the development of most organisms - transcription factors, or proteins that regulate the expression of genes. In the model they developed, 10 genes each encode a protein that in principle is capable of regulating the expression of each of the other nine genes, as well as itself. To compare the compl...Researchers discover new insight into a common signaling pathway
... cytoplasm and into the nucleus, where they act as transcription factors to activate the expression of TGF- target genes. Dr. Lin and colleagues have determined that the conformation of the Smad3 protein specifies which members of the TGF- pathway it can interact with, and thereby regulates the progression of th...Generating genetic diversity in the nervous system
...NA sequence where RNA polymerase binds to initiate transcription of the gene into pre-mRNA). Once transcribed, the pre-mRNA transcript then predominantly undergoes an intramolecular reaction, known as "cis-splicing," whereby a variable exon is cut out and joined, or "spliced," to the constant region of that same p...Researchers produce motor neurons from embryonic stem cells
...ntiation by looking for the expression of specific transcription factors that define the identity of cells as spinal cord progenitor cells. "Retinoids will give you spinal cord identity, but that doesn't determine exactly which type of neuron emerges from these spinal cord progenitor cells," said Jessell. "And tha...Patients with serious kidney disorder produce natriuretic peptides at above average rates
... acid with a fluorescent dye, to look for specific transcription or localization of genes to specific chromosomes) was performed on five microns sections of formalin-fixed, paraffin-embedded biopsy tissue using digoxigenin oligonucleotide probes. The experimental protocol required that control subjects consume a ...Researchers discover molecular 'switch' that tells body to store or burn fat
...n in the levels of lipid metabolites that regulate transcription factors that control metabolism," says Friedman. "Transcription factors turn groups of genes on and off. A second possibility is that the properties of the cell membrane, which is composed largely of lipid, is altered," he adds. "A third possibility...New way found to see light through novel protein identified by Dartmouth geneticists
... is actually the photoreceptor protein. WC-1 is a transcription factor that partners with WC-2, and binds to DNA o...es, Dunlap explains. "This is the first case of a transcription factor that is itself a photo pigment and a transcription factor that contains both ability to turn ...Penn State College of Medicine researchers correct scientific theory about how gene switch works
...s frees up the activation site of GAL4p and allows transcription factors to latch on. In this way, GAL4p proteins turn on the genes and create the enzymes that break down galactose. Defects in the galactose pathway cause severe problems in both yeast and humans. Galactose is one of the substances produced when the...Researchers identify protein linked to tumor invasion
...ing on the actions of a group of proteins known as transcription factors, including NFAT (nuclear factor of activated T cells). NFAT, which is critical for efficient immune cell responses, was first identified in the cells of the immune system about 20 years ago. It subsequently became the target for cyclosporin ...Other highlights in the June 19 issue of JNCI
... expression resulted in constitutive activation of transcription factors and increased activity of certain protein kinases, which led to enhanced signal transduction and increased cell proliferation. Tumors in the K1 transgenic mice showed characteristics of a spindle-cell sarcomatoid tumor and a malignant plasmab...New cellular evolution theory rejects Darwinian assumptions
...ular information processing systems" translation, transcription and replication and he suggests that cellular evolution progressed in that order, with translation leading the way. The pivotal development in the evolution of modern protein-based cells, Woese said, was the invention of symbolic representation on t...Fried green tomatoes: Transgenic tomatoes reveal critical component of thermotolerance
...omato heat stress response. HsfA1 is a heat stress transcription factor that activates the expression of genes that...ed that although each of the 17 tomato heat stress transcription factors identified thus far, may have a specific function, HsfA1 is the most important, playing an d...Three-D images shed light on first steps of RNA synthesis
...niversity scientists illuminate how the process of transcription begins in bacteria. Understanding this process may...esize RNA from a DNA template, but cannot initiate transcription by itself. Initiation requires another protein, the sigma subunit, which binds core to form the holo...Can we enlist substitute genes to fight muscular dystrophy
... cellular mechanisms that promote and regulate the transcription of the utrophin gene into protein. Their findings ...trated how heregulin ultimately switches on Sp1, a transcription factor, which then binds to a specific region of the DNA that drives the utrophin gene. Once attache...Parasite or partner? Study suggests new role for junk DNA
...eproduce by using RNA and a process called reverse transcription to make complementary DNA copies of themselves, which can jump into other DNA sequences. Normally, L1s use an enzyme called endonuclease to cut the genetic DNA and create a space, so they can plug themselves into the genome. We knew about the endonuc...UCSF finding offers provocative insight into what drives cancer
..., such as the cyclin dependent kinases and the E2F transcription factors, share with the Myc protein the ability to elicit complex tumor characteristics such as angiogenesis, invasion and metastasis. However, he says, even when a tumor is driven by mutations in genes other than c-myc, it remains likely that c-Myc ...Setting the stage for limb development
...ntennae. Members of the Dll/Dlx gene family encode transcription factors: DNA-binding proteins that regulate the expression of other genes. Dll/Dlx family members are involved in the limb formation of a variety of vertebrate species. This work by Dr. Lufkins research team extends the known range of Dlx function in...Adenovirus genes that thwart apoptosis pathways may promote viral latency
... genes within a section of the virus called the E3 transcription unit that interfere with apoptosis signaling the natural pathway of cell death. In their studies of tonsil tissue, Dr. Gooding, along with graduate student Jeffrey Mahr and microbiologist Jeremy Boss, found that these genes might be activated by T ......ution of T-box genes, a group of genes that encode transcription factors regulating gene expression in embryogenesis, or the development of embryos. Simply put, T-box genes control when and where a particular gene is turned on (expressed) or turned off during the course of an animals development. The vast diver...