If I increase the final concentration of my SYPRO Orange or SYPRO Red staining solution above 1X, can I increase the signal of my stained proteins?
No. Dye concentrations higher than 1X do not give better detection. Instead, background fluorescence increases and, as the dye concentration increases, the dye becomes self-quenching and the signal actually decreases.
LXXLL-related motifs in Dax-1 have target specificity for the orphan nuclear receptors Ad4BP/SF-1 and LRH-1.
Authors:Suzuki T, Kasahara M, Yoshioka H, Morohashi K, Umesono K
Journal:Mol Cell Biol
PubMed ID:12482977
The orphan receptor Ad4BP/SF-1 (NR5A1) is a constitutive activator, and its activity is repressed by another orphan receptor, Dax-1 (NR0B1). In the present study, we investigated the molecular mechanisms underlying this repression by Dax-1. Yeast two-hybrid and transient-transfection assays confirmed the necessity of three LXXLL-related motifs in Dax-1 for interaction ... More
Translational regulation of prostaglandin endoperoxide H synthase-1 mRNA in megakaryocytic MEG-01 cells. Specific protein binding to a conserved 20-nucleotide CIS element in the 3'-untranslated region.
Authors:Duquette M, Laneuville O
Journal:J Biol Chem
PubMed ID:12237309
Prostaglandin endoperoxide H synthase-1 (PGHS-1) is an abundant enzyme in platelets, where it plays a key role in the cascade of prostanoid formation. In platelets, the primary site of PGHS-1 synthesis is in precursor megakaryocytic cells. We have previously shown that in megakaryocytic MEG-01 cells, TPA induces an increase of ... More
Type I collagen is thermally unstable at body temperature.
Authors:Leikina E, Mertts MV, Kuznetsova N, Leikin S
Journal:Proc Natl Acad Sci U S A
PubMed ID:11805290
Molecular characterization of Saccharomyces cerevisiae TFIID.
Authors:Sanders SL, Garbett KA, Weil PA
Journal:Mol Cell Biol
PubMed ID:12138208
'We previously defined Saccharomyces cerevisiae TFIID as a 15-subunit complex comprised of the TATA binding protein (TBP) and 14 distinct TBP-associated factors (TAFs). In this report we give a detailed biochemical characterization of this general transcription factor. We have shown that yeast TFIID efficiently mediates both basal and activator-dependent transcription ... More
Mechanism of calcium-independent synaptotagmin binding to target SNAREs.
Authors:Rickman C, Davletov B
Journal:J Biol Chem
PubMed ID:12496268
'Synaptic vesicle exocytosis requires three SNARE (soluble N-ethylmaleimide-sensitive-factor attachment protein receptor) proteins: syntaxin and SNAP-25 on the plasma membrane (t-SNAREs) and synaptobrevin/VAMP on the synaptic vesicles (v-SNARE). Vesicular synaptotagmin 1 is essential for fast synchronous SNARE-mediated exocytosis and interacts with the SNAREs in brain material. To uncover the step at ... More