Munc13-4 is a GTP-Rab27-binding protein regulating dense core granule secretion in platelets.
Authors:Shirakawa R, Higashi T, Tabuchi A, Yoshioka A, Nishioka H, Fukuda M, Kita T, Horiuchi H,
Journal:J Biol Chem
PubMed ID:14699162
'Platelets store self-agonists such as ADP and serotonin in dense core granules. Although exocytosis of these granules is crucial for hemostasis and thrombosis, the underlying mechanism is not fully understood. Here, we show that incubation of permeabilized platelets with unprenylated active mutant Rab27A-Q78L, wild type Rab27A, and Rab27B inhibited the ... More
Crystal structure of Thermotoga maritima alpha-L-fucosidase. Insights into the catalytic mechanism and the molecular basis for fucosidosis.
Authors:Sulzenbacher G, Bignon C, Nishimura T, Tarling CA, Withers SG, Henrissat B, Bourne Y,
Journal:J Biol Chem
PubMed ID:14715651
'Fucosylated glycoconjugates are involved in numerous biological events, and alpha-l-fucosidases, the enzymes responsible for their processing, are therefore of crucial importance. Deficiency in alpha-l-fucosidase activity is associated with fucosidosis, a lysosomal storage disorder characterized by rapid neurodegeneration, resulting in severe mental and motor deterioration. To gain insight into alpha-l-fucosidase function ... More
The oncoprotein Tax binds the SRC-1-interacting domain of CBP/p300 to mediate transcriptional activation.
Authors:Scoggin KE, Ulloa A, Nyborg JK,
Journal:Mol Cell Biol
PubMed ID:11463834
'Oncogenesis associated with human T-cell leukemia virus (HTLV) infection is directly linked to the virally encoded transcription factor Tax. To activate HTLV-1 transcription Tax interacts with the cellular protein CREB and the pleiotropic coactivators CBP and p300. While extensively studied, the molecular mechanisms of Tax transcription function and coactivator utilization ... More
Human DNA polymerase N (POLN) is a low fidelity enzyme capable of error-free bypass of 5S-thymine glycol.
Authors:Takata K, Shimizu T, Iwai S, Wood RD,
Journal:J Biol Chem
PubMed ID:16787914
'Human DNA polymerase N (POLN or pol nu) is the most recently discovered nuclear DNA polymerase in the human genome. It is an A-family DNA polymerase related to Escherichia coli pol I, human POLQ, and Drosophila Mus308. We report the first purification of the recombinant enzyme and examination of its ... More
Dual-tagging system for the affinity purification of mammalian protein complexes.
Authors:Giannone RJ, McDonald WH, Hurst GB, Huang Y, Wu J, Liu Y, Wang Y,
Journal:Biotechniques
PubMed ID:17907572
'Although affinity purification coupled with mass spectrometry (MS) provides a powerful tool to study protein-protein interactions, this strategy has encountered numerous difficulties when adapted to mammalian cells. Here we describe a Gateway-compatible dual-tag affinity purification system that integrates regulatable expression, tetracysteine motifs, and various combinations ofaffinity tags to facilitate the ... More