50 results about "Ligase activity" patented technology

Provided herein are compositions, systems, and methods employing hyper-thermostable lysine-mutant ssDNA / RNA ligases that possesses both ssRNA ligase and ssDNA ligase activity. In certain embodiments,such hyper-thermostable lysine-mutant ssDNA / RNA ligases are used to ligate an first single stranded nucleic acid sequence with a 5' adenylated end to a second single stranded nucleic acid sequence (e.g., at a temperature of at least 75 DEG C) to form a ligated nucleic acid sequence. In further embodiments, the ligated nucleic acid sequence is sequenced.

The present invention generally relates to compounds and compositions useful for the modulation of ligase activity. The invention further relates to Compounds of the Invention, compositions thereof, and methods for treating or preventing cancer, a neoplastic disorder, acute or chronic renal failure, an inflammatory disorder, an immune disorder, a cardiovascular disease, an effect of aging or an infectious disease comprising administering an effective amount of a Compound of the Invention. The invention further relates to the use of a Compound of the Invention as a preservative of a cell, blood, tissue or an organ or as an agent to modulate stem cells.

The present invention describes methods of molecular diagnosis of a concrete form of a-synucleinopathy, the dementia with Lewy bodies (DLB), associated to the levels of ubiquitin carboxy-terminal hydrolase L1 (UCH-L1) or the alteration of its ubiquityl-ligase activity. It also refers to the use of compounds that permit the modification of the UCH-L1 levels or of the enzymatic activity of UCH-L1. This invention has application in the diagnosis and treatment of patients suffering from DLB.

The present invention generally relates to compounds and compositions useful for the modulation of ligase activity. The invention further relates to Compounds of the Invention, compositions thereof, and methods for treating or preventing cancer, a neoplastic disorder, acute or chronic renal failure, an inflammatory disorder, an immune disorder, a cardiovascular disease, an effect of aging or an infectious disease comprising administering an effective amount of a Compound of the Invention. The invention further relates to the use of a Compound of the Invention as a preservative of a cell, blood, tissue or an organ or as an agent to modulate stem cells.

A method of detecting a ligase expressing micro-organism in a sample comprises steps of treating the sample under conditions that inhibit the activity of ATP-dependent ligase from mammalian cells but which do not inhibit the activity of the microbial ligases, contacting the sample or a portion of the sample with a nucleic acid molecule which acts as a substrate for ligase activity in the sample, incubating the thus contacted sample under conditions suitable for ligase activity; and specifically determining the presence and / or the amount of a ligated nucleic acid molecule resulting from the action of the ligase on the substrate nucleic acid molecule to indicate the presence of the ligase expressing micro-organism. The micro-organism may be a fungus or a bacterium or both. High pH conditions may be employed to inactivate mammalian ligases. Related kits are described.

The present invention relates to compositions and methods for disease treatment and prevention through administration of a live attenuated composition. In particular, the present invention provides compositions and methods for the treatment and prevention of urinary tract infection by administration of a live attenuated compositions lacking O-antigen ligase activity.

More than 2% of adults harbor a pancreatic cyst, a subset of which progress to invasive lesions with lethal consequences. To assess the genomic landscapes of neoplastic cysts of the pancreas, we determined the exomic sequences of DNA from the neoplastic epithelium of eight surgically resected cysts of each of the major neoplastic cyst types: serous cystadenomas (SCAs), intraductal papillary mucinous neoplasms (IPMNs), mucinous cystic neoplasms (MCNs) and solid pseudo-papillary neoplasms (SPNs). SPNs are low-grade malignancies, and IPMNs and MCNs, but not SCAs, have the capacity to progress to cancer. We found that SCAs, IPMNs, MCNs, and SPNs contained 10=4.6, 27=12, 16=7.6, and 2.9=2.1 somatic mutations per tumor, respectively. Among the mutations identified, E3 ubiquitin ligase components were of particular note. Four of the eight SCAs contained mutations of VHL, a key component of the VHL ubiquitin ligase complex that has previously been associated both with renal cell carcinomas, SCAs, and other neoplasms. Six of the eight IPMNs and three of the eight MCNs harbored mutations of RNF43, a gene coding for a protein with intrinsic E3 ubiquitin ligase activity that has not previously been found to be genetically altered in any human cancer. The preponderance of inactivating mutations in RNF43 unequivocally establish it as a suppressor of both IPMNs and MCNs. SPNs contained remarkably few genetic alterations, but always contained mutations of CTNNB1, previously demonstrated to inhibit degradation of the encoded protein (β-catenin) by E3 ubiquitin ligases. These results highlight the essential role of ubiquitin ligases in these neoplasms and have important implications for the diagnosis and treatment of patients with cystic tumors.