摘要:
Devices, systems and methods are disclosed for determining an electromagnetic signature for authenticating a device, a user, and/or a location. In exemplary embodiments, a magnetometer captures an electromagnetic signature which is then compared with one or more authorized electromagnetic signatures. If the electromagnetic signature matches an authorized electromagnetic signature, then access is granted. The magnetometer is integrated into a communication device having a processor and a logic. The magnetometer captures an electromagnetic signature of a surrounding environment and detects motion of the communication device through the captured electromagnetic signature. The logic on the communication device locks or unlocks features of the device based upon the captured electromagnetic signature. In further embodiments of the subject disclosure, the magnetometer is in communication with a server which authenticates a user or communication device to provide access to a remote location.
摘要:
Devices, systems and methods are disclosed for determining an electromagnetic signature for authenticating a device, a user, and/or a location. In exemplary embodiments, a magnetometer captures an electromagnetic signature which is then compared with one or more authorized electromagnetic signatures. If the electromagnetic signature matches an authorized electromagnetic signature, then access is granted. The magnetometer is integrated into a communication device having a processor and a logic. The magnetometer captures an electromagnetic signature of a surrounding environment and detects motion of the communication device through the captured electromagnetic signature. The logic on the communication device locks or unlocks features of the device based upon the captured electromagnetic signature. In further embodiments of the subject disclosure, the magnetometer is in communication with a server which authenticates a user or communication device to provide access to a remote location.
摘要:
Wireless devices in proximity are securely paired with one another autonomously by generating a common cryptographic key directly from a time-varying wireless environment shared among the wireless devices. The shared key can be used by the wireless devices to authenticate each wireless device's physical proximity and then to facilitate confidential communication between the wireless devices. The algorithm used to create the shared key is secure against a computationally unbounded adversary and its computational complexity is linear in the size of the shared key.
摘要:
Screening assays that allow for the identification of agents that modulate the activity of the arginylation branch of the N-end rule pathway are provided. Also provided are method of using an agent that modulate the activity of the arginylation branch of the N-end rule pathway to increase or decrease protein degradation in a cell, and to modulate physiologic and pathologic associated with N-end rule pathway mediated arginylation.
摘要:
The disclosure relates to a generic class of ubiquitin-specific proteases which specifically cleave at the C-terminus of the ubiquitin moiety in a ubiquitin fusion protein irrespective of the size of the ubiquitin fusion protein. More specifically, the disclosure relates to ubiquitin-specific proteases of this class which have been isolated from a cell. The disclosure also relates to isolated DNA sequences encoding the proteases of this class.
摘要:
Methods of designing or modifying protein structure at the protein or genetic level to produce specified amino-termini in vivo or in vitro are described. The methods can be used to alter the metabolic stability and other properties of the protein or, alternatively, to artificially generate authentic amino-termini in proteins produced through artificial means. The methods are based upon the introduction of the use of artificial ubiquitin-protein fusions, and the discovery that the in vivo half-life of a protein is a function of the amino-terminal amino acid of the protein.
摘要:
Disclosed here is a nucleic acid sequence encoding a recognition component of the N-end rule pathway. This nucleic acid sequence is characterized by the ability to specifically hybridize to the nucleic acid sequence of SEQ ID NO 1 under stringent hybridization conditions. Such conditions are defined below. Also disclosed is a nucleic acid sequence encoding a recognition component of the N-end rule pathway which is characterized by the ability to specifically hybridize to the nucleic acid sequence of SEQ ID NO 2 under stringent hybridization conditions. Also disclosed are DNA expression vectors containing nucleic acid sequences of the type described above, as well as cells transformed with such expression vectors. Further disclosed are applications for the compositions described above.
摘要翻译:这里公开了编码N末端规则途径的识别成分的核酸序列。 该核酸序列的特征在于在严格杂交条件下与SEQ ID NO 1的核酸序列特异性杂交的能力。 这些条件定义如下。 还公开了编码N末端规则通路的识别组分的核酸序列,其特征在于在严格杂交条件下与SEQ ID NO 2的核酸序列特异性杂交的能力。 还公开了含有上述类型的核酸序列的DNA表达载体以及用这种表达载体转化的细胞。 进一步公开的是上述组合物的应用。
摘要:
The half-life of a Type I, II and III non-compartmentalized intracellular proteins is increased in living eukaryotic cells by contacting the cells with a regulator having an amino-terminal amino acid residue which is the same or similar to the amino-terminal residue of the intracellular protein. The regulator is a dipeptide, a small polypeptide or a carboxyl-terminal derivative of an amino acid. The dipeptide or small polypeptide has an N-terminal amino acid residue which is Arg, Lys or His for the Type I protein, Phe, Leu, Trp, Tyr or Ile for the Type II protein and Ala, Ser or Thr for the Type III protein. The carboxyl-terminal derivative of an amino acid may be an amino acid modified at its C-terminus by the addition of a group selected from methyl, ethyl, propyl, butyl and isobutyl. The amino acid modified is the N-terminal amino acid residue of the dipeptide or small polypeptide for the respective Type I, II and III proteins. Compositions may be formed containing the regulator for contacting with the cells. Increasing the half-life of intracellular protein with the regulator may be used for treating diseases resulting from an abnormal breakdown of a desired protein, and for enhancing in vivo production of a desired protein.
摘要:
The N-degron is an intracellular degradation signal whose essential determinant is a specific, destabilizing, N-terminal amino acid residue. A set of N-degrons containing different destabilizing residues is manifested as the N-end rule, which relates the in vivo half-life of a protein to the identity of its N-terminal amino acid residue. Disclosed herein is a heat-inducible N-degron module. A heat-inducible N-degron module is a protein or peptide bearing a destabilizing N-terminal amino acid residue which becomes a substrate of the N-end rule pathway only at a temperature high enough to result in at least partial unfolding of the protein. At this elevated (nonpermissive) temperature, the heat-inducible N-degron module (and any protein or peptide attached at its C-terminus) is rapidly degraded in a cell in which the N-end rule pathway is operative. Also disclosed are DNA and protein fusion constructs, methods for screening for additional heat-inducible N-degron modules and methods for using the disclosed heat-inducible N-degron modules.
摘要:
Disclosed are novel compositions and methods useful for studying interactions between proteins. An N-terminal subdomain and a C-terminal subdomain of ubiquitin are linked to a pair of proteins or peptides to be examined for their ability to interact. When contacted with one another, a quasi-native ubiquitin moiety is reconstituted provided that the protein or peptide pair do, in fact, interact (bind) with one another. The quasi-native ubiquitin moiety is recognized and cleaved by ubiquitin-specific proteases after the last residue of ubiquitin. The cleavage at the quasi-native ubiquitin moiety within a linear protein fusion is the indication of interaction between the protein or peptide pair.