Results 71 to 80 of about 18,296 (185)
eLife, 2019 The deamidase OspI from enteric bacteria Shigella flexneri deamidates a glutamine residue in the host ubiquitin-conjugating enzyme UBC13 and converts it to glutamate (Q100E).
Priyesh Mohanty +4 more
doaj +1 more source
Mass Spectrometry Reviews, EarlyView.ABSTRACT Top‐down proteomics (TDP) characterizes proteoforms in cells, tissues, and biofluids, in discovery mode and on a global scale, requiring analytical tools with high peak capacity for proteoform separation and high sensitivity for proteoform detection, given the extremely high proteoform complexity and wide proteoform concentration dynamic range.
Guijie Zhu +5 more
wiley +1 more source
Structural Analyses on the Deamidation of N-Terminal Asn in the Human N-Degron Pathway
Biomolecules, 2020 The N-degron pathway is a proteolytic system in which a single N-terminal amino acid acts as a determinant of protein degradation. Especially, degradation signaling of N-terminal asparagine (Nt-Asn) in eukaryotes is initiated from its deamidation by N ...
Joon Sung Park +8 more
doaj +1 more source
Deamidation Accelerates Amyloid Formation and Alters Amylin Fiber Structure
, 2016 Deamidation of asparagine and glutamine is the most common nonenzymatic, post-translational modification. Deamidation can influence the structure, stability, folding, and aggregation of proteins and has been proposed to play a role in amyloid formation ...
Peter Marek (2059756) +5 more
core +1 more source
Keeping It Native: Non‐Denaturing Approaches to Top‐Down Protein Mass Spectrometry
Mass Spectrometry Reviews, EarlyView.ABSTRACT Top‐down proteomics and top‐down mass spectrometry approaches provide direct characterization of proteoforms; the specific molecular forms of proteins, including post‐translational modifications, truncations, alternative splicing, and sequence variants.
Michael Xiao +3 more
wiley +1 more source
Evaluation of the Effect of Trypsin Digestion Buffers on Artificial Deamidation
, 2014 Nonenzymatic deamidation occurs readily under the condition of trypsin digestion, resulting in the identification of many artificial deamidation sites. To evaluate the effect of trypsin digestion buffers on artificial deamidation, we compared the three ...
Ren, Yan +9 more
core +1 more source
Molecules, 2016 The rates of deamidation reactions of asparagine (Asn) residues which occur spontaneously and nonenzymatically in peptides and proteins via the succinimide intermediate are known to be strongly dependent on the nature of the following residue on the ...
Ohgi Takahashi +2 more
doaj +1 more source
PROTEOMICS, EarlyView.ABSTRACT Triple‐negative breast cancer (TNBC) represents the most aggressive subtype with limited therapeutic options and the poorest clinical outcomes. Using high‐resolution nUPLC‐QTOF‐MS/MS, we performed comprehensive proteomic profiling of TNBC cell lines representing disease progression stages: HCC‐1937 (stage IIB), HCC‐1599 (stage IIIA), and MDA ...
Claudia Sissely Chaviano‐Montes de Oca +7 more
wiley +1 more source
Asparagine Deamidation: pH-Dependent Mechanism from Density Functional Theory
, 2016 Asparagine deamidation is a decisive event in chemotherapy-induced apoptosis and a major obstacle in the formulation of monoclonal antibodies. Despite the importance of deamidation, little is known about the elementary reactions involved.
Bernhardt L. Trout (195616) +1 more
core +1 more source
Rapid Communications in Mass Spectrometry, EarlyView.ABSTRACT Rationale Recent advances in high‐throughput molecular analyses of collagen peptides, especially ZooMS (Zooarchaeology by Mass Spectrometry), have permitted breakthroughs in the analysis of archaeological material that is highly fragmented, a factor that hinders morphological identification.
Pauline Raymond +8 more
wiley +1 more source