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2018 ; 19
(2
): ä Nephropedia Template TP
gab.com Text
Twit Text FOAVip
Twit Text #
English Wikipedia
How Do We Study the Dynamic Structure of Unstructured Proteins: A Case Study on
Nopp140 as an Example of a Large, Intrinsically Disordered Protein
#MMPMID29382046
Na JH
; Lee WK
; Yu YG
Int J Mol Sci
2018[Jan]; 19
(2
): ä PMID29382046
show ga
Intrinsically disordered proteins (IDPs) represent approximately 30% of the human
genome and play key roles in cell proliferation and cellular signaling by
modulating the function of target proteins via protein-protein interactions. In
addition, IDPs are involved in various human disorders, such as cancer,
neurodegenerative diseases, and amyloidosis. To understand the underlying
molecular mechanism of IDPs, it is important to study their structural features
during their interactions with target proteins. However, conventional biochemical
and biophysical methods for analyzing proteins, such as X-ray crystallography,
have difficulty in characterizing the features of IDPs because they lack an
ordered three-dimensional structure. Here, we present biochemical and biophysical
studies on nucleolar phosphoprotein 140 (Nopp140), which mostly consists of
disordered regions, during its interaction with casein kinase 2 (CK2), which
plays a central role in cell growth. Surface plasmon resonance and electron
paramagnetic resonance studies were performed to characterize the interaction
between Nopp140 and CK2. A single-molecule fluorescence resonance energy transfer
study revealed conformational change in Nopp140 during its interaction with CK2.
These studies on Nopp140 can provide a good model system for understanding the
molecular function of IDPs.
|*Molecular Dynamics Simulation
[MESH]
|Animals
[MESH]
|Casein Kinase II/metabolism
[MESH]
|Fluorescence Resonance Energy Transfer/methods
[MESH]