TY - JOUR
T1 - 1H, 15N, and 13C chemical shift assignments of the regulatory domain of human calcineurin
AU - Yadav, Dinesh K.
AU - Tata, Sri Ramya
AU - Hunt, John
AU - Cook, Erik C.
AU - Creamer, Trevor P.
AU - Fitzkee, Nicholas C.
N1 - Publisher Copyright:
© 2017, Springer Science+Business Media B.V.
PY - 2017/10/1
Y1 - 2017/10/1
N2 - Calcineurin (CaN) plays an important role in T-cell activation, cardiac system development and nervous system function. Previous studies have demonstrated that the regulatory domain (RD) of CaN binds calmodulin (CaM) towards the N-terminal end. Calcium-loaded CaM activates the serine/threonine phosphatase activity of CaN by binding to the RD, although the mechanistic details of this interaction remain unclear. It is thought that CaM binding at the RD displaces the auto-inhibitory domain (AID) from the active site of CaN, activating phosphatase activity. In the absence of calcium-loaded CaM, the RD is disordered, and binding of CaM induces folding in the RD. In order to provide mechanistic detail about the CaM–CaN interaction, we have undertaken an NMR study of the RD of CaN. Complete 13C, 15N and 1H assignments of the RD of CaN were obtained using solution NMR spectroscopy. The backbone of RD has been assigned using a combination of 13C-detected CON-IPAP experiments as well as traditional HNCO, HNCA, HNCOCA and HNCACB-based 3D NMR spectroscopy. A 15N-resolved TOCSY experiment has been used to assign Hα and Hβ chemical shifts.
AB - Calcineurin (CaN) plays an important role in T-cell activation, cardiac system development and nervous system function. Previous studies have demonstrated that the regulatory domain (RD) of CaN binds calmodulin (CaM) towards the N-terminal end. Calcium-loaded CaM activates the serine/threonine phosphatase activity of CaN by binding to the RD, although the mechanistic details of this interaction remain unclear. It is thought that CaM binding at the RD displaces the auto-inhibitory domain (AID) from the active site of CaN, activating phosphatase activity. In the absence of calcium-loaded CaM, the RD is disordered, and binding of CaM induces folding in the RD. In order to provide mechanistic detail about the CaM–CaN interaction, we have undertaken an NMR study of the RD of CaN. Complete 13C, 15N and 1H assignments of the RD of CaN were obtained using solution NMR spectroscopy. The backbone of RD has been assigned using a combination of 13C-detected CON-IPAP experiments as well as traditional HNCO, HNCA, HNCOCA and HNCACB-based 3D NMR spectroscopy. A 15N-resolved TOCSY experiment has been used to assign Hα and Hβ chemical shifts.
KW - Calcineurin
KW - Calmodulin Binding
KW - Intrinsically Disordered Protein
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U2 - 10.1007/s12104-017-9751-x
DO - 10.1007/s12104-017-9751-x
M3 - Article
C2 - 28803387
AN - SCOPUS:85027385089
SN - 1874-2718
VL - 11
SP - 215
EP - 219
JO - Biomolecular NMR Assignments
JF - Biomolecular NMR Assignments
IS - 2
ER -