Sandbox Reserved 1652: Difference between revisions

From Proteopedia
Jump to navigationJump to search
No edit summary
No edit summary
Line 55: Line 55:
However, the orientation of <scene name='86/868185/L515/1'>L515</scene> and <scene name='86/868185/M547/1'>M547</scene> makes this region of the vanilloid pocket narrow, which considerably limits the nature of the fragments tolerated.<ref name="Understanding TRPV1 activation by ligands: Insights from the binding modes of capsaicin and resiniferatoxin"/>
However, the orientation of <scene name='86/868185/L515/1'>L515</scene> and <scene name='86/868185/M547/1'>M547</scene> makes this region of the vanilloid pocket narrow, which considerably limits the nature of the fragments tolerated.<ref name="Understanding TRPV1 activation by ligands: Insights from the binding modes of capsaicin and resiniferatoxin"/>


The aromatic part of resiniferatoxin is located deeper in the sub-pocket near <scene name='86/868185/Y511/2'>Y511</scene> and is oriented almost parallel to the aromatic side chain of <scene name='86/868185/Y511/2'>Y511</scene>, so it establishes a strong interaction π-π. The aromatic hydroxyl and methoxy groups of the RTX form strong hydrogen bonds with <scene name='86/868185/E570/2'>E570</scene>, <scene name='86/868185/R557/1'>R557</scene> and <scene name='86/868185/S512/1'>S512</scene>. The ester group is linked to <scene name='86/868185/Y511/2'>Y511</scene> and <scene name='86/868185/T550/2'>T550</scene> by hydrogen bonds.<ref name="Understanding TRPV1 activation by ligands: Insights from the binding modes of capsaicin and resiniferatoxin">
The aromatic part of resiniferatoxin is located deeper in the sub-pocket near <scene name='86/868185/Y511/2'>Y511</scene> and is oriented almost parallel to the aromatic side chain of <scene name='86/868185/Y511/2'>Y511</scene>, so it establishes a strong interaction π-π. The aromatic hydroxyl and methoxy groups of the RTX form strong hydrogen bonds with <scene name='86/868185/E570/2'>E570</scene>, <scene name='86/868185/R557/1'>R557</scene> and <scene name='86/868185/S512/1'>S512</scene>. The ester group is linked to <scene name='86/868185/Y511/2'>Y511</scene> and <scene name='86/868185/T550/2'>T550</scene> by hydrogen bonds.
 
=== Regulation ===
=== Regulation ===
====Sensitization====
====Sensitization====
Line 75: Line 74:
Many laboratories are conducting clinical studies on oral TRPV1 antagonists: GlaxoSmithKline, Amgen, Merk-Neurogen, Abbot, Eli-Lilly-Glenmark, AstraZeneca and Japan Tobacco. The major problem with these pain relievers is the [https://en.wikipedia.org/wiki/Hyperthermia hyperthermia] generated in humans by AMG517 (Amgen lab) and ABT-102 (Abbott lab). These effects caused these studies to be stopped in phase I.<ref name="TRPV1 dans les neuropathies douloureuses - Des modèles animaux aux perspectives thérapeutiques"/>
Many laboratories are conducting clinical studies on oral TRPV1 antagonists: GlaxoSmithKline, Amgen, Merk-Neurogen, Abbot, Eli-Lilly-Glenmark, AstraZeneca and Japan Tobacco. The major problem with these pain relievers is the [https://en.wikipedia.org/wiki/Hyperthermia hyperthermia] generated in humans by AMG517 (Amgen lab) and ABT-102 (Abbott lab). These effects caused these studies to be stopped in phase I.<ref name="TRPV1 dans les neuropathies douloureuses - Des modèles animaux aux perspectives thérapeutiques"/>


'''Phosphorylation''' of the TRPV1 receptor leads to its sensitization. Phosphorylations occurs on multiple phosphorylation sites at both N-terminal and C-terminal sites of TRPV1 by [https://en.wikipedia.org/wiki/Kinase kinases]. Phosphorylations are either caused by '''PKC''' (IP3 signalling), by '''PKA''' (AMPc signalling) or by '''CamKII'''.<ref>K. W. Ho, N. J. Ward, et D. J. Calkins, « TRPV1: a stress response protein in the central nervous system », Am. J. Neurodegener. Dis., vol. 1, no 1, p. 1‑14, avr. 2012.</ref><ref name="Integrating TRPV1 Receptor Function with Capsaicin Psychophysics">
 


</StructureSection>
</StructureSection>
== References ==
== References ==
<references/>
<references/>