Sandbox Reserved 1722: Difference between revisions

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[[Image:MP.PNG|~~425px~~|thumb|'''Figure 1''':MRGPRX2 in the cellular membrane. <ref name="Cao"/>]]

[[Image:MP.PNG|350px|thumb|'''Figure 1''':MRGPRX2 in the cellular membrane. <ref name="Cao"/>]]

== G-Protein Coupled Receptors ==

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===== ''Disulfide bonds'' =====

In common Class A GPCRs the disulfide bond associated with the initiation of signal transduction is located on the extracellular domain of the 7 transmembrane helices. <ref name="Zhang">PMID: 26467290</ref> The <scene name='90/~~904328~~/~~B2ardisulfidebond1_pt_2~~/1'>disulfide bond</scene> ~~of β2AR~~, a well studied Class A GPCR, occurs between transmembrane three (TM3) C106 and extracellular loop (EL) C191. This loop crosses through the middle of the extracellular domain, creating a barrier for bulkier substrates. In MRGPRX2, the <scene name='90/904328/7tm_domain_pt_5/1'>disulfide bond</scene> is located between (TM4) C168 and (TM5) C180. This is a TM to TM disulfide bond as compared to a TM to EL disulfide bond seen in typical Class A GPCRs. This lack of interaction with the extracellular loop seen in MRGPRX2 causes the extracellular loop to flip on top of the TM4 and TM5 resulting in an open space for larger substrates to be able to interact with the receptor.

In common Class A GPCRs the disulfide bond associated with the initiation of signal transduction is located on the extracellular domain of the 7 transmembrane helices. <ref name="Zhang">PMID: 26467290</ref> The <scene name='90/904327/B2ardisulfidebond1_pt_3/1'>disulfide bond of β2AR </scene>, a well studied Class A GPCR, occurs between transmembrane three (TM3) C106 and extracellular loop (EL) C191. This loop crosses through the middle of the extracellular domain, creating a barrier for bulkier substrates. In MRGPRX2, the <scene name='90/904328/7tm_domain_pt_5/1'>disulfide bond</scene> is located between (TM4) C168 and (TM5) C180. This is a TM to TM disulfide bond as compared to a TM to EL disulfide bond seen in typical Class A GPCRs. This lack of interaction with the extracellular loop seen in MRGPRX2 causes the extracellular loop to flip on top of the TM4 and TM5 resulting in an open space for larger substrates to be able to interact with the receptor.

===== ''PIF Motif'' =====

Sandbox Reserved 1722: Difference between revisions

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@@ Line 3: / Line 3: @@
 <StructureSection load='' size='350' frame='true' side='right' caption='Structure of MRGPRX2 with transmembrane helices shown in blue, Gαq shown in purple, Gβ1 shown in yellow, and Gγ2 shown in pink (PDB entry [https://www.rcsb.org/structure/7S8L 7S8L])' scene='90/904327/Overviewfrontpage/1'>
-[[Image:MP.PNG|425px|thumb|'''Figure 1''':MRGPRX2 in the cellular membrane. <ref name="Cao"/>]]
+[[Image:MP.PNG|350px|thumb|'''Figure 1''':MRGPRX2 in the cellular membrane. <ref name="Cao"/>]]
 == G-Protein Coupled Receptors ==
@@ Line 26: / Line 26: @@
 ===== ''Disulfide bonds'' =====
-In common Class A GPCRs the disulfide bond associated with the initiation of signal transduction is located on the extracellular domain of the 7 transmembrane helices. <ref name="Zhang">PMID: 26467290</ref> The <scene name='90/904328/B2ardisulfidebond1_pt_2/1'>disulfide bond</scene> of β2AR, a well studied Class A GPCR, occurs between transmembrane three (TM3) C106 and extracellular loop (EL) C191. This loop crosses through the middle of the extracellular domain, creating a barrier for bulkier substrates. In MRGPRX2, the <scene name='90/904328/7tm_domain_pt_5/1'>disulfide bond</scene> is located between (TM4) C168 and (TM5) C180. This is a TM to TM disulfide bond as compared to a TM to EL disulfide bond seen in typical Class A GPCRs. This lack of interaction with the extracellular loop seen in MRGPRX2 causes the extracellular loop to flip on top of the TM4 and TM5 resulting in an open space for larger substrates to be able to interact with the receptor.
+In common Class A GPCRs the disulfide bond associated with the initiation of signal transduction is located on the extracellular domain of the 7 transmembrane helices. <ref name="Zhang">PMID: 26467290</ref> The <scene name='90/904327/B2ardisulfidebond1_pt_3/1'>disulfide bond of β2AR </scene>, a well studied Class A GPCR, occurs between transmembrane three (TM3) C106 and extracellular loop (EL) C191. This loop crosses through the middle of the extracellular domain, creating a barrier for bulkier substrates. In MRGPRX2, the <scene name='90/904328/7tm_domain_pt_5/1'>disulfide bond</scene> is located between (TM4) C168 and (TM5) C180. This is a TM to TM disulfide bond as compared to a TM to EL disulfide bond seen in typical Class A GPCRs. This lack of interaction with the extracellular loop seen in MRGPRX2 causes the extracellular loop to flip on top of the TM4 and TM5 resulting in an open space for larger substrates to be able to interact with the receptor.
 ===== ''PIF Motif'' =====