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You may include any references to papers as in: the use of JSmol in Proteopedia ^[1] or to the article describing Jmol ^[2] to the rescue.

Background

G-protein coupled receptors

Function

Structure

transmembrane protein

alpha helix

Class B structural components

As opposed to class A glucagon receptors which have a proline kink, in all secretin-like class B glucagon receptors there is a Glycine at position 393 in Helix VII which allows for a . This Glycine and therefore this helical bend is fully conserved in all secretin-like class B receptors and is an important part of the FQGxxVxxYCF motif.

Glu 406 Salt Bridges

Since there is no conservation of these residues in class A receptors these salt bridges are likely an important feature of secretin-like class B receptors.

Disulfide bond

As a part of the interface stabilization between helices VI, V, and III, a class B specific hydrogen bond occurs between N 318 of Helix V and L 242 of Helix III.

unique components to GPCR

An important interface stabilization interaction between helices I and VII occurs between Ser 152 of Helix I and Ser 390 of Helix VII. Due to their close proximity to one another, they form an important which serves to stabilize the structure of GCGR.

Clinical Relevance

clinical relevance

References

1. ↑ Hanson, R. M., Prilusky, J., Renjian, Z., Nakane, T. and Sussman, J. L. (2013), JSmol and the Next-Generation Web-Based Representation of 3D Molecular Structure as Applied to Proteopedia. Isr. J. Chem., 53:207-216. doi:http://dx.doi.org/10.1002/ijch.201300024
2. ↑ Herraez A. Biomolecules in the computer: Jmol to the rescue. Biochem Mol Biol Educ. 2006 Jul;34(4):255-61. doi: 10.1002/bmb.2006.494034042644. PMID:21638687 doi:10.1002/bmb.2006.494034042644