GPCRDB has a list of structures at
http://www.gpcr.org/7tm/updates?wicket:bookmarkablePage=:nl.ru.cmbi.mcsis.web.pages.proteinstructure.ProteinStructureOverviewPage

--opsin/rhodopsin

1u19 1l9h 1hzx 1f88 2i35

3cap  2.90
Park, J.H.,  Scheerer, P.,  Hofmann, K.P.,  Choe, H.-W.,  Ernst, O.P.
Crystal structure of the ligand-free G-protein-coupled receptor opsin
Nature	454, 183 - 187 (18 Jun 2008)
http://www.nature.com/nature/journal/v454/n7201/full/nature07063.html

4a4m constitutively active N2C, M257Y, D282C rhodopsin mutant
Deupi X, Edwards P, Singhal A, Nickle B, Oprian D, Schertler G, Standfuss J.
Stabilized G protein binding site in the structure of constitutively active metarhodopsin-II.
Proc Natl Acad Sci U S A. 2011 Dec 23;. [Epub ahead of print]

--beta1 adrenergic receptor

2vt4  2.70  cyanopindolol and stabilizing mutations
Warne T, Serrano-Vega MJ, Baker JG, Moukhametzianov R, Edwards PC, Henderson R,
Leslie AG, Tate CG, Schertler GF.
Structure of a beta(1)-adrenergic G-protein-coupled receptor.
Nature. 2008 454:486.
http://www.nature.com/nature/journal/vaop/ncurrent/full/nature07101.html

2ycw
2ycx
2ycy
2ycz
Moukhametzianov R, Warne T, Edwards PC, Serrano-Vega MJ, Leslie AG, Tate CG, Schertler GF.
Two distinct conformations of helix 6 observed in antagonist-bound structures of a beta1-adrenergic receptor.
Proc Natl Acad Sci U S A. 2011 May 17;108(20):8228-32.
http://www.pnas.org/content/108/20/8228.long

--beta2 adrenergic receptor

2rh1   2.40   lysozyme fusion
Cherezov V, Rosenbaum DM, Hanson MA, Rasmussen SG, Thian FS, Kobilka TS, Choi HJ, Kuhn P, Weis WI, Kobilka BK, Stevens RC.
High-resolution crystal structure of an engineered human beta2-adrenergic G protein-coupled receptor.
Science. 2007 Nov 23;318(5854):1258-65. 
http://www.sciencemag.org/cgi/content/full/318/5854/1258

3d4s  2.80  lysozyme fusion, cholesterol

2r4r  3.40  Fab complex

2r4s  3.40  Fab complex

3ny8
3ny9
3nya

3pds  3.50  lysozyme fusion, cholesterol
Structure and function of an irreversible agonist-β(2) adrenoceptor complex.
Rosenbaum DM, Zhang C, Lyons JA, Holl R, Aragao D, Arlow DH, Rasmussen SG, Choi HJ, Devree BT, Sunahara RK, Chae PS, Gellman SH, Dror RO, Shaw DE, Weis WI, Caffrey M, Gmeiner P, Kobilka BK.
Nature. 2011 Jan 13;469(7329):236-40.

3p0g 3.50 lysozyme fusion
Structure of a nanobody-stabilized active state of the β(2) adrenoceptor.
Rasmussen SG, Choi HJ, Fung JJ, Pardon E, Casarosa P, Chae PS, Devree BT, Rosenbaum DM, Thian FS, Kobilka TS, Schnapp A, Konetzki I, Sunahara RK, Gellman SH, Pautsch A, Steyaert J, Weis WI, Kobilka BK.
Nature. 2011 Jan 13;469(7329):175-80

3sn6
Crystal structure of the β2 adrenergic receptor-Gs protein complex.
Rasmussen SG, DeVree BT, Zou Y, Kruse AC, Chung KY, Kobilka TS, Thian FS, Chae PS, Pardon E, Calinski D, Mathiesen JM, Shah ST, Lyons JA, Caffrey M, Gellman SH, Steyaert J, Skiniotis G, Weis WI, Sunahara RK, Kobilka BK.
Nature. 2011 Jul 19;477(7366):549-55. doi: 10.1038/nature10361.

--adenosine receptor

3eml  2.60  lysozyme fusion
Jaakola VP, Griffith MT, Hanson MA, Cherezov V, Chien EY, Lane JR, Ijzerman AP, Stevens RC.
The 2.6 Angstrom Crystal Structure of a Human A2A Adenosine Receptor Bound to an Antagonist.
Science. 2008 Nov 21;322(5905):1211-7.
http://www.sciencemag.org/cgi/content/abstract/1164772v1

3qak with conformationally selective agonist
Structure of an Agonist-Bound Human A2A Adenosine Receptor.
Xu F, Wu H, Katritch V, Han GW, Jacobson KA, Gao ZG, Cherezov V, Stevens RC.
Science. 2011 Apr 15;332(6027):322-327.

2ydo adenosine complex
2ydv NECA complex
Lebon G, Warne T, Edwards PC, Bennett K, Langmead CJ, Leslie AG, Tate CG.
Agonist-bound adenosine A(2A) receptor structures reveal common features of GPCR activation.
Nature. 2011 May 18;474(7352):521-5. doi: 10.1038/nature10136.

--dopamine D3 receptor

3pbl lysozyme fusion
Structure of the human dopamine D3 receptor in complex with a D2/D3 selective antagonist.
Chien EY, Liu W, Zhao Q, Katritch V, Han GW, Hanson MA, Shi L, Newman AH, Javitch JA, Cherezov V, Stevens RC.
Science. 2010 Nov 19;330(6007):1091-5.

--mu opioid receptor

4dkl 2.80 lysozyme fusion
Manglik A, Kruse AC, Kobilka TS, Thian FS, Mathiesen JM, Sunahara RK, Pardo L, Weis WI, Kobilka BK, Granier S.
Crystal structure of the µ-opioid receptor bound to a morphinan antagonist.
Nature. 2012 Mar 21;. [Epub ahead of print]

--kappa opioid receptor

4djh 2.90 lysozyme fusion

--CXCR4 chemokine receptor

3odu
3oe0
3oe6
3oe8
3oe9
Structures of the CXCR4 chemokine GPCR with small-molecule and cyclic peptide antagonists.
Wu B, Chien EY, Mol CD, Fenalti G, Liu W, Katritch V, Abagyan R, Brooun A, Wells P, Bi FC, Hamel DJ, Kuhn P, Handel TM, Cherezov V, Stevens RC.
Science. 2010 Nov 19;330(6007):1066-71. 

--sphingosine 1-phosphate receptor

3v2w antagonist complex, lysozyme fusion
3v2y antagonist complex, lysozyme fusion
Crystal Structure of a Lipid G Protein–Coupled Receptor.
Hanson MA, Roth CB, et al.
Science 17 February 2012: 851-855.