Biological Assembly 1  

 3D View: Structure | 1D-3D View | Electron Density | Validation Report | Ligand Interaction

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 3-mer - A1B1C1 Pseudo Symmetry: Asymmetric - C1 
Pseudo Stoichiometry: Hetero 3-mer - A2B1 

Biological assembly 1 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 96.64 kDa 
• Atom Count: 5770 
• Modelled Residue Count: 708 
• Deposited Residue Count: 831 
• Unique protein chains: 3

1TL7

Complex Of Gs- With The Catalytic Domains Of Mammalian Adenylyl Cyclase: Complex With 2'(3')-O-(N-methylanthraniloyl)-guanosine 5'-triphosphate and Mn

• PDB DOI: 10.2210/pdb1TL7/pdb

• Classification: LYASE
• Organism(s): Canis lupus familiaris, Rattus norvegicus, Bos taurus
• Expression System: Escherichia coli BL21
• Mutation(s): No 


• Deposited: 2004-06-09 Released: 2004-12-14 
• Deposition Author(s): Mou, T.C., Gille, A., Seifert, R.J., Sprang, S.R.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.80 Å
• R-Value Free: 0.298 
• R-Value Work: 0.254 
• R-Value Observed: 0.254 

Literature

Structural basis for the inhibition of mammalian membrane adenylyl cyclase by 2 '(3')-O-(N-Methylanthraniloyl)-guanosine 5 '-triphosphate.

Mou, T.C., Gille, A., Fancy, D.A., Seifert, R., Sprang, S.R.

(2005) J Biol Chem 280: 7253-7261

• PubMed: 15591060 
• DOI: 10.1074/jbc.M409076200
• Primary Citation of Related Structures:  
  1TL7, 1U0H


• PubMed Abstract: 
  

Membrane-bound mammalian adenylyl cyclase (mAC) catalyzes the synthesis of intracellular cyclic AMP from ATP and is activated by stimulatory G protein alpha subunits (Galpha(s)) and by forskolin (FSK). mACs are inhibited with high potency by 2 '(3')-O-(N-methylanthraniloyl) (MANT)-substituted nucleotides. In this study, the crystal structures of the complex between Galpha(s).GTPgammaS and the catalytic C1 and C2 domains from type V and type II mAC (VC1.IIC2), bound to FSK and either MANT-GTP.Mg(2+) or MANT-GTP.Mn(2+) have been determined. MANT-GTP coordinates two metal ions and occupies the same position in the catalytic site as P-site inhibitors and substrate analogs. However, the orientation of the guanine ring is reversed relative to that of the adenine ring. The MANT fluorophore resides in a hydrophobic pocket at the interface between the VC1 and IIC2 domains and prevents mAC from undergoing the "open" to "closed" domain rearrangement. The K(i) of MANT-GTP for inhibition of VC1.IIC2 is lower in the presence of mAC activators and lower in the presence of Mn(2+) compared with Mg(2+), indicating that the inhibitor binds more tightly to the catalytically most active form of the enzyme. Fluorescence resonance energy transfer-stimulated emission from the MANT fluorophore upon excitation of Trp-1020 in the MANT-binding pocket of IIC2 is also stronger in the presence of FSK. Mutational analysis of two non-conserved amino acids in the MANT-binding pocket suggests that residues outside of the binding site influence isoform selectivity toward MANT-GTP.

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Organizational Affiliation: 

Department of Biochemistry, Howard Hughes Medical Institute, The University of Texas Southwestern Medical, Dallas, Texas 75390-9050, USA.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Adenylate cyclase, type V	A	217	Canis lupus familiaris	Mutation(s): 0  Gene Names: Name=ADCY5, ADCY5 EC: 4.6.1.1
UniProt
Find proteins for P30803 (Canis lupus familiaris) Explore P30803  Go to UniProtKB:  P30803

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
Adenylate cyclase, type II	B	212	Rattus norvegicus	Mutation(s): 0  Gene Names: Name=Adcy2, Adcy2 EC: 4.6.1.1
UniProt
Find proteins for P26769 (Rattus norvegicus) Explore P26769  Go to UniProtKB:  P26769

Entity ID: 3
Molecule	Chains	Sequence Length	Organism	Details	Image
Guanine nucleotide-binding protein G(s), alpha subunit	C	402	Bos taurus	Mutation(s): 0  Gene Names: Name=GNAS, GNAS, GNAS1
UniProt
Find proteins for P04896 (Bos taurus) Explore P04896  Go to UniProtKB:  P04896

Small Molecules

Ligands 6 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
ONM	G [auth A]	3'-O-(N-METHYLANTHRANILOYL)-GUANOSINE-5'-TRIPHOSPHATE C18 H23 N6 O15 P3 DSPRYHPLXXUNHS-XNIJJKJLSA-N
GSP	J [auth C]	5'-GUANOSINE-DIPHOSPHATE-MONOTHIOPHOSPHATE C10 H16 N5 O13 P3 S XOFLBQFBSOEHOG-UUOKFMHZSA-N
FOK	F [auth A]	FORSKOLIN C22 H34 O7 OHCQJHSOBUTRHG-KGGHGJDLSA-N
MN	D [auth A], E [auth A]	MANGANESE (II) ION Mn WAEMQWOKJMHJLA-UHFFFAOYSA-N
CL	I [auth C]	CHLORIDE ION Cl VEXZGXHMUGYJMC-UHFFFAOYSA-M
MG	H [auth C]	MAGNESIUM ION Mg JLVVSXFLKOJNIY-UHFFFAOYSA-N

Binding Affinity Annotations
ID	Source	Binding Affinity
ONM	PDBBind:  1TL7	Ki: 12 (nM) from 1 assay(s)

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.80 Å
• R-Value Free: 0.298 
• R-Value Work: 0.254 
• R-Value Observed: 0.254 
• Space Group: P 2₁ 2₁ 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 118.23	α = 90
b = 133.6	β = 90
c = 70.35	γ = 90

Software Package:

Software Name	Purpose
CNS	refinement
HKL-2000	data reduction
SCALEPACK	data scaling
CNS	phasing

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2004-06-09 
• Released Date: 2004-12-14 
Deposition Author(s): Mou, T.C., Gille, A., Seifert, R.J., Sprang, S.R.

Revision History  

• Version 1.0: 2004-12-14
  Type: Initial release
  
• Version 1.1: 2008-04-30
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance