1TL7

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


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 

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This is version 1.2 of the entry. See complete history


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

  • 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 ...

    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.


    Organizational Affiliation

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



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Adenylate cyclase, type VA217Canis lupus familiarisMutation(s): 0 
Gene Names: Name=ADCY5ADCY5
EC: 4.6.1.1
UniProt
Find proteins for P30803 (Canis lupus familiaris)
Explore P30803 
Go to UniProtKB:  P30803
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP30803
Protein Feature View
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Adenylate cyclase, type IIB212Rattus norvegicusMutation(s): 0 
Gene Names: Name=Adcy2Adcy2
EC: 4.6.1.1
UniProt
Find proteins for P26769 (Rattus norvegicus)
Explore P26769 
Go to UniProtKB:  P26769
Entity Groups  
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UniProt GroupP26769
Protein Feature View
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  • Reference Sequence
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
Guanine nucleotide-binding protein G(s), alpha subunitC402Bos taurusMutation(s): 0 
Gene Names: Name=GNASGNASGNAS1
UniProt
Find proteins for P04896 (Bos taurus)
Explore P04896 
Go to UniProtKB:  P04896
Entity Groups  
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UniProt GroupP04896
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 6 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ONM
Query on ONM

Download Ideal Coordinates CCD File 
G [auth A]3'-O-(N-METHYLANTHRANILOYL)-GUANOSINE-5'-TRIPHOSPHATE
C18 H23 N6 O15 P3
DSPRYHPLXXUNHS-XNIJJKJLSA-N
 Ligand Interaction
GSP
Query on GSP

Download Ideal Coordinates CCD File 
J [auth C]5'-GUANOSINE-DIPHOSPHATE-MONOTHIOPHOSPHATE
C10 H16 N5 O13 P3 S
XOFLBQFBSOEHOG-UUOKFMHZSA-N
 Ligand Interaction
FOK
Query on FOK

Download Ideal Coordinates CCD File 
F [auth A]FORSKOLIN
C22 H34 O7
OHCQJHSOBUTRHG-KGGHGJDLSA-N
 Ligand Interaction
MN
Query on MN

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D [auth A],
E [auth A]
MANGANESE (II) ION
Mn
WAEMQWOKJMHJLA-UHFFFAOYSA-N
 Ligand Interaction
CL
Query on CL

Download Ideal Coordinates CCD File 
I [auth C]CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
 Ligand Interaction
MG
Query on MG

Download Ideal Coordinates CCD File 
H [auth C]MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
Binding Affinity Annotations 
IDSourceBinding 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 = 118.23α = 90
b = 133.6β = 90
c = 70.35γ = 90
Software Package:
Software NamePurpose
CNSrefinement
HKL-2000data reduction
SCALEPACKdata scaling
CNSphasing

Structure Validation

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Ligand Structure Quality Assessment 



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • 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