1CUL

COMPLEX OF GS-ALPHA WITH THE CATALYTIC DOMAINS OF MAMMALIAN ADENYLYL CYCLASE: COMPLEX WITH 2',5'-DIDEOXY-ADENOSINE 3'-TRIPHOSPHATE AND MG


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.40 Å
  • R-Value Free: 0.263 
  • R-Value Work: 0.216 
  • R-Value Observed: 0.221 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Molecular basis for P-site inhibition of adenylyl cyclase.

Tesmer, J.J.Dessauer, C.W.Sunahara, R.K.Murray, L.D.Johnson, R.A.Gilman, A.G.Sprang, S.R.

(2000) Biochemistry 39: 14464-14471

  • DOI: 10.1021/bi0015562
  • Primary Citation of Related Structures:  
    1CUL, 1CS4

  • PubMed Abstract: 
  • P-site inhibitors are adenosine and adenine nucleotide analogues that inhibit adenylyl cyclase, the effector enzyme that catalyzes the synthesis of cyclic AMP from ATP. Some of these inhibitors may represent physiological regulators of adenylyl cycla ...

    P-site inhibitors are adenosine and adenine nucleotide analogues that inhibit adenylyl cyclase, the effector enzyme that catalyzes the synthesis of cyclic AMP from ATP. Some of these inhibitors may represent physiological regulators of adenylyl cyclase, and the most potent may ultimately serve as useful therapeutic agents. Described here are crystal structures of the catalytic core of adenylyl cyclase complexed with two such P-site inhibitors, 2'-deoxyadenosine 3'-monophosphate (2'-d-3'-AMP) and 2',5'-dideoxyadenosine 3'-triphosphate (2',5'-dd-3'-ATP). Both inhibitors bind in the active site yet exhibit non- or uncompetitive patterns of inhibition. While most P-site inhibitors require pyrophosphate (PP(i)) as a coinhibitor, 2',5'-dd-3'-ATP is a potent inhibitor by itself. The crystal structure reveals that this inhibitor exhibits two binding modes: one with the nucleoside moiety bound to the nucleoside binding pocket of the enzyme and the other with the beta and gamma phosphates bound to the pyrophosphate site of the 2'-d-3'-AMP.PP(i) complex. A single metal binding site is observed in the complex with 2'-d-3'-AMP, whereas two are observed in the complex with 2', 5'-dd-3'-ATP. Even though P-site inhibitors are typically 10 times more potent in the presence of Mn(2+), the electron density maps reveal no inherent preference of either metal site for Mn(2+) over Mg(2+). 2',5'-dd-3'-ATP binds to the catalytic core of adenylyl cyclase with a K(d) of 2.4 microM in the presence of Mg(2+) and 0.2 microM in the presence of Mn(2+). Pyrophosphate does not compete with 2',5'-dd-3'-ATP and enhances inhibition.


    Organizational Affiliation

    Department of Chemistry and Biochemistry, University of Texas at Austin, Austin, Texas 78712-1167, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
TYPE V ADENYLYL CYCLASEA217Canis lupus familiarisMutation(s): 1 
Gene Names: ADCY5
EC: 4.6.1.1
Find proteins for P30803 (Canis lupus familiaris)
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Go to UniProtKB:  P30803
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
TYPE II ADENYLYL CYCLASEB208Rattus norvegicusMutation(s): 0 
Gene Names: Adcy2
EC: 4.6.1.1
Find proteins for P26769 (Rattus norvegicus)
Explore P26769 
Go to UniProtKB:  P26769
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  • Reference Sequence
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
GUANINE NUCLEOTIDE-BINDING PROTEIN G(S)C380Bos taurusMutation(s): 0 
Gene Names: GNASGNAS1
Find proteins for P04896 (Bos taurus)
Explore P04896 
Go to UniProtKB:  P04896
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  • Reference Sequence
Small Molecules
Ligands 7 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
GSP
Query on GSP

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

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A
FORSKOLIN
C22 H34 O7
OHCQJHSOBUTRHG-KGGHGJDLSA-N
 Ligand Interaction
103
Query on 103

Download CCD File 
B
2',5'-DIDEOXY-ADENOSINE 3'-MONOPHOSPHATE
C10 H14 N5 O5 P
NFGZMOICZSFFLB-DSYKOEDSSA-N
 Ligand Interaction
3PO
Query on 3PO

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A
TRIPHOSPHATE
H5 O10 P3
UNXRWKVEANCORM-UHFFFAOYSA-N
 Ligand Interaction
MES
Query on MES

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A, B
2-(N-MORPHOLINO)-ETHANESULFONIC ACID
C6 H13 N O4 S
SXGZJKUKBWWHRA-UHFFFAOYSA-N
 Ligand Interaction
CL
Query on CL

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C
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
 Ligand Interaction
MG
Query on MG

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A, C
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.40 Å
  • R-Value Free: 0.263 
  • R-Value Work: 0.216 
  • R-Value Observed: 0.221 
  • Space Group: P 21 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 118.2α = 90
b = 133.6β = 90
c = 70.6γ = 90
Software Package:
Software NamePurpose
CNSrefinement
MOSFLMdata reduction
CCP4data scaling
CNSphasing

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2001-01-10
    Type: Initial release
  • Version 1.1: 2008-04-27
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance