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: 2.4 Å
  • R-Value Free: 0.263 
  • R-Value Work: 0.216 

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

  • Primary Citation of Related Structures:  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: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
TYPE V ADENYLYL CYCLASE
A
217Canis lupus familiarisGene Names: ADCY5
EC: 4.6.1.1
Find proteins for P30803 (Canis lupus familiaris)
Go to Gene View: ADCY5
Go to UniProtKB:  P30803
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
TYPE II ADENYLYL CYCLASE
B
208Rattus norvegicusGene Names: Adcy2
EC: 4.6.1.1
Find proteins for P26769 (Rattus norvegicus)
Go to UniProtKB:  P26769
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
GUANINE NUCLEOTIDE-BINDING PROTEIN G(S)
C
380Bos taurusGene Names: GNAS (GNAS1)
Find proteins for P04896 (Bos taurus)
Go to Gene View: GNAS
Go to UniProtKB:  P04896
Small Molecules
Ligands 7 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
FOK
Query on FOK

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

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C
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
 Ligand Interaction
3PO
Query on 3PO

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A
TRIPHOSPHATE
H5 O10 P3
UNXRWKVEANCORM-UHFFFAOYSA-N
 Ligand Interaction
103
Query on 103

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

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A, C
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
GSP
Query on GSP

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C
5'-GUANOSINE-DIPHOSPHATE-MONOTHIOPHOSPHATE
C10 H16 N5 O13 P3 S
XOFLBQFBSOEHOG-UUOKFMHZSA-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
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.4 Å
  • R-Value Free: 0.263 
  • R-Value Work: 0.216 
  • Space Group: P 21 21 2
Unit Cell:
Length (Å)Angle (°)
a = 118.200α = 90.00
b = 133.600β = 90.00
c = 70.600γ = 90.00
Software Package:
Software NamePurpose
CCP4data scaling
CNSphasing
MOSFLMdata reduction
CNSrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

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