1AB8 | pdb_00001ab8

RAT TYPE II ADENYLYL CYCLASE C2 DOMAIN/FORSKOLIN COMPLEX

• PDB DOI: https://doi.org/10.2210/pdb1AB8/pdb

• Classification: LYASE
• Organism(s): Rattus norvegicus
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): No 


• Deposited: 1997-02-04 Released: 1997-05-15 
• Deposition Author(s): Zhang, G., Hurley, J.H.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.20 Å
• R-Value Free: 
  0.284 (Depositor) 
• R-Value Work: 
  0.219 (Depositor) 
• R-Value Observed: 
  0.219 (Depositor) 

Literature

Structure of the adenylyl cyclase catalytic core.

Zhang, G., Liu, Y., Ruoho, A.E., Hurley, J.H.

(1997) Nature 386: 247-253

• PubMed: 9069282 
• DOI: https://doi.org/10.1038/386247a0
• Primary Citation Related Structures: 
  1AB8


• PubMed Abstract: 
  

  Mammalian adenylyl cyclases contain two conserved regions, C1 and C2, which are responsible for forskolin- and G-protein-stimulated catalysis. The structure of the C2 catalytic region of type II rat adenylyl cyclase has an alpha/beta class fold in a wreath-like dimer, which has a central cleft. Two forskolin molecules bind in hydrophobic pockets at the ends of cleft. The central part of the cleft is lined by charged residues implicated in ATP binding. Forskolin appears to activate adenylyl cyclase by promoting the assembly of the active dimer and by direct interaction within the catalytic cleft. Other adenylyl cyclase regulators act at the dimer interface or on a flexible C-terminal region.

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Organizational Affiliation: 
• Laboratory of Molecular Biology, National Institute of Diabetes, Digestive, and Kidney Diseases, National Institutes of Health, Bethesda, Maryland 20892-0580, USA.

Biological Assembly 1  

Global Symmetry: Cyclic - C2  (Explore in 3D)
Global Stoichiometry: Homo 2-mer - A2 

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

Biological Assembly 2  

Global Symmetry: Dihedral - D2  (Explore in 3D)
Global Stoichiometry: Homo 4-mer - A4 

Biological assembly 2 generated by PISA (software)

Macromolecule Content 

• Total Structure Weight: 49.72 kDa 
• Atom Count: 2,885 
• Modeled Residue Count: 353 
• Deposited Residue Count: 440 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
ADENYLYL CYCLASE	A, B	220	Rattus norvegicus	Mutation(s): 0  Gene Names: PPROEX-1 EC: 4.6.1.1
UniProt
Find proteins for P26769 (Rattus norvegicus) Explore P26769  Go to UniProtKB:  P26769

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
FOK	C [auth A], D [auth B]	FORSKOLIN C22 H34 O7 OHCQJHSOBUTRHG-KGGHGJDLSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.20 Å
• R-Value Free:  0.284 (Depositor) 
• R-Value Work:  0.219 (Depositor) 
• R-Value Observed: 0.219 (Depositor) 

Space Group: P 4₃ 2₁ 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 81.3	α = 90
b = 81.3	β = 90
c = 180.5	γ = 90

Software Package:

Software Name	Purpose
PHASES	phasing
X-PLOR	model building
X-PLOR	refinement
DENZO	data reduction
SCALEPACK	data scaling
X-PLOR	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 1997-05-15 
Deposition Author(s): Zhang, G., Hurley, J.H.

Revision History  

• Version 1.0: 1997-05-15
  Type: Initial release
  
• Version 1.1: 2008-03-24
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2011-11-16
  Changes: Atomic model
• Version 1.4: 2024-02-07
  Changes: Data collection, Database references, Derived calculations