1YK9

Crystal structure of a mutant form of the mycobacterial adenylyl cyclase Rv1625c


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.7 Å
  • R-Value Free: 0.245 
  • R-Value Work: 0.205 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

A Structural Basis for the Role of Nucleotide Specifying Residues in Regulating the Oligomerization of the Rv1625c Adenylyl Cyclase from M.tuberculosis

Ketkar, A.D.Shenoy, A.R.Ramagopal, U.A.Visweswariah, S.S.Suguna, K.

(2006) J.Mol.Biol. 356: 904-916

  • DOI: 10.1016/j.jmb.2005.12.017

  • PubMed Abstract: 
  • The Rv1625c Class III adenylyl cyclase from Mycobacterium tuberculosis is a homodimeric enzyme with two catalytic centers at the dimer interface, and shows sequence similarity with the mammalian adenylyl and guanylyl cyclases. Mutation of the substra ...

    The Rv1625c Class III adenylyl cyclase from Mycobacterium tuberculosis is a homodimeric enzyme with two catalytic centers at the dimer interface, and shows sequence similarity with the mammalian adenylyl and guanylyl cyclases. Mutation of the substrate-specifying residues in the catalytic domain of Rv1625c, either independently or together, to those present in guanylyl cyclases not only failed to confer guanylyl cyclase activity to the protein, but also severely abrogated the adenylyl cyclase activity of the enzyme. Biochemical analysis revealed alterations in the behavior of the mutants on ion-exchange chromatography, indicating differences in the surface-exposed charge upon mutation of substrate-specifying residues. The mutant proteins showed alterations in oligomeric status as compared to the wild-type enzyme, and differing abilities to heterodimerize with the wild-type protein. The crystal structure of a mutant has been solved to a resolution of 2.7A. On the basis of the structure, and additional biochemical studies, we provide possible reasons for the altered properties of the mutant proteins, as well as highlight unique structural features of the Rv1625c adenylyl cyclase.


    Organizational Affiliation

    Department of Molecular Reproduction, Development and Genetics, Indian Institute of Science, Bangalore, 560012, India.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Adenylate cyclase
A
204Mycobacterium tuberculosis (strain ATCC 25618 / H37Rv)Mutation(s): 3 
Gene Names: cya
EC: 4.6.1.1
Find proteins for P9WQ35 (Mycobacterium tuberculosis (strain ATCC 25618 / H37Rv))
Go to UniProtKB:  P9WQ35
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.7 Å
  • R-Value Free: 0.245 
  • R-Value Work: 0.205 
  • Space Group: P 41
Unit Cell:
Length (Å)Angle (°)
a = 71.020α = 90.00
b = 71.020β = 90.00
c = 43.739γ = 90.00
Software Package:
Software NamePurpose
CNSrefinement
SCALEPACKdata scaling
PHASERphasing
DENZOdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2006-01-24
    Type: Initial release
  • Version 1.1: 2008-04-30
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance