2G95

Crystal Structure of Visfatin/Pre-B Cell Colony Enhancing Factor 1/Nicotinamide Phosphoribosyltransferase

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Free: 0.267 
  • R-Value Work: 0.235 
  • R-Value Observed: 0.238 

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This is version 1.2 of the entry. See complete history. 


Literature

Crystal Structure of Visfatin/Pre-B Cell Colony-enhancing Factor 1/Nicotinamide Phosphoribosyltransferase, Free and in Complex with the Anti-cancer Agent FK-866

Kim, M.-K., Lee, J.H., Kim, H., Park, S.J., Kim, S.H., Kang, G.B., Lee, Y.S., Kim, J.B., Kim, K.K., Suh, S.W., Eom, S.H.

(2006) J Mol Biol 362: 66-77

  • DOI: 10.1016/j.jmb.2006.06.082
  • Primary Citation of Related Structures:  
    2G95, 2G96, 2G97

  • PubMed Abstract: 

    • Visfatin/pre-B cell colony-enhancing factor 1 (PBEF)/nicotinamide phosphoribosyltransferase (NAmPRTase) is a multifunctional protein having phosphoribosyltransferase, cytokine and adipokine activities. Originally isolated as a cytokine promoting the differentiation of B cell precursors, it was recently suggested to act as an insulin analog via the insulin receptor ...

    Visfatin/pre-B cell colony-enhancing factor 1 (PBEF)/nicotinamide phosphoribosyltransferase (NAmPRTase) is a multifunctional protein having phosphoribosyltransferase, cytokine and adipokine activities. Originally isolated as a cytokine promoting the differentiation of B cell precursors, it was recently suggested to act as an insulin analog via the insulin receptor. Here, we describe the first crystal structure of visfatin in three different forms: apo and in complex with either nicotinamide mononucleotide (NMN) or the NAmPRTase inhibitor FK-866 which was developed as an anti-cancer agent, interferes with NAD biosynthesis, showing a particularly high specificity for NAmPRTase. The crystal structures of the complexes with either NMN or FK-866 show that the enzymatic active site of visfatin is optimized for nicotinamide binding and that the nicotinamide-binding site is important for inhibition by FK-866. Interestingly, visfatin mimics insulin signaling by binding to the insulin receptor with an affinity similar to that of insulin and does not share the binding site with insulin on the insulin receptor. To predict binding sites, the potential interaction patches of visfatin and the L1-CR-L2 domain of insulin receptor were generated and analyzed. Although the relationship between the insulin-mimetic property and the enzymatic function of visfatin has not been clearly established, our structures raise the intriguing possibility that the glucose metabolism and the NAD biosynthesis are linked by visfatin.

    Organizational Affiliation: 

    Department of Life Science, Gwangju Institute of Science & Technology, Gwangju 500-712, Korea.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Nicotinamide phosphoribosyltransferaseA, B491Rattus norvegicusMutation(s): 0 
Gene Names: Nampt, Pbef1
EC: 2.4.2.12
UniProt
Find proteins for Q80Z29 (Rattus norvegicus)
Explore Q80Z29 
Go to UniProtKB:  Q80Z29
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ80Z29
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Free: 0.267 
  • R-Value Work: 0.235 
  • R-Value Observed: 0.238 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 66.3α = 90
b = 94.917β = 104.91
c = 84.866γ = 90
Software Package:
Software NamePurpose
HKL-2000data collection
SCALEPACKdata scaling
SOLVEphasing
CNSrefinement
HKL-2000data reduction

Structure Validation

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Entry History 

Deposition Data

  • Deposited Date: 2006-03-05 
  • Released Date: 2006-08-01 
    • Deposition Author(s): Kim, M.-K., Eom, S.H.

Revision History  (Full details and data files)

  • Version 1.0: 2006-08-01
    Type: Initial release
  • Version 1.1: 2008-05-01
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance