1FHI

SUBSTRATE ANALOG (IB2) COMPLEX WITH THE FRAGILE HISTIDINE TRIAD PROTEIN, FHIT


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.1 Å
  • R-Value Free: 0.314 
  • R-Value Work: 0.241 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Genetic, biochemical, and crystallographic characterization of Fhit-substrate complexes as the active signaling form of Fhit.

Pace, H.C.Garrison, P.N.Robinson, A.K.Barnes, L.D.Draganescu, A.Rosler, A.Blackburn, G.M.Siprashvili, Z.Croce, C.M.Huebner, K.Brenner, C.

(1998) Proc.Natl.Acad.Sci.USA 95: 5484-5489

  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Alterations in the FHIT gene at 3p14.2 occur as early and frequent events in the development of several common human cancers. The ability of human Fhit-negative cells to form tumors in nude mice is suppressed by stable reexpression of Fhit protein. F ...

    Alterations in the FHIT gene at 3p14.2 occur as early and frequent events in the development of several common human cancers. The ability of human Fhit-negative cells to form tumors in nude mice is suppressed by stable reexpression of Fhit protein. Fhit protein is a diadenosine P1,P3-triphosphate (ApppA) hydrolase whose fungal and animal homologs form a branch of the histidine triad (HIT) superfamily of nucleotide-binding proteins. Because the His-96 --> Asn substitution of Fhit, which retards ApppA hydrolase activity by seven orders of magnitude, did not block tumor-suppressor activity in vivo, we determined whether this mutation affected ApppA binding or particular steps in the ApppA catalytic cycle. Evidence is presented that His-96 --> Asn protein binds ApppA well and forms an enzyme-AMP intermediate extremely poorly, suggesting that Fhit-substrate complexes are the likely signaling form of the enzyme. The cocrystal structure of Fhit bound to Ado-p-CH2-p-ps-Ado (IB2), a nonhydrolyzable ApppA analog, was refined to 3.1 A, and the structure of His-96 --> Asn Fhit with IB2 was refined to 2.6 A, revealing that two ApppA molecules bind per Fhit dimer; identifying two additional adenosine-binding sites on the dimer surface; and illustrating that His-98 is positioned to donate a hydrogen bond to the scissile bridging oxygen of ApppA substrates. The form of Fhit bound to two ApppA substrates would present to the cell a dramatically phosphorylated surface, prominently displaying six phosphate groups and two adenosine moieties in place of a deep cavity lined with histidines, arginines, and glutamines.


    Related Citations: 
    • Purification and Crystallization of Complexes Modeling the Active State of the Fragile Histidine Triad Protein
      Brenner, C.,Pace, H.C.,Garrison, P.N.,Robinson, A.K.,Rosler, A.,Liu, X.H.,Blackburn, G.M.,Croce, C.M.,Huebner, K.,Barnes, L.D.
      (1998) Protein Eng. 10: 1461


    Organizational Affiliation

    Kimmel Cancer Institute, Thomas Jefferson University, Philadelphia, PA 19107, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
FRAGILE HISTIDINE TRIAD PROTEIN
A
147Homo sapiensMutation(s): 0 
Gene Names: FHIT
EC: 3.6.1.29
Find proteins for P49789 (Homo sapiens)
Go to Gene View: FHIT
Go to UniProtKB:  P49789
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
IB2
Query on IB2

Download SDF File 
Download CCD File 
A
P1-P2-METHYLENE-P3-THIO-DIADENOSINE TRIPHOSPHATE
ADO-P-CH2-P-PS-ADO
C21 H29 N10 O14 P3 S
UJCWOSLCGXVJOD-LCHUORCTSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.1 Å
  • R-Value Free: 0.314 
  • R-Value Work: 0.241 
  • Space Group: P 61 2 2
Unit Cell:
Length (Å)Angle (°)
a = 50.728α = 90.00
b = 50.728β = 90.00
c = 268.513γ = 120.00
Software Package:
Software NamePurpose
X-PLORmodel building
X-PLORphasing
SCALEPACKdata scaling
X-PLORrefinement
DENZOdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1998-06-17
    Type: Initial release
  • Version 1.1: 2008-03-24
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance