3UH7

HBI (T72G) CO bound


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.8 Å
  • R-Value Free: 0.194 
  • R-Value Work: 0.166 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Cooperative macromolecular device revealed by meta-analysis of static and time-resolved structures.

Ren, Z.Srajer, V.Knapp, J.E.Royer, W.E.

(2012) Proc.Natl.Acad.Sci.USA 109: 107-112

  • DOI: 10.1073/pnas.1109213108
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Here we present a meta-analysis of a large collection of static structures of a protein in the Protein Data Bank in order to extract the progression of structural events during protein function. We apply this strategy to the homodimeric hemoglobin Hb ...

    Here we present a meta-analysis of a large collection of static structures of a protein in the Protein Data Bank in order to extract the progression of structural events during protein function. We apply this strategy to the homodimeric hemoglobin HbI from Scapharca inaequivalvis. We derive a simple dynamic model describing how binding of the first ligand in one of the two chemically identical subunits facilitates a second binding event in the other partner subunit. The results of our ultrafast time-resolved crystallographic studies support this model. We demonstrate that HbI functions like a homodimeric mechanical device, such as pliers or scissors. Ligand-induced motion originating in one subunit is transmitted to the other via conserved pivot points, where the E and F' helices from two partner subunits are "bolted" together to form a stable dimer interface permitting slight relative rotation but preventing sliding.


    Organizational Affiliation

    Center for Advanced Radiation Sources, University of Chicago, 9700 South Cass Avenue, Building 434B, Argonne, IL 60439, USA. renz@uchicago.edu




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Globin-1
A, B
146Anadara inaequivalvisMutation(s): 1 
Find proteins for P02213 (Anadara inaequivalvis)
Go to UniProtKB:  P02213
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
HEM
Query on HEM

Download SDF File 
Download CCD File 
A, B
PROTOPORPHYRIN IX CONTAINING FE
HEME
C34 H32 Fe N4 O4
KABFMIBPWCXCRK-RGGAHWMASA-L
 Ligand Interaction
CMO
Query on CMO

Download SDF File 
Download CCD File 
A, B
CARBON MONOXIDE
C O
UGFAIRIUMAVXCW-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.8 Å
  • R-Value Free: 0.194 
  • R-Value Work: 0.166 
  • Space Group: C 1 2 1
Unit Cell:
Length (Å)Angle (°)
a = 93.260α = 90.00
b = 43.980β = 122.01
c = 83.450γ = 90.00
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
CNSrefinement
CNSphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2011-12-28
    Type: Initial release
  • Version 1.1: 2012-01-18
    Type: Database references
  • Version 1.2: 2017-11-08
    Type: Refinement description