1BIJ

CROSSLINKED, DEOXY HUMAN HEMOGLOBIN A

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.30 Å
  • R-Value Free: 0.263 
  • R-Value Work: 0.190 
  • R-Value Observed: 0.190 

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


Literature

Crystal structure of Lysbeta(1)82-Lysbeta(2)82 crosslinked hemoglobin: a possible allosteric intermediate

Fernandez, E.J., Abad-Zapatero, C., Olsen, K.W.

(2000) J Mol Biol 296: 1245-1256

  • DOI: 10.1006/jmbi.2000.3525
  • Primary Citation of Related Structures:  
    1BIJ

  • PubMed Abstract: 

    • The crystal structure of human hemoglobin crosslinked between the Lysbeta82 residues has been determined at 2.30 A resolution. The crosslinking reaction was performed under oxy conditions using bis(3, 5-dibromosalicyl) fumarate; the modified hemoglobin has increased oxygen affinity and lacks cooperativity ...

    The crystal structure of human hemoglobin crosslinked between the Lysbeta82 residues has been determined at 2.30 A resolution. The crosslinking reaction was performed under oxy conditions using bis(3, 5-dibromosalicyl) fumarate; the modified hemoglobin has increased oxygen affinity and lacks cooperativity. Since the crystallization occurred under deoxy conditions, the resulting structure displays conformational characteristics of both the (oxy) R and the (deoxy) T-states. beta82XLHbA does not fully reach its T-state conformation due to the presence of the crosslink. The R-state-like characteristics of deoxy beta82XLHbA include the position of the distal Hisbeta63 (E7) residue, indicating a possible reason for the high oxygen affinity of this derivative. Other areas of the molecule, particularly those thought to be important in the allosteric transition, such as Tyrbeta145 (HC2) and the switch region involving Proalpha(1)44 (CD2), Thralpha(1)41 (C6) and Hisbeta(2)97 (FG4), are in intermediate positions between the R and T-states. Thus, the structure may represent a stabilized intermediate in the allosteric transition of hemoglobin.

    Organizational Affiliation: 

    Department of Chemistry, Loyola University Chicago, Chicago, IL 60626, USA.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
HEMOGLOBIN AA, C141Homo sapiensMutation(s): 0 
Gene Names: HBA1, HBA2
UniProt & NIH Common Fund Data Resources
Find proteins for P69905 (Homo sapiens)
Explore P69905 
Go to UniProtKB:  P69905
PHAROS:  P69905
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP69905
Protein Feature View
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  • Reference Sequence
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(by identity cutoff)  |  3D Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
HEMOGLOBIN AB, D146Homo sapiensMutation(s): 0 
Gene Names: HBB
UniProt & NIH Common Fund Data Resources
Find proteins for P68871 (Homo sapiens)
Explore P68871 
Go to UniProtKB:  P68871
PHAROS:  P68871
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP68871
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
HEM
Query on HEM
Download Ideal Coordinates CCD File 
E [auth A],
F [auth B],
G [auth C],
H [auth D]		PROTOPORPHYRIN IX CONTAINING FE
C34 H32 Fe N4 O4
KABFMIBPWCXCRK-RGGAHWMASA-L		 Ligand Interaction
2FU
Query on 2FU
Download Ideal Coordinates CCD File 
I [auth D]BUT-2-ENEDIAL
C4 H4 O2
JGEMYUOFGVHXKV-OWOJBTEDSA-N		 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.30 Å
  • R-Value Free: 0.263 
  • R-Value Work: 0.190 
  • R-Value Observed: 0.190 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 65.3α = 90
b = 96β = 101.5
c = 101.5γ = 90
Software Package:
Software NamePurpose
X-PLORmodel building
X-PLORrefinement
R-AXISdata reduction
X-PLORphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 1999-03-30
    Type: Initial release
  • Version 1.1: 2008-03-03
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance