Biological Assembly 1  

 3D View: Structure | Ligand Interaction

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Global Symmetry: Cyclic - C2  (3D View)
Global Stoichiometry: Hetero 4-mer - A2B2 Pseudo Symmetry: Dihedral - D2  (3D View)
Pseudo Stoichiometry: Homo 4-mer -A4 

Biological assembly 1 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 64631.12 
• Atom Count: 4562 
• Residue Count: 574 
• Unique protein chains: 2

1BIJ

CROSSLINKED, DEOXY HUMAN HEMOGLOBIN A

• DOI: 10.2210/pdb1BIJ/pdb

• Classification: OXYGEN TRANSPORT
• Organism(s): Homo sapiens


• Deposited: 1998-06-18 Released: 1999-03-30 
• Deposition Author(s): Fernandez, E.J., Abad-Zapatero, C., Olsen, K.W.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.3 Å
• R-Value Free: 0.263 
• R-Value Work: 0.190 

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

• PubMed: 10698631 
• DOI: 10.1006/jmbi.2000.3525


• 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. 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.

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Organizational Affiliation: 

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

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
HEMOGLOBIN A	A, C	141	Homo sapiens	Mutation(s): 0  Gene Names: HBA1, HBA2
Find proteins for P69905 (Homo sapiens) Go to Gene View: HBA1 HBA2 Go to UniProtKB:  P69905

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details
HEMOGLOBIN A	B, D	146	Homo sapiens	Mutation(s): 0  Gene Names: HBB
Find proteins for P68871 (Homo sapiens) Go to Gene View: HBB Go to UniProtKB:  P68871

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram & Interactions
2FU	D	BUT-2-ENEDIAL C4 H4 O2 JGEMYUOFGVHXKV-OWOJBTEDSA-N
HEM	A, B, C, D	PROTOPORPHYRIN IX CONTAINING FE HEME C34 H32 Fe N4 O4 KABFMIBPWCXCRK-RGGAHWMASA-L

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.3 Å
• R-Value Free: 0.263 
• R-Value Work: 0.190 
• Space Group: P 1 2₁ 1

Unit Cell:

Length (Å)	Angle (°)
a = 65.300	α = 90.00
b = 96.000	β = 101.50
c = 101.500	γ = 90.00

Software Package:

Software Name	Purpose
X-PLOR	phasing
R-AXIS	data reduction
X-PLOR	model building
X-PLOR	refinement

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 1998-06-18 
• Released Date: 1999-03-30 
• Deposition Author(s): Fernandez, E.J., Abad-Zapatero, C., Olsen, K.W.

Revision History 

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