Biological Assembly 1  

 3D View: Structure | Ligand Interaction

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 3-mer - A2B1 

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

Macromolecule Content

• Total Structure Weight: 65.27 kDa 
• Atom Count: 5017 
• Residue Count: 575 
• Unique protein chains: 2

1ABW

DEOXY RHB1.1 (RECOMBINANT HEMOGLOBIN)

• DOI: 10.2210/pdb1ABW/pdb

• Classification: OXYGEN TRANSPORT
• Organism(s): Homo sapiens
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 1997-01-29 Released: 1998-06-17 
• Deposition Author(s): Kundrot, C.E., Kroeger, K.S.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.00 Å
• R-Value Free: 0.232 
• R-Value Work: 0.164 
• R-Value Observed: 0.164 

Literature

Structures of a hemoglobin-based blood substitute: insights into the function of allosteric proteins.

Kroeger, K.S., Kundrot, C.E.

(1997) Structure 5: 227-237

• PubMed: 9032082 
• DOI: 10.1016/s0969-2126(97)00181-0
• Structures With Same Primary Citation


• PubMed Abstract: 
  

. Potential blood substitutes can be based on hemoglobin. Two problems must be overcome with acellular hemoglobin-based blood substitutes, however: the oxygen affinity of purified human hemoglobin is too high for it to deliver oxygen to tissues, and hemoglobin tetramers dissociate into alphabeta dimers that can cause kidney damage. A modified form of hemoglobin, rHb 1.1, has reduced oxygen affinity as the result of an Asnbeta 108-->Lys mutation, and dimerization is prevented by the insertion of a glycine residue between the sequences of the normal alpha chains to produce one covalently continuous di-alpha-chain. Determination of the structure of rHb 1.1 would provide structure-based explanations for the altered properties of rHb 1.1.

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Related Citations: 

• A Human Recombinant Haemoglobin Designed for Use as a Blood Substitute
  Looker, D., Abbott-Brown, D., Cozart, P., Durfee, S., Hoffman, S., Mathews, A.J., Miller-Roehrich, J., Shoemaker, S., Trimble, S., Fermi, G., Komiyama, N.H., Nagai, K., Stetler, G.L.
  (1992) Nature 356: 258

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Organizational Affiliation: 

Department of Chemistry and Biochemistry, University of Colorado, Boulder, CO 80309-0215, USA.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
HEMOGLOBIN-BASED BLOOD SUBSTITUTE	A	283	Homo sapiens	Mutation(s): 0  Gene Names: HBA1, HBA2
Find proteins for P69905 (Homo sapiens) Explore P69905  Go to UniProtKB:  P69905
NIH Common Fund Data Resources
PHAROS  P69905 GTEx  ENSG00000188536GTEx  ENSG00000206172

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details
HEMOGLOBIN-BASED BLOOD SUBSTITUTE	B, D	146	Homo sapiens	Mutation(s): 0  Gene Names: HBB
Find proteins for P68871 (Homo sapiens) Explore P68871  Go to UniProtKB:  P68871
NIH Common Fund Data Resources
PHAROS  P68871 GTEx  ENSG00000244734

Small Molecules

Ligands 3 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
HEM	A, B, D	PROTOPORPHYRIN IX CONTAINING FE C34 H32 Fe N4 O4 KABFMIBPWCXCRK-RGGAHWMASA-L
MET	A	METHIONINE C5 H11 N O2 S FFEARJCKVFRZRR-BYPYZUCNSA-N
LEU	A	LEUCINE C6 H13 N O2 ROHFNLRQFUQHCH-YFKPBYRVSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.00 Å
• R-Value Free: 0.232 
• R-Value Work: 0.164 
• R-Value Observed: 0.164 
• Space Group: P 1 2₁ 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 62.9	α = 90
b = 81.98	β = 98.99
c = 53.92	γ = 90

Software Package:

Software Name	Purpose
X-PLOR	model building
X-PLOR	refinement
XDS	data reduction
XSCALE	data scaling
X-PLOR	phasing

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 1997-01-29 
• Released Date: 1998-06-17 
Deposition Author(s): Kundrot, C.E., Kroeger, K.S.

Revision History 

• Version 1.0: 1998-06-17
  Type: Initial release
  
• Version 1.1: 2008-03-10
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Derived calculations, Version format compliance