1C7D

DEOXY RHB1.2 (RECOMBINANT HEMOGLOBIN)

• PDB DOI: https://doi.org/10.2210/pdb1C7D/pdb

• Classification: OXYGEN STORAGE/TRANSPORT
• Organism(s): Homo sapiens
• Expression System: Escherichia coli
• Mutation(s): Yes 


• Deposited: 2000-02-09 Released: 2000-06-30 
• Deposition Author(s): Brucker, E.A.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.80 Å
• R-Value Free: 0.240 
• R-Value Observed: 0.188 

Starting Model: experimental

Literature

Genetically crosslinked hemoglobin: a structural study.

Brucker, E.A.

(2000) Acta Crystallogr D Biol Crystallogr 56: 812-816

• PubMed: 10930828 
• DOI: https://doi.org/10.1107/s0907444900006557
• Primary Citation of Related Structures:  
  1C7B, 1C7C, 1C7D


• PubMed Abstract: 
  

  The crystal structures of three recombinant human hemoglobins, rHb1. 0, rHb1.1 and rHb1.2, have been determined in the deoxy state at 1.8 A resolution. Two of the three proteins, rHb1.1 and rHb1.2, contain a genetic fusion of the alpha subunits, a one- or two-glycine link, respectively, whereas rHb1.0 does not. The glycine crosslinks, localized between one N- and C--termini pair of the alpha subunits in the deoxy crystalline state, do not perturb the overall tertiary or quaternary or even the local structure of hemoglobin. Therefore, genetic fusion to prevent the dissociation of the hemoglobin tetramer, thereby inhibiting renal clearance based upon molecular size, is a structurally conservative method to stabilize hemoglobin for use as an oxygen-delivery therapeutic.

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Organizational Affiliation: 

Baxter Healthcare Corporation, Hemoglobin Therapeutics Division, 2545 Central Avenue, Boulder, CO 80301-2857, USA. ebrucker@baxter. com.

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 3-mer - A2B1 Local Symmetry: Cyclic - C2  (Explore in 3D)
Local Stoichiometry: Homo 2-mer - A2 

Local Symmetry: Cyclic - C2  (Explore in 3D)
Local Stoichiometry: Homo 2-mer - A2 

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

Macromolecule Content

• Total Structure Weight: 64.77 kDa 
• Atom Count: 4,812 
• Modelled Residue Count: 576 
• Deposited Residue Count: 576 
• Unique protein chains: 2

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
PROTEIN (DEOXYHEMOGLOBIN (ALPHA CHAIN))	A	284	Homo sapiens	Mutation(s): 1
UniProt & NIH Common Fund Data Resources
Find proteins for P69905 (Homo sapiens) Explore P69905  Go to UniProtKB:  P69905
PHAROS:  P69905 GTEx:  ENSG00000188536 ENSG00000206172

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
PROTEIN (DEOXYHEMOGLOBIN (BETA CHAIN))	B, C [auth D]	146	Homo sapiens	Mutation(s): 2
UniProt & NIH Common Fund Data Resources
Find proteins for P68871 (Homo sapiens) Explore P68871  Go to UniProtKB:  P68871
PHAROS:  P68871 GTEx:  ENSG00000244734

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
HEM	D [auth A], E [auth A], F [auth B], G [auth D]	PROTOPORPHYRIN IX CONTAINING FE C34 H32 Fe N4 O4 KABFMIBPWCXCRK-RGGAHWMASA-L

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.80 Å
• R-Value Free: 0.240 
• R-Value Observed: 0.188 
• Space Group: P 1 2₁ 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 63.144	α = 90
b = 83.282	β = 99.07
c = 53.928	γ = 90

Software Package:

Software Name	Purpose
XDS	data scaling
XSCALE	data scaling
SHELX	model building
SHELXL-97	refinement
XDS	data reduction
SHELX	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 2000-06-30 
Deposition Author(s): Brucker, E.A.

Revision History  

• Version 1.0: 2000-06-30
  Type: Initial release
  
• Version 1.1: 2008-04-26
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2017-08-09
  Changes: Refinement description, Source and taxonomy
• Version 1.4: 2021-11-03
  Changes: Database references, Derived calculations
• Version 1.5: 2023-08-09
  Changes: Data collection, Refinement description