6KYE

The crystal structure of recombinant human adult hemoglobin


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.28 Å
  • R-Value Free: 0.268 
  • R-Value Work: 0.226 

wwPDB Validation 3D Report Full Report


This is version 1.0 of the entry. See complete history

Literature

Genetically engineered haemoglobin wrapped covalently with human serum albumins as an artificial O2carrier.

Funaki, R.Okamoto, W.Endo, C.Morita, Y.Kihira, K.Komatsu, T.

(2019) J Mater Chem B --: --

  • DOI: 10.1039/c9tb02184a

  • PubMed Abstract: 
  • We describe the synthesis and O2 affinity of genetically engineered human adult haemoglobin (rHbA) wrapped covalently with recombinant human serum albumins (rHSAs) as an artificial O2 carrier used for a completely synthetic red blood cell (RBC) subst ...

    We describe the synthesis and O2 affinity of genetically engineered human adult haemoglobin (rHbA) wrapped covalently with recombinant human serum albumins (rHSAs) as an artificial O2 carrier used for a completely synthetic red blood cell (RBC) substitute. Wild-type rHbA [rHbA(wt)] expressed in yeast species Pichia pastoris shows an identical amino acid sequence and three-dimensional structure to those of native HbA. It is particularly interesting that two orientations of the prosthetic haem group in rHbA(wt) were aligned by gentle heating in the natural form. Covalent wrapping of rHbA(wt) with three rHSAs conferred a core-shell structured haemoglobin-albumin cluster: rHbA(wt)-rHSA3. Three variant clusters containing an rHbA mutant core were also created: Leu-β28 → Phe, Leu-β28 → Trp, and Leu-β28 → Tyr/His-β63 → Gln. Replacement of Leu-β28 with Trp decreased the distal space in the haem pocket, thereby yielding a cluster with moderately low O2 affinity which is nearly the same as that of human RBC.


    Organizational Affiliation

    JEM Utilization Center, Human Spaceflight Technology Directorate, Japan Aerospace Exploration Agency (JAXA), 2-1-1 Sengen, Tsukuba-shi, Ibaraki 305-8505, Japan.,Department of Applied Chemistry, Faculty of Science and Engineering, Chuo University, 1-13-27 Kasuga, Bunkyo-ku, Tokyo 112-8551, Japan. komatsu@kc.chuo-u.ac.jp.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Hemoglobin subunit alpha
A, C, E, G, I, K
142Homo sapiensMutation(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
MoleculeChainsSequence LengthOrganismDetails
Hemoglobin subunit beta
B, D, F, H, J, L
147Homo sapiensMutation(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
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
HEM
Query on HEM

Download SDF File 
Download CCD File 
A, B, C, D, E, F, G, H, I, J, K, L
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, C, D, E, F, G, H, I, J, K, L
CARBON MONOXIDE
C O
UGFAIRIUMAVXCW-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.28 Å
  • R-Value Free: 0.268 
  • R-Value Work: 0.226 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 123.031α = 90.00
b = 55.947β = 98.27
c = 133.156γ = 90.00
Software Package:
Software NamePurpose
Aimlessdata scaling
REFMACrefinement
XDSdata reduction
PHASERphasing
PDB_EXTRACTdata extraction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Japan Society for the Promotion of ScienceJapan18K19007

Revision History 

  • Version 1.0: 2020-01-01
    Type: Initial release