1HCO

THE STRUCTURE OF HUMAN CARBONMONOXY HAEMOGLOBIN AT 2.7 ANGSTROMS RESOLUTION

• PDB DOI: https://doi.org/10.2210/pdb1HCO/pdb

• Classification: OXYGEN TRANSPORT
• Organism(s): Homo sapiens
• Mutation(s): No 


• Deposited: 1979-08-07 Released: 1979-08-26 
• Deposition Author(s): Baldwin, J.M.

---

Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.70 Å

Literature

The structure of human carbonmonoxy haemoglobin at 2.7 A resolution.

Baldwin, J.M.

(1980) J Mol Biol 136: 103-128

• PubMed: 7373648 
• DOI: https://doi.org/10.1016/0022-2836(80)90308-3
• Primary Citation of Related Structures:  
  1HCO, 2HCO

Biological Assembly 1  

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

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 32.33 kDa 
• Atom Count: 2,282 
• Modelled Residue Count: 287 
• Deposited Residue Count: 287 
• Unique protein chains: 2

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
HEMOGLOBIN (CARBONMONOXY) (ALPHA CHAIN)	A	141	Homo sapiens	Mutation(s): 0
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
HEMOGLOBIN (CARBONMONOXY) (BETA CHAIN)	B	146	Homo sapiens	Mutation(s): 0
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 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
HEM	C [auth A], E [auth B]	PROTOPORPHYRIN IX CONTAINING FE C34 H32 Fe N4 O4 KABFMIBPWCXCRK-RGGAHWMASA-L
CMO	D [auth A], F [auth B]	CARBON MONOXIDE C O UGFAIRIUMAVXCW-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.70 Å

Space Group: P 4₁ 2₁ 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 53.7	α = 90
b = 53.7	β = 90
c = 193	γ = 90

Structure Validation

Entry History 

Deposition Data

• Released Date: 1979-08-26 
Deposition Author(s): Baldwin, J.M.

Revision History  

• Version 1.0: 1979-08-26
  Type: Initial release
  
• Version 1.1: 2008-03-24
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Advisory, Version format compliance
• Version 1.3: 2014-10-29
  Changes: Derived calculations
• Version 2.0: 2023-02-08
  Type: Remediation
  Changes: Atomic model, Data collection, Database references, Derived calculations, Other
• Version 2.1: 2023-03-15
  Changes: Advisory
• Version 2.2: 2023-09-27
  Changes: Data collection, Derived calculations