1OUT

TROUT HEMOGLOBIN I

• PDB DOI: https://doi.org/10.2210/pdb1OUT/pdb

• Classification: OXYGEN TRANSPORT
• Organism(s): Oncorhynchus mykiss
• Mutation(s): No 


• Deposited: 1996-06-21 Released: 1997-01-11 
• Deposition Author(s): Tame, J., Wilson, J.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.30 Å
• R-Value Free: 0.247 
• R-Value Work: 0.162 

Literature

The crystal structures of trout Hb I in the deoxy and carbonmonoxy forms.

Tame, J.R., Wilson, J.C., Weber, R.E.

(1996) J Mol Biol 259: 749-760

• PubMed: 8683580 
• DOI: https://doi.org/10.1006/jmbi.1996.0355
• Primary Citation of Related Structures:  
  1OUT, 1OUU


• PubMed Abstract: 
  

  We have determined the X-ray crystallographic structure of trout Hb I in both the deoxy and carbonmonoxy forms to resolution limits of 2.3 angstroms and 2.5 angstroms, respectively. The overall fold of the molecule is highly similar to that of human HbA despite the low level of sequence identity between these proteins. Trout Hb I is unusual in displaying almost no pH dependence of oxygen binding affinity, and (at most) very weak interactions with heterotropic effector ligands such as organic phosphates. Comparison of the two quaternary states of the protein indicates how such effects are minimised and how the low-affinity T state of the protein is stabilised in the absence of heterotropic interactions.

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Organizational Affiliation: 

Department of Chemistry, University of York, Helsington, UK.

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: 32.24 kDa 
• Atom Count: 2,475 
• Modelled Residue Count: 289 
• Deposited Residue Count: 289 
• Unique protein chains: 2

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
HEMOGLOBIN I	A	143	Oncorhynchus mykiss	Mutation(s): 0
UniProt
Find proteins for P02019 (Oncorhynchus mykiss) Explore P02019  Go to UniProtKB:  P02019

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
HEMOGLOBIN I	B	146	Oncorhynchus mykiss	Mutation(s): 0
UniProt
Find proteins for P02142 (Oncorhynchus mykiss) Explore P02142  Go to UniProtKB:  P02142

Small Molecules

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

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.30 Å
• R-Value Free: 0.247 
• R-Value Work: 0.162 
• Space Group: P 6₅ 2 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 63.28	α = 90
b = 63.28	β = 90
c = 312.74	γ = 120

Software Package:

Software Name	Purpose
PROLSQ	refinement
MOSFLM	data reduction

Structure Validation

Entry History 

Deposition Data

• Released Date: 1997-01-11 
Deposition Author(s): Tame, J., Wilson, J.

Revision History  

• Version 1.0: 1997-01-11
  Type: Initial release
  
• Version 1.1: 2008-03-24
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2024-06-05
  Changes: Data collection, Database references, Derived calculations, Other
• Version 1.4: 2024-10-23
  Changes: Structure summary