1BZ0

HEMOGLOBIN A (HUMAN, DEOXY, HIGH SALT)

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.50 Å
  • R-Value Free: 0.208 
  • R-Value Work: 0.167 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history. 


Literature

Accommodation of insertions in helices: the mutation in hemoglobin Catonsville (Pro 37 alpha-Glu-Thr 38 alpha) generates a 3(10)-->alpha bulge.

Kavanaugh, J.S., Moo-Penn, W.F., Arnone, A.

(1993) Biochemistry 32: 2509-2513

  • DOI: 10.1021/bi00061a007
  • Structures With Same Primary Citation

  • PubMed Abstract: 

    • Hemoglobin Catonsville is a mutation of human hemoglobin (an alpha 2 beta 2 tetramer) in which a glutamate residue is inserted into the first turn of a highly conserved 3(10) helix (the C helix) of each alpha subunit. In theory, amino acid insertions ...

    Hemoglobin Catonsville is a mutation of human hemoglobin (an alpha 2 beta 2 tetramer) in which a glutamate residue is inserted into the first turn of a highly conserved 3(10) helix (the C helix) of each alpha subunit. In theory, amino acid insertions (or deletions) in protein helices can be accommodated via two distinct mechanisms. One, termed the register shift mechanism, preserves the geometry of the helix while requiring all of the residues on one flank of the insertion site to rotate by 100 degrees in the case of an alpha helix or by 120 degrees in the case of a 3(10) helix. The other, termed the bulge (or indentation) mechanism, distorts the local geometry of the helix but does not alter the helix register. High-resolution X-ray diffraction analysis of deoxyhemoglobin Catonsville shows that the inserted residue is accommodated as a bulge, demonstrating that this is a viable mechanism. (In contrast, no such evidence is yet available for the register shift mechanism.) More specifically, the insertion converts one turn of the C helix from 3(10) geometry to alpha helix-like geometry, raising the possibility that a common mechanism for accommodating insertions and deletions within helices may involve localized interconversions between 3(10), alpha, and pi helical structures.

    Related Citations: 
    • The Crystal Structure of Human Deoxyhaemoglobin at 1.74 A Resolution
      Fermi, G., Perutz, M.F., Shaanan, B., Fourme, R.
      (1984) J Mol Biol 175: 159
    Organizational Affiliation: 

    Department of Biochemistry, University of Iowa, Iowa City 52242.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
PROTEIN (HEMOGLOBIN ALPHA CHAIN)
A, C
141Homo sapiensMutation(s): 0 
Gene Names: HBA1, HBA2
Find proteins for P69905 (Homo sapiens)
Go to UniProtKB:  P69905
NIH Common Fund Data Resources
PHAROS  P69905
GTEx  ENSG00000188536GTEx  ENSG00000206172

Find similar proteins by: Sequence  |  Structure

Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
PROTEIN (HEMOGLOBIN BETA CHAIN)
B, D
146Homo sapiensMutation(s): 0 
Gene Names: HBB
Find proteins for P68871 (Homo sapiens)
Go to UniProtKB:  P68871
NIH Common Fund Data Resources
PHAROS  P68871
GTEx  ENSG00000244734
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
HEM
Query on HEM
Download CCD File 
A, B, C, D
PROTOPORPHYRIN IX CONTAINING FE
C34 H32 Fe N4 O4
KABFMIBPWCXCRK-RGGAHWMASA-L		 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.50 Å
  • R-Value Free: 0.208 
  • R-Value Work: 0.167 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 63.3α = 90
b = 83.6β = 99.4
c = 53.8γ = 90
Software Package:
Software NamePurpose
PROLSQrefinement
SDMSdata reduction
SDMSdata scaling

Structure Validation

View Full Validation Report


View more in-depth experimental data

Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1998-11-11
    Type: Initial release
  • Version 1.1: 2008-04-27
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance