1DXV

HIGH-RESOLUTION X-RAY STUDY OF DEOXY RECOMBINANT HUMAN HEMOGLOBINS SYNTHESIZED FROM BETA-GLOBINS HAVING MUTATED AMINO TERMINI


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.7 Å

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

High-resolution X-ray study of deoxy recombinant human hemoglobins synthesized from beta-globins having mutated amino termini.

Kavanaugh, J.S.Rogers, P.H.Arnone, A.

(1992) Biochemistry 31: 8640-8647

  • Primary Citation of Related Structures:  1DXT, 1DXU

  • PubMed Abstract: 
  • The crystal structures of three mutant hemoglobins reconstituted from recombinant beta chains and authentic human alpha chains have been determined in the deoxy state at 1.8-A resolution. The primary structures of the mutant hemoglobins differ at the ...

    The crystal structures of three mutant hemoglobins reconstituted from recombinant beta chains and authentic human alpha chains have been determined in the deoxy state at 1.8-A resolution. The primary structures of the mutant hemoglobins differ at the beta-chain amino terminus. One mutant, beta Met, is characterized by the addition of a methionine at the amino terminus. The other two hemoglobins are characterized by substitution of Val 1 beta with either a methionine, beta V1M, or an alanine, beta V1A. All the mutation-induced structural perturbations are small intrasubunit changes that are localized to the immediate vicinity of the beta-chain amino terminus. In the beta Met and beta V1A mutants, the mobility of the beta-chain amino terminus increases and the electron density of an associated inorganic anion is decreased. In contrast, the beta-chain amino terminus of the beta V1M mutant becomes less mobile, and the inorganic anion binds with increased affinity. These structural differences can be correlated with functional data for the mutant hemoglobins [Doyle, M. L., Lew, G., DeYoung, A., Kwiatkowski, L., Noble, R. W., & Ackers, G. K. (1992) Biochemistry preceding paper is this issue] as well as with the properties of ruminant hemoglobins and a mechanism [Perutz, M., & Imai, K. (1980) J. Mol. Biol. 136, 183-191] that relates the intrasubunit interactions of the beta-chain amino terminus to changes in oxygen affinity. Since the structures of the mutant deoxyhemoglobins show only subtle differences from the structure of deoxyhemoglobin A, it is concluded that any of the three hemoglobins could probably function as a surrogate for hemoglobin A.(ABSTRACT TRUNCATED AT 250 WORDS)


    Related Citations: 
    • Functional Properties of Human Hemoglobins Synthesized from Recombinant Mutant Beta-Globins
      Doyle, M.L.,Lew, G.,Deyoung, A.,Kwiatkowski, L.,Wierzbra, A.,Noble, R.W.,Ackers, G.K.
      (1992) Biochemistry 31: 8629


    Organizational Affiliation

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




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
HEMOGLOBIN (DEOXY) (ALPHA CHAIN)
A, C
141Homo sapiensGene 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 (DEOXY) (BETA CHAIN)
B, D
146Homo sapiensGene 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
SO4
Query on SO4

Download SDF File 
Download CCD File 
B, D
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
HEM
Query on HEM

Download SDF File 
Download CCD File 
A, B, C, D
PROTOPORPHYRIN IX CONTAINING FE
HEME
C34 H32 Fe N4 O4
KABFMIBPWCXCRK-RGGAHWMASA-L
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.7 Å
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 63.200α = 90.00
b = 83.600β = 99.30
c = 53.800γ = 90.00
Software Package:
Software NamePurpose
PROLSQrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1993-10-31
    Type: Initial release
  • Version 1.1: 2008-03-24
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Advisory, Version format compliance