1SI4 Oxygen Storage Transport date Feb 27, 2004
title Crystal Structure Of Human Hemoglobin A2 (In R2 State) At 2.2 A Resolution
authors U.Sen, J.Dasgupta, D.Choudhury, P.Datta, A.Chakrabarti, S.B.Chakrabarty, A.Chakrabarty, J.K.Dattagupta
compound source
Molecule: Hemoglobin Alpha Chain
Chain: A, C
Organism_scientific: Homo Sapiens
Organism_common: Human
Organism_taxid: 9606
Tissue: Beta Thalassemia Minor Blood

Molecule: Hemoglobin Delta Chain
Chain: B, D

Organism_scientific: Homo Sapiens
Organism_common: Human
Organism_taxid: 9606
Tissue: Beta Thalassemia Minor Blood
symmetry Space Group: P 21 21 21
R_factor 0.218 R_Free 0.258
crystal
cell
length a length b length c angle alpha angle beta angle gamma
60.450 88.186 104.595 90.00 90.00 90.00
method X-Ray Diffractionresolution 2.20 Å
ligand CYN, HEM enzyme
related structures by homologous chain: 1Y4R, 1YH9
Gene
Ontology
ChainFunctionProcessComponent
A, C
  • peroxidase activity


  • D, B
  • peroxidase activity


  • Primary referenceCrystal structures of HbA2 and HbE and modeling of hemoglobin delta4: interpretation of the thermal stability and the antisickling effect of HbA2 and identification of the ferrocyanide binding site in Hb., Sen U, Dasgupta J, Choudhury D, Datta P, Chakrabarti A, Chakrabarty SB, Chakrabarty A, Dattagupta JK, Biochemistry 2004 Oct 5;43(39):12477-88. PMID:15449937
    Data retrieval
  • Asymmetric unit, PDB entry: [header only] [complete with coordinates] (113 Kb) [Save to disk]
  • Biological Unit Coordinates (1si4.pdb1.gz) 107 Kb
  • LPC: Ligand-Protein Contacts for 1SI4
  • CSU: Contacts of Structural Units for 1SI4
  • Likely Quarternary Molecular Structure file(s) for 1SI4
  • Retrieve 1SI4 in mmCIF format [Save to disk]
  • SEQRES to COORDINATES correlation for 1SI4 from S2C, [Save to disk]
  • View 1SI4 in 3D
  • Proteopedia, because life has more than 2D.
  • On Jmol, a nice Rasmol like molecule viewer. This is good for easiest viewing of basic structure.
  • On FirstGlance, an excellent tool for a guided tour on the structure components, by E. Martz.
  • Visual 3D analysis of 1SI4
  • Cartoon representation from PDB Cartoon
  • Ramachandran plot from PDBSum
  • Structure-derived information
  • Dipole moment, from Dipole Server at Weizmann Institute
  • Crystal Contacts, from CryCo at Weizmann Institute
  • 3D motif for 1SI4, from MSDmotif at EBI
  • Classification of representative domains in scop (Structural Classification of Proteins)
        - Domain d1si4a_, region A [Jmol] [rasmolscript] [script source]
        - Domain d1si4b_, region B [Jmol] [rasmolscript] [script source]
        - Domain d1si4c_, region C [Jmol] [rasmolscript] [script source]
        - Domain d1si4d_, region D [Jmol] [rasmolscript] [script source]
  • Fold representative 1si4 from FSSP and Dali (Families of Structurally Similar Proteins)
  • Class (fold), Architecture (subfold), Topology, Homologous superfamily from CATH
  • Summaries and structural analyses of PDB data files from PDBSum
  • Identification of Protein Pockets & Cavities at CASTp
  • Sequence-derived information
  • View one-letter amino acid or nucleotide sequence for each chain: [1si4_D] [1si4] [1si4_C] [1si4_A] [1si4_B]
  • SWISS-PROT database: [P69905] [P02042]
  • Belongs to the pore-forming globin (globin) family according to TCDB.
  • Domain organization of [HBA_HUMAN] [HBD_HUMAN] by SWISSPFAM
  • Other resources with information on 1SI4
  • Community annotation for 1SI4 at PDBWiki (http://pdbwiki.org)
  • MMDB (Entrez's Structure Database)
  • Movements, Movies and Images
  • Images from IMB Jena Image Library of Biological Macromolecules.

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