1bbb Summary

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A THIRD QUATERNARY STRUCTURE OF HUMAN HEMOGLOBIN A AT 1.7-ANGSTROMS RESOLUTION

The structure was published by Silva, M.M., Rogers, P.H., and Arnone, A., in 1992 in a paper entitled "A third quaternary structure of human hemoglobin A at 1.7-A resolution." (abstract).

This crystal structure was determined using X-ray diffraction at a resolution of 1.7 Å and deposited in 1992.

The experimental data on which the structure is based was also deposited.

This PDB entry contains a complex of 2 biomacromolecules, namely HEMOGLOBIN A (CARBONMONOXY) (ALPHA CHAIN) and HEMOGLOBIN A (CARBONMONOXY) (BETA CHAIN).

It also contains one or more heterogenic compounds (e.g., ligands, co-factors, ions, modified amino acids, etc.); see here for a complete list.

The molecule most likely forms heterotetramers.

The following tables show cross-reference information to other databases (to obtain a list of all PDB entries sharing the same property or classification, click on the magnifying glass icon):


Chain Name UniProt Name of source organism % of UniProt sequence present in the sample Residues in the sample molecules % of residues observed
A HEMOGLOBIN A (CARBONMONOXY) (ALPHA CHAIN) P69905 (2-142) (HBA_HUMAN)search Homo sapienssearch 98% 141 100%
C HEMOGLOBIN A (CARBONMONOXY) (ALPHA CHAIN) P69905 (2-142) (HBA_HUMAN)search Homo sapienssearch 98% 141 100%
B HEMOGLOBIN A (CARBONMONOXY) (BETA CHAIN) P68871 (2-147) (HBB_HUMAN)search Homo sapienssearch 98% 146 100%
D HEMOGLOBIN A (CARBONMONOXY) (BETA CHAIN) P68871 (2-147) (HBB_HUMAN)search Homo sapienssearch 98% 146 100%


This entry contains 2 unique UniProt proteins:

UniProt accession Name Organism PDB
P69905 (2 - 142) HEMOGLOBIN A (CARBONMONOXY) (ALPHA CHAIN) Homo sapiens
P68871 (2 - 147) HEMOGLOBIN A (CARBONMONOXY) (BETA CHAIN) Homo sapiens

Chain Structural classification (SCOP) Structural classification (CATH) Sequence family (Pfam)
A, C (P69905) Globinssearch Globinssearch PF00042: Globinsearch
B, D (P68871) Globinssearch Globinssearch PF00042: Globinsearch

Chain ID Molecular function (GO) Cellular component (GO) Biological process (GO)
A, C (P69905) heme bindingsearch oxygen bindingsearch iron ion bindingsearch protein bindingsearch metal ion bindingsearch oxygen transporter activitysearch haptoglobin bindingsearch peroxidase activitysearch hemoglobin complexsearch extracellular regionsearch extracellular vesicular exosomesearch endocytic vesicle lumensearch cytosolic small ribosomal subunitsearch blood microparticlesearch haptoglobin-hemoglobin complexsearch cytosolsearch membranesearch small molecule metabolic processsearch protein heterooligomerizationsearch hydrogen peroxide catabolic processsearch receptor-mediated endocytosissearch response to hydrogen peroxidesearch transportsearch oxygen transportsearch bicarbonate transportsearch positive regulation of cell deathsearch oxidation-reduction processsearch
B, D (P68871) iron ion bindingsearch heme bindingsearch protein bindingsearch metal ion bindingsearch oxygen transporter activitysearch haptoglobin bindingsearch peroxidase activitysearch oxygen bindingsearch hemoglobin bindingsearch hemoglobin complexsearch cytosolsearch endocytic vesicle lumensearch extracellular regionsearch extracellular vesicular exosomesearch haptoglobin-hemoglobin complexsearch blood microparticlesearch regulation of blood vessel sizesearch bicarbonate transportsearch oxygen transportsearch protein heterooligomerizationsearch small molecule metabolic processsearch renal absorptionsearch positive regulation of cell deathsearch response to hydrogen peroxidesearch platelet aggregationsearch positive regulation of nitric oxide biosynthetic processsearch receptor-mediated endocytosissearch transportsearch blood coagulationsearch nitric oxide transportsearch oxidation-reduction processsearch hydrogen peroxide catabolic processsearch regulation of blood pressuresearch

Chain InterPro annotation
A, C Globinsearch Haemoglobin, alphasearch Haemoglobin, pisearch Globin-likesearch Globin, structural domainsearch
B, D Globinsearch Haemoglobin, betasearch Globin-likesearch Globin, structural domainsearch