1hac Summary

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CROSSLINKED HAEMOGLOBIN

The structure was published by Schumacher, M.A., Zheleznova, E.E., Poundstone, K.S., Kluger, R., Jones, R.T., and Brennan, R.G., in 1997 in a paper entitled "Allosteric intermediates indicate R2 is the liganded hemoglobin end state." (abstract).

This crystal structure was determined using X-ray diffraction at a resolution of 2.6 Å and deposited in 1996.

The experimental data on which the structure is based was not deposited.

This PDB entry contains a complex of 2 biomacromolecules, namely HEMOGLOBIN A.

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 P69905 (2-142) (HBA_HUMAN)search Homo sapienssearch 98% 141 100%
C HEMOGLOBIN A P69905 (2-142) (HBA_HUMAN)search Homo sapienssearch 98% 141 100%
B HEMOGLOBIN A P68871 (2-147) (HBB_HUMAN)search Homo sapienssearch 98% 146 100%
D HEMOGLOBIN A 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 Homo sapiens
P68871 (2 - 147) HEMOGLOBIN A 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) Biological process (GO) Cellular component (GO)
A, C (P69905) heme bindingsearch oxygen bindingsearch iron ion bindingsearch oxygen transporter activitysearch protein bindingsearch peroxidase activitysearch metal ion bindingsearch haptoglobin bindingsearch oxygen transportsearch small molecule metabolic processsearch bicarbonate transportsearch response to hydrogen peroxidesearch hydrogen peroxide catabolic processsearch positive regulation of cell deathsearch oxidation-reduction processsearch transportsearch protein heterooligomerizationsearch hemoglobin complexsearch membranesearch extracellular regionsearch endocytic vesicle lumensearch extracellular vesicular exosomesearch blood microparticlesearch cytosolsearch cytosolic small ribosomal subunitsearch haptoglobin-hemoglobin complexsearch
B, D (P68871) oxygen bindingsearch iron ion bindingsearch heme bindingsearch protein bindingsearch oxygen transporter activitysearch metal ion bindingsearch haptoglobin bindingsearch hemoglobin bindingsearch peroxidase activitysearch oxygen transportsearch platelet aggregationsearch hydrogen peroxide catabolic processsearch positive regulation of cell deathsearch bicarbonate transportsearch small molecule metabolic processsearch transportsearch regulation of blood pressuresearch protein heterooligomerizationsearch renal absorptionsearch nitric oxide transportsearch blood coagulationsearch response to hydrogen peroxidesearch positive regulation of nitric oxide biosynthetic processsearch regulation of blood vessel sizesearch oxidation-reduction processsearch hemoglobin complexsearch cytosolsearch extracellular regionsearch endocytic vesicle lumensearch haptoglobin-hemoglobin complexsearch extracellular vesicular exosomesearch blood microparticlesearch

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