1y5f Summary

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T-To-T(High) quaternary transitions in human hemoglobin: betaL96A deoxy low-salt (1 test set)

The structure was published by Kavanaugh, J.S., Rogers, P.H., and Arnone, A., in 2005 in a paper entitled "Crystallographic evidence for a new ensemble of ligand-induced allosteric transitions in hemoglobin: the T-to-T(high) quaternary transitions." (abstract).

This crystal structure was determined using X-ray diffraction at a resolution of 2.14 Å and deposited in 2004.

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

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

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