1y45 Summary

pdbe.org/1y45
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T-To-T(high) quaternary transitions in human hemoglobin: betaP36A deoxy low-salt (10 test sets)

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