1yvq Summary

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The low salt (PEG) crystal structure of CO Hemoglobin E (betaE26K) approaching physiological pH (pH 7.5)

A publication describing this structure is not available. The depositing authors are Malashkevich, V.N.search; Balazs, T.C.search; Almo, S.C.search; Hirsch, R.E.search

This crystal structure was determined using X-ray diffraction at a resolution of 1.8 Å and deposited in 2005.

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

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