Cited by 15Hemoglobin structure and functionHemoglobinopathies and Related DisordersBiomedical and Chemical Research

ATP-induced Tetramerization and Cooperativity in Hemoglobin of Lower Vertebrates

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Bonafe, Carlos F.S., Matsukuma, Adriana Y., Matsuura, Maria S.A.·1999·Journal of Biological Chemistry

Abstract

The importance of intraerythrocytic organic phosphates in the allosteric control of oxygen binding to vertebrate hemoglobin (Hb) is well recognized and is correlated with conformational changes of the tetramer. ATP is a major allosteric effector of snake Hb, since the absence of this nucleotide abolishes the Hb cooperativity. This effect may be related to the molecular weight of about 32,000 for this Hb, which is compatible with the dimeric form. ATP induces a pH-dependent tetramerization of deoxyHb that leads to the recovery of cooperativity. This phenomenon may be partially explained by two amino acid replacements in the beta chains (CD2 Glu-43 --> Thr and G3 Glu-101 --> Val), which result in the loss of two negative charges at the alpha1beta2 interface and favors the dissociation into dimers. The ATP-dependent dimer left arrow over right arrow tetramer may be physiologically important among ancient animal groups that have similar mutations and display variations in blood pH that are governed by these animals' metabolic state. The enormous loss of free energy of association that accompanies Hb oxygenation, and which is also observed at a much lower intensity in higher vertebrate Hbs, must be taken into consideration in allosteric models. We propose that the transition from a myoglobin-like protein to an allosteric one may be of evolutionary significance.

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Crossref · 10.1074/jbc.274.3.1196

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  • Increased avidity through multimerisation is well known, but it remains less well characterised in the context of transcription factor biology.

    “While increased avidity through multimerisation is well known (e.g. haemoglobin 69,70 ), it remains less well characterised in the context of TF biology 71 .”

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Authors
Bonafe, C. F. S., Matsukuma, A. Y., & Matsuura, M. S. A.
Affiliations
Universidade Estadual de Campinas (UNICAMP) (BR)
Corresponding author
Matsuura, Maria S.A.
Venue
Journal of Biological Chemistry
Publisher
Elsevier BV
Published
1999-01
Volume
274
Issue
3
Pages
1196-1198
ISSN
0021-9258 (ISSN-L)
OpenAlex
W2088940183
Cited by
15
References
28
Citations by year
2025: 1 · 2019: 1 · 2018: 1 · 2016: 1 · 2015: 1
FWCI
0.35
Type
journal article
Language
en
Open access
Locations
  • Journal of Biological Chemistry (publishedVersion, cc-by)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Hemoglobin structure and function
  • Health Sciences › Medicine › Genetics › Hemoglobinopathies and Related Disorders
  • Health Sciences › Medicine › Surgery › Biomedical and Chemical Research
Keywords
hemoglobin, ATP, allosteric cooperativity, tetramerization, lower vertebrates, organic phosphates, deoxyhemoglobin, blood pH, oxygen binding, free energy of association
MeSH terms
Adenosine Triphosphate, Animals, Female, Hemoglobins, Humans, Hydrogen-Ion Concentration, Male, Models, Chemical, Molecular Weight, Oxygen, Organophosphates, Protein Conformation, Snakes

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