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Hemoglobin Abruzzo (beta143 (H21) His replaced by Arg). Consequences of altering the 2,3-diphosphoglycerate binding site.

Publication ,  Journal Article
Bonaventura, C; Bonaventura, J; Amiconi, G; Tentori, L; Brunori, M; Antonini, E
Published in: The Journal of biological chemistry
August 1975

Hemoglobin Abruzzo is an abnormal human hemoglobin with a substitution at a residue known to be involved in the binding of 2,3-diphosphoglyceric acid. It has increased oxygen affinity and reduced heme-heme interaction in the absence of organic or inorganic phosphate cofactors. In inorganic phosphate buffers the Bohr effect and heme-heme interaction are normal, but the oxygen affinity remains higher than that of hemoglobin A. CO combination in inorganic phosphate is more strongly autocatalytic than in normal hemoglobin and a slower rate of oxygen dissociation is observed. Although many of the functional differences of this variant may be attributed to the high oxygen affinity of the mutant beta chains, the interactions between subunits are also affected by the histidine to arginine substitution at beta143. Stripped hemoglobin Abruzzo appears to be significantly more dissociated than hemoglobin A. Kinetic studies indicate that interaction with organic or inorganic phosphates decreases its subunit dissociation. In all of the functional properties examined, hemoglobin Abruzzo is more sensitive to the allosteric influence of organic and inorganic anions than is hemoglobin A.

Duke Scholars

Published In

The Journal of biological chemistry

DOI

EISSN

1083-351X

ISSN

0021-9258

Publication Date

August 1975

Volume

250

Issue

16

Start / End Page

6273 / 6277

Related Subject Headings

  • Photochemistry
  • Oxygen
  • Oxidation-Reduction
  • Kinetics
  • Italy
  • Hydrogen-Ion Concentration
  • Humans
  • Histidine
  • Hemoglobins, Abnormal
  • Diphosphoglyceric Acids
 

Citation

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ICMJE
MLA
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Bonaventura, C., Bonaventura, J., Amiconi, G., Tentori, L., Brunori, M., & Antonini, E. (1975). Hemoglobin Abruzzo (beta143 (H21) His replaced by Arg). Consequences of altering the 2,3-diphosphoglycerate binding site. The Journal of Biological Chemistry, 250(16), 6273–6277. https://doi.org/10.1016/s0021-9258(19)41061-2
Bonaventura, C., J. Bonaventura, G. Amiconi, L. Tentori, M. Brunori, and E. Antonini. “Hemoglobin Abruzzo (beta143 (H21) His replaced by Arg). Consequences of altering the 2,3-diphosphoglycerate binding site.The Journal of Biological Chemistry 250, no. 16 (August 1975): 6273–77. https://doi.org/10.1016/s0021-9258(19)41061-2.
Bonaventura C, Bonaventura J, Amiconi G, Tentori L, Brunori M, Antonini E. Hemoglobin Abruzzo (beta143 (H21) His replaced by Arg). Consequences of altering the 2,3-diphosphoglycerate binding site. The Journal of biological chemistry. 1975 Aug;250(16):6273–7.
Bonaventura, C., et al. “Hemoglobin Abruzzo (beta143 (H21) His replaced by Arg). Consequences of altering the 2,3-diphosphoglycerate binding site.The Journal of Biological Chemistry, vol. 250, no. 16, Aug. 1975, pp. 6273–77. Epmc, doi:10.1016/s0021-9258(19)41061-2.
Bonaventura C, Bonaventura J, Amiconi G, Tentori L, Brunori M, Antonini E. Hemoglobin Abruzzo (beta143 (H21) His replaced by Arg). Consequences of altering the 2,3-diphosphoglycerate binding site. The Journal of biological chemistry. 1975 Aug;250(16):6273–6277.

Published In

The Journal of biological chemistry

DOI

EISSN

1083-351X

ISSN

0021-9258

Publication Date

August 1975

Volume

250

Issue

16

Start / End Page

6273 / 6277

Related Subject Headings

  • Photochemistry
  • Oxygen
  • Oxidation-Reduction
  • Kinetics
  • Italy
  • Hydrogen-Ion Concentration
  • Humans
  • Histidine
  • Hemoglobins, Abnormal
  • Diphosphoglyceric Acids