[HTML][HTML] Semihemoglobins, high oxygen affinity dimeric forms of human hemoglobin respond efficiently to allosteric effectors without forming tetramers

A Tsuneshige, K Kanaori, U Samuni, D Danstker… - Journal of Biological …, 2004 - ASBMB
Significant reduction in oxygen affinity resulting from interactions between heterotropic
allosteric effectors and hemoglobin in not only the unligated derivative but also the fully …

Heterotropic effectors control the hemoglobin function by interacting with its T and R states—a new view on the principle of allostery

A Tsuneshige, SI Park, T Yonetani - Biophysical chemistry, 2002 - Elsevier
Careful analyses of precise oxygenation curves of hemoglobin (Hb) clearly indicate that,
contrary to the common belief, allosteric effectors exert a dramatic control of the oxygenation …

Recombinant hemoglobins with low oxygen affinity and high cooperativity

CH Tsai, C Ho - Biophysical chemistry, 2002 - Elsevier
By introducing an additional H-bond in the α1β2 subunit interface or altering the charge
properties of the amino acid residues in the α1β1 subunit interface of the hemoglobin …

Hemoglobin tertiary structural change on ligand binding its role in the co-operative mechanism

BR Gelin, AWM Lee, M Karplus - Journal of molecular biology, 1983 - Elsevier
Abstract Analysis of the tertiary structural alterations in hemoglobin induced by ligand
binding demonstrates that an allosteric core composed of the heme, histidine F8, the FG …

Allosteric proteins: Lessons to be learned from the hemoglobin intermediates

M Perrella, R Russo - Physiology, 2003 - journals.physiology.org
Allosteric proteins, such as hemoglobin, are assemblies of functional units, which undergo
quaternary structural transitions in response to concentration changes of a specific ligand …

[HTML][HTML] Asymmetric cooperativity in a symmetric tetramer: human hemoglobin

GK Ackers, JM Holt - Journal of biological chemistry, 2006 - ASBMB
A longstanding challenge in macromolecular biochemistry has been the question of how the
four “active site” hemes of human hemoglobin (Hb) interact cooperatively over widely …

[HTML][HTML] Allosteric effectors influence the tetramer stability of both R-and T-states of hemoglobin A

G Schay, L Smeller, A Tsuneshige, T Yonetani… - Journal of biological …, 2006 - ASBMB
The contribution of heterotropic effectors to hemoglobin allostery is still not completely
understood. With the recently proposed global allostery model, this question acquires crucial …

[PDF][PDF] Allosteric effectors of hemoglobin: past, present and future

MK Safo, S Bruno - Chemistry and biochemistry of oxygen therapeutics …, 2011 - akbara.ac.id
Hemoglobin (Hb) remains the most studied and understood example of an allosteric protein.
It exists in equilibrium between a tense or T state (unliganded or deoxygenated Hb) and a …

New look at hemoglobin allostery

Y Yuan, MF Tam, V Simplaceanu, C Ho - Chemical reviews, 2015 - ACS Publications
Hemoglobin (Hb) is a truly remarkable molecule. Human adult hemoglobin (Hb A) has a
tetrameric structure consisting of two α-chains with 141 amino acids each and two β-chains …

A tertiary two-state allosteric model for hemoglobin

ER Henry, S Bettati, J Hofrichter, WA Eaton - Biophysical chemistry, 2002 - Elsevier
The two-state allosteric model of Monod, Wyman, and Changeux (MWC) provides an
excellent description of homotropic effects in a vast array of equilibrium and kinetic …