Crystal Structures of HbA2 and HbE and Modeling of Hemoglobin δ4:  Interpretation of the Thermal Stability and the Antisickling Effect of HbA2 and Identification of …

U Sen, J Dasgupta, D Choudhury, P Datta… - Biochemistry, 2004 - ACS Publications
Hemoglobin A2 (α2δ2) is an important hemoglobin variant which is a minor component (2−
3%) in the circulating red blood cells, and its elevated concentration in β-thalassemia is a …

[HTML][HTML] Irreversible alterations in the hemoglobin structure affect oxygen binding in human packed red blood cells

E Szczesny-Malysiak, J Dybas, A Blat, K Bulat… - … et Biophysica Acta (BBA …, 2020 - Elsevier
The ability of hemoglobin (Hb) to transport respiratory gases is directly linked to its
quaternary structure properties and reversible changes between T (tense) and R (relax) …

X-ray crystallography of hemoglobins

MK Safo, DJ Abraham - Hemoglobin Disorders: Molecular Methods and …, 2003 - Springer
X-ray crystallography has played a key role in understanding the relationship between
protein structure and physiological function. In particular, X-ray analysis of hemoglobin (Hb) …

Effect of T‐R conformational change on sickle‐cell hemoglobin interactions and aggregation

SM Vaiana, MA Rotter, A Emanuele… - Proteins: Structure …, 2005 - Wiley Online Library
We compare the role of a conformational switch and that of a point mutation in the
thermodynamic stability of a protein solution and in the consequent propensity toward …

Structure of relaxed-state human hemoglobin: insight into ligand uptake, transport and release

JD Jenkins, FN Musayev… - … Section D: Biological …, 2009 - scripts.iucr.org
Hemoglobin was one of the first protein structures to be determined by X-ray crystallography
and served as a basis for the two-state MWC model for the mechanism of allosteric proteins …

[HTML][HTML] Assembly of Human Hemoglobin: STUDIES WITH ESCHERICHIA COLI-EXPRESSED α-GLOBIN

MT Sanna, A Razynska, M Karavitis, AP Koley… - Journal of Biological …, 1997 - ASBMB
The α-globin of human hemoglobin was expressed in Escherichia coli and was refolded with
heme in the presence and in the absence of native β-chains. The functional and structural …

[HTML][HTML] Spontaneous quaternary and tertiary TR transitions of human hemoglobin in molecular dynamics simulation

JS Hub, MB Kubitzki, BL de Groot - PLoS computational biology, 2010 - journals.plos.org
We present molecular dynamics simulations of unliganded human hemoglobin (Hb) A under
physiological conditions, starting from the R, R2, and T state. The simulations were carried …

Glycated human hemoglobin (HbA1c): functional characteristics and molecular modeling studies

MC De Rosa, MT Sanna, I Messana, M Castagnola… - Biophysical …, 1998 - Elsevier
A minor hemoglobin component of human red cell hemolysate, HbA1c, is the result of the
non-enzymatic reaction of glucose with the α-amino groups of the valine residues at the N …

[HTML][HTML] Transfer of human α-to β-hemoglobin via its chaperone protein: evidence for a new state

V Baudin-Creuza, C Vasseur-Godbillon, C Pato… - Journal of Biological …, 2004 - ASBMB
The α-hemoglobin-stabilizing protein (AHSP), a small protein of 102 amino acids, is
synthesized in red blood cell precursors. It binds specifically to α-hemoglobin (α-Hb) …

Interface Sliding As Illustrated by the Multiple Quaternary Structures of Liganded Hemoglobin,

TC Mueser, PH Rogers, A Arnone - Biochemistry, 2000 - ACS Publications
Initial crystallographic studies suggested that fully liganded mammalian hemoglobin can
adopt only a single quaternary structure, the quaternary R structure. However, more recent …