We have refined the crystal structure of deoxyhemoglobin S (beta Glu6-->Val) at 2.05 A resolution to an R-factor of 16.5% (free R=21. 5%) using crystals isomorphous to those originally grown by Wishner and Love. A predominant feature of this crystal form is a double strand of hemoglobin tetramers that has been shown by a variety of techniques to be the fundamental building block of the intracellular sickle cell fiber ...
We have refined the crystal structure of deoxyhemoglobin S (beta Glu6-->Val) at 2.05 A resolution to an R-factor of 16.5% (free R=21. 5%) using crystals isomorphous to those originally grown by Wishner and Love. A predominant feature of this crystal form is a double strand of hemoglobin tetramers that has been shown by a variety of techniques to be the fundamental building block of the intracellular sickle cell fiber. The double strand is stabilized by lateral contacts involving the mutant valine interacting with a pocket between the E and F helices on another tetramer. The new structure reveals some marked differences from the previously refined 3.0 A resolution structure, including several residues in the lateral contact which have shifted by as much as 3.5 A. The lateral contact includes, in addition to the hydrophobic interactions involving the mutant valine, hydrophilic interactions and bridging water molecules at the periphery of the contact. This structure provides further insights into hemoglobin polymerization and may be useful for the structure-based design of therapeutic agents to treat sickle cell disease.
Related Citations:
Refined Crystal Structure of Deoxyhemoglobin S. II. Molecular Interactions in the Crystal Padlan, E.A., Love, W.E. (1985) J Biol Chem 260: 8280
Refined Crystal Structure of Deoxyhemoglobin S. I. Restrained Least-Squares Refinement at 3.0-A Resolution Padlan, E.A., Love, W.E. (1985) J Biol Chem 260: 8272
Intermolecular Interactions in Crystals of Human Deoxy Hemoglobin A, C, F and S Love, W.E., Fitzgerald, P.M.D., Hanson, J.C., Royer Junior, W.E. (1978) Inserm Symp 9: 65
Crystal Structure of Sickle-Cell Deoxyhemoglobin Wishner, B.C., Hanson, J.C., Ringle, W.M., Love, W.E. (1976) Proceedings Of The Symposium On Molecular And Cellular Aspects Of Sickle Cell Disease, Dallas, Texas, December 10, 1975 (in: Dhew Pub (nih) (us), No 76-1007) --: 1
Crystals of Deoxy Sickle Cell Hemoglobin Wishner, B.C., Love, W.E. (1975) Proceedings Of The First National Symposium On Sickle Cell Disease, Washington, D C , June 27-29, 1974 (in: Dhew Pub (nih) (us), No 75-723) --: 85
Crystal Structure of Sickle-Cell Deoxyhemoglobin at 5 A Resolution Wishner, B.C., Ward, K.B., Lattman, E.E., Love, W.E. (1975) J Mol Biol 98: 179
Organizational Affiliation:
Department of Biochemistry and Molecular Biology, University of Massachusetts Medical School, 373 Plantation Street, Worcester, MA 01605, USA.
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