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Dihydroxyacetone phosphate, DHAP, in the crystalline state: monomeric and dimeric forms
Katarzyna Slepokura1, Tadeusz Lis
1Faculty of Chemistry, University of Wrocław, Wrocław, Poland. slep@eto.wchuwr.pl
Carbohydrate Research
|January 23, 2010
Summary
Dihydroxyacetone phosphate (DHAP) exists as monomeric and dimeric forms. Researchers crystallized monomeric DHAP salts, some stable at room temperature, and characterized their structures using X-ray crystallography.
Area of Science:
- Biochemistry
- Crystallography
- Chemical Synthesis
Background:
- Dihydroxyacetone phosphate (DHAP) is a key metabolite in glycolysis and gluconeogenesis.
- Understanding the structural forms and stability of DHAP is crucial for biochemical studies.
- Previous research has not fully elucidated the crystalline structures of DHAP salts.
Purpose of the Study:
- To synthesize and characterize crystalline salts of monomeric dihydroxyacetone phosphate (DHAP).
- To isolate and determine the structure of the dimeric form of DHAP.
- To investigate the structural features and stability of these DHAP forms.
Main Methods:
- Crystallization of DHAP from aqueous solutions with calcium chloride or bromide.
- Synthesis of dimeric DHAP diammonium salt via ammonia saturation at low temperature.
- X-ray crystallography for determining the crystal structures of monomeric and dimeric DHAP.
Main Results:
- Four crystalline salts of monomeric DHAP were obtained, with at least one showing room-temperature stability.
- The dimeric DHAP form was isolated as a hydrated diammonium salt.
- X-ray crystallography revealed specific conformations and coordination modes of DHAP in its monomeric salts and the dimeric form.
Conclusions:
- Monomeric DHAP can form stable crystalline salts with calcium, facilitating storage and handling.
- The dimeric DHAP anion adopts a trans isomer conformation with a dioxane ring in a chair form.
- Structural analysis provides insights into DHAP's chemical behavior and potential biological roles.
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