Thermal stability and structure of glyceraldehyde-3-phosphate dehydrogenase from the coral Acropora millepora

Corals are vulnerable to increasing ocean temperatures. It is known that elevated temperatures lead to the breakdown of an essential mutualistic relationship with photosynthetic algae. The molecular mechanisms of this temperature-dependent loss of symbiosis are less well understood. Here, the therma...

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Published inRSC advances Vol. 11; no. 17; pp. 10364 - 10374
Main Authors Perez, Astrid M, Wolfe, Jacob A, Schermerhorn, Janse T, Qian, Yiwen, Cela, Bekim A, Kalinowski, Cody R, Largoza, Garrett E, Fields, Peter A, Brandt, Gabriel S
Format Journal Article
LanguageEnglish
Published England Royal Society of Chemistry 10.03.2021
The Royal Society of Chemistry
Subjects
Chemistry
Corals
Dehydrogenases
Enzymes
High temperature
Monomers
Occupancy
Photosynthesis
Structural stability
Symbiosis
Temperature dependence
Thermal stability
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Summary:Corals are vulnerable to increasing ocean temperatures. It is known that elevated temperatures lead to the breakdown of an essential mutualistic relationship with photosynthetic algae. The molecular mechanisms of this temperature-dependent loss of symbiosis are less well understood. Here, the thermal stability of a critical metabolic enzyme, glyceraldehyde-3-phosphate dehydrogenase, from the stony coral was found to increase significantly in the presence of its cofactor NAD . Determination of the structure of the cofactor-enzyme complex (PDB ID 6PX2) revealed variable NAD occupancy across the four monomers of the tetrameric enzyme. The structure of the fully occupied monomers was compared to those with partial cofactor occupancy, identifying regions of difference that may account for the increased thermal stability.
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ISSN:2046-2069
2046-2069
DOI:10.1039/d0ra10119b