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3B20

Crystal structure of Glyceraldehyde-3-Phosphate Dehydrogenase complexed with NADfrom Synechococcus elongatus"

Summary for 3B20
Entry DOI10.2210/pdb3b20/pdb
DescriptorGlyceraldehyde 3-phosphate dehydrogenase (NADP+), SULFATE ION, NICOTINAMIDE-ADENINE-DINUCLEOTIDE, ... (4 entities in total)
Functional Keywordsalpha/beta fold, oxidoreductase
Biological sourceSynechococcus elongatus
Total number of polymer chains6
Total formula weight227325.73
Authors
Matsumura, H.,Kai, A.,Maeda, T.,Inoue, T. (deposition date: 2011-07-17, release date: 2012-01-11, Last modification date: 2024-03-13)
Primary citationMatsumura, H.,Kai, A.,Maeda, T.,Tamoi, M.,Satoh, A.,Tamura, H.,Hirose, M.,Ogawa, T.,Kizu, N.,Wadano, A.,Inoue, T.,Shigeoka, S.
Structure Basis for the Regulation of Glyceraldehyde-3-Phosphate Dehydrogenase Activity via the Intrinsically Disordered Protein CP12.
Structure, 19:1846-1854, 2011
Cited by
PubMed Abstract: The reversible formation of a glyceraldehyde-3-phosphate dehydrogenase (GAPDH)-CP12-phosphoribulokinase (PRK) supramolecular complex, identified in oxygenic photosynthetic organisms, provides light-dependent Calvin cycle regulation in a coordinated manner. An intrinsically disordered protein (IDP) CP12 acts as a linker to sequentially bind GAPDH and PRK to downregulate both enzymes. Here, we report the crystal structures of the ternary GAPDH-CP12-NAD and binary GAPDH-NAD complexes from Synechococcus elongates. The GAPDH-CP12 complex structure reveals that the oxidized CP12 becomes partially structured upon GAPDH binding. The C-terminus of CP12 is inserted into the active-site region of GAPDH, resulting in competitive inhibition of GAPDH. This study also provides insight into how the GAPDH-CP12 complex is dissociated by a high NADP(H)/NAD(H) ratio. An unexpected increase in negative charge potential that emerged upon CP12 binding highlights the biological function of CP12 in the sequential assembly of the supramolecular complex.
PubMed: 22153507
DOI: 10.1016/j.str.2011.08.016
PDB entries with the same primary citation
Experimental method
X-RAY DIFFRACTION (2.398 Å)
Structure validation

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数据于2024-10-30公开中

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