Diphthine synthase

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diphthine synthase
Identifiers
EC no. 2.1.1.98
CAS no. 114514-25-9
Databases
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BRENDA BRENDA entry
ExPASy NiceZyme view
KEGG KEGG entry
MetaCyc metabolic pathway
PRIAM profile
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Gene Ontology AmiGO / QuickGO
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NCBI proteins

In enzymology, a diphthine synthase (EC 2.1.1.98) is an enzyme that catalyzes the chemical reaction

S-adenosyl-L-methionine + 2-(3-carboxy-3-aminopropyl)-L-histidine S-adenosyl-L-homocysteine + 2-[3-carboxy-3-(methylammonio)propyl]-L-histidine

Thus, the two substrates of this enzyme are S-adenosyl methionine and 2-(3-carboxy-3-aminopropyl)-L-histidine, whereas its two products are S-adenosylhomocysteine and [[2-[3-carboxy-3-(methylammonio)propyl]-L-histidine]].

This enzyme belongs to the family of transferases, specifically those transferring one-carbon group methyltransferases. The systematic name of this enzyme class is S-adenosyl-L-methionine:2-(3-carboxy-3-aminopropyl)-L-histidine methyltransferase. Other names in common use include S-adenosyl-L-methionine:elongation factor 2 methyltransferase, and diphthine methyltransferase.

Structural studies

As of late 2007, 84 structures have been solved for this class of enzymes, with PDB accession codes 1VCE, 1VHV, 1WDE, 1WNG, 2DEK, 2DSG, 2DSH, 2DSI, 2DV3, 2DV4, 2DV5, 2DV7, 2DXV, 2DXW, 2DXX, 2E07, 2E08, 2E15, 2E16, 2E17, 2E4N, 2E4R, 2E7R, 2E8H, 2E8Q, 2E8R, 2E8S, 2ED3, 2ED5, 2EEQ, 2EGB, 2EGL, 2EGS, 2EH2, 2EH4, 2EH5, 2EHC, 2EHL, 2EJJ, 2EJK, 2EJZ, 2EK2, 2EK3, 2EK4, 2EK7, 2EKA, 2EL0, 2EL1, 2EL2, 2EL3, 2ELD, 2ELE, 2EMR, 2EMU, 2EN5, 2ENI, 2HR8, 2HUQ, 2HUT, 2HUV, 2HUX, 2OWF, 2OWG, 2OWK, 2OWU, 2OWV, 2P2X, 2P5C, 2P5F, 2P6D, 2P6I, 2P6K, 2P6L, 2P9D, 2PB4, 2PB5, 2PB6, 2PCA, 2PCG, 2PCH, 2PCI, 2PCK, 2PCM, and 2Z6R.

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References


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