4heb

The Crystal structure of Maf protein of Bacillus subtilis

spinqualitylabelsall models 4heb, resolution 2.26Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 4heb is a 2 chain structure with sequence from Bacillus subtilis. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: UNX Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function NTPPA_BACSU Nucleoside triphosphate pyrophosphatase that hydrolyzes dTTP and UTP. Can also hydrolyze CTP and the modified nucleotides pseudo-UTP, 5-methyl-CTP (m(5)CTP) and 5-methyl-UTP (m(5)UTP) (PubMed:24210219). May have a dual role in cell division arrest and in preventing the incorporation of modified nucleotides into cellular nucleic acids (PubMed:24210219). Publication Abstract from PubMed Maf (for multicopy associated filamentation) proteins represent a large family of conserved proteins implicated in cell division arrest but whose biochemical activity remains unknown. Here, we show that the prokaryotic and eukaryotic Maf proteins exhibit nucleotide pyrophosphatase activity against 5-methyl-UTP, pseudo-UTP, 5-methyl-CTP, and 7-methyl-GTP, which represent the most abundant modified bases in all organisms, as well as against canonical nucleotides dTTP, UTP, and CTP. Overexpression of the Maf protein YhdE in E. coli cells increased intracellular levels of dTMP and UMP, confirming that dTTP and UTP are the in vivo substrates of this protein. Crystal structures and site-directed mutagenesis of Maf proteins revealed the determinants of their activity and substrate specificity. Thus, pyrophosphatase activity of Maf proteins toward canonical and modified nucleotides might provide the molecular mechanism for a dual role of these proteins in cell division arrest and house cleaning. Biochemical and Structural Studies of Conserved Maf Proteins Revealed Nucleotide Pyrophosphatases with a Preference for Modified Nucleotides.,Tchigvintsev A, Tchigvintsev D, Flick R, Popovic A, Dong A, Xu X, Brown G, Lu W, Wu H, Cui H, Dombrowski L, Joo JC, Beloglazova N, Min J, Savchenko A, Caudy AA, Rabinowitz JD, Murzin AG, Yakunin AF Chem Biol. 2013 Oct 22. pii: S1074-5521(13)00347-5. doi:, 10.1016/j.chembiol.2013.09.011. PMID:24210219 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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