2qjo

[[Image:2qjo.jpg|left|200px]]<br /><applet load="2qjo" size="350" color="white" frame="true" align="right" spinBox="true"

caption="2qjo, resolution 2.60&Aring;" />

'''crystal structure of a bifunctional NMN adenylyltransferase/ADP ribose pyrophosphatase (NadM) complexed with ADPRP and NAD from Synechocystis sp.'''<br />

==Overview==

Bacterial NadM-Nudix is a bifunctional enzyme containing a nicotinamide mononucleotide (NMN) adenylyltransferase and an ADP-ribose (ADPR) pyrophosphatase domain. While most members of this enzyme family, such as that from a model cyanobacterium Synechocystis sp., are involved primarily in nicotinamide adenine dinucleotide (NAD) salvage/recycling pathways, its close homolog in a category-A biodefense pathogen, Francisella tularensis, likely plays a central role in a recently discovered novel pathway of NAD de novo synthesis. The crystal structures of NadM-Nudix from both species, including their complexes with various ligands and catalytic metal ions, revealed detailed configurations of the substrate binding and catalytic sites in both domains. The structure of the N-terminal NadM domain may be exploited for designing new antitularemia therapeutics. The ADPR binding site in the C-terminal Nudix domain is substantially different from that of Escherichia coli ADPR pyrophosphatase, and is more similar to human NUDT9. The latter observation provided new insights into the ligand binding mode of ADPR-gated Ca(2+) channel TRPM2.

 

==About this Structure==

2QJO is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Synechocystis_sp. Synechocystis sp.] with <scene name='pdbligand=SO4:'>SO4</scene>, <scene name='pdbligand=APR:'>APR</scene>, <scene name='pdbligand=NAD:'>NAD</scene> and <scene name='pdbligand=POP:'>POP</scene> as [http://en.wikipedia.org/wiki/ligands ligands]. Known structural/functional Sites: <scene name='pdbsite=AC1:So4+Binding+Site+For+Residue+A+402'>AC1</scene>, <scene name='pdbsite=AC2:So4+Binding+Site+For+Residue+A+403'>AC2</scene>, <scene name='pdbsite=AC3:So4+Binding+Site+For+Residue+A+404'>AC3</scene>, <scene name='pdbsite=AC4:So4+Binding+Site+For+Residue+B+401'>AC4</scene>, <scene name='pdbsite=AC5:Apr+Binding+Site+For+Residue+A+501'>AC5</scene>, <scene name='pdbsite=AC6:Nad+Binding+Site+For+Residue+A+601'>AC6</scene>, <scene name='pdbsite=AC7:Pop+Binding+Site+For+Residue+A+701'>AC7</scene>, <scene name='pdbsite=AC8:Apr+Binding+Site+For+Residue+B+502'>AC8</scene>, <scene name='pdbsite=AC9:Nad+Binding+Site+For+Residue+B+602'>AC9</scene>, <scene name='pdbsite=BC1:Pop+Binding+Site+For+Residue+B+702'>BC1</scene>, <scene name='pdbsite=BC2:Apr+Binding+Site+For+Residue+C+503'>BC2</scene>, <scene name='pdbsite=BC3:Nad+Binding+Site+For+Residue+C+603'>BC3</scene> and <scene name='pdbsite=BC4:Pop+Binding+Site+For+Residue+C+703'>BC4</scene>. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2QJO OCA].

 

==Reference==

Bifunctional NMN Adenylyltransferase/ADP-Ribose Pyrophosphatase: Structure and Function in Bacterial NAD Metabolism., Huang N, Sorci L, Zhang X, Brautigam CA, Li X, Raffaelli N, Magni G, Grishin NV, Osterman AL, Zhang H, Structure. 2008 Feb;16(2):196-209. PMID:[http://ispc.weizmann.ac.il//pmbin/getpm?pmid=18275811 18275811]

[[Category: Single protein]]

[[Category: Synechocystis sp.]]

[[Category: Brautigan, C.]]

[[Category: Grishin, N V.]]

[[Category: Huang, N.]]

[[Category: Magni, G.]]

[[Category: Osterman, A.]]

[[Category: Raffaelli, N.]]

[[Category: Sorci, L.]]

[[Category: Zhang, H.]]

[[Category: Zhang, X.]]