3o1c

High resolution crystal structure of histidine triad nucleotide-binding protein 1 (Hint1) C38A mutant from rabbit complexed with Adenosine

spinqualitylabelsall models 3o1c, resolution 1.08Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 3o1c is a 1 chain structure with sequence from Oryctolagus cuniculus. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 1.08Å Ligands: ADN, NA Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function HINT1_RABIT Hydrolyzes adenosine 5'-monophosphoramidate substrates such as AMP-morpholidate, AMP-N-alanine methyl ester, AMP-alpha-acetyl lysine methyl ester and AMP-NH2. Evolutionary Conservation Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf. Publication Abstract from PubMed Nucleoside 5'-O-phosphorothioates are formed in vivo as primary products of hydrolysis of oligo(nucleoside phosphorothioate)s (PS-oligos) that are applied as antisense therapeutic molecules. The biodistribution of PS-oligos and their pharmacokinetics have been widely reported, but little is known about their subsequent decay inside the organism. We suggest that the enzyme responsible for nucleoside 5'-O-monophosphorothioate ((d)NMPS) metabolism could be histidine triad nucleotide-binding protein 1 (Hint-1), a phosphoramidase belonging to the histidine triad (HIT) superfamily that is present in all forms of life. An additional, but usually ignored, activity of Hint-1 is its ability to catalyze the conversion of adenosine 5'-O-monophosphorothioate (AMPS) to 5'-O-monophosphate (AMP). By mutagenetic and biochemical studies, we defined the active site of Hint-1 and the kinetic parameters of the desulfuration reaction (P-S bond cleavage). Additionally, crystallographic analysis (resolution from 1.08 to 1.37 A) of three engineered cysteine mutants showed the high similarity of their structures, which were not very different from the structure of WT Hint-1. Moreover, we found that not only AMPS but also other ribonucleoside and 2'-deoxyribonucleoside phosphorothioates are desulfurated by Hint-1 at the following relative rates: GMPS > AMPS > dGMPS >/= CMPS > UMPS > dAMPS >> dCMPS > TMPS, and during the reaction, hydrogen sulfide, which is thought to be the third gaseous mediator, was released. Histidine triad nucleotide-binding protein 1 (HINT-1) phosphoramidase transforms nucleoside 5'-O-phosphorothioates to nucleoside 5'-O-phosphates.,Ozga M, Dolot R, Janicka M, Kaczmarek R, Krakowiak A J Biol Chem. 2010 Dec 24;285(52):40809-18. Epub 2010 Oct 12. PMID:20940308 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Histidine triad nucleotide-binding protein 3D structures

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