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[ CAS No. 65996-58-9 ] {[proInfo.proName]}

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Chemical Structure| 65996-58-9
Chemical Structure| 65996-58-9
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Product Citations

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Katharina Sievers ; DOI:

Abstract: The eukaryotic tRNA guanine transglycosylase (TGT) is an RNA modifying enzyme incorporating queuinea hypermodified guanine derivative, into the tRN AsAsp,Asn.His,Ty,. While both subunits of the functionaheterodimer have been crystalized individually, much of our understanding of its dimer interface orrecognition of a target RNA has been inferred from its more thoroughly studied bacterial homologHowever, since bacterial TGT, by incorporating queuine precursor preQ,, deviates not only in functionbut as a homodimer, also in its subunit architecture, any inferences regarding the subunit association ofthe eukaryotic heterodimer or the significance of its unique catalytically inactive subunit are based onunstable footing. Here, we report the crystal structure of human TGT in its heterodimeric form and incomplex with a 25-mer stem loop RNA, enabling detailed analysis of its dimer interface and interactionwith a minimal substrate RNA. Based on a model of bound tRNA, we addressed a potential functionalrole of the catalytically inactive subunit QTRT2 by UV-crosslinking and mutagenesis experimentsidentifying the two-stranded BEBF-sheet of the OTRT2 subunit as an additional RNA-binding motif.

Keywords: Queuine ; tRNA modifcation ; RN A-binding protein ; transglycosylase ; heterodimer ; eukaryotic ; structural biology ; X-raycrystallography

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Sievers, Katharina ; Welp, Luisa ; Urlaub, Henning , et al. DOI: PubMed ID:

Abstract: The eukaryotic tRNA guanine transglycosylase (TGT) is an RNA modifying enzyme incorporating queuine, a hypermodified guanine derivative, into the tRNAsAsp,Asn,His,Tyr. While both subunits of the functional heterodimer have been crystallized individually, much of our understanding of its dimer interface or recognition of a target RNA has been inferred from its more thoroughly studied bacterial homolog. However, since bacterial TGT, by incorporating queuine precursor preQ1, deviates not only in function, but as a homodimer, also in its subunit architecture, any inferences regarding the subunit association of the eukaryotic heterodimer or the significance of its unique catalytically inactive subunit are based on unstable footing. Here, we report the crystal structure of human TGT in its heterodimeric form and in complex with a 25-mer stem loop RNA, enabling detailed anal. of its dimer interface and interaction with a minimal substrate RNA. Based on a model of bound tRNA, we addressed a potential functional role of the catalytically inactive subunit QTRT2 by UV-crosslinking and mutagenesis experiments, identifying the two-stranded βEβF-sheet of the QTRT2 subunit as an addnl. RNA-binding motif.

Keywords: Queuine ; RNA-binding protein ; X-ray crystallography ; eukaryotic ; heterodimer ; structural biology ; tRNA modification ; transglycosylase

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Product Details of [ 65996-58-9 ]

CAS No. :65996-58-9 MDL No. :
Formula : C6H6N4O Boiling Point : No data available
Linear Structure Formula :- InChI Key :FFYPRJYSJODFFD-UHFFFAOYSA-N
M.W : 150.14 Pubchem ID :135461003
Synonyms :
Chemical Name :2-Amino-3H-pyrrolo[3,2-d]pyrimidin-4(5H)-one

Calculated chemistry of [ 65996-58-9 ]      Expand+

Physicochemical Properties

Num. heavy atoms : 11
Num. arom. heavy atoms : 9
Fraction Csp3 : 0.0
Num. rotatable bonds : 0
Num. H-bond acceptors : 2.0
Num. H-bond donors : 3.0
Molar Refractivity : 41.12
TPSA : 87.56 Ų

Pharmacokinetics

GI absorption : High
BBB permeant : No
P-gp substrate : No
CYP1A2 inhibitor : No
CYP2C19 inhibitor : No
CYP2C9 inhibitor : No
CYP2D6 inhibitor : No
CYP3A4 inhibitor : No
Log Kp (skin permeation) : -7.76 cm/s

Lipophilicity

Log Po/w (iLOGP) : 0.18
Log Po/w (XLOGP3) : -0.76
Log Po/w (WLOGP) : -0.16
Log Po/w (MLOGP) : -0.53
Log Po/w (SILICOS-IT) : 1.0
Consensus Log Po/w : -0.05

Druglikeness

Lipinski : 0.0
Ghose : None
Veber : 0.0
Egan : 0.0
Muegge : 1.0
Bioavailability Score : 0.55

Water Solubility

Log S (ESOL) : -0.9
Solubility : 19.0 mg/ml ; 0.127 mol/l
Class : Very soluble
Log S (Ali) : -0.6
Solubility : 37.6 mg/ml ; 0.25 mol/l
Class : Very soluble
Log S (SILICOS-IT) : -2.07
Solubility : 1.28 mg/ml ; 0.00855 mol/l
Class : Soluble

Medicinal Chemistry

PAINS : 0.0 alert
Brenk : 0.0 alert
Leadlikeness : 1.0
Synthetic accessibility : 1.89

Safety of [ 65996-58-9 ]

Signal Word:Warning Class:
Precautionary Statements:P261-P305+P351+P338 UN#:
Hazard Statements:H302-H315-H319-H335 Packing Group:
GHS Pictogram:
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