Summary
| Full name | 7-methylguanosine |
| Short name | m7G |
| MODOMICS code new | 2000000007G |
| MODOMICS code | 7G |
| Nature of the modified residue | Natural |
| RNAMods code | 7 |
| Residue unique ID | 116 |
| Found in RNA | Yes |
| Related nucleotides | 203 |
| Enzymes |
Abd1 (Saccharomyces cerevisiae) ArmA (Escherichia coli) Bud23 (Saccharomyces cerevisiae) METTL1 (Homo sapiens) RlmKL (Escherichia coli) RmtB (Escherichia coli) RsmG (Escherichia coli) RsmG (Bacillus subtilis) RsmG (Thermus thermophilus) Sgm (Micromonospora zionensis) Trm8 (Saccharomyces cerevisiae) TrmB (Escherichia coli) TrmB (Bacillus subtilis) WBSCR22 (Homo sapiens) |
| Found in phylogeny | Eubacteria, Eukaryota |
| Found naturally in RNA types | rRNA, tRNA |
Chemical information
| Sum formula | C11H15N5O5+ |
| Type of moiety | nucleoside |
| Degeneracy | not applicable |
| SMILES | [C@@H]1([n]2c[n+](C)c3c2nc(nc3=O)N)O[C@H](CO)[C@@H](O)[C@H]1O |
| logP | -4.3348 |
| TPSA | 143.98 |
| Number of atoms | 21 |
| Number of Hydrogen Bond Acceptors 1 (HBA1) | 9 |
| Number of Hydrogen Bond Acceptors 2 (HBA2) | 9 |
| Number of Hydrogen Bond Donors (HBD) | 4 |
| PDB no exac match , link to the most similar ligand | MG7 |
| HMDB (Human Metabolome Database) no exact match, link to the most similar ligand | None |
| InChI | InChI=1S/C11H15N5O5/c1-15-3-16(8-5(15)9(20)14-11(12)13-8)10-7(19)6(18)4(2-17)21-10/h3-4,6-7,10,17-19H,2H2,1H3,(H2,12,14,20)/q+1/t4-,6-,7-,10-/m1/s1 |
| InChIKey | URCXGZVBPWZNMN-KQYNXXCUSA-N |
| Search the molecule in external databases | ChEMBL ChemAgora ChEBI PubChem Compound Database Ligand Expo ChemSpider WIPO |
* Chemical properties calculated with Open Babel - O'Boyle et al. Open Babel: An open chemical toolbox. J Cheminform 3, 33 (2011) (link)
Download Structures
| 2D | .png .mol .mol2 .sdf .pdb .smi |
| 3D | .mol .mol2 .sdf .pdb |
Tautomers
| Tautomers SMILES |
C[n+]1c2c(nc(nc2O)N)n(C3C(O)C(O)C(CO)O3)c1 m7G tautomer #0
C[n+]1c2c([nH]c(nc2=O)N)n(C3C(O)C(O)C(CO)O3)c1 m7G tautomer #1 C[n+]1c2c([nH]c([nH]c2=O)=N)n(C3C(O)C(O)C(CO)O3)c1 m7G tautomer #2 C[n+]1c2c(nc([nH]c2=O)N)n(C3C(O)C(O)C(CO)O3)c1 m7G tautomer #3 C[n+]1c2c(nc([nH]c2O)=N)n(C3C(O)C(O)C(CO)O3)c1 m7G tautomer #4 C[N+]=1C2C(=NC(=NC2=O)N)N(C3C(O)C(O)C(CO)O3)C1 m7G tautomer #5 C[n+]1c2c(nc(nc2O)N)n(C3C(O)C(O)C(CO)O3)c1 m7G tautomer #6 C[N+]=1C2C(=NC(NC2=O)=N)N(C3C(O)C(O)C(CO)O3)C1 m7G tautomer #7 C[n+]1c2c([nH]c(nc2O)=N)n(C3C(O)C(O)C(CO)O3)c1 m7G tautomer #8 C[N+]=1C2C(=NC(N=C2O)=N)N(C3C(O)C(O)C(CO)O3)C1 m7G tautomer #9 |
| Tautomer image | Show Image |
Predicted CYP Metabolic Sites
| CYP3A4 | CYP2D6 | CYP2C9 |
|---|---|---|
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|
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* CYP Metabolic sites predicted with SMARTCyp. SMARTCyp is a method for prediction of which sites in a molecule that are most liable to metabolism by Cytochrome P450. It has been shown to be applicable to metabolism by the isoforms 1A2, 2A6, 2B6, 2C8, 2C19, 2E1, and 3A4 (CYP3A4), and specific models for the isoform 2C9 (CYP2C9) and isoform 2D6 (CYP2D6). CYP3A4, CYP2D6, and CYP2C9 are the three of the most important enzymes in drug metabolism since they are involved in the metabolism of more than half of the drugs used today. The three top-ranked atoms are highlighted. See: SmartCYP and SmartCYP - background; Patrik Rydberg, David E. Gloriam, Lars Olsen, The SMARTCyp cytochrome P450 metabolism prediction server, Bioinformatics, Volume 26, Issue 23, 1 December 2010, Pages 2988–2989 (link)
LC-MS Information
| Monoisotopic mass | 299.123 |
| Average mass | 297.267 |
| [M+H]+ | 298.1151 |
| Product ions | 166 |
| Normalized LC elution time * | 0,83 (Kellner 2014); 0,89 (Kellner 2014) |
| LC elution order/characteristics | between U and G (Kellner 2014, Kellner 2014) |
* normalized to guanosine (G), measured with a RP C-18 column with acetonitrile/ammonium acetate as mobile phase.
LC-MS Publications
| Title | Authors | Journal | Details | ||
|---|---|---|---|---|---|
| Profiling of RNA modifications by multiplexed stable isotope labelling. | Kellner S, Neumann J, Rosenkranz D, Lebedeva S, Ketting RF, Zischler H, Schneider D, Helm M. | Chem Commun (Camb). | [details] | 24567952 | - |
| Quantitative analysis of ribonucleoside modifications in tRNA by HPLC-coupled mass spectrometry. | Su D, Chan CT, Gu C, Lim KS, Chionh YH, McBee ME, Russell BS, Babu IR, Begley TJ, Dedon PC... | Nat Protoc | [details] | 24625781 | - |
| Absolute and relative quantification of RNA modifications via biosynthetic isotopomers. | Kellner S, Ochel A, Thuring K, Spenkuch F, Neumann J, Sharma S, Entian KD, Schneider D, Helm M... | Nucleic Acids Res | [details] | 25129236 | - |
Comments
m7G has a positive charge at neutral pH.
Chemical groups contained
| Type | Subtype |
|---|---|
| methyl group | methyl at aromatic N |
Reactions producing 7-methylguanosine
| Name |
|---|
| G:m7G |
Reactions starting from 7-methylguanosine
| Name |
|---|
| m7G:m2,7G |
Last modification of this entry: Sept. 22, 2023