saxitoxin   Click here for help

GtoPdb Ligand ID: 2625

PDB Ligand
Compound class: Natural product or derivative
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Ligand Activity Visualisation Charts

These are box plot that provide a unique visualisation, summarising all the activity data for a ligand taken from ChEMBL and GtoPdb across multiple targets and species. Click on a plot to see the median, interquartile range, low and high data points. A value of zero indicates that no data are available. A separate chart is created for each target, and where possible the algorithm tries to merge ChEMBL and GtoPdb targets by matching them on name and UniProt accession, for each available species. However, please note that inconsistency in naming of targets may lead to data for the same target being reported across multiple charts.

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View interactive charts of activity data across species
2D Structure
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2D Structure

An image of the ligand's 2D structure. For small molecules with SMILES these are drawn using the NCI/CADD Chemical Identifier Resolver. Click on the image to access the chemical structure search tool with the ligand pre-loaded in the structure editor. For other types of ligands, e.g. longer nucleotides and peptides, a manually drawn representation of the molecule may be provided.

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Click here for structure editor
Physico-chemical Properties
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Physico-chemical Properties

Calculated molecular properties are available for small molecules and natural products (not peptides). Properties were generated using the CDK toolkit. All properties were selected to enable the prediction of the Lipinski Rule-of-Five profile or ‘druglikeness’ for each ligand. For more info on each category see the help pages.

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Hydrogen bond acceptors 11
Hydrogen bond donors 6
Rotatable bonds 3
Topological polar surface area 184.81
Molecular weight 299.13
XLogP -2.59
No. Lipinski's rules broken 2
SMILES / InChI / InChIKey
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SMILES / InChI / InChIKey

SMILES (Simplified Molecular Input Line Entry Specification) A specification for unambiguously describing the structure of chemical molecules using short ASCII strings. Canonical SMILES specify a unique representation of the 2D structure without chiral or isotopic specifications. Isomeric SMILES include chiral specification and isotopes.

Standard InChI (IUPAC International Chemical Identifier) and InChIKey InChI is a non-proprietary, standard, textual identifier for chemical substances designed to facilitate linking of information and database searching. An InChIKey is a simplified version of a full InChI, designed for easier web searching.

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Canonical SMILES NC(=O)OCC1N=C(N)N2C3(C1NC(=N3)N)C(O)(O)CC2
Isomeric SMILES NC(=O)OC[C@@H]1N=C(N)N2[C@@]3([C@H]1NC(=N3)N)C(O)(O)CC2
InChI InChI=1S/C10H17N7O4/c11-6-15-5-4(3-21-8(13)18)14-7(12)17-2-1-9(19,20)10(5,17)16-6/h4-5,19-20H,1-3H2,(H2,12,14)(H2,13,18)(H3,11,15,16)/t4-,5-,10-/m0/s1
InChI Key RPQXVSUAYFXFJA-HGRQIUPRSA-N
References
1. Bricelj VM, Connell L, Konoki K, Macquarrie SP, Scheuer T, Catterall WA, Trainer VL. (2005)
Sodium channel mutation leading to saxitoxin resistance in clams increases risk of PSP.
Nature, 434 (7034): 763-7. [PMID:15815630]
2. Cribbs LL, Satin J, Fozzard HA, Rogart RB. (1990)
Functional expression of the rat heart I Na+ channel isoform. Demonstration of properties characteristic of native cardiac Na+ channels.
FEBS Lett, 275 (1-2): 195-200. [PMID:2175715]
3. Penzotti JL, Lipkind G, Fozzard HA, Dudley Jr SC. (2001)
Specific neosaxitoxin interactions with the Na+ channel outer vestibule determined by mutant cycle analysis.
Biophys J, 80 (2): 698-706. [PMID:11159437]
4. Walker JR, Novick PA, Parsons WH, McGregor M, Zablocki J, Pande VS, Du Bois J. (2012)
Marked difference in saxitoxin and tetrodotoxin affinity for the human nociceptive voltage-gated sodium channel (Nav1.7) [corrected].
Proc Natl Acad Sci USA, 109 (44): 18102-7. [PMID:23077250]
5. Zeng D, Kyle JW, Martin RL, Ambler KS, Hanck DA. (1996)
Cardiac sodium channels expressed in a peripheral neurotumor-derived cell line, RT4-B8.
Am J Physiol, 270 (5 Pt 1): C1522-31. [PMID:8967455]