P86097 · 3S13_MICSU
- ProteinThree-finger toxin MS3
- StatusUniProtKB reviewed (Swiss-Prot)
- Amino acids
- Protein existenceEvidence at protein level
- Annotation score3/5
Function
function
Produces peripheral paralysis by blocking neuromuscular transmission at the postsynaptic site. Binds to and inhibits the endogenous nicotinic acetylcholine receptors (nAChR) in human rhabdomyosarcoma TE 671 cell line with an IC50 of 346 mM. This neurotoxin is lethal to mice by intraperitoneal injection and to zebrafish by injection at the back of the dorsolateral region.
GO annotations
all annotations | all molecular function | virus receptor activity | dna binding | rna binding | cytoskeletal motor activity | catalytic activity | gtpase activity | structural molecule activity | transporter activity | cytoskeletal protein binding | lipid binding | cyclase activity | antioxidant activity | oxidoreductase activity | transferase activity | hydrolase activity | lyase activity | isomerase activity | ligase activity | protein tag activity | cargo receptor activity | histone binding | protein folding chaperone | translation regulator activity | nutrient reservoir activity | receptor ligand activity | molecular transducer activity | molecular adaptor activity | toxin activity | cell adhesion mediator activity | molecular function regulator activity | virus coreceptor activity | catalytic activity, acting on a protein | catalytic activity, acting on dna | catalytic activity, acting on rna | molecular carrier activity | transcription regulator activity | general transcription initiation factor activity | molecular sensor activity | molecular sequestering activity | atp-dependent activity | other molecular function | all biological process | mitotic cell cycle | cytokinesis | cytoplasmic translation | immune system process | muscle system process | circulatory system process | renal system process | respiratory system process | carbohydrate metabolic process | generation of precursor metabolites and energy | dna replication | dna repair | dna recombination | chromatin organization | dna-templated transcription | regulation of dna-templated transcription | trna metabolic process | protein folding | protein glycosylation | amino acid metabolic process | modified amino acid metabolic process | lipid metabolic process | vitamin metabolic process | sulfur compound metabolic process | intracellular protein transport | nucleocytoplasmic transport | autophagy | inflammatory response | mitochondrion organization | cytoskeleton organization | microtubule-based movement | peroxisome organization | lysosome organization | chromosome segregation | cell adhesion | establishment or maintenance of cell polarity | programmed cell death | photosynthesis | mrna metabolic process | snrna metabolic process | vesicle-mediated transport | reproductive process | digestive system process | signaling | cell differentiation | protein catabolic process | extracellular matrix organization | regulatory ncrna-mediated gene silencing | telomere organization | cell junction organization | wound healing | ribosome biogenesis | cilium organization | anatomical structure development | cell motility | nervous system process | endocrine process | protein maturation | transmembrane transport | nucleobase-containing small molecule metabolic process | hepaticobiliary system process | membrane organization | protein-containing complex assembly | cell wall organization or biogenesis | nitrogen cycle metabolic process | protein localization to plasma membrane | defense response to other organism | detoxification | meiotic nuclear division | mitotic nuclear division | mitochondrial gene expression | carbohydrate derivative metabolic process | other biological process | all cellular component | nuclear chromosome | extracellular region | extracellular space | cell wall | nucleus | nuclear envelope | nucleoplasm | chromosome | nucleolus | mitochondrion | lysosome | endosome | vacuole | peroxisome | endoplasmic reticulum | golgi apparatus | lipid droplet | microtubule organizing center | cytosol | ribosome | cytoskeleton | plasma membrane | cilium | plastid | thylakoid | external encapsulating structure | extracellular matrix | cytoplasmic vesicle | organelle | other cellular component | |||
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Aspect | Term | |
---|---|---|
Cellular Component | extracellular region | |
Molecular Function | acetylcholine receptor inhibitor activity | |
Molecular Function | ion channel regulator activity | |
Molecular Function | toxin activity | |
Biological Process | modulation of receptor activity in another organism |
Keywords
- Molecular function
Names & Taxonomy
Protein names
- Recommended nameThree-finger toxin MS3
- Alternative names
Organism names
- Taxonomic lineageEukaryota > Metazoa > Chordata > Craniata > Vertebrata > Euteleostomi > Lepidosauria > Squamata > Bifurcata > Unidentata > Episquamata > Toxicofera > Serpentes > Colubroidea > Elapidae > Elapinae > Micrurus
Accessions
- Primary accessionP86097
Subcellular Location
PTM/Processing
Features
Showing features for chain, disulfide bond.
Type | ID | Position(s) | Description | |||
---|---|---|---|---|---|---|
Chain | PRO_0000371723 | 1-60 | Three-finger toxin MS3 | |||
Sequence: LICYSQMYNEIIKTCENGETTCYSKTWRDHRGTRLEKGCGCPPVKYDMIVKCCKTDRCGN | ||||||
Disulfide bond | 3↔22 | |||||
Sequence: CYSQMYNEIIKTCENGETTC | ||||||
Disulfide bond | 15↔39 | |||||
Sequence: CENGETTCYSKTWRDHRGTRLEKGC | ||||||
Disulfide bond | 41↔52 | |||||
Sequence: CPPVKYDMIVKC | ||||||
Disulfide bond | 53↔58 | |||||
Sequence: CKTDRC |
Keywords
- PTM
Expression
Tissue specificity
Expressed by the venom gland.
Structure
Family & Domains
Sequence similarities
Belongs to the snake three-finger toxin family. Short-chain subfamily. Type I alpha-neurotoxin sub-subfamily.