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(-) Description

Title :  CRYSTAL STRUCTURE OF THE MUSCARINIC TOXIN MT7 DIIODOTYR51 DERIVATIVE.
 
Authors :  R. Menez, V. Granata, G. Mourier, C. Fruchart-Gaillard, A. Menez, D. Servant, E. A. Stura
Date :  17 Jan 08  (Deposition) - 14 Oct 08  (Release) - 24 Feb 09  (Revision)
Method :  X-RAY DIFFRACTION
Resolution :  1.39
Chains :  Asym. Unit :  A,B
Biol. Unit 1:  A  (1x)
Biol. Unit 2:  B  (1x)
Keywords :  Acetylcholine Receptor Inhibitor, Green Mamba Snake Toxin, Hm1 Muscarinic Receptor, Toxin, Secreted, Neurotoxin, Diiodotyrosine, Muscarinic Toxin, Postsynaptic Neurotoxin (Keyword Search: [Gene Ontology, PubMed, Web (Google)] )
 
Reference :  C. Fruchart-Gaillard, G. Mourier, C. Marquer, E. Stura, N. J. M. Birdsall, D. Servent
Different Interactions Between Mt7 Toxin And The Human Muscarinic M1 Receptor In Its Free And N- Methylscopolamine-Occupied States.
Mol. Pharmacol. V. 74 1554 2008
PubMed-ID: 18784346  |  Reference-DOI: 10.1124/MOL.108.050773
(for further references see the PDB file header)

(-) Compounds

Molecule 1 - MUSCARINIC M1-TOXIN1
    Chains: A, B
    Organ: VENOMOUS GLANDS
    Organism Common: EASTERN GREEN MAMBA
    Organism Scientific: DENDROASPIS ANGUSTICEPS
    Organism Taxid: 8618
    Other Details: DI-IODO TYROSINE AT POSITION 51
    Other Details - Source: CHEMICAL PEPTIDE SYNTHESIS ACCORDING TO SEQUENCE.
    Strain: EASTERN
    Synonym: M1-TOXIN, MUSCARINIC TOXIN 7, MT7, MT-7, MUSCARINIC SNAKE TOXIN
    Synthetic: YES
    Tissue: VENOM

 Structural Features

(-) Chains, Units

  12
Asymmetric Unit : AB
Biological Unit 1 (1x): A 
Biological Unit 2 (1x):  B

Summary Information (see also Sequences/Alignments below)

(-) Ligands, Modified Residues, Ions  (3, 5)

Asymmetric Unit (3, 5)
No.NameCountTypeFull Name
1ACT1Ligand/IonACETATE ION
2SO42Ligand/IonSULFATE ION
3TYI2Mod. Amino Acid3,5-DIIODOTYROSINE
Biological Unit 1 (3, 3)
No.NameCountTypeFull Name
1ACT1Ligand/IonACETATE ION
2SO41Ligand/IonSULFATE ION
3TYI1Mod. Amino Acid3,5-DIIODOTYROSINE
Biological Unit 2 (2, 2)
No.NameCountTypeFull Name
1ACT-1Ligand/IonACETATE ION
2SO41Ligand/IonSULFATE ION
3TYI1Mod. Amino Acid3,5-DIIODOTYROSINE

(-) Sites  (3, 3)

Asymmetric Unit (3, 3)
No.NameEvidenceResiduesDescription
1AC1SOFTWARETYI A:51 , VAL A:54 , TYR B:30 , TYI B:51BINDING SITE FOR RESIDUE ACT A1067
2AC2SOFTWAREARG A:52 , HOH A:2082 , HOH A:2083 , ARG B:52BINDING SITE FOR RESIDUE SO4 A1068
3AC3SOFTWAREASN B:7 , SER B:8 , HOH B:2087 , HOH B:2089 , HOH B:2090BINDING SITE FOR RESIDUE SO4 B1067

(-) SS Bonds  (8, 8)

Asymmetric Unit
No.Residues
1A:3 -A:24
2A:17 -A:42
3A:46 -A:57
4A:58 -A:63
5B:3 -B:24
6B:17 -B:42
7B:46 -B:57
8B:58 -B:63

(-) Cis Peptide Bonds  (0, 0)

(no "Cis Peptide Bond" information available for 2VLW)

 Sequence-Structure Mapping

(-) SAPs(SNPs)/Variants  (0, 0)

(no "SAP(SNP)/Variant" information available for 2VLW)

(-) PROSITE Motifs  (1, 2)

Asymmetric Unit (1, 2)
 PROSITEUniProtKBPDB
No.IDACDescriptionIDLocationCountLocation
1SNAKE_TOXINPS00272 Snake toxins signature.3SIM7_DENAN62-82
 		  2A:41-61
B:41-61
Biological Unit 1 (1, 1)
 PROSITEUniProtKBPDB
No.IDACDescriptionIDLocationCountLocation
1SNAKE_TOXINPS00272 Snake toxins signature.3SIM7_DENAN62-82
 		  1A:41-61
-
Biological Unit 2 (1, 1)
 PROSITEUniProtKBPDB
No.IDACDescriptionIDLocationCountLocation
1SNAKE_TOXINPS00272 Snake toxins signature.3SIM7_DENAN62-82
 		  1-
B:41-61

(-) Exons   (0, 0)

(no "Exon" information available for 2VLW)

(-) Sequences/Alignments

Asymmetric Unit
   Reformat: Number of residues per line =  ('0' or empty: single-line sequence representation)
  Number of residues per labelling interval =   
  UniProt sequence: complete  aligned part    
   Show mapping: SCOP domains CATH domains Pfam domains Secondary structure (by author)
SAPs(SNPs) PROSITE motifs Exons
(details for a mapped element are shown in a popup box when the mouse pointer rests over it) 
Chain A from PDB  Type:PROTEIN  Length:65
 aligned with 3SIM7_DENAN | Q8QGR0 from UniProtKB/Swiss-Prot  Length:86

    Alignment length:65
                                    31        41        51        61        71        81     
           3SIM7_DENAN   22 LTCVKSNSIWFPTSEDCPDGQNLCFKRWQYISPRMYDFTRGCAATCPKAEYRDVINCCGTDKCNK 86
               SCOP domains ----------------------------------------------------------------- SCOP domains
               CATH domains 2vlwA00 A:1-65 CD59                                               CATH domains
               Pfam domains ----------------------------------------------------------------- Pfam domains
         Sec.struct. author .eeee.......eeee......eeeeeeeeee..eeeeeeeee.........eeeeee....... Sec.struct. author
                 SAPs(SNPs) ----------------------------------------------------------------- SAPs(SNPs)
                    PROSITE ----------------------------------------SNAKE_TOXIN          ---- PROSITE
                 Transcript ----------------------------------------------------------------- Transcript
                  2vlw A  1 LTCVKSNSIWFPTSEDCPDGQNLCFKRWQYISPRMYDFTRGCAATCPKAEyRDVINCCGTDKCNK 65
                                    10        20        30        40        50|       60     
                                                                             51-TYI          


Chain B from PDB  Type:PROTEIN  Length:65
 aligned with 3SIM7_DENAN | Q8QGR0 from UniProtKB/Swiss-Prot  Length:86

    Alignment length:65
                                    31        41        51        61        71        81     
           3SIM7_DENAN   22 LTCVKSNSIWFPTSEDCPDGQNLCFKRWQYISPRMYDFTRGCAATCPKAEYRDVINCCGTDKCNK 86
               SCOP domains ----------------------------------------------------------------- SCOP domains
               CATH domains 2vlwB00 B:1-65 CD59                                               CATH domains
               Pfam domains ----------------------------------------------------------------- Pfam domains
         Sec.struct. author .eeee.......eeee......eeeeeeeeee..eeeeeeeee.........eeeeee....... Sec.struct. author
                 SAPs(SNPs) ----------------------------------------------------------------- SAPs(SNPs)
                    PROSITE ----------------------------------------SNAKE_TOXIN          ---- PROSITE
                 Transcript ----------------------------------------------------------------- Transcript
                  2vlw B  1 LTCVKSNSIWFPTSEDCPDGQNLCFKRWQYISPRMYDFTRGCAATCPKAEyRDVINCCGTDKCNK 65
                                    10        20        30        40        50|       60     
                                                                             51-TYI
   Legend:   → Mismatch (orange background)
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  x → Chemical Group (purple background, 'x', labelled with number + name, e.g. ACE or NH2)
  extra numbering lines below/above indicate numbering irregularities and modified residue names etc., number ends below/above '|'

 Classification and Annotation

(-) SCOP Domains  (0, 0)

(no "SCOP Domain" information available for 2VLW)

(-) CATH Domains  (1, 2)

Asymmetric Unit
(-)
Class: Mainly Beta (13760)

(-) Pfam Domains  (0, 0)

(no "Pfam Domain" information available for 2VLW)

(-) Gene Ontology  (5, 5)

Asymmetric Unit(hide GO term definitions)
Chain A,B   (3SIM7_DENAN | Q8QGR0)
molecular function
    GO:0048019    receptor antagonist activity    Interacts with receptors to reduce the action of another ligand, the agonist.
biological process
    GO:1900116    extracellular negative regulation of signal transduction    Any negative regulation of signal transduction that takes place in extracellular region.
    GO:0009405    pathogenesis    The set of specific processes that generate the ability of an organism to induce an abnormal, generally detrimental state in another organism.
cellular component
    GO:0005576    extracellular region    The space external to the outermost structure of a cell. For cells without external protective or external encapsulating structures this refers to space outside of the plasma membrane. This term covers the host cell environment outside an intracellular parasite.
    GO:0035792    other organism postsynaptic membrane    A postsynaptic membrane that is part of another organism, i.e. a secondary organism with which the first organism is interacting. A postsynaptic membrane is a specialized area of membrane facing the presynaptic membrane on the tip of the nerve ending and separated from it by a minute cleft (the synaptic cleft). Neurotransmitters transmit the signal across the synaptic cleft to the postsynaptic membrane.

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        3SIM7_DENAN | Q8QGR0: 3fev 3neq

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