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Title :   CRYSTAL STRUCTURE OF THE CHIMERIC MUSCARINIC TOXIN MT7 WITH LOOP 3 FROM MT1

Authors :   E. A. Stura, D. Servent, R. Menez, G. Mournier, A. Menez, C. Fruchart-Ga

Date :   09 Jun 10 (Deposition) - 24 Aug 11 (Release) - 31 May 17 (Revision)

Method :   X-RAY DIFFRACTION

Resolution :   1.25

Chains :   Asym. Unit : A,B
Biol. Unit 1: A  (1x)
Biol. Unit 2: B  (1x)
Biol. Unit 3: A (1x),B (1x)

Keywords :   Chimeric Muscarinic Toxin, Hm1-Muscarinic Receptor, Snake Toxin, Green Mamba, Toxin (Keyword Search: [Gene Ontology, PubMed, Web (Google)] )

Reference :   C. Fruchart-Gaillard, G. Mourier, G. Blanchet, L. Vera, N. Gilles, R. Menez, E. Marcon, E. A. Stura, D. Servent
Engineering Of Three-Finger Fold Toxins Creates Ligands Wit Original Pharmacological Profiles For Muscarinic And Adrenergic Receptors.
Plos One V. 7 39166 2012
PubMed-ID: 22720062 | Reference-DOI: 10.1371/JOURNAL.PONE.0039166

Molecule 1 - THREE-FINGER MUSCARINIC TOXIN 7
	Chains	:	A, B
	Engineered	:	YES
	Organism Common	:	EASTERN GREEN MAMBA
	Organism Scientific	:	DENDROASPIS ANGUSTICEPS
	Organism Taxid	:	8618
	Other Details	:	SEQUENCE FROM TWO MUSCARINIC TOXINS WITH DIFFERENT SELECTIVITY FOR HM1
	Synonym	:	MT7,MUSCARINIC M1-TOXIN 1,MTX1,MT7,MUSCARINIC M1-TOXIN 1
	Synthetic	:	YES

		1	2
Asymmetric Unit	:	A	B
Biological Unit 1 (1x)	:	A
Biological Unit 2 (1x)	:		B
Biological Unit 3 (1x)	:	A (1x)	B (1x)

Summary Information (see also Sequences/Alignments below)

Asymmetric Unit (1, 4)

No.	Name	Count	Type	Full Name
1	SO4	4	Ligand/Ion	SULFATE ION

Biological Unit 1 (1, 2)

No.	Name	Count	Type	Full Name
1	SO4	2	Ligand/Ion	SULFATE ION

Biological Unit 2 (1, 2)

No.	Name	Count	Type	Full Name
1	SO4	2	Ligand/Ion	SULFATE ION

Biological Unit 3 (1, 2)

No.	Name	Count	Type	Full Name
1	SO4	2	Ligand/Ion	SULFATE ION

Asymmetric Unit (4, 4)

No.	Name	Evidence	Residues	Description
1	AC1	SOFTWARE	VAL A:52 , ARG A:53 , HOH A:89 , HOH A:110 , HOH A:183 , HOH A:239 , HOH A:252 , HOH A:258 , ARG B:53 , HOH B:179 , HOH B:198 , HOH B:218	BINDING SITE FOR RESIDUE SO4 A 102
2	AC2	SOFTWARE	SER A:14 , THR A:50 , LYS A:63 , HOH A:68 , HOH A:122 , HOH A:160 , HOH A:167 , HOH A:215 , HOH A:223 , LYS B:48	BINDING SITE FOR RESIDUE SO4 A 104
3	AC3	SOFTWARE	ASN B:7 , SER B:8 , TYR B:36 , PHE B:38 , THR B:39 , HOH B:73 , HOH B:79 , HOH B:89 , HOH B:115 , HOH B:163 , HOH B:231	BINDING SITE FOR RESIDUE SO4 B 101
4	AC4	SOFTWARE	TRP A:10 , HOH A:139 , HOH A:163 , LYS B:26 , ARG B:57 , HOH B:275 , HOH B:289 , HOH B:300	BINDING SITE FOR RESIDUE SO4 B 103

Asymmetric Unit

No.	Residues
1	A:3	-	A:24
2	A:17	-	A:42
3	A:46	-	A:58
4	A:59	-	A:64
5	B:3	-	B:24
6	B:17	-	B:42
7	B:46	-	B:58
8	B:59	-	B:64

(no "Cis Peptide Bond" information available for 3NEQ)

(no "SAP(SNP)/Variant" information available for 3NEQ)

Asymmetric Unit (1, 2)

	PROSITE			UniProtKB		PDB
No.	ID	AC	Description	ID	Location	Count	Location
1	SNAKE_TOXIN	PS00272	Snake toxins signature.	3SIM1_DENAN	41-62	2	A:41-62 B:41-62
1	SNAKE_TOXIN	PS00272	Snake toxins signature.	3SIM7_DENAN	62-82	2	A:41-62 B:41-62

Biological Unit 1 (1, 2)

	PROSITE			UniProtKB		PDB
No.	ID	AC	Description	ID	Location	Count	Location
1	SNAKE_TOXIN	PS00272	Snake toxins signature.	3SIM1_DENAN	41-62	1	A:41-62 -
1	SNAKE_TOXIN	PS00272	Snake toxins signature.	3SIM7_DENAN	62-82	1	A:41-62 -

Biological Unit 2 (1, 2)

	PROSITE			UniProtKB		PDB
No.	ID	AC	Description	ID	Location	Count	Location
1	SNAKE_TOXIN	PS00272	Snake toxins signature.	3SIM1_DENAN	41-62	1	- B:41-62
1	SNAKE_TOXIN	PS00272	Snake toxins signature.	3SIM7_DENAN	62-82	1	- B:41-62

Biological Unit 3 (1, 4)

	PROSITE			UniProtKB		PDB
No.	ID	AC	Description	ID	Location	Count	Location
1	SNAKE_TOXIN	PS00272	Snake toxins signature.	3SIM1_DENAN	41-62	2	A:41-62 B:41-62
1	SNAKE_TOXIN	PS00272	Snake toxins signature.	3SIM7_DENAN	62-82	2	A:41-62 B:41-62

(no "Exon" information available for 3NEQ)

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:66
 aligned with 3SIM1_DENAN | P81030 from UniProtKB/Swiss-Prot  Length:66

    Alignment length:66
                                    10        20        30        40        50        60      
           3SIM1_DENAN    1 LTCVTSKSIFGITTENCPDGQNLCFKKWYYIVPRYSDITWGCAATCPKPTNVRETIRCCETDKCNE 66
               SCOP domains ------------------------------------------------------------------ SCOP domains
               CATH domains ------------------------------------------------------------------ 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
                  3neq A  1 LTCVKSNSIWFPTSEDCPDGQNLCFKRWQYISPRMYDFTRGCAATCPKPTNVRETIRCCGTDKCNK 66
                                    10        20        30        40        50        60

Chain A from PDB  Type:PROTEIN  Length:66
 aligned with 3SIM7_DENAN | Q8QGR0 from UniProtKB/Swiss-Prot  Length:86

    Alignment length:66
                                                                            70                
                                                                          69 |                
                                    31        41        51        61       |70        80      
           3SIM7_DENAN   22 LTCVKSNSIWFPTSEDCPDGQNLCFKRWQYISPRMYDFTRGCAATCPK-AEYRDVINCCGTDKCNK 86
               SCOP domains ------------------------------------------------------------------ SCOP domains
               CATH domains ------------------------------------------------------------------ CATH domains
               Pfam domains ------------------------------------------------------------------ Pfam domains
         Sec.struct. author .eeee.......eeee......eeeeeeeeee..eeeeeeeee..........eeeeee....... Sec.struct. author
                 SAPs(SNPs) ------------------------------------------------------------------ SAPs(SNPs)
                PROSITE (2) ----------------------------------------SNAKE_TOXIN           ---- PROSITE (2)
                 Transcript ------------------------------------------------------------------ Transcript
                  3neq A  1 LTCVKSNSIWFPTSEDCPDGQNLCFKRWQYISPRMYDFTRGCAATCPKPTNVRETIRCCGTDKCNK 66
                                    10        20        30        40        50        60

Chain B from PDB  Type:PROTEIN  Length:66
 aligned with 3SIM1_DENAN | P81030 from UniProtKB/Swiss-Prot  Length:66

    Alignment length:66
                                    10        20        30        40        50        60      
           3SIM1_DENAN    1 LTCVTSKSIFGITTENCPDGQNLCFKKWYYIVPRYSDITWGCAATCPKPTNVRETIRCCETDKCNE 66
               SCOP domains ------------------------------------------------------------------ SCOP domains
               CATH domains ------------------------------------------------------------------ CATH domains
               Pfam domains ------------------------------------------------------------------ Pfam domains
         Sec.struct. author .eeeeee..eeeeeee......eeeeeeeeee..eeeeeeeee..........eeeeee....... Sec.struct. author
                 SAPs(SNPs) ------------------------------------------------------------------ SAPs(SNPs)
                    PROSITE ----------------------------------------SNAKE_TOXIN           ---- PROSITE
                 Transcript ------------------------------------------------------------------ Transcript
                  3neq B  1 LTCVKSNSIWFPTSEDCPDGQNLCFKRWQYISPRMYDFTRGCAATCPKPTNVRETIRCCGTDKCNK 66
                                    10        20        30        40        50        60

Chain B from PDB  Type:PROTEIN  Length:66
 aligned with 3SIM7_DENAN | Q8QGR0 from UniProtKB/Swiss-Prot  Length:86

    Alignment length:66
                                                                            70                
                                                                          69 |                
                                    31        41        51        61       |70        80      
           3SIM7_DENAN   22 LTCVKSNSIWFPTSEDCPDGQNLCFKRWQYISPRMYDFTRGCAATCPK-AEYRDVINCCGTDKCNK 86
               SCOP domains ------------------------------------------------------------------ SCOP domains
               CATH domains ------------------------------------------------------------------ CATH domains
               Pfam domains ------------------------------------------------------------------ Pfam domains
         Sec.struct. author .eeeeee..eeeeeee......eeeeeeeeee..eeeeeeeee..........eeeeee....... Sec.struct. author
                 SAPs(SNPs) ------------------------------------------------------------------ SAPs(SNPs)
                PROSITE (2) ----------------------------------------SNAKE_TOXIN           ---- PROSITE (2)
                 Transcript ------------------------------------------------------------------ Transcript
                  3neq B  1 LTCVKSNSIWFPTSEDCPDGQNLCFKRWQYISPRMYDFTRGCAATCPKPTNVRETIRCCGTDKCNK 66
                                    10        20        30        40        50        60

Legend:		→ Mismatch	(orange background)
	-	→ Gap	(green background, '-', border residues have a numbering label)
		→ Modified Residue	(blue background, lower-case, 'x' indicates undefined single-letter code, labelled with number + name)
	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 '\|'

(no "SCOP Domain" information available for 3NEQ)

(no "CATH Domain" information available for 3NEQ)

(no "Pfam Domain" information available for 3NEQ)

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.

Chain A,B (3SIM1_DENAN | P81030)

biological process
	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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UniProtKB/Swiss-Prot
	3SIM1_DENAN \| P81030	:	3fev 4do8
	3SIM7_DENAN \| Q8QGR0	:	2vlw 3fev

1ff4	MUSCARINIC TOXIN MT2
2vlw	MT7 TOXIN WITH DIIODO TYR 51
3fev	CHIMERA MT7 TOXIN WITH LOOP 1 FROM MT1

Description

Compounds

Structural Features

Chains, Units

Ligands, Modified Residues, Ions (1, 4)

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SS Bonds (8, 8)

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