4AEA - JenaLib

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Title :   DIMERIC ALPHA-COBRATOXIN X-RAY STRUCTURE: LOCALIZATION OF INTERMOLECULAR DISULFIDES AND POSSIBLE MODE OF BINDING TO NICOTINIC ACETYLCHOLINE RECEPTORS

Authors :   P. Rucktooa, A. V. Osipov, I. E. Kasheverov, S. Y. Filkin, V. G. Starkov, T. V. Andreeva, D. Bertrand, Y. N. Utkin, V. I. Tsetlin, T. K. Sixma

Date :   09 Jan 12 (Deposition) - 25 Jan 12 (Release) - 15 Aug 12 (Revision)

Method :   X-RAY DIFFRACTION

Resolution :   1.94

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

Keywords :   Toxin, Three-Finger Toxin, Nicotinic Acetylcholine Receptor (Keyword Search: [Gene Ontology, PubMed, Web (Google)] )

Reference :   A. V. Osipov, P. Rucktooa, I. E. Kasheverov, S. Y. Filkin, V. G. Starkov T. V. Andreeva, T. K. Sixma, D. Bertrand, Y. N. Utkin, V. I. Tsetlin
Dimeric Alpha-Cobratoxin X-Ray Structure: Localization Of Intermolecular Disulfides And Possible Mode Of Binding To Nicotinic Acetylcholine Receptors.
J. Biol. Chem. V. 287 6725 2012
PubMed-ID: 22223648 | Reference-DOI: 10.1074/JBC.M111.322313

Molecule 1 - LONG NEUROTOXIN 1
	Chains	:	A, B
	Organism Common	:	MONOCLED COBRA
	Organism Scientific	:	NAJA KAOUTHIA
	Organism Taxid	:	8649
	Other Details	:	ISOLATED FROM N. KAOUTHIA VENOM
	Synonym	:	ALPHA-COBRATOXIN, ALPHA-CBT, CBTX, NEUROTOXIN 3, DIMERIC ALPHA-COBRATOXIN

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

Summary Information (see also Sequences/Alignments below)

Asymmetric Unit (2, 2)

No.	Name	Count	Type	Full Name
1	GLY	1	Mod. Amino Acid	GLYCINE
2	MPD	1	Ligand/Ion	(4S)-2-METHYL-2,4-PENTANEDIOL

Biological Unit 1 (2, 4)

No.	Name	Count	Type	Full Name
1	GLY	2	Mod. Amino Acid	GLYCINE
2	MPD	2	Ligand/Ion	(4S)-2-METHYL-2,4-PENTANEDIOL

Biological Unit 2 (0, 0)

No.	Name	Count	Type	Full Name
1	GLY	-1	Mod. Amino Acid	GLYCINE
2	MPD	-1	Ligand/Ion	(4S)-2-METHYL-2,4-PENTANEDIOL

Asymmetric Unit (2, 2)

No.	Name	Evidence	Residues	Description
1	AC1	SOFTWARE	PHE A:4 , PRO A:64 , PHE A:65 , THR B:50	BINDING SITE FOR RESIDUE MPD A 100
2	AC2	SOFTWARE	ILE A:5	BINDING SITE FOR RESIDUE GLY A1068

Asymmetric Unit

No.	Residues
1	A:3	-	A:20
2	A:14	-	A:41
3	A:26	-	A:30
4	A:45	-	A:56
5	A:57	-	A:62
6	B:3	-	B:20
7	B:14	-	B:41
8	B:26	-	B:30
9	B:45	-	B:56
10	B:57	-	B:62

(no "Cis Peptide Bond" information available for 4AEA)

(no "SAP(SNP)/Variant" information available for 4AEA)

Asymmetric Unit (1, 2)

	PROSITE			UniProtKB		PDB
No.	ID	AC	Description	ID	Location	Count	Location
1	SNAKE_TOXIN	PS00272	Snake toxins signature.	3L21_NAJKA	40-60	2	A:40-60 B:40-60

Biological Unit 1 (1, 2)

	PROSITE			UniProtKB		PDB
No.	ID	AC	Description	ID	Location	Count	Location
1	SNAKE_TOXIN	PS00272	Snake toxins signature.	3L21_NAJKA	40-60	2	A:40-60 -

Biological Unit 2 (1, 2)

	PROSITE			UniProtKB		PDB
No.	ID	AC	Description	ID	Location	Count	Location
1	SNAKE_TOXIN	PS00272	Snake toxins signature.	3L21_NAJKA	40-60	2	- B:40-60

(no "Exon" information available for 4AEA)

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
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Chain A from PDB  Type:PROTEIN  Length:68
 aligned with 3L21_NAJKA | P01391 from UniProtKB/Swiss-Prot  Length:71

    Alignment length:69
                                    10        20        30        40        50        60         
          3L21_NAJKA      1 IRCFITPDITSKDCPNGHVCYTKTWCDAFCSIRGKRVDLGCAATCPTVKTGVDIQCCSTDNCNPFPTRK   69
               SCOP domains d4aeaa_ A: alpha-Cobratoxin                                           SCOP domains
               CATH domains --------------------------------------------------------------------- CATH domains
               Pfam domains --------------------------------------------------------------------- Pfam domains
         Sec.struct. author ..................eeeeeee...hhhhhh.eeeeeee.........eeeeee..........-. Sec.struct. author
                 SAPs(SNPs) --------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE ---------------------------------------SNAKE_TOXIN          --------- PROSITE
                 Transcript --------------------------------------------------------------------- Transcript
                4aea A    1 IRCFITPDITSKDCPNGHVCYTKTWCDAFCSIRGKRVDLGCAATCPTVKTGVDIQCCSTDNCNPFPT-G 1068
                                    10        20        30        40        50        60      | |
                                                                                             67 |
                                                                                             1068

Chain B from PDB  Type:PROTEIN  Length:67
 aligned with 3L21_NAJKA | P01391 from UniProtKB/Swiss-Prot  Length:71

    Alignment length:67
                                    10        20        30        40        50        60       
          3L21_NAJKA      1 IRCFITPDITSKDCPNGHVCYTKTWCDAFCSIRGKRVDLGCAATCPTVKTGVDIQCCSTDNCNPFPT   67
               SCOP domains d4aeab_ B: alpha-Cobratoxin                                         SCOP domains
               CATH domains ------------------------------------------------------------------- CATH domains
               Pfam domains ------------------------------------------------------------------- Pfam domains
         Sec.struct. author ..................eeeeeee...hhhhhh.eeeeeee.........eeeeee.......... Sec.struct. author
                 SAPs(SNPs) ------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE ---------------------------------------SNAKE_TOXIN          ------- PROSITE
                 Transcript ------------------------------------------------------------------- Transcript
                4aea B    1 IRCFITPDITSKDCPNGHVCYTKTWCDAFCSIRGKRVDLGCAATCPTVKTGVDIQCCSTDNCNPFPT   67
                                    10        20        30        40        50        60

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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 '\|'

Asymmetric Unit

Classes(

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Folds(

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Superfamilies( (-)

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Families(

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Protein Domains( (-)

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Organisms( (-)

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Class: Small proteins (3458)

Fold: Snake toxin-like (152)

Superfamily: Snake toxin-like (152)

Family: Snake venom toxins (107)

Protein domain: alpha-Cobratoxin (6)

Monocled cobra (Naja kaouthia) [TaxId: 8649] (1)

1a	d4aeaa_	A:
1b	d4aeab_	B:

(no "CATH Domain" information available for 4AEA)

(no "Pfam Domain" information available for 4AEA)

Asymmetric Unit(hide GO term definitions)

Chain A,B (3L21_NAJKA | P01391)

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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	3L21_NAJKA \| P01391	:	1ctx 1lxg 1lxh 1yi5

1ctx	ALPHA COBRATOXIN
1lxg	SOLUTION STRUCTURE OF ALPHA-COBRATOXIN COMPLEXED WITH ACOGNATE PEPTIDE (STRUCTURE ENSEMBLE)
1lxh	SOLUTION STRUCTURE OF ALPHA-COBRATOXIN COMPLEXED WITH ACOGNATE PEPTIDE (MINIMIZED AVERAGE STRUCTURE)

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