2A9H - JenaLib

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Title :   NMR STRUCTURAL STUDIES OF A POTASSIUM CHANNEL / CHARYBDOTOXIN COMPLEX

Authors :   L. Yu, C. Sun, D. Song, J. Shen, N. Xu, A. Gunasekera, P. J. Hajduk, E. T. Olejniczak

Date :   11 Jul 05 (Deposition) - 10 Jan 06 (Release) - 24 Feb 09 (Revision)

Method :   SOLUTION NMR

Resolution :   NOT APPLICABLE

Chains :   NMR Structure  : A,B,C,D,E

Keywords :   Potassium Channel, Kcsa, Nmr, Structure, Membrane Protein, Metal Transport (Keyword Search: [Gene Ontology, PubMed, Web (Google)] )

Reference :   L. Yu, C. Sun, D. Song, J. Shen, N. Xu, A. Gunasekera, P. J. Hajduk, E. T. Olejniczak
Nuclear Magnetic Resonance Structural Studies Of A Potassium Channel-Charybdotoxin Complex.
Biochemistry V. 44 15834 2005
PubMed-ID: 16313186 | Reference-DOI: 10.1021/BI051656D
(for further references see the PDB file header)

Molecule 1 - VOLTAGE-GATED POTASSIUM CHANNEL
	Chains	:	A, B, C, D
	Engineered	:	YES
	Expression System	:	ESCHERICHIA COLI
	Expression System Plasmid	:	PIVEX-D2.4D
	Expression System Strain	:	C41 (DE3)
	Expression System Taxid	:	562
	Expression System Vector Type	:	PLASMID
	Gene	:	KCSA, SKC1
	Mutation	:	YES
	Organism Scientific	:	STREPTOMYCES LIVIDANS
	Organism Taxid	:	1916

Molecule 2 - CHARYBDOTOXIN
	Chains	:	E
	Engineered	:	YES
	Synthetic	:	YES


NMR Structure	:

Summary Information (see also Sequences/Alignments below)

NMR Structure (1, 1)

No.	Name	Count	Type	Full Name
1	PCA	1	Mod. Amino Acid	PYROGLUTAMIC ACID

(no "Site" information available for 2A9H)

NMR Structure

No.	Residues
1	E:807	-	E:828
2	E:813	-	E:833
3	E:817	-	E:835

(no "Cis Peptide Bond" information available for 2A9H)

(no "SAP(SNP)/Variant" information available for 2A9H)

NMR Structure (1, 1)

	PROSITE			UniProtKB		PDB
No.	ID	AC	Description	ID	Location	Count	Location
1	SCORP_SHORT_TOXIN	PS01138	Scorpion short toxins signature.	KAX11_LEIQH	35-57	1	E:813-835

(no "Exon" information available for 2A9H)

NMR Structure

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:97
 aligned with KCSA_STRLI | P0A334 from UniProtKB/Swiss-Prot  Length:160

    Alignment length:97
                                    32        42        52        62        72        82        92       102       112       
           KCSA_STRLI    23 ALHWRAAGAATVLLVIVLLAGSYLAVLAERGAPGAQLITYPRALWWSVETATTVGYGDLYPVTLWGRLVAVVVMVAGITSFGLVTAALATWFVGREQ 119
               SCOP domains d2a9ha1 A:23-119 Potassium channel protein                                                        SCOP domains
               CATH domains 2a9hA00 A:23-119  [code=1.10.287.70, no name defined]                                             CATH domains
               Pfam domains ------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author .hhhhhhhhhhhhhhhhhhhhhhhhhhhhh........hhhhhhhhhhhhhh..........hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh... Sec.struct. author
                 SAPs(SNPs) ------------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE ------------------------------------------------------------------------------------------------- PROSITE
                 Transcript ------------------------------------------------------------------------------------------------- Transcript
                 2a9h A  23 ALHWRAAGAATVLLVIVLLAGSYLAVLAERGAPGAALISYPDALWWSVETATTVGYGDLYPVTLWGRCVAVVVMVAGITSYGLVFAAVATWFVGREQ 119
                                    32        42        52        62        72        82        92       102       112

Chain B from PDB  Type:PROTEIN  Length:97
 aligned with KCSA_STRLI | P0A334 from UniProtKB/Swiss-Prot  Length:160

    Alignment length:97
                                    32        42        52        62        72        82        92       102       112       
           KCSA_STRLI    23 ALHWRAAGAATVLLVIVLLAGSYLAVLAERGAPGAQLITYPRALWWSVETATTVGYGDLYPVTLWGRLVAVVVMVAGITSFGLVTAALATWFVGREQ 119
               SCOP domains d2a9hb_ B: Potassium channel protein                                                              SCOP domains
               CATH domains 2a9hB00 B:23-119  [code=1.10.287.70, no name defined]                                             CATH domains
               Pfam domains ------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author .hhhhhhhhhhhhhhhhhhhhhhhhhhhhh........hhhhhhhhhhhhhh..........hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh... Sec.struct. author
                 SAPs(SNPs) ------------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE ------------------------------------------------------------------------------------------------- PROSITE
                 Transcript ------------------------------------------------------------------------------------------------- Transcript
                 2a9h B  23 ALHWRAAGAATVLLVIVLLAGSYLAVLAERGAPGAALISYPDALWWSVETATTVGYGDLYPVTLWGRCVAVVVMVAGITSYGLVFAAVATWFVGREQ 119
                                    32        42        52        62        72        82        92       102       112

Chain C from PDB  Type:PROTEIN  Length:97
 aligned with KCSA_STRLI | P0A334 from UniProtKB/Swiss-Prot  Length:160

    Alignment length:97
                                    32        42        52        62        72        82        92       102       112       
           KCSA_STRLI    23 ALHWRAAGAATVLLVIVLLAGSYLAVLAERGAPGAQLITYPRALWWSVETATTVGYGDLYPVTLWGRLVAVVVMVAGITSFGLVTAALATWFVGREQ 119
               SCOP domains d2a9hc_ C: Potassium channel protein                                                              SCOP domains
               CATH domains 2a9hC00 C:23-119  [code=1.10.287.70, no name defined]                                             CATH domains
               Pfam domains ------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author .hhhhhhhhhhhhhhhhhhhhhhhhhhhhh........hhhhhhhhhhhhhh..........hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh... Sec.struct. author
                 SAPs(SNPs) ------------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE ------------------------------------------------------------------------------------------------- PROSITE
                 Transcript ------------------------------------------------------------------------------------------------- Transcript
                 2a9h C  23 ALHWRAAGAATVLLVIVLLAGSYLAVLAERGAPGAALISYPDALWWSVETATTVGYGDLYPVTLWGRCVAVVVMVAGITSYGLVFAAVATWFVGREQ 119
                                    32        42        52        62        72        82        92       102       112

Chain D from PDB  Type:PROTEIN  Length:97
 aligned with KCSA_STRLI | P0A334 from UniProtKB/Swiss-Prot  Length:160

    Alignment length:97
                                    32        42        52        62        72        82        92       102       112       
           KCSA_STRLI    23 ALHWRAAGAATVLLVIVLLAGSYLAVLAERGAPGAQLITYPRALWWSVETATTVGYGDLYPVTLWGRLVAVVVMVAGITSFGLVTAALATWFVGREQ 119
               SCOP domains d2a9hd_ D: Potassium channel protein                                                              SCOP domains
               CATH domains 2a9hD00 D:23-119  [code=1.10.287.70, no name defined]                                             CATH domains
               Pfam domains ------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author .hhhhhhhhhhhhhhhhhhhhhhhhhhhhh........hhhhhhhhhhhhhh..........hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh... Sec.struct. author
                 SAPs(SNPs) ------------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE ------------------------------------------------------------------------------------------------- PROSITE
                 Transcript ------------------------------------------------------------------------------------------------- Transcript
                 2a9h D  23 ALHWRAAGAATVLLVIVLLAGSYLAVLAERGAPGAALISYPDALWWSVETATTVGYGDLYPVTLWGRCVAVVVMVAGITSYGLVFAAVATWFVGREQ 119
                                    32        42        52        62        72        82        92       102       112

Chain E from PDB  Type:PROTEIN  Length:37
 aligned with KAX11_LEIQH | P13487 from UniProtKB/Swiss-Prot  Length:59

    Alignment length:37
                                    32        42        52       
          KAX11_LEIQH    23 QFTNVSCTTSKECWSVCQRLHNTSRGKCMNKKCRCYS  59
               SCOP domains d2a9he1 E:801-837 Charybdotoxin       SCOP domains
               CATH domains ------------------------------------- CATH domains
               Pfam domains ------------------------------------- Pfam domains
         Sec.struct. author ........hhhhhhhhhhhhh................ Sec.struct. author
                 SAPs(SNPs) ------------------------------------- SAPs(SNPs)
                    PROSITE ------------SCORP_SHORT_TOXIN      -- PROSITE
                 Transcript ------------------------------------- Transcript
                 2a9h E 801 xFTNVSCTTSKECWSVCQRLHNTSRGKCMNKKCRCYS 837
                            |      810       820       830       
                            |                                    
                          801-PCA

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 '\|'

NMR Structure

Classes(

)

Architectures( (-)

)

Topologies( (-)

)

Homologous Superfamilies( (-)

)

Organisms( (-)

)

Class: Mainly Alpha (13335)

Architecture: Orthogonal Bundle (10391)

Topology: Helix Hairpins (718)

Homologous Superfamily: [code=1.10.287.70, no name defined] (106)

Streptomyces lividans. Organism_taxid: 1916. (3)

1a	2a9hA00	A:23-119
1b	2a9hC00	C:23-119
1c	2a9hD00	D:23-119
1d	2a9hB00	B:23-119

(no "Pfam Domain" information available for 2A9H)

NMR Structure(hide GO term definitions)

Chain A,B,C,D (KCSA_STRLI | P0A334)

molecular function
	GO:0042802	identical protein binding	Interacting selectively and non-covalently with an identical protein or proteins.
	GO:0005249	voltage-gated potassium channel activity	Enables the transmembrane transfer of a potassium ion by a voltage-gated channel. A voltage-gated channel is a channel whose open state is dependent on the voltage across the membrane in which it is embedded.
biological process
	GO:0006811	ion transport	The directed movement of charged atoms or small charged molecules into, out of or within a cell, or between cells, by means of some agent such as a transporter or pore.
	GO:0071805	potassium ion transmembrane transport	A process in which a potassium ion is transported from one side of a membrane to the other.
	GO:0006813	potassium ion transport	The directed movement of potassium ions (K+) into, out of or within a cell, or between cells, by means of some agent such as a transporter or pore.
	GO:0006810	transport	The directed movement of substances (such as macromolecules, small molecules, ions) or cellular components (such as complexes and organelles) into, out of or within a cell, or between cells, or within a multicellular organism by means of some agent such as a transporter, pore or motor protein.
cellular component
	GO:0016021	integral component of membrane	The component of a membrane consisting of the gene products and protein complexes having at least some part of their peptide sequence embedded in the hydrophobic region of the membrane.
	GO:0016020	membrane	A lipid bilayer along with all the proteins and protein complexes embedded in it an attached to it.
	GO:0005886	plasma membrane	The membrane surrounding a cell that separates the cell from its external environment. It consists of a phospholipid bilayer and associated proteins.
	GO:0008076	voltage-gated potassium channel complex	A protein complex that forms a transmembrane channel through which potassium ions may cross a cell membrane in response to changes in membrane potential.

Chain E (KAX11_LEIQH | P13487)

molecular function
	GO:0008200	ion channel inhibitor activity	Stops, prevents, or reduces the activity of an ion channel.
biological process
	GO:0006952	defense response	Reactions, triggered in response to the presence of a foreign body or the occurrence of an injury, which result in restriction of damage to the organism attacked or prevention/recovery from the infection caused by the attack.
	GO:0042742	defense response to bacterium	Reactions triggered in response to the presence of a bacterium that act to protect the cell or organism.
	GO:0050832	defense response to fungus	Reactions triggered in response to the presence of a fungus that act to protect the cell or organism.
	GO:0031640	killing of cells of other organism	Any process in an organism that results in the killing of cells of another organism, including in some cases the death of the other organism. Killing here refers to the induction of death in one cell by another cell, not cell-autonomous death due to internal or other environmental conditions.
	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.

NMR Structure
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(no "Related Entries Specified in the PDB File" available for 2A9H)

Description

Compounds

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Chains, Units

Ligands, Modified Residues, Ions (1, 1)

Sites (0, 0)

SS Bonds (3, 3)

Cis Peptide Bonds (0, 0)

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SCOP Domains (3, 5)

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