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Title :   CRYSTAL STRUCTURE OF THE SPIN-LABELED KCSA MUTANT V48R1

Authors :   J. A. Cieslak, P. J. Focia, A. Gross

Date :   26 Jul 09 (Deposition) - 09 Feb 10 (Release) - 27 Jul 11 (Revision)

Method :   X-RAY DIFFRACTION; EPR

Resolution :   3.56

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

Keywords :   Potassium Channel, Spin-Labeled Protein, Membrane Protein, Cell Membrane, Ion Transport, Ionic Channel, Membrane, Transmembrane, Transport, Voltage-Gated Channel (Keyword Search: [Gene Ontology, PubMed, Web (Google)] )

Reference :   J. A. Cieslak, P. J. Focia, A. Gross
Electron Spin-Echo Envelope Modulation (Eseem) Reveals Wate And Phosphate Interactions With The Kcsa Potassium Channel
Biochemistry V. 49 1486 2010
PubMed-ID: 20092291 | Reference-DOI: 10.1021/BI9016523

Molecule 1 - VOLTAGE-GATED POTASSIUM CHANNEL
	Chains	:	A, B, C, D
	Engineered	:	YES
	Expression System	:	ESCHERICHIA COLI
	Expression System Plasmid	:	PQE60
	Expression System Taxid	:	562
	Expression System Vector Type	:	PLASMID
	Gene	:	KCSA, SKC1
	Mutation	:	YES
	Organism Scientific	:	STREPTOMYCES LIVIDANS
	Organism Taxid	:	1916

		1	2	3	4
Asymmetric Unit	:	A	B	C	D
Biological Unit 1 (1x)	:	A	B	C	D
Biological Unit 2 (2x)	:	A	B	C	D

Summary Information (see also Sequences/Alignments below)

Asymmetric Unit (3, 7)

No.	Name	Count	Type	Full Name
1	K	2	Ligand/Ion	POTASSIUM ION
2	MTN	4	Ligand/Ion	S-[(1-OXYL-2,2,5,5-TETRAMETHYL-2,5-DIHYDRO-1H-PYRROL-3-YL)METHYL] METHANESULFONOTHIOATE
3	TBA	1	Ligand/Ion	TETRABUTYLAMMONIUM ION

Biological Unit 1 (2, 5)

No.	Name	Count	Type	Full Name
1	K	-1	Ligand/Ion	POTASSIUM ION
2	MTN	4	Ligand/Ion	S-[(1-OXYL-2,2,5,5-TETRAMETHYL-2,5-DIHYDRO-1H-PYRROL-3-YL)METHYL] METHANESULFONOTHIOATE
3	TBA	1	Ligand/Ion	TETRABUTYLAMMONIUM ION

Biological Unit 2 (2, 10)

No.	Name	Count	Type	Full Name
1	K	-1	Ligand/Ion	POTASSIUM ION
2	MTN	8	Ligand/Ion	S-[(1-OXYL-2,2,5,5-TETRAMETHYL-2,5-DIHYDRO-1H-PYRROL-3-YL)METHYL] METHANESULFONOTHIOATE
3	TBA	2	Ligand/Ion	TETRABUTYLAMMONIUM ION

Asymmetric Unit (7, 7)

No.	Name	Evidence	Residues	Description
1	AC1	SOFTWARE	THR A:75 , THR B:75 , K B:201 , THR C:75 , THR D:75	BINDING SITE FOR RESIDUE K A 202
2	AC2	SOFTWARE	THR A:75 , VAL A:76 , K A:202 , THR B:75 , VAL B:76 , THR C:75 , VAL C:76 , THR D:75 , VAL D:76	BINDING SITE FOR RESIDUE K B 201
3	AC3	SOFTWARE	CYS A:48 , LEU A:49	BINDING SITE FOR RESIDUE MTN A 248
4	AC4	SOFTWARE	CYS B:48 , ARG B:52 , ILE B:60 , TYR B:62	BINDING SITE FOR RESIDUE MTN B 248
5	AC5	SOFTWARE	CYS C:48 , LEU C:49	BINDING SITE FOR RESIDUE MTN C 248
6	AC6	SOFTWARE	CYS D:48 , LEU D:49 , ARG D:52 , ILE D:60 , THR D:61 , TYR D:62	BINDING SITE FOR RESIDUE MTN D 248
7	AC7	SOFTWARE	THR A:74 , THR A:75 , ILE A:100 , PHE A:103 , THR B:74 , THR B:75 , ILE B:100 , PHE B:103 , THR C:75 , ILE C:100 , THR D:75	BINDING SITE FOR RESIDUE TBA B 203

(no "SS Bond" information available for 3IFX)

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

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

(no "PROSITE Motif" information available for 3IFX)

(no "Exon" information available for 3IFX)

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: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 ------------------------------------------------------------------------------------------------- SCOP domains
               CATH domains 3ifxA00 A:23-119  [code=1.10.287.70, no name defined]                                             CATH domains
               Pfam domains ------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author ...hhhhhhhhhhhhhhhhhhhhhhh............hhhhhhhhhhhhhh..........hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh.. Sec.struct. author
                 SAPs(SNPs) ------------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE ------------------------------------------------------------------------------------------------- PROSITE
                 Transcript ------------------------------------------------------------------------------------------------- Transcript
                 3ifx A  23 ALHWRAAGAATVLLVIVLLAGSYLACLAERGAPGAQLITYPRALWWSVETATTVGYGDLYPVTLWGRLVAVVVMVAGITSFGLVTAALATWFVGREQ 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 ------------------------------------------------------------------------------------------------- SCOP domains
               CATH domains 3ifxB00 B:23-119  [code=1.10.287.70, no name defined]                                             CATH domains
               Pfam domains ------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author ...hhhhhhhhhhhhhhhhhhhhhhhhhh.........hhhhhhhhhhhhh...........hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh... Sec.struct. author
                 SAPs(SNPs) ------------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE ------------------------------------------------------------------------------------------------- PROSITE
                 Transcript ------------------------------------------------------------------------------------------------- Transcript
                 3ifx B  23 ALHWRAAGAATVLLVIVLLAGSYLACLAERGAPGAQLITYPRALWWSVETATTVGYGDLYPVTLWGRLVAVVVMVAGITSFGLVTAALATWFVGREQ 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 ------------------------------------------------------------------------------------------------- SCOP domains
               CATH domains 3ifxC00 C:23-119  [code=1.10.287.70, no name defined]                                             CATH domains
               Pfam domains ------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author .....hhhhhhhhhhhhhhhhhhhhhhhh.........hhhhhhhhhhhhhh..........hhhhhhhhhhhhhhhhhhhhhhhhhhhhhh..... Sec.struct. author
                 SAPs(SNPs) ------------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE ------------------------------------------------------------------------------------------------- PROSITE
                 Transcript ------------------------------------------------------------------------------------------------- Transcript
                 3ifx C  23 ALHWRAAGAATVLLVIVLLAGSYLACLAERGAPGAQLITYPRALWWSVETATTVGYGDLYPVTLWGRLVAVVVMVAGITSFGLVTAALATWFVGREQ 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 ------------------------------------------------------------------------------------------------- SCOP domains
               CATH domains 3ifxD00 D:23-119  [code=1.10.287.70, no name defined]                                             CATH domains
               Pfam domains ------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author ...hhhhhhhhhhhhhhhhhhhhhhhhhhh........hhhhhhhhhhhhhh..........hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh... Sec.struct. author
                 SAPs(SNPs) ------------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE ------------------------------------------------------------------------------------------------- PROSITE
                 Transcript ------------------------------------------------------------------------------------------------- Transcript
                 3ifx D  23 ALHWRAAGAATVLLVIVLLAGSYLACLAERGAPGAQLITYPRALWWSVETATTVGYGDLYPVTLWGRLVAVVVMVAGITSFGLVTAALATWFVGREQ 119
                                    32        42        52        62        72        82        92       102       112

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 3IFX)

Asymmetric Unit

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	3ifxA00	A:23-119
1b	3ifxB00	B:23-119
1c	3ifxC00	C:23-119
1d	3ifxD00	D:23-119

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

Asymmetric Unit(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.

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Description

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Ligands, Modified Residues, Ions (3, 7)

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