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(-) Description

Title :  POTASSIUM CHANNEL FROM MAGNETOSPIRILLUM MAGNETOTACTICUM
 
Authors :  O. B. Clarke, A. T. Caputo, A. P. Hill, J. I. Vandenberg, B. J. Smith, J. M.
Date :  15 Feb 10  (Deposition) - 23 Jun 10  (Release) - 27 Jun 12  (Revision)
Method :  X-RAY DIFFRACTION
Resolution :  2.70
Chains :  Asym. Unit :  A
Biol. Unit 1:  A  (4x)
Keywords :  Integral Membrane Protein, Ion Channel, Metal Transport (Keyword Search: [Gene Ontology, PubMed, Web (Google)] )
 
Reference :  O. B. Clarke, A. T. Caputo, A. P. Hill, J. I. Vandenberg, B. J. Smith, J. M. Gulbis
Domain Reorientation And Rotation Of An Intracellular Assembly Regulate Conduction In Kir Potassium Channels.
Cell(Cambridge, Mass. ) V. 141 1018 2010
PubMed-ID: 20564790  |  Reference-DOI: 10.1016/J.CELL.2010.05.003

(-) Compounds

Molecule 1 - ATP-SENSITIVE INWARD RECTIFIER POTASSIUM CHANNEL 10
    Chains: A
    Engineered: YES
    Expression System: ESCHERICHIA COLI
    Expression System Strain: BL21(DE3)STAR
    Expression System Taxid: 469008
    Fragment: RESIDUES 26-320
    Organism Scientific: MAGNETOSPIRILLUM MAGNETOTACTICUM
    Organism Taxid: 188
    Other Details: C-TERMINAL HIS-TAG
    Synonym: KIRBAC3.1

 Structural Features

(-) Chains, Units

  1
Asymmetric Unit : A
Biological Unit 1 (4x): A

Summary Information (see also Sequences/Alignments below)

(-) Ligands, Modified Residues, Ions  (4, 16)

Asymmetric Unit (4, 16)
No.NameCountTypeFull Name
1CL1Ligand/IonCHLORIDE ION
2K10Ligand/IonPOTASSIUM ION
3PC1Ligand/IonPHOSPHOCHOLINE
4SM4Ligand/IonSAMARIUM (III) ION
Biological Unit 1 (0, 0)
No.NameCountTypeFull Name
1CL-1Ligand/IonCHLORIDE ION
2K-1Ligand/IonPOTASSIUM ION
3PC-1Ligand/IonPHOSPHOCHOLINE
4SM-1Ligand/IonSAMARIUM (III) ION

(-) Sites  (10, 10)

Asymmetric Unit (10, 10)
No.NameEvidenceResiduesDescription
01AC1SOFTWAREPHE A:195 , ARG A:202 , SER A:205 , ILE A:207 , PHE A:208 , SER A:209 , LEU A:210 , SER A:211 , HOH A:2048BINDING SITE FOR RESIDUE PC A1300
02AC2SOFTWAREGLU A:173 , ASP A:175 , HIS A:177 , HOH A:2027BINDING SITE FOR RESIDUE SM A1301
03AC3SOFTWAREGLU A:173 , ASP A:175 , THR A:244 , HOH A:2020BINDING SITE FOR RESIDUE SM A1302
04AC4SOFTWAREHOH A:2007BINDING SITE FOR RESIDUE SM A1303
05AC5SOFTWAREILE A:97 , GLY A:98 , K A:1306 , K A:1308BINDING SITE FOR RESIDUE K A1305
06AC6SOFTWARETHR A:96 , ILE A:97 , K A:1305 , K A:1307BINDING SITE FOR RESIDUE K A1306
07AC7SOFTWARETHR A:96 , K A:1306BINDING SITE FOR RESIDUE K A1307
08AC8SOFTWAREGLY A:98 , TYR A:99 , K A:1305BINDING SITE FOR RESIDUE K A1308
09AC9SOFTWARETYR A:132BINDING SITE FOR RESIDUE K A1309
10BC1SOFTWAREARG A:257BINDING SITE FOR RESIDUE CL A1315

(-) SS Bonds  (0, 0)

(no "SS Bond" information available for 2X6C)

(-) Cis Peptide Bonds  (0, 0)

(no "Cis Peptide Bond" information available for 2X6C)

 Sequence-Structure Mapping

(-) SAPs(SNPs)/Variants  (0, 0)

(no "SAP(SNP)/Variant" information available for 2X6C)

(-) PROSITE Motifs  (0, 0)

(no "PROSITE Motif" information available for 2X6C)

(-) Exons   (0, 0)

(no "Exon" information available for 2X6C)

(-) 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:264
 aligned with IRK10_MAGMG | D9N164 from UniProtKB/Swiss-Prot  Length:295

    Alignment length:288
                                                                                                                                                                                                                                                                                                                     295    
                                    21        31        41        51        61        71        81        91       101       111       121       131       141       151       161       171       181       191       201       211       221       231       241       251       261       271       281       291   |    
          IRK10_MAGMG    12 PRILNSDGSSNITRLGLEKRGWLDDHYHDLLTVSWPVFITLITGLYLVTNALFALAYLACGDVIENARPGSFTDAFFFSVQTMATIGYGKLIPIGPLANTLVTLEALCGMLGLAVAASLIYARFTRPTAGVLFSSRMVISDFEGKPTLMMRLANLRIEQIIEADVHLVLVRSEISQEGMVFRRFHDLTLTRSRSPIFSLSWTVMHPIDHHSPIYGETDETLRNSHSEFLVLFTGHHEAFAQNVHARHAYSCDEIIWGGHFVDVFTTLPDGRRALDLGKFHEIAQ----   -
               SCOP domains d2x6ca1 A:12-137          automated matches                                                                                   d2x6ca2 A:138-299 automated matches                                                                                                                                SCOP domains
               CATH domains ----------------         2x6cA01 A:37-138  [code=1.10.287.7 0, no         name defined]                                        2x6cA02 A:139-299 G protein-activated inward rectifier potassium channel 1                                                                                        CATH domains
               Pfam domains ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ Pfam domains
         Sec.struct. author ................---------hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh-......--------hhhhhhhhhh.........------.hhhhhhhhhhhhhhhhhhhhhhhhh.....eee...eeeeee..eeeeeeeeee.....eeeeeeeeeeeeeee.....eeeeeeee.....eeeee..eeeeeee..........hhhhhhhh..eeeeeeeeee.....eeeeeeeee...eee..ee...eee.....eee.hhhh..ee..... Sec.struct. author
                 SAPs(SNPs) ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ SAPs(SNPs)
                    PROSITE ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ PROSITE
                 Transcript ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ Transcript
                 2x6c A  12 PRILNSDGSSNITRLG---------HYHDLLTVSWPVFITLITGLYLVTNALFALAYLA-GDVIEN--------AFFFSVQTMATIGYGKLIP------TLVTLEALCGMLGLAVAASLIYARFTRPTAGVLFSSRMVISDFEGKPTLMMRLANLRIEAIIEADVHLVLVRSEISQEGMVFRRFHDLTLTRSRSPIFSLSWTVMHPIDHHSPIYGETDETLRNSHSEFLVLFTGHHEAFAQNVHARHAYSCDEIIWGGHFVDVFTTLPDGRRALDLGKFHEIAQHHHH 299
                                    21     |   -     |  41        51        61        |-|    |   -    |   91       101  |    111       121       131       141       151       161       171       181       191       201       211       221       231       241       251       261       271       281       291        
                                          27        37                               70 |   77       86               104    111                                                                                                                                                                                            
                                                                                       72
   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 '|'

 Classification and Annotation

(-) SCOP Domains  (2, 2)

Asymmetric Unit
(-)
Class: All beta proteins (24004)
(-)
Class: Membrane and cell surface proteins and peptides (2046)

(-) CATH Domains  (2, 2)

Asymmetric Unit
(-)
Class: Mainly Alpha (13335)
(-)
Class: Mainly Beta (13760)

(-) Pfam Domains  (0, 0)

(no "Pfam Domain" information available for 2X6C)

(-) Gene Ontology  (9, 9)

Asymmetric Unit(hide GO term definitions)
Chain A   (IRK10_MAGMG | D9N164)
molecular function
    GO:0005242    inward rectifier potassium channel activity    Enables the transmembrane transfer of a potassium ion by an inwardly-rectifying voltage-gated channel. An inwardly rectifying current-voltage relation is one where at any given driving force the inward flow of K+ ions exceeds the outward flow for the opposite driving force. The inward-rectification is due to a voltage-dependent block of the channel pore by a specific ligand or ligands, and as a result the macroscopic conductance depends on the difference between membrane voltage and the K+ equilibrium potential rather than on membrane voltage itself.
    GO:0005244    voltage-gated ion channel activity    Enables the transmembrane transfer of an ion by a voltage-gated channel. An ion is an atom or group of atoms carrying an electric charge by virtue of having gained or lost one or more electrons. 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:0034765    regulation of ion transmembrane transport    Any process that modulates the frequency, rate or extent of the directed movement of ions from one side of a membrane to the other.
    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.

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 Related Entries

(-) Entries Sharing at Least One Protein Chain (UniProt ID)

UniProtKB/Swiss-Prot
        IRK10_MAGMG | D9N164: 1xl6 2wlh 2wli 2wlj 2wlk 2wlm 2wln 2wlo 2x6a 2x6b 3zrs 4lp8

(-) Related Entries Specified in the PDB File

1xl4 INTERMEDIATE GATING STRUCTURE 1 OF THE INWARDLY RECTIFYINGK+ CHANNEL KIRBAC3.1
1xl6 INTERMEDIATE GATING STRUCTURE 2 OF THE INWARDLY RECTIFYINGK+ CHANNEL KIRBAC3.1
2wlh POTASSIUM CHANNEL FROM MAGNETOSPIRILLUM MAGNETOTACTICUM
2wli POTASSIUM CHANNEL FROM MAGNETOSPIRILLUM MAGNETOTACTICUM
2wlj POTASSIUM CHANNEL FROM MAGNETOSPIRILLUM MAGNETOTACTICUM
2wlk STRUCTURE OF THE ATP-SENSITIVE INWARD RECTIFIER POTASSIUM CHANNEL FROM MAGNETOSPIRILLUM MAGNETOTACTICUM
2wll POTASSIUM CHANNEL FROM BURKHOLDERIA PSEUDOMALLEI
2wlm POTASSIUM CHANNEL FROM MAGNETOSPIRILLUM MAGNETOTACTICUM
2wln POTASSIUM CHANNEL FROM MAGNETOSPIRILLUM MAGNETOTACTICUM
2wlo POTASSIUM CHANNEL FROM MAGNETOSPIRILLUM MAGNETOTACTICUM
2x6a POTASSIUM CHANNEL FROM MAGNETOSPIRILLUM MAGNETOTACTICUM
2x6b POTASSIUM CHANNEL FROM MAGNETOSPIRILLUM MAGNETOTACTICUM