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(-) Description

Title :  CRYSTAL STRUCTURE OF THE EUKARYOTIC STRONG INWARD-RECTIFIER K+ CHANNEL KIR2.2 AT 3.1 ANGSTROM RESOLUTION
 
Authors :  X. Tao
Date :  21 Sep 09  (Deposition) - 12 Jan 10  (Release) - 12 Jan 10  (Revision)
Method :  X-RAY DIFFRACTION
Resolution :  3.11
Chains :  Asym. Unit :  A
Biol. Unit 1:  A  (4x)
Keywords :  A Transmembrane Pore And A Cytoplasmic Pore, Metal Transport (Keyword Search: [Gene Ontology, PubMed, Web (Google)] )
 
Reference :  X. Tao, J. L. Avalos, J. Chen, R. Mackinnon
Crystal Structure Of The Eukaryotic Strong Inward-Rectifier K+ Channel Kir2. 2 At 3. 1 A Resolution.
Science V. 326 1668 2009
PubMed-ID: 20019282  |  Reference-DOI: 10.1126/SCIENCE.1180310
(for further references see the PDB file header)

(-) Compounds

Molecule 1 - INWARD-RECTIFIER K+ CHANNEL KIR2.2
    Chains: A
    Engineered: YES
    Expression System: PICHIA PASTORIS
    Expression System Plasmid: PPICZ-B
    Expression System Strain: SMD1163 HIS+
    Expression System Taxid: 4922
    Expression System Vector Type: PLASMID
    Gene: KIR2.2
    Organism Common: CHICKEN
    Organism Scientific: GALLUS GALLUS
    Organism Taxid: 9031

 Structural Features

(-) Chains, Units

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

Summary Information (see also Sequences/Alignments below)

(-) Ligands, Modified Residues, Ions  (1, 5)

Asymmetric Unit (1, 5)
No.NameCountTypeFull Name
1K5Ligand/IonPOTASSIUM ION
Biological Unit 1 (0, 0)
No.NameCountTypeFull Name
1K-1Ligand/IonPOTASSIUM ION

(-) Sites  (4, 4)

Asymmetric Unit (4, 4)
No.NameEvidenceResiduesDescription
1AC1SOFTWAREGLY A:145 , TYR A:146 , K A:502BINDING SITE FOR RESIDUE K A 501
2AC2SOFTWAREILE A:144 , GLY A:145 , K A:501 , K A:503BINDING SITE FOR RESIDUE K A 502
3AC3SOFTWARETHR A:143 , ILE A:144 , K A:502 , K A:504BINDING SITE FOR RESIDUE K A 503
4AC4SOFTWARETHR A:143 , K A:503BINDING SITE FOR RESIDUE K A 504

(-) SS Bonds  (1, 1)

Asymmetric Unit
No.Residues
1A:123 -A:155

(-) Cis Peptide Bonds  (0, 0)

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

 Sequence-Structure Mapping

(-) SAPs(SNPs)/Variants  (0, 0)

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

(-) PROSITE Motifs  (0, 0)

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

(-) Exons   (0, 0)

(no "Exon" information available for 3JYC)

(-) 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:321
 aligned with KCJ12_CHICK | F1NHE9 from UniProtKB/Swiss-Prot  Length:429

    Alignment length:330
                                    52        62        72        82        92       102       112       122       132       142       152       162       172       182       192       202       212       222       232       242       252       262       272       282       292       302       312       322       332       342       352       362       372
          KCJ12_CHICK    43 NRFVKKNGQCNVEFTNMDDKPQRYIADMFTTCVDIRWRYMLLLFSLAFLVSWLLFGLIFWLIALIHGDLENPGGDDTFKPCVLQVNGFVAAFLFSIETQTTIGYGFRCVTEECPLAVFMVVVQSIVGCIIDSFMIGAIMAKMARPKKRAQTLLFSHNAVVAMRDGKLCLMWRVGNLRKSHIVEAHVRAQLIKPRITEEGEYIPLDQIDIDVGFDKGLDRIFLVSPITILHEINEDSPLFGISRQDLETDDFEIVVILEGMVEATAMTTQARSSYLASEILWGHRFEPVLFEEKNQYKVDYSHFHKTYEVPSTPRCSAKDLVENKFLLPST 372
               SCOP domains ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ SCOP domains
               CATH domains 3jycA01           ---------3jycA02 A:70-185  [code=1.10.287.70, no name defined]                                                               3jycA01 A:43-60,A:186-372 G protein-activated inward rectifier potassium channel 1                                                                                                          CATH domains
               Pfam domains ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ Pfam domains
         Sec.struct. author ...........eeee...---------hhhhhh......hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh..........ee...hhhhhhhhhhhhhh.......ee...hhhhhhhhhhhhhhhhhhhhhhhhhhhhh..........eee...eeeeee..eeeeeeeeee.....eeeeeeeeeeeeeee.....eeeeeeeee..hhhhh..ee.....eeeeee..........hhhhhh....eeeeeeeeee....eeeee..eee...eee.......eee....eeee................hhhhhhhhhhhh... Sec.struct. author
                 SAPs(SNPs) ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ SAPs(SNPs)
                    PROSITE ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ PROSITE
                 Transcript ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ Transcript
                 3jyc A  43 NRFVKKNGQCNVEFTNMD---------MFTTCVDIRWRYMLLLFSLAFLVSWLLFGLIFWLIALIHGDLENPGGDDTFKPCVLQVNGFVAAFLFSIETQTTIGYGFRCVTEECPLAVFMVVVQSIVGCIIDSFMIGAIMAKMARPKKRAQTLLFSHNAVVAMRDGKLCLMWRVGNLRKSHIVEAHVRAQLIKPRITEEGEYIPLDQIDIDVGFDKGLDRIFLVSPITILHEINEDSPLFGISRQDLETDDFEIVVILEGMVEATAMTTQARSSYLASEILWGHRFEPVLFEEKNQYKVDYSHFHKTYEVPSTPRCSAKDLVENKFLLSNS 372
                                    52       | -       |72        82        92       102       112       122       132       142       152       162       172       182       192       202       212       222       232       242       252       262       272       282       292       302       312       322       332       342       352       362       372
                                            60        70
   Legend:   → Mismatch (orange background)
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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 '|'

 Classification and Annotation

(-) SCOP Domains  (0, 0)

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

(-) CATH Domains  (2, 2)

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

(-) Pfam Domains  (0, 0)

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

(-) Gene Ontology  (13, 13)

Asymmetric Unit(hide GO term definitions)
Chain A   (KCJ12_CHICK | F1NHE9)
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:0010107    potassium ion import    The directed movement of potassium ions into a cell or organelle.
    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:0051289    protein homotetramerization    The formation of a protein homotetramer, a macromolecular structure consisting of four noncovalently associated identical subunits.
    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:0005887    integral component of plasma membrane    The component of the plasma 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:0031224    intrinsic component of membrane    The component of a membrane consisting of the gene products having some covalently attached portion, for example part of a peptide sequence or some other covalently attached group such as a GPI anchor, which spans or is embedded in one or both leaflets 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.

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 Related Entries

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

UniProtKB/Swiss-Prot
        KCJ12_CHICK | F1NHE9: 3spc 3spg 3sph 3spi 3spj 5kuk 5kum

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