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(-) Description

Title :  SOLUTION STRUCTURE OF THE CALMODULIN BINDING DOMAIN (CAMBD) OF SMALL CONDUCTANCE CA2+-ACTIVATED POTASSIUM CHANNELS (SK2)
 
Authors :  R. Wissmann, W. Bildl, H. Neumann, A. F. Rivard, N. Kloecker, D. Weitz, U. Schulte, J. P. Adelman, D. Bentrop, B. Fakler
Date :  07 Dec 01  (Deposition) - 14 Dec 01  (Release) - 24 Feb 09  (Revision)
Method :  SOLUTION NMR
Resolution :  NOT APPLICABLE
Chains :  NMR Structure  :  A  (23x)
Keywords :  Small-Conductance Calcium-Activated Potassium Channel, Calmodulin Binding Domain (Cambd), Channel Gating, Signaling Protein (Keyword Search: [Gene Ontology, PubMed, Web (Google))
 
Reference :  R. Wissmann, W. Bildl, H. Neumann, A. F. Rivard, N. Klocker, D. Weitz, U. Schulte, J. P. Adelman, D. Bentrop, B. Fakler
A Helical Region In The C Terminus Of Small-Conductance Ca2+-Activated K+ Channels Controls Assembly With Apo-Calmodulin.
J. Biol. Chem. V. 277 4558 2002
PubMed-ID: 11723128  |  Reference-DOI: 10.1074/JBC.M109240200
(for further references see the PDB file header)

(-) Compounds

Molecule 1 - SMALL CONDUCTANCE CALCIUM-ACTIVATED POTASSIUM CHANNEL PROTEIN 2
    ChainsA
    EngineeredYES
    Expression SystemESCHERICHIA COLI BL21(DE3)
    Expression System PlasmidPET23B
    Expression System StrainBL21(DE3)
    Expression System Taxid469008
    Expression System Vector TypePLASMID
    FragmentCYTOPLASMIC CALMODULIN BINDING DOMAIN (CAMBD)
    GeneSK2 (KCNN2)
    Organism CommonNORWAY RAT
    Organism ScientificRATTUS NORVEGICUS
    Organism Taxid10116
    SynonymCALCIUM-ACTIVATED POTASSIUM CHANNEL RSK2;
SK2

 Structural Features

(-) Chains, Units

  
NMR Structure (23x)

Summary Information (see also Sequences/Alignments below)

(-) Ligands, Modified Residues, Ions  (0, 0)

(no "Ligand,Modified Residues,Ions" information available for 1KKD)

(-) Sites  (0, 0)

(no "Site" information available for 1KKD)

(-) SS Bonds  (0, 0)

(no "SS Bond" information available for 1KKD)

(-) Cis Peptide Bonds  (0, 0)

(no "Cis Peptide Bond" information available for 1KKD)

 Sequence-Structure Mapping

(-) SAPs(SNPs)/Variants  (0, 0)

(no "SAP(SNP)/Variant" information available for 1KKD)

(-) PROSITE Motifs  (0, 0)

(no "PROSITE Motif" information available for 1KKD)

(-) Exons   (4, 4)

NMR Structure (4, 4)
 ENSEMBLUniProtKBPDB
No.Transcript IDExonExon IDGenome LocationLengthIDLocationLengthCountLocationLength
1.1bENSRNOT000000225301bENSRNOE00000159150chr18:39560962-39561450489KCNN2_RAT1-1631630--
1.2ENSRNOT000000225302ENSRNOE00000159353chr18:39562034-3956212996KCNN2_RAT164-195320--
1.3ENSRNOT000000225303ENSRNOE00000159578chr18:39598190-39598608419KCNN2_RAT196-3351400--
1.5ENSRNOT000000225305ENSRNOE00000159802chr18:39671730-39671871142KCNN2_RAT335-382480--
1.6ENSRNOT000000225306ENSRNOE00000160009chr18:39689035-39689145111KCNN2_RAT383-419371A:1-2424
1.7ENSRNOT000000225307ENSRNOE00000160206chr18:39696494-39696621128KCNN2_RAT420-462431A:25-6743
1.8ENSRNOT000000225308ENSRNOE00000160417chr18:39702600-3970266970KCNN2_RAT462-485241A:67-9024
1.9ENSRNOT000000225309ENSRNOE00000160624chr18:39704750-39705037288KCNN2_RAT486-580951A:91-922

(-) Sequences/Alignments

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:92
 aligned with KCNN2_RAT | P70604 from UniProtKB/Swiss-Prot  Length:580

    Alignment length:92
                                   405       415       425       435       445       455       465       475       485  
            KCNN2_RAT   396 RKLELTKAEKHVHNFMMDTQLTKRVKNAAANVLRETWLIYKNTKLVKKIDHAKVRKHQRKFLQAIHQLRSVKMEQRKLNDQANTLVDLAKTQ 487
               SCOP domains d1kkda_ A: Small-conductance potassium channel                                               SCOP domains
               CATH domains 1kkdA00 A:1-92  [code=1.10.287.70, no name defined]                                          CATH domains
               Pfam domains -------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author ..................................hhhhhh.................................................... Sec.struct. author
                 SAPs(SNPs) -------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE -------------------------------------------------------------------------------------------- PROSITE
           Transcript 1 (1) Exon 1.6  PDB: A:1-24   Exon 1.7  PDB: A:25-67 UniProt: 420-462    -----------------------1. Transcript 1 (1)
           Transcript 1 (2) ------------------------------------------------------------------Exon 1.8  PDB: A:67-90  -- Transcript 1 (2)
                 1kkd A   1 RKLELTKAEKHVHNFMMDTQLTKRVKNAAANVLRETWLIYKNTKLVKKIDHAKVRKHQRKFLQAIHQLRSVKMEQRKLNDQANTLVDLAKTQ  92
                                    10        20        30        40        50        60        70        80        90  

   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  (1, 1)

NMR Structure

(-) CATH Domains  (1, 1)

NMR Structure

(-) Pfam Domains  (0, 0)

(no "Pfam Domain" information available for 1KKD)

(-) Gene Ontology  (14, 14)

NMR Structure(hide GO term definitions)
Chain A   (KCNN2_RAT | P70604)
molecular function
    GO:0015269    calcium-activated potassium channel activity    Enables the calcium concentration-regulatable energy-independent passage of potassium ions across a lipid bilayer down a concentration gradient.
    GO:0005516    calmodulin binding    Interacting selectively and non-covalently with calmodulin, a calcium-binding protein with many roles, both in the calcium-bound and calcium-free states.
    GO:0005515    protein binding    Interacting selectively and non-covalently with any protein or protein complex (a complex of two or more proteins that may include other nonprotein molecules).
    GO:0016286    small conductance calcium-activated potassium channel activity    Enables the transmembrane transfer of potassium by a channel with a unit conductance of 2 to 20 picoSiemens that opens in response to stimulus by internal calcium ions. Small conductance calcium-activated potassium channels are more sensitive to calcium than are large conductance calcium-activated potassium channels. Transport by a channel involves catalysis of facilitated diffusion of a solute (by an energy-independent process) involving passage through a transmembrane aqueous pore or channel, without evidence for a carrier-mediated mechanism.
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:0048168    regulation of neuronal synaptic plasticity    A process that modulates neuronal synaptic plasticity, the ability of neuronal synapses to change as circumstances require. They may alter function, such as increasing or decreasing their sensitivity, or they may increase or decrease in actual numbers.
    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:0043197    dendritic spine    A small, membranous protrusion from a dendrite that forms a postsynaptic compartment - typically receiving input from a single presynapse. They function as partially isolated biochemical and an electrical compartments. Spine morphology is variable including "thin", "stubby", "mushroom", and "branched", with a continuum of intermediate morphologies. They typically terminate in a bulb shape, linked to the dendritic shaft by a restriction. Spine remodeling is though to be involved in synaptic plasticity.
    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:0043025    neuronal cell body    The portion of a neuron that includes the nucleus, but excludes cell projections such as axons and dendrites.
    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
        KCNN2_RAT | P706041g4y 1qx7 2pnv 3sjq 4g27 4g28 4j9y 4j9z 4qnh

(-) Related Entries Specified in the PDB File

1g4y THE CRYSTAL STRUCTURE OF THE SAME PROTEIN COMPLEXED WITH CA2+-LOADED CALMODULIN