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(-) Description

Title :  CRYSTAL STRUCTURE OF THE LEUCINE ZIPPER DOMAIN OF SMALL-CONDUCTANCE CA2+-ACTIVATED K+ (SKCA) CHANNEL FROM RATTUS NORVEGICUS
 
Authors :  J. Y. Kim, M. K. Kim, G. B. Kang, C. S. Park, S. H. Eom
Date :  25 Apr 07  (Deposition) - 29 Apr 08  (Release) - 24 Feb 09  (Revision)
Method :  X-RAY DIFFRACTION
Resolution :  2.10
Chains :  Asym. Unit :  A,B
Biol. Unit 1:  A  (3x)
Biol. Unit 2:  B  (3x)
Biol. Unit 3:  A (3x),B (3x)
Keywords :  Leucine Zipper, Skca Channel, Crystal Structure, Rattus Norvegicus, Membrane Protein (Keyword Search: [Gene Ontology, PubMed, Web (Google))
 
Reference :  J. Y. Kim, M. K. Kim, G. B. Kang, C. S. Park, S. H. Eom
Crystal Structure Of The Leucine Zipper Domain Of Small-Conductance Ca2+-Activated K+ (Sk(Ca)) Channel From Rattus Norvegicus.
Proteins V. 70 568 2008
PubMed-ID: 17910055  |  Reference-DOI: 10.1002/PROT.21634
(for further references see the PDB file header)

(-) Compounds

Molecule 1 - SMALL CONDUCTANCE CALCIUM-ACTIVATED POTASSIUM CHANNEL PROTEIN 2
    ChainsA, B
    EngineeredYES
    Expression SystemESCHERICHIA COLI BL21(DE3)
    Expression System PlasmidMODIFIED PGEX VECTOR
    Expression System StrainBL21(DE3)
    Expression System Taxid469008
    Expression System Vector TypePLASMID
    FragmentLEUCINE ZIPPER DOMAIN
    GeneKCNN2
    Organism CommonNORWAY RAT
    Organism ScientificRATTUS NORVEGICUS
    Organism Taxid10116
    SynonymSK2, SMALL-CONDUCTANCE CA2+-ACTIVATED K+ (SKCA) CHANNEL

 Structural Features

(-) Chains, Units

  12
Asymmetric Unit AB
Biological Unit 1 (3x)A 
Biological Unit 2 (3x) B
Biological Unit 3 (3x)A (3x)B (3x)

Summary Information (see also Sequences/Alignments below)

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

(no "Ligand,Modified Residues,Ions" information available for 2PNV)

(-) Sites  (0, 0)

(no "Site" information available for 2PNV)

(-) SS Bonds  (0, 0)

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

(-) Cis Peptide Bonds  (0, 0)

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

 Sequence-Structure Mapping

(-) SAPs(SNPs)/Variants  (0, 0)

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

(-) PROSITE Motifs  (0, 0)

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

(-) Exons   (1, 2)

Asymmetric Unit (1, 2)
 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_RAT383-419370--
1.7ENSRNOT000000225307ENSRNOE00000160206chr18:39696494-39696621128KCNN2_RAT420-462430--
1.8ENSRNOT000000225308ENSRNOE00000160417chr18:39702600-3970266970KCNN2_RAT462-485240--
1.9ENSRNOT000000225309ENSRNOE00000160624chr18:39704750-39705037288KCNN2_RAT486-580952A:488-526
B:488-526
39
39

(-) 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    
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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:39
 aligned with KCNN2_RAT | P70604 from UniProtKB/Swiss-Prot  Length:580

    Alignment length:39
                                   497       507       517         
            KCNN2_RAT   488 NIMYDMISDLNERSEDFEKRIVTLETKLETLIGSIHALP 526
               SCOP domains --------------------------------------- SCOP domains
               CATH domains --------------------------------------- CATH domains
               Pfam domains --------------------------------------- Pfam domains
         Sec.struct. author hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh.. Sec.struct. author
                 SAPs(SNPs) --------------------------------------- SAPs(SNPs)
                    PROSITE --------------------------------------- PROSITE
               Transcript 1 Exon 1.9  PDB: A:488-526 [INCOMPLETE]   Transcript 1
                 2pnv A 488 NIMYDMISDLNERSEDFEKRIVTLETKLETLIGSIHALP 526
                                   497       507       517         

Chain B from PDB  Type:PROTEIN  Length:39
 aligned with KCNN2_RAT | P70604 from UniProtKB/Swiss-Prot  Length:580

    Alignment length:39
                                   497       507       517         
            KCNN2_RAT   488 NIMYDMISDLNERSEDFEKRIVTLETKLETLIGSIHALP 526
               SCOP domains --------------------------------------- SCOP domains
               CATH domains --------------------------------------- CATH domains
           Pfam domains (1) Ca------------------------------------- Pfam domains (1)
           Pfam domains (2) Ca------------------------------------- Pfam domains (2)
         Sec.struct. author hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh... Sec.struct. author
                 SAPs(SNPs) --------------------------------------- SAPs(SNPs)
                    PROSITE --------------------------------------- PROSITE
               Transcript 1 Exon 1.9  PDB: B:488-526 [INCOMPLETE]   Transcript 1
                 2pnv B 488 NIMYDMISDLNERSEDFEKRIVTLETKLETLIGSIHALP 526
                                   497       507       517         

   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 2PNV)

(-) CATH Domains  (0, 0)

(no "CATH Domain" information available for 2PNV)

(-) Pfam Domains  (1, 2)

Asymmetric Unit

(-) Gene Ontology  (14, 14)

Asymmetric Unit(hide GO term definitions)
Chain A,B   (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 1kkd 1qx7 3sjq 4g27 4g28 4j9y 4j9z 4qnh

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