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(-) Description

Title :  STRUCTURE OF THE CYTOPLASMIC BETA SUBUNIT-T1 ASSEMBLY OF VOLTAGE-DEPENDENT K CHANNELS
 
Authors :  J. M. Gulbis, M. Zhou, S. Mann, R. Mackinnon
Date :  02 May 00  (Deposition) - 19 Jul 00  (Release) - 24 Feb 09  (Revision)
Method :  X-RAY DIFFRACTION
Resolution :  2.10
Chains :  Asym. Unit :  A,E
Biol. Unit 1:  A,E  (4x)
Keywords :  Ion Channel, Oxidoreductase, Beta Subunit, Metal Transport (Keyword Search: [Gene Ontology, PubMed, Web (Google))
 
Reference :  J. M. Gulbis, M. Zhou, S. Mann, R. Mackinnon
Structure Of The Cytoplasmic Beta Subunit-T1 Assembly Of Voltage-Dependent K+ Channels.
Science V. 289 123 2000
PubMed-ID: 10884227  |  Reference-DOI: 10.1126/SCIENCE.289.5476.123
(for further references see the PDB file header)

(-) Compounds

Molecule 1 - KV BETA2 PROTEIN
    ChainsA
    EngineeredYES
    Expression SystemUNIDENTIFIED BACULOVIRUS
    Expression System PlasmidPFASTBAC1
    Expression System Taxid10469
    FragmentBETA SUBUNIT, RESIDUES 36-367
    OrganBRAIN
    Organism CommonNORWAY RAT
    Organism ScientificRATTUS NORVEGICUS
    Organism Taxid10116
 
Molecule 2 - POTASSIUM CHANNEL KV1.1
    ChainsE
    EngineeredYES
    Expression SystemUNIDENTIFIED BACULOVIRUS
    Expression System PlasmidPACG2T
    Expression System Taxid10469
    FragmentT1 DOMAIN, RESIDUES 27-129
    OrganBRAIN
    Organism CommonNORWAY RAT
    Organism ScientificRATTUS NORVEGICUS
    Organism Taxid10116

 Structural Features

(-) Chains, Units

  12
Asymmetric Unit AE
Biological Unit 1 (4x)AE

Summary Information (see also Sequences/Alignments below)

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

Asymmetric Unit (1, 1)
No.NameCountTypeFull Name
1NDP1Ligand/IonNADPH DIHYDRO-NICOTINAMIDE-ADENINE-DINUCLEOTIDEPHOSPHATE
Biological Unit 1 (1, 4)
No.NameCountTypeFull Name
1NDP4Ligand/IonNADPH DIHYDRO-NICOTINAMIDE-ADENINE-DINUCLEOTIDEPHOSPHATE

(-) Sites  (1, 1)

Asymmetric Unit (1, 1)
No.NameEvidenceResiduesDescription
1AC1SOFTWAREGLY A:55 , THR A:56 , TRP A:57 , GLN A:63 , ASP A:85 , TYR A:90 , LYS A:118 , ASN A:158 , SER A:188 , ARG A:189 , GLN A:214 , TRP A:243 , SER A:244 , PRO A:245 , LEU A:246 , ALA A:247 , CYS A:248 , GLY A:249 , SER A:252 , LYS A:254 , SER A:263 , ARG A:264 , LEU A:321 , GLY A:323 , SER A:325 , GLN A:329 , GLU A:332 , ASN A:333 , HOH A:1029 , HOH A:1052 , HOH A:1160BINDING SITE FOR RESIDUE NDP A 1000

(-) SS Bonds  (0, 0)

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

(-) Cis Peptide Bonds  (0, 0)

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

 Sequence-Structure Mapping

(-) SAPs(SNPs)/Variants  (0, 0)

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

(-) PROSITE Motifs  (0, 0)

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

(-) Exons   (15, 15)

Asymmetric Unit (15, 15)
 ENSEMBLUniProtKBPDB
No.Transcript IDExonExon IDGenome LocationLengthIDLocationLengthCountLocationLength
1.1ENSRNOT000000158401ENSRNOE00000308500chr5:169710725-169710296430KCAB2_RAT-00--
1.2ENSRNOT000000158402ENSRNOE00000112803chr5:169670219-169670091129KCAB2_RAT1-26260--
1.3ENSRNOT000000158403ENSRNOE00000109396chr5:169668964-16966892342KCAB2_RAT26-40151A:36-405
1.4ENSRNOT000000158404ENSRNOE00000109593chr5:169644460-16964441744KCAB2_RAT40-55161A:40-5516
1.5ENSRNOT000000158405ENSRNOE00000112181chr5:169643660-16964362338KCAB2_RAT55-67131A:55-6713
1.6ENSRNOT000000158406ENSRNOE00000112310chr5:169638175-16963809680KCAB2_RAT68-94271A:68-9427
1.7ENSRNOT000000158407ENSRNOE00000109963chr5:169635470-16963542645KCAB2_RAT94-109161A:94-10916
1.8ENSRNOT000000158408ENSRNOE00000110175chr5:169633990-16963394645KCAB2_RAT109-124161A:109-12416
1.9ENSRNOT000000158409ENSRNOE00000112448chr5:169632945-16963290244KCAB2_RAT124-139161A:124-13916
1.10ENSRNOT0000001584010ENSRNOE00000112513chr5:169632029-16963194387KCAB2_RAT139-168301A:139-16830
1.11ENSRNOT0000001584011ENSRNOE00000110546chr5:169628084-16962799986KCAB2_RAT168-196291A:168-19629
1.12ENSRNOT0000001584012ENSRNOE00000110711chr5:169626318-169626198121KCAB2_RAT197-237411A:197-23741
1.13ENSRNOT0000001584013ENSRNOE00000110885chr5:169626108-16962601495KCAB2_RAT237-268321A:237-26832
1.14ENSRNOT0000001584014ENSRNOE00000111076chr5:169625453-169625333121KCAB2_RAT269-309411A:269-30941
1.15ENSRNOT0000001584015ENSRNOE00000111256chr5:169624855-16962476789KCAB2_RAT309-338301A:309-33830
1.16ENSRNOT0000001584016ENSRNOE00000111460chr5:169624192-16962409994KCAB2_RAT339-367291A:339-36123

2.1ENSRNOT000000267311ENSRNOE00000192015chr4:163013488-1630120011488KCNA1_RAT1-4954951E:36-12691

(-) 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:326
 aligned with KCAB2_RAT | P62483 from UniProtKB/Swiss-Prot  Length:367

    Alignment length:326
                                    45        55        65        75        85        95       105       115       125       135       145       155       165       175       185       195       205       215       225       235       245       255       265       275       285       295       305       315       325       335       345       355      
            KCAB2_RAT    36 LQFYRNLGKSGLRVSCLGLGTWVTFGGQITDEMAEHLMTLAYDNGINLFDTAEVYAAGKAEVVLGNIIKKKGWRRSSLVITTKIFWGGKAETERGLSRKHIIEGLKASLERLQLEYVDVVFANRPDPNTPMEETVRAMTHVINQGMAMYWGTSRWSSMEIMEAYSVARQFNLIPPICEQAEYHMFQREKVEVQLPELFHKIGVGAMTWSPLACGIVSGKYDSGIPPYSRASLKGYQWLKDKILSEEGRRQQAKLKELQAIAERLGCTLPQLAIAWCLRNEGVSSVLLGASNAEQLMENIGAIQVLPKLSSSIVHEIDSILGNKPYS 361
               SCOP domains d1exba_ A: Voltage-dependent K+ channel beta subunit                                                                                                                                                                                                                                                                                   SCOP domains
               CATH domains 1exbA00 A:36-361 NADP-dependent oxidoreductase                                                                                                                                                                                                                                                                                         CATH domains
               Pfam domains -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author ...eee......eee.eeee.........hhhhhhhhhhhhhhh...eeeee.hhhhhhhhhhhhhhhhhhh.hhhhheeeeee.....hhhh...hhhhhhhhhhhhhhhhh...eeeeee.......hhhhhhhhhhhhhhh..eeeeeee..hhhhhhhhhhhhhhhh.....eeeee.....hhhhhhhhhhhhhhhh.eeeee..hhhhhhhh.........hhhhh..hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh.hhhhhhhhhhhh...eeeeee...hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh..... Sec.struct. author
                 SAPs(SNPs) -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- PROSITE
           Transcript 1 (1) 1.3  --------------Exon 1.5     Exon 1.6  PDB: A:68-94     --------------Exon 1.8        --------------Exon 1.10  PDB: A:139-168     ----------------------------Exon 1.12  PDB: A:197-237                -------------------------------Exon 1.14  PDB: A:269-309                -----------------------------Exon 1.16 [INCOMPLETE]  Transcript 1 (1)
           Transcript 1 (2) ----Exon 1.4        --------------------------------------Exon 1.7        --------------Exon 1.9        ----------------------------Exon 1.11  PDB: A:168-196    ----------------------------------------Exon 1.13  PDB: A:237-268       ----------------------------------------Exon 1.15  PDB: A:309-338     ----------------------- Transcript 1 (2)
                 1exb A  36 LQFYRNLGKSGLRVSCLGLGTWVTFGGQITDEMAEHLMTLAYDNGINLFDTAEVYAAGKAEVVLGNIIKKKGWRRSSLVITTKIFWGGKAETERGLSRKHIIEGLKASLERLQLEYVDVVFANRPDPNTPMEETVRAMTHVINQGMAMYWGTSRWSSMEIMEAYSVARQFNLIPPICEQAEYHMFQREKVEVQLPELFHKIGVGAMTWSPLACGIVSGKYDSGIPPYSRASLKGYQWLKDKILSEEGRRQQAKLKELQAIAERLGCTLPQLAIAWCLRNEGVSSVLLGASNAEQLMENIGAIQVLPKLSSSIVHEIDSILGNKPYS 361
                                    45        55        65        75        85        95       105       115       125       135       145       155       165       175       185       195       205       215       225       235       245       255       265       275       285       295       305       315       325       335       345       355      

Chain E from PDB  Type:PROTEIN  Length:91
 aligned with KCNA1_RAT | P10499 from UniProtKB/Swiss-Prot  Length:495

    Alignment length:91
                                    45        55        65        75        85        95       105       115       125 
            KCNA1_RAT    36 CERVVINISGLRFETQLKTLAQFPNTLLGNPKKRMRYFDPLRNEYFFDRNRPSFDAILYYYQSGGRLRRPVNVPLDMFSEEIKFYELGEEA 126
               SCOP domains d1exbe_ E: KV1.1                                                                            SCOP domains
               CATH domains 1exbE00 E:36-126 Potassium Channel Kv1.1; Chain A                                           CATH domains
               Pfam domains ------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author ..eeeeee..eeeeeehhhhhh.......hhhhhh..ee....eeee..hhhhhhhhhhhhhh..........hhhhhhhhhhhh...... Sec.struct. author
                 SAPs(SNPs) ------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE ------------------------------------------------------------------------------------------- PROSITE
               Transcript 2 Exon 2.1  PDB: E:36-126 UniProt: 1-495 [INCOMPLETE]                                         Transcript 2
                 1exb E  36 CERVVINISGLRFETQLKTLAQFPNTLLGNPKKRMRYFDPLRNEYFFDRNRPSFDAILYYYQSGGRLRRPVNVPLDMFSEEIKFYELGEEA 126
                                    45        55        65        75        85        95       105       115       125 

   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

(-) CATH Domains  (2, 2)

Asymmetric Unit
(-)
Class: Alpha Beta (26913)

(-) Pfam Domains  (0, 0)

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

(-) Gene Ontology  (66, 84)

Asymmetric Unit(hide GO term definitions)
Chain A   (KCAB2_RAT | P62483)
molecular function
    GO:0004033    aldo-keto reductase (NADP) activity    Catalysis of the reaction: an alcohol + NADP+ = an aldehyde or a ketone + NADPH + H+.
    GO:0044325    ion channel binding    Interacting selectively and non-covalently with one or more specific sites on an ion channel, a protein complex that spans a membrane and forms a water-filled channel across the phospholipid bilayer allowing selective ion transport down its electrochemical gradient.
    GO:0016491    oxidoreductase activity    Catalysis of an oxidation-reduction (redox) reaction, a reversible chemical reaction in which the oxidation state of an atom or atoms within a molecule is altered. One substrate acts as a hydrogen or electron donor and becomes oxidized, while the other acts as hydrogen or electron acceptor and becomes reduced.
    GO:0015459    potassium channel regulator activity    Modulates potassium channel activity via direct interaction interaction with a potassium channel (binding or modification).
    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: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.
    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:0070995    NADPH oxidation    A metabolic process that results in the oxidation of reduced nicotinamide adenine dinucleotide, NADPH, to the oxidized form, NADP.
    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:0045445    myoblast differentiation    The process in which a relatively unspecialized cell acquires specialized features of a myoblast. A myoblast is a mononucleate cell type that, by fusion with other myoblasts, gives rise to the myotubes that eventually develop into striated muscle fibers.
    GO:0055114    oxidation-reduction process    A metabolic process that results in the removal or addition of one or more electrons to or from a substance, with or without the concomitant removal or addition of a proton or protons.
    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:0051291    protein heterooligomerization    The process of creating protein oligomers, compounds composed of a small number, usually between three and ten, of component monomers that are not all identical. Oligomers may be formed by the polymerization of a number of monomers or the depolymerization of a large protein polymer.
    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:1901379    regulation of potassium ion transmembrane transport    Any process that modulates the frequency, rate or extent of potassium ion transmembrane transport.
    GO:2000008    regulation of protein localization to cell surface    Any process that modulates the frequency, rate or extent of protein localization to the cell surface.
    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:0030424    axon    The long process of a neuron that conducts nerve impulses, usually away from the cell body to the terminals and varicosities, which are sites of storage and release of neurotransmitter.
    GO:0030054    cell junction    A cellular component that forms a specialized region of connection between two or more cells or between a cell and the extracellular matrix. At a cell junction, anchoring proteins extend through the plasma membrane to link cytoskeletal proteins in one cell to cytoskeletal proteins in neighboring cells or to proteins in the extracellular matrix.
    GO:0042995    cell projection    A prolongation or process extending from a cell, e.g. a flagellum or axon.
    GO:0005737    cytoplasm    All of the contents of a cell excluding the plasma membrane and nucleus, but including other subcellular structures.
    GO:0005856    cytoskeleton    Any of the various filamentous elements that form the internal framework of cells, and typically remain after treatment of the cells with mild detergent to remove membrane constituents and soluble components of the cytoplasm. The term embraces intermediate filaments, microfilaments, microtubules, the microtrabecular lattice, and other structures characterized by a polymeric filamentous nature and long-range order within the cell. The various elements of the cytoskeleton not only serve in the maintenance of cellular shape but also have roles in other cellular functions, including cellular movement, cell division, endocytosis, and movement of organelles.
    GO:0005829    cytosol    The part of the cytoplasm that does not contain organelles but which does contain other particulate matter, such as protein complexes.
    GO:0031234    extrinsic component of cytoplasmic side of plasma membrane    The component of a plasma membrane consisting of gene products and protein complexes that are loosely bound to its cytoplasmic surface, but not integrated into the hydrophobic region.
    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:0044224    juxtaparanode region of axon    A region of an axon near a node of Ranvier that is between the paranode and internode regions.
    GO:0016020    membrane    A lipid bilayer along with all the proteins and protein complexes embedded in it an attached to it.
    GO:0005874    microtubule    Any of the long, generally straight, hollow tubes of internal diameter 12-15 nm and external diameter 24 nm found in a wide variety of eukaryotic cells; each consists (usually) of 13 protofilaments of polymeric tubulin, staggered in such a manner that the tubulin monomers are arranged in a helical pattern on the microtubular surface, and with the alpha/beta axes of the tubulin subunits parallel to the long axis of the tubule; exist in equilibrium with pool of tubulin monomers and can be rapidly assembled or disassembled in response to physiological stimuli; concerned with force generation, e.g. in the spindle.
    GO:0043005    neuron projection    A prolongation or process extending from a nerve cell, e.g. an axon or dendrite.
    GO:1990031    pinceau fiber    Dense plexus formed by the descending collaterals of cerebellar basket cells that wrap around a Purkinje cell axonal initial segment.
    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:0034705    potassium channel complex    An ion channel complex through which potassium ions pass.
    GO:0045202    synapse    The junction between a nerve fiber of one neuron and another neuron, muscle fiber or glial cell. As the nerve fiber approaches the synapse it enlarges into a specialized structure, the presynaptic nerve ending, which contains mitochondria and synaptic vesicles. At the tip of the nerve ending is the presynaptic membrane; facing it, and separated from it by a minute cleft (the synaptic cleft) is a specialized area of membrane on the receiving cell, known as the postsynaptic membrane. In response to the arrival of nerve impulses, the presynaptic nerve ending secretes molecules of neurotransmitters into the synaptic cleft. These diffuse across the cleft and transmit the signal to the postsynaptic membrane.

Chain E   (KCNA1_RAT | P10499)
molecular function
    GO:0005251    delayed rectifier potassium channel activity    Enables the transmembrane transfer of a potassium ion by a delayed rectifying voltage-gated channel. A delayed rectifying current-voltage relation is one where channel activation kinetics are time-dependent, and inactivation is slow.
    GO:0005216    ion channel activity    Enables the facilitated diffusion of an ion (by an energy-independent process) by passage through a transmembrane aqueous pore or channel without evidence for a carrier-mediated mechanism. May be either selective (it enables passage of a specific ion only) or non-selective (it enables passage of two or more ions of same charge but different size).
    GO:0005267    potassium channel activity    Enables the facilitated diffusion of a potassium ion (by an energy-independent process) involving passage through a transmembrane aqueous pore or channel without evidence for a carrier-mediated mechanism.
    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: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.
    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:0007420    brain development    The process whose specific outcome is the progression of the brain over time, from its formation to the mature structure. Brain development begins with patterning events in the neural tube and ends with the mature structure that is the center of thought and emotion. The brain is responsible for the coordination and control of bodily activities and the interpretation of information from the senses (sight, hearing, smell, etc.).
    GO:0010644    cell communication by electrical coupling    The process that mediates signaling interactions between one cell and another cell by transfer of current between their adjacent cytoplasms via intercellular protein channels.
    GO:0034613    cellular protein localization    Any process in which a protein is transported to, and/or maintained in, a specific location at the level of a cell. Localization at the cellular level encompasses movement within the cell, from within the cell to the cell surface, or from one location to another at the surface of a cell.
    GO:0071286    cellular response to magnesium ion    Any process that results in a change in state or activity of a cell (in terms of movement, secretion, enzyme production, gene expression, etc.) as a result of a magnesium ion stimulus.
    GO:0050966    detection of mechanical stimulus involved in sensory perception of pain    The series of events involved in the perception of pain in which a mechanical stimulus is received and converted into a molecular signal.
    GO:0050976    detection of mechanical stimulus involved in sensory perception of touch    The series of events involved in the perception of touch in which a mechanical stimulus is received and converted into a molecular signal.
    GO:0021766    hippocampus development    The progression of the hippocampus over time from its initial formation until its mature state.
    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:0010960    magnesium ion homeostasis    Any process involved in the maintenance of an internal steady state of magnesium ions within an organism or cell.
    GO:0007405    neuroblast proliferation    The expansion of a neuroblast population by cell division. A neuroblast is any cell that will divide and give rise to a neuron.
    GO:0050905    neuromuscular process    Any process pertaining to the functions of the nervous and muscular systems of an organism.
    GO:0019228    neuronal action potential    An action potential that occurs in a neuron.
    GO:0023041    neuronal signal transduction    The process in which an activated neuronal cell receptor conveys information down a signaling pathway, resulting in a change in the function or state of a cell. This process may be intracellular or intercellular.
    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:0051260    protein homooligomerization    The process of creating protein oligomers, compounds composed of a small number, usually between three and ten, of identical component monomers. Oligomers may be formed by the polymerization of a number of monomers or the depolymerization of a large protein polymer.
    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:0042391    regulation of membrane potential    Any process that modulates the establishment or extent of a membrane potential, the electric potential existing across any membrane arising from charges in the membrane itself and from the charges present in the media on either side of the membrane.
    GO:0006937    regulation of muscle contraction    Any process that modulates the frequency, rate or extent of muscle contraction.
    GO:0001964    startle response    An action or movement due to the application of a sudden unexpected stimulus.
    GO:0055085    transmembrane transport    The process in which a solute is transported across a lipid bilayer, 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:0016324    apical plasma membrane    The region of the plasma membrane located at the apical end of the cell.
    GO:0030424    axon    The long process of a neuron that conducts nerve impulses, usually away from the cell body to the terminals and varicosities, which are sites of storage and release of neurotransmitter.
    GO:0043679    axon terminus    Terminal inflated portion of the axon, containing the specialized apparatus necessary to release neurotransmitters. The axon terminus is considered to be the whole region of thickening and the terminal button is a specialized region of it.
    GO:0030054    cell junction    A cellular component that forms a specialized region of connection between two or more cells or between a cell and the extracellular matrix. At a cell junction, anchoring proteins extend through the plasma membrane to link cytoskeletal proteins in one cell to cytoskeletal proteins in neighboring cells or to proteins in the extracellular matrix.
    GO:0042995    cell projection    A prolongation or process extending from a cell, e.g. a flagellum or axon.
    GO:0009986    cell surface    The external part of the cell wall and/or plasma membrane.
    GO:0031410    cytoplasmic vesicle    A vesicle found in the cytoplasm of a cell.
    GO:0005829    cytosol    The part of the cytoplasm that does not contain organelles but which does contain other particulate matter, such as protein complexes.
    GO:0030425    dendrite    A neuron projection that has a short, tapering, often branched, morphology, receives and integrates signals from other neurons or from sensory stimuli, and conducts a nerve impulse towards the axon or the cell body. In most neurons, the impulse is conveyed from dendrites to axon via the cell body, but in some types of unipolar neuron, the impulse does not travel via the cell body.
    GO:0005783    endoplasmic reticulum    The irregular network of unit membranes, visible only by electron microscopy, that occurs in the cytoplasm of many eukaryotic cells. The membranes form a complex meshwork of tubular channels, which are often expanded into slitlike cavities called cisternae. The ER takes two forms, rough (or granular), with ribosomes adhering to the outer surface, and smooth (with no ribosomes attached).
    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:0044224    juxtaparanode region of axon    A region of an axon near a node of Ranvier that is between the paranode and internode regions.
    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:0033270    paranode region of axon    An axon part that is located adjacent to the nodes of Ranvier and surrounded by lateral loop portions of myelin sheath.
    GO:0043204    perikaryon    The portion of the cell soma (neuronal cell body) that excludes the nucleus.
    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:0034705    potassium channel complex    An ion channel complex through which potassium ions pass.
    GO:0042734    presynaptic membrane    A specialized area of membrane of the axon terminal that faces the plasma membrane of the neuron or muscle fiber with which the axon terminal establishes a synaptic junction; many synaptic junctions exhibit structural presynaptic characteristics, such as conical, electron-dense internal protrusions, that distinguish it from the remainder of the axon plasma membrane.
    GO:0045202    synapse    The junction between a nerve fiber of one neuron and another neuron, muscle fiber or glial cell. As the nerve fiber approaches the synapse it enlarges into a specialized structure, the presynaptic nerve ending, which contains mitochondria and synaptic vesicles. At the tip of the nerve ending is the presynaptic membrane; facing it, and separated from it by a minute cleft (the synaptic cleft) is a specialized area of membrane on the receiving cell, known as the postsynaptic membrane. In response to the arrival of nerve impulses, the presynaptic nerve ending secretes molecules of neurotransmitters into the synaptic cleft. These diffuse across the cleft and transmit the signal to the postsynaptic membrane.
    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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 Related Entries

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

UniProtKB/Swiss-Prot
        KCAB2_RAT | P624831qrq 2a79 2r9r 3eau 3eb3 3eb4 3lnm 3lut 4jta 4jtc 4jtd

(-) Related Entries Specified in the PDB File

1qrq BETA SUBUNIT STRUCTURE
1t1d T1 DOMAIN