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(-) Description

Title :  CYTOPLASMIC DOMAIN STRUCTURE OF KIR2.1 CONTAINING ANDERSEN'S MUTATION R218Q AND RESCUE MUTATION T309K
 
Authors :  S. Pegan, C. Arrabit, P. A. Slesinger, S. Choe
Date :  29 Mar 06  (Deposition) - 25 Jul 06  (Release) - 24 Feb 09  (Revision)
Method :  X-RAY DIFFRACTION
Resolution :  2.02
Chains :  Asym. Unit :  A,B,C,D
Biol. Unit 1:  A,B,C,D  (1x)
Biol. Unit 2:  A,B,C,D  (2x)
Keywords :  Cytoplasmic Domains Of Kir2. 1, Andersen'S Mutation, Metal Transport (Keyword Search: [Gene Ontology, PubMed, Web (Google)] )
 
Reference :  S. Pegan, C. Arrabit, P. A. Slesinger, S. Choe
Andersen'S Syndrome Mutation Effects On The Structure And Assembly Of The Cytoplasmic Domains Of Kir2. 1.
Biochemistry V. 45 8599 2006
PubMed-ID: 16834334  |  Reference-DOI: 10.1021/BI060653D
(for further references see the PDB file header)

(-) Compounds

Molecule 1 - INWARD RECTIFIER POTASSIUM CHANNEL 2
    Chains: A, B, C, D
    Engineered: YES
    Expression System: ESCHERICHIA COLI
    Expression System Plasmid: PHIS8
    Expression System Taxid: 562
    Gene: KCNJ2, IRK1
    Mutation: YES
    Organism Common: HOUSE MOUSE
    Organism Scientific: MUS MUSCULUS
    Organism Taxid: 10090
    Synonym: POTASSIUM CHANNEL, INWARDLY RECTIFYING SUBFAMILY J MEMBER 2, INWARD RECTIFIER K+, CHANNEL KIR2.1

 Structural Features

(-) Chains, Units

  1234
Asymmetric Unit : ABCD
Biological Unit 1 (1x): ABCD
Biological Unit 2 (2x): ABCD

Summary Information (see also Sequences/Alignments below)

(-) Ligands, Modified Residues, Ions  (2, 5)

Asymmetric Unit (2, 5)
No.NameCountTypeFull Name
1K1Ligand/IonPOTASSIUM ION
2MPD4Ligand/Ion(4S)-2-METHYL-2,4-PENTANEDIOL
Biological Unit 1 (1, 4)
No.NameCountTypeFull Name
1K-1Ligand/IonPOTASSIUM ION
2MPD4Ligand/Ion(4S)-2-METHYL-2,4-PENTANEDIOL
Biological Unit 2 (1, 8)
No.NameCountTypeFull Name
1K-1Ligand/IonPOTASSIUM ION
2MPD8Ligand/Ion(4S)-2-METHYL-2,4-PENTANEDIOL

(-) Sites  (5, 5)

Asymmetric Unit (5, 5)
No.NameEvidenceResiduesDescription
1AC1SOFTWAREHOH A:820 , HOH A:823 , HOH A:942 , HOH B:825 , HOH B:903 , HOH C:832 , HOH C:901 , HOH D:871BINDING SITE FOR RESIDUE K A 800
2AC2SOFTWARESER C:234 , PRO C:244 , HIS D:42 , GLY D:43 , TYR D:337 , HOH D:849BINDING SITE FOR RESIDUE MPD D 801
3AC3SOFTWARESER A:234 , PRO A:244 , HOH A:882 , HIS B:42 , GLY B:43 , TYR B:337BINDING SITE FOR RESIDUE MPD B 802
4AC4SOFTWAREHIS A:42 , GLY A:43 , TYR A:337 , HOH A:891 , LYS D:233 , SER D:234 , PRO D:244BINDING SITE FOR RESIDUE MPD A 803
5AC5SOFTWARESER B:234 , PRO B:244 , HOH B:930 , HIS C:42 , GLY C:43 , PHE C:47 , TYR C:337BINDING SITE FOR RESIDUE MPD C 804

(-) SS Bonds  (0, 0)

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

(-) Cis Peptide Bonds  (0, 0)

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

 Sequence-Structure Mapping

(-) SAPs(SNPs)/Variants  (0, 0)

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

(-) PROSITE Motifs  (0, 0)

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

(-) Exons   (0, 0)

(no "Exon" information available for 2GIX)

(-) 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:206
 aligned with KCNJ2_MOUSE | P35561 from UniProtKB/Swiss-Prot  Length:428

    Alignment length:340
                                    40        50        60        70        80        90       100       110       120       130       140       150       160       170       180       190       200       210       220       230       240       250       260       270       280       290       300       310       320       330       340       350       360       370
          KCNJ2_MOUSE    31 GNGKSKVHTRQQCRSRFVKKDGHCNVQFINVGEKGQRYLADIFTTCVDIRWRWMLVIFCLAFVLSWLFFGCVFWLIALLHGDLDTSKVSKACVSEVNSFTAAFLFSIETQTTIGYGFRCVTDECPIAVFMVVFQSIVGCIIDAFIIGAVMAKMAKPKKRNETLVFSHNAVIAMRDGKLCLMWRVGNLRKSHLVEAHVRAQLLKSRITSEGEYIPLDQIDINVGFDSGIDRIFLVSPITIVHEIDEDSPLYDLSKQDIDNADFEIVVILEGMVEATAMTTQCRSSYLANEILWGHRYEPVLFEEKHYYKVDYSRFHKTYEVPNTPLCSARDLAEKKYILSN 370
               SCOP domains d2g          ixa_ A: automated mat                                                                                                                            ches                                                                                                                                                                                   SCOP domains
               CATH domains 2gi          xA01 A:41-190,A:191-3                                                                                                                            702gixA01 A:41-190,A:191-370 G protein-activated inward rectifier potassium channel 1                                                                                                  CATH domains
               Pfam domains ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author ...----------............eeee.....----------------------------------------------------------------------------------------------------------------------------....eee...eeeeee..eeeeeeeeee.....eeeeeeeeeeeeeee.....eeeeeeeee.........ee.....eeeeee..........hhhhhhh...eeeeeeeeee.....eeeeeeeee...eee.eee...eee....eeee.hhh..eee.......hhhhhhhhhhhhhh Sec.struct. author
                 SAPs(SNPs) ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- PROSITE
                 Transcript ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Transcript
                 2gix A  41 SHG----------RSRFVKKDGHCNVQFINVGEK----------------------------------------------------------------------------------------------------------------------------RNETLVFSHNAVIAMRDGKLCLMWRVGNLQKSHLVEAHVRAQLLKSRITSEGEYIPLDQIDINVGFDSGIDRIFLVSPITIVHEIDEDSPLYDLSKQDIDNADFEIVVILEGMVEATAMTKQCRSSYLANEILWGHRYEPVLFEEKHYYKVDYSRFHKTYEVPNTPLCSARDLAEKKYILSN 370
                              |      -   |    50        60   |     -         -         -         -         -         -         -         -         -         -         -         -       190       200       210       220       230       240       250       260       270       280       290       300       310       320       330       340       350       360       370
                             43         44                  64                                                                                                                          189                                                                                                                                                                                     


Chain B from PDB  Type:PROTEIN  Length:201
 aligned with KCNJ2_MOUSE | P35561 from UniProtKB/Swiss-Prot  Length:428

    Alignment length:335
                                    40        50        60        70        80        90       100       110       120       130       140       150       160       170       180       190       200       210       220       230       240       250       260       270       280       290       300       310       320       330       340       350       360     
          KCNJ2_MOUSE    31 GNGKSKVHTRQQCRSRFVKKDGHCNVQFINVGEKGQRYLADIFTTCVDIRWRWMLVIFCLAFVLSWLFFGCVFWLIALLHGDLDTSKVSKACVSEVNSFTAAFLFSIETQTTIGYGFRCVTDECPIAVFMVVFQSIVGCIIDAFIIGAVMAKMAKPKKRNETLVFSHNAVIAMRDGKLCLMWRVGNLRKSHLVEAHVRAQLLKSRITSEGEYIPLDQIDINVGFDSGIDRIFLVSPITIVHEIDEDSPLYDLSKQDIDNADFEIVVILEGMVEATAMTTQCRSSYLANEILWGHRYEPVLFEEKHYYKVDYSRFHKTYEVPNTPLCSARDLAEKK 365
               SCOP domains d2g          ixb_ B: automated mat                                                                                                                            ches                                                                                                                                                                              SCOP domains
               CATH domains 2gi          xB01 B:41-190,B:191-3                                                                                                                            652gixB01 B:41-190,B:191-365 G protein-activated inward rectifier potassium channel 1                                                                                             CATH domains
               Pfam domains ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author ...----------............eeee.....----------------------------------------------------------------------------------------------------------------------------..........eeeeee..eeeeeeee.......eeeeeeeeeeeeeee.....eeeeeeee..........ee.....eeeeee..........hhhhhhh...eeeeeeeeee.....eeeeeeeee...eee.eee...eee....eeee.hhh..eee.......hhhhhhh.. Sec.struct. author
                 SAPs(SNPs) ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- PROSITE
                 Transcript ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Transcript
                 2gix B  41 SHG----------RSRFVKKDGHCNVQFINVGEK----------------------------------------------------------------------------------------------------------------------------RNETLVFSHNAVIAMRDGKLCLMWRVGNLQKSHLVEAHVRAQLLKSRITSEGEYIPLDQIDINVGFDSGIDRIFLVSPITIVHEIDEDSPLYDLSKQDIDNADFEIVVILEGMVEATAMTKQCRSSYLANEILWGHRYEPVLFEEKHYYKVDYSRFHKTYEVPNTPLCSARDLAEKK 365
                              |      -   |    50        60   |     -         -         -         -         -         -         -         -         -         -         -         -       190       200       210       220       230       240       250       260       270       280       290       300       310       320       330       340       350       360     
                             43         44                  64                                                                                                                          189                                                                                                                                                                                


Chain C from PDB  Type:PROTEIN  Length:206
 aligned with KCNJ2_MOUSE | P35561 from UniProtKB/Swiss-Prot  Length:428

    Alignment length:340
                                    40        50        60        70        80        90       100       110       120       130       140       150       160       170       180       190       200       210       220       230       240       250       260       270       280       290       300       310       320       330       340       350       360       370
          KCNJ2_MOUSE    31 GNGKSKVHTRQQCRSRFVKKDGHCNVQFINVGEKGQRYLADIFTTCVDIRWRWMLVIFCLAFVLSWLFFGCVFWLIALLHGDLDTSKVSKACVSEVNSFTAAFLFSIETQTTIGYGFRCVTDECPIAVFMVVFQSIVGCIIDAFIIGAVMAKMAKPKKRNETLVFSHNAVIAMRDGKLCLMWRVGNLRKSHLVEAHVRAQLLKSRITSEGEYIPLDQIDINVGFDSGIDRIFLVSPITIVHEIDEDSPLYDLSKQDIDNADFEIVVILEGMVEATAMTTQCRSSYLANEILWGHRYEPVLFEEKHYYKVDYSRFHKTYEVPNTPLCSARDLAEKKYILSN 370
               SCOP domains d2g          ixc_ C: automated mat                                                                                                                            ches                                                                                                                                                                                   SCOP domains
               CATH domains 2gi          xC01 C:41-190,C:191-3                                                                                                                            702gixC01 C:41-190,C:191-370 G protein-activated inward rectifier potassium channel 1                                                                                                  CATH domains
               Pfam domains ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author ...----------............eeee.....----------------------------------------------------------------------------------------------------------------------------....eee...eeeeee..eeeeeeeeee.....eeeeeeeeeeeeeee.....eeeeeeeee................eeeeee..........hhhhhhh...eeeeeeeeee....eeeeeeeeee...eee.eee...eee....eeee.hhh..eee.......hhhhhhhhhhhhh. Sec.struct. author
                 SAPs(SNPs) ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- PROSITE
                 Transcript ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Transcript
                 2gix C  41 SHG----------RSRFVKKDGHCNVQFINVGEK----------------------------------------------------------------------------------------------------------------------------RNETLVFSHNAVIAMRDGKLCLMWRVGNLQKSHLVEAHVRAQLLKSRITSEGEYIPLDQIDINVGFDSGIDRIFLVSPITIVHEIDEDSPLYDLSKQDIDNADFEIVVILEGMVEATAMTKQCRSSYLANEILWGHRYEPVLFEEKHYYKVDYSRFHKTYEVPNTPLCSARDLAEKKYILSN 370
                              |      -   |    50        60   |     -         -         -         -         -         -         -         -         -         -         -         -       190       200       210       220       230       240       250       260       270       280       290       300       310       320       330       340       350       360       370
                             43         44                  64                                                                                                                          189                                                                                                                                                                                     


Chain D from PDB  Type:PROTEIN  Length:205
 aligned with KCNJ2_MOUSE | P35561 from UniProtKB/Swiss-Prot  Length:428

    Alignment length:339
                                    40        50        60        70        80        90       100       110       120       130       140       150       160       170       180       190       200       210       220       230       240       250       260       270       280       290       300       310       320       330       340       350       360         
          KCNJ2_MOUSE    31 GNGKSKVHTRQQCRSRFVKKDGHCNVQFINVGEKGQRYLADIFTTCVDIRWRWMLVIFCLAFVLSWLFFGCVFWLIALLHGDLDTSKVSKACVSEVNSFTAAFLFSIETQTTIGYGFRCVTDECPIAVFMVVFQSIVGCIIDAFIIGAVMAKMAKPKKRNETLVFSHNAVIAMRDGKLCLMWRVGNLRKSHLVEAHVRAQLLKSRITSEGEYIPLDQIDINVGFDSGIDRIFLVSPITIVHEIDEDSPLYDLSKQDIDNADFEIVVILEGMVEATAMTTQCRSSYLANEILWGHRYEPVLFEEKHYYKVDYSRFHKTYEVPNTPLCSARDLAEKKYILS 369
               SCOP domains d2g          ixd_ D: automated mat                                                                                                                            ches                                                                                                                                                                                  SCOP domains
               CATH domains 2gi          xD01 D:41-190,D:191-3                                                                                                                            692gixD01 D:41-190,D:191-369 G protein-activated inward rectifier potassium channel 1                                                                                                 CATH domains
               Pfam domains --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author ...----------............eeee...hh----------------------------------------------------------------------------------------------------------------------------hhh.eee...eeeeee..eeeeeeeeee.....eeeeeeeeeeeeeee.....eeeeeeee..........ee.....eeeeee..........hhhhhhhh..eeeeeeeeee.....eeeeeeeee...eee.eee...eee....eeee.hhh..eee.......hhhhhhhh..... Sec.struct. author
                 SAPs(SNPs) --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- PROSITE
                 Transcript --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Transcript
                 2gix D  41 SHG----------RSRFVKKDGHCNVQFINVGEK----------------------------------------------------------------------------------------------------------------------------RNETLVFSHNAVIAMRDGKLCLMWRVGNLQKSHLVEAHVRAQLLKSRITSEGEYIPLDQIDINVGFDSGIDRIFLVSPITIVHEIDEDSPLYDLSKQDIDNADFEIVVILEGMVEATAMTKQCRSSYLANEILWGHRYEPVLFEEKHYYKVDYSRFHKTYEVPNTPLCSARDLAEKKYILS 369
                              |      -   |    50        60   |     -         -         -         -         -         -         -         -         -         -         -         -       190       200       210       220       230       240       250       260       270       280       290       300       310       320       330       340       350       360         
                             43         44                  64                                                                                                                          189
   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, 4)

Asymmetric Unit
(-)
Class: All beta proteins (24004)

(-) CATH Domains  (1, 4)

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

(-) Pfam Domains  (0, 0)

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

(-) Gene Ontology  (41, 41)

Asymmetric Unit(hide GO term definitions)
Chain A,B,C,D   (KCNJ2_MOUSE | P35561)
molecular function
    GO:0042802    identical protein binding    Interacting selectively and non-covalently with an identical protein or proteins.
    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:0005546    phosphatidylinositol-4,5-bisphosphate binding    Interacting selectively and non-covalently with phosphatidylinositol-4,5-bisphosphate, a derivative of phosphatidylinositol in which the inositol ring is phosphorylated at the 4' and 5' positions.
    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:0086008    voltage-gated potassium channel activity involved in cardiac muscle cell action potential repolarization    Enables the transmembrane transfer of a potassium ion by a voltage-gated channel through the plasma membrane of a cardiac muscle cell contributing to the repolarization phase of an action potential. 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:0086001    cardiac muscle cell action potential    An action potential that occurs in a cardiac muscle cell.
    GO:0086002    cardiac muscle cell action potential involved in contraction    An action potential that occurs in a cardiac muscle cell and is involved in its contraction.
    GO:0071260    cellular response to mechanical stimulus    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 mechanical stimulus.
    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:0015693    magnesium ion transport    The directed movement of magnesium (Mg) ions into, out of or within a cell, or between cells, by means of some agent such as a transporter or pore.
    GO:0086011    membrane repolarization during action potential    The process in which ions are transported across a membrane such that the membrane potential changes in the direction from the positive membrane potential at the peak of the action potential towards the negative resting potential.
    GO:0086013    membrane repolarization during cardiac muscle cell action potential    The process in which ions are transported across a membrane such that the cardiac muscle cell plasma membrane potential changes in the direction from the positive membrane potential at the peak of the action potential towards the negative resting potential.
    GO:1901381    positive regulation of potassium ion transmembrane transport    Any process that activates or increases the frequency, rate or extent of potassium ion transmembrane transport.
    GO:0010107    potassium ion import    The directed movement of potassium ions into a cell or organelle.
    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:0051289    protein homotetramerization    The formation of a protein homotetramer, a macromolecular structure consisting of four noncovalently associated identical subunits.
    GO:0086004    regulation of cardiac muscle cell contraction    Any process that modulates the frequency, rate or extent of cardiac muscle cell contraction.
    GO:0002027    regulation of heart rate    Any process that modulates the frequency or rate of heart contraction.
    GO:0086091    regulation of heart rate by cardiac conduction    A cardiac conduction process that modulates the frequency or rate of heart contraction.
    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:0060306    regulation of membrane repolarization    Any process that modulates the establishment or extent of a membrane potential in the polarizing direction towards the resting potential, usually from positive to negative.
    GO:0014861    regulation of skeletal muscle contraction via regulation of action potential    Any process that modulates the frequency, rate or extent of skeletal muscle contraction by depolarization of muscle membrane and ionic fluxes.
    GO:0055119    relaxation of cardiac muscle    The process in which the extent of cardiac muscle contraction is reduced.
    GO:0090076    relaxation of skeletal muscle    A process in which the extent of skeletal muscle tissue contraction is reduced. Muscle relaxation involves the removal of calcium from the cytoplasm to the sarcoplasmic reticulum lumen through the action of Ca2+ ATPases.
    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:0005794    Golgi apparatus    A compound membranous cytoplasmic organelle of eukaryotic cells, consisting of flattened, ribosome-free vesicles arranged in a more or less regular stack. The Golgi apparatus differs from the endoplasmic reticulum in often having slightly thicker membranes, appearing in sections as a characteristic shallow semicircle so that the convex side (cis or entry face) abuts the endoplasmic reticulum, secretory vesicles emerging from the concave side (trans or exit face). In vertebrate cells there is usually one such organelle, while in invertebrates and plants, where they are known usually as dictyosomes, there may be several scattered in the cytoplasm. The Golgi apparatus processes proteins produced on the ribosomes of the rough endoplasmic reticulum; such processing includes modification of the core oligosaccharides of glycoproteins, and the sorting and packaging of proteins for transport to a variety of cellular locations. Three different regions of the Golgi are now recognized both in terms of structure and function: cis, in the vicinity of the cis face, trans, in the vicinity of the trans face, and medial, lying between the cis and trans regions.
    GO:0030315    T-tubule    Invagination of the plasma membrane of a muscle cell that extends inward from the cell surface around each myofibril. The ends of T-tubules make contact with the sarcoplasmic reticulum membrane.
    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: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: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:0014704    intercalated disc    A complex cell-cell junction at which myofibrils terminate in cardiomyocytes; mediates mechanical and electrochemical integration between individual cardiomyocytes. The intercalated disc contains regions of tight mechanical attachment (fasciae adherentes and desmosomes) and electrical coupling (gap junctions) between adjacent cells.
    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: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.
    GO:0005791    rough endoplasmic reticulum    The rough (or granular) endoplasmic reticulum (ER) has ribosomes adhering to the outer surface; the ribosomes are the site of translation of the mRNA for those proteins which are either to be retained within the cisternae (ER-resident proteins), the proteins of the lysosomes, or the proteins destined for export from the cell. Glycoproteins undergo their initial glycosylation within the cisternae.
    GO:0005790    smooth endoplasmic reticulum    The smooth endoplasmic reticulum (smooth ER or SER) has no ribosomes attached to it. The smooth ER is the recipient of the proteins synthesized in the rough ER. Those proteins to be exported are passed to the Golgi complex, the resident proteins are returned to the rough ER and the lysosomal proteins after phosphorylation of their mannose residues are passed to the lysosomes. Glycosylation of the glycoproteins also continues. The smooth ER is the site of synthesis of lipids, including the phospholipids. The membranes of the smooth ER also contain enzymes that catalyze a series of reactions to detoxify both lipid-soluble drugs and harmful products of metabolism. Large quantities of certain compounds such as phenobarbital cause an increase in the amount of the smooth ER.
    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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  KCNJ2_MOUSE | P35561
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  KCNJ2_MOUSE | P35561
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        KCNJ2_MOUSE | P35561: 1u4f 2xky

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