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(-) Description

Title :  CESIUM SITES IN THE CRYSTAL STRUCTURE OF A FUNCTIONAL ACID SENSING ION CHANNEL IN THE DESENSITIZED STATE
 
Authors :  E. B. Gonzales, E. Gouaux
Date :  03 Aug 09  (Deposition) - 10 Nov 09  (Release) - 10 Nov 09  (Revision)
Method :  X-RAY DIFFRACTION
Resolution :  3.00
Chains :  Asym. Unit :  A
Biol. Unit 1:  A  (3x)
Keywords :  Acid-Sensing, Functional, Ion Channel, Trimer, Membrane Protein, Sodium Channel, Cell Membrane, Glycoprotein, Ion Transport, Ionic Channel, Membrane, Sodium, Sodium Transport, Transmembrane, Transport, Transport Protein, Cesium, Anomalous (Keyword Search: [Gene Ontology, PubMed, Web (Google))
 
Reference :  E. B. Gonzales, T. Kawate, E. Gouaux
Pore Architecture And Ion Sites In Acid-Sensing Ion Channels And P2X Receptors.
Nature V. 460 599 2009
PubMed-ID: 19641589  |  Reference-DOI: 10.1038/NATURE08218
(for further references see the PDB file header)

(-) Compounds

Molecule 1 - AMILORIDE-SENSITIVE CATION CHANNEL 2, NEURONAL
    ChainsA
    EngineeredYES
    Expression SystemSPODOPTERA FRUGIPERDA
    Expression System StrainSF9
    Expression System Taxid7108
    Expression System Vector TypeBACULOVIRUS
    GeneACCN2, ASIC1
    Organism CommonBANTAM,CHICKENS
    Organism ScientificGALLUS GALLUS
    Organism Taxid9031
    SynonymACID-SENSING ION CHANNEL 1

 Structural Features

(-) Chains, Units

  1
Asymmetric Unit A
Biological Unit 1 (3x)A

Summary Information (see also Sequences/Alignments below)

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

Asymmetric Unit (2, 5)
No.NameCountTypeFull Name
1CL1Ligand/IonCHLORIDE ION
2CS4Ligand/IonCESIUM ION
Biological Unit 1 (0, 0)
No.NameCountTypeFull Name
1CL-1Ligand/IonCHLORIDE ION
2CS-1Ligand/IonCESIUM ION

(-) Sites  (5, 5)

Asymmetric Unit (5, 5)
No.NameEvidenceResiduesDescription
1AC1SOFTWARELYS A:212 , ARG A:310 , GLU A:314BINDING SITE FOR RESIDUE CL A 1
2AC2SOFTWARETHR A:237 , THR A:240BINDING SITE FOR RESIDUE CS A 467
3AC3SOFTWAREGLU A:299 , TYR A:301BINDING SITE FOR RESIDUE CS A 468
4AC4SOFTWAREASP A:433 , CS A:470BINDING SITE FOR RESIDUE CS A 469
5AC5SOFTWAREGLY A:432 , ASP A:433 , CS A:469BINDING SITE FOR RESIDUE CS A 470

(-) SS Bonds  (7, 7)

Asymmetric Unit
No.Residues
1A:94 -A:195
2A:173 -A:180
3A:291 -A:366
4A:309 -A:362
5A:313 -A:360
6A:322 -A:344
7A:324 -A:336

(-) Cis Peptide Bonds  (4, 4)

Asymmetric Unit
No.Residues
1Thr A:128 -Gln A:129
2Ala A:131 -Asp A:132
3Gly A:296 -Asp A:297
4Ile A:380 -Pro A:381

 Sequence-Structure Mapping

(-) SAPs(SNPs)/Variants  (0, 0)

(no "SAP(SNP)/Variant" information available for 3IJ4)

(-) PROSITE Motifs  (1, 1)

Asymmetric Unit (1, 1)
 PROSITEUniProtKBPDB
No.IDACDescriptionIDLocationCountLocation
1ASCPS01206 Amiloride-sensitive sodium channels signature.ASIC1_CHICK304-324  1A:304-324
Biological Unit 1 (1, 3)
 PROSITEUniProtKBPDB
No.IDACDescriptionIDLocationCountLocation
1ASCPS01206 Amiloride-sensitive sodium channels signature.ASIC1_CHICK304-324  3A:304-324

(-) Exons   (0, 0)

(no "Exon" information available for 3IJ4)

(-) 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:406
 aligned with ASIC1_CHICK | Q1XA76 from UniProtKB/Swiss-Prot  Length:527

    Alignment length:406
                                    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       365       375       385       395       405       415       425       435       445      
          ASIC1_CHICK    46 VWALCFMGSLALLALVCTNRIQYYFLYPHVTKLDEVAATRLTFPAVTFCNLNEFRFSRVTKNDLYHAGELLALLNNRYEIPDTQTADEKQLEILQDKANFRNFKPKPFNMLEFYDRAGHDIREMLLSCFFRGEQCSPEDFKVVFTRYGKCYTFNAGQDGKPRLITMKGGTGNGLEIMLDIQQDEYLPVWGETDETSFEAGIKVQIHSQDEPPLIDQLGFGVAPGFQTFVSCQEQRLIYLPPPWGDCKATTGDSEFYDTYSITACRIDCETRYLVENCNCRMVHMPGDAPYCTPEQYKECADPALDFLVEKDNEYCVCEMPCNVTRYGKELSMVKIPSKASAKYLAKKYNKSEQYIGENILVLDIFFEALNYETIEQKKAYEVAGLLGDIGGQMGLFIGASILTVLE 451
               SCOP domains ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- SCOP domains
               CATH domains 3ij4A01 A:46-73,A:424-451   3ij4A02                3ij4A03 A:97-164,A:226-245 acid-sensing ion channel 1 domain        3ij4A02 A:74-96,A:165-225,A:246-282,A:367-423                3ij4A03             3ij4A02                              3ij4A04 A:283-366 Acid-sensing ion channel domain                                   3ij4A02 A:74-96,A:165-225,A:246-282,A:367-423            3ij4A01 A:46-73,A:424-451    CATH domains
               Pfam domains ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author ....hhhhhhhhhhhhhhhhhhhhhh..eeeeeeee........eeeeee.....hhh..hhhhhhhhhhh.................hhhhhhhhhh...........hhhhhhhh...hhhh.eeeee.........eeeee....eeeee....................eeeeee..hhh................eeeeee.......hhhh.eee...eeeeeeeeeeeee.......................hhhhhhhhhhhhhhhhh...............hhhhhhhhhhhhhhhhhh...........eeeeeeeeeeeee......hhhhhhhh...hhhhhhheeeeeeee....eeeeeeee...hhhhhhhhhhhhhhh....hhhhh. Sec.struct. author
                 SAPs(SNPs) ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ASC  PDB: A:304-324  ------------------------------------------------------------------------------------------------------------------------------- PROSITE
                 Transcript ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Transcript
                 3ij4 A  46 VWALCFMGSLALLALVCTNRIQYYFLYPHVTKLDEVAATRLTFPAVTFCNLNEFRFSRVTKNDLYHAGELLALLNNRYEIPDTQTADEKQLEILQDKANFRNFKPKPFNMLEFYDRAGHDIREMLLSCFFRGEQCSPEDFKVVFTRYGKCYTFNAGQDGKPRLITMKGGTGNGLEIMLDIQQDEYLPVWGETDETSFEAGIKVQIHSQDEPPLIDQLGFGVAPGFQTFVSCQEQRLIYLPPPWGDCKATTGDSEFYDTYSITACRIDCETRYLVENCNCRMVHMPGDAPYCTPEQYKECADPALDFLVEKDNEYCVCEMPCNVTRYGKELSMVKIPSKASAKYLAKKYNKSEQYIGENILVLDIFFEALNYETIEQKKAYEVAGLLGDIGGQMGLFIGASILTVLE 451
                                    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       365       375       385       395       405       415       425       435       445      

   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  (0, 0)

(no "SCOP Domain" information available for 3IJ4)

(-) CATH Domains  (4, 4)

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

(-) Pfam Domains  (0, 0)

(no "Pfam Domain" information available for 3IJ4)

(-) Gene Ontology  (25, 25)

Asymmetric Unit(hide GO term definitions)
Chain A   (ASIC1_CHICK | Q1XA76)
molecular function
    GO:0044736    acid-sensing ion channel activity    Enables the transmembrane transfer of a sodium ion by a neuronal, voltage-insensitive channel that opens when an extracellular proton has been bound by the channel complex.
    GO:0005261    cation channel activity    Enables the energy-independent passage of cations across a lipid bilayer down a concentration gradient.
    GO:0022839    ion gated channel activity    Enables the transmembrane transfer of a solute by a channel that opens in response to a specific ion stimulus.
    GO:0015280    ligand-gated sodium channel activity    Enables the transmembrane transfer of a sodium ion by a channel that opens when a specific ligand has been bound by the channel complex or one of its constituent parts.
    GO:0005272    sodium channel activity    Enables the facilitated diffusion of a sodium ion (by an energy-independent process) involving passage through a transmembrane aqueous pore or channel without evidence for a carrier-mediated mechanism.
biological process
    GO:0008306    associative learning    Learning by associating a stimulus (the cause) with a particular outcome (the effect).
    GO:0070588    calcium ion transmembrane transport    A process in which a calcium ion is transported from one side of a membrane to the other by means of some agent such as a transporter or pore.
    GO:0006812    cation transport    The directed movement of cations, atoms or small molecules with a net positive charge, into, out of or within a cell, or between cells, by means of some agent such as a transporter or pore.
    GO:0071467    cellular response to pH    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 pH stimulus. pH is a measure of the acidity or basicity of an aqueous solution.
    GO:0034220    ion transmembrane transport    A process in which an ion is transported from one side of a membrane to the other by means of some agent such as a transporter or pore.
    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:0007613    memory    The activities involved in the mental information processing system that receives (registers), modifies, stores, and retrieves informational stimuli. The main stages involved in the formation and retrieval of memory are encoding (processing of received information by acquisition), storage (building a permanent record of received information as a result of consolidation) and retrieval (calling back the stored information and use it in a suitable way to execute a given task).
    GO:0046929    negative regulation of neurotransmitter secretion    Any process that stops, prevents, or reduces the frequency, rate or extent of the regulated release of a neurotransmitter.
    GO:0070207    protein homotrimerization    The formation of a protein homotrimer, a macromolecular structure consisting of three noncovalently associated identical subunits.
    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:0010447    response to acidic pH    Any process that results in a change in state or activity of a cell or an organism (in terms of movement, secretion, enzyme production, gene expression, etc.) as a result of a pH stimulus with pH < 7. pH is a measure of the acidity or basicity of an aqueous solution.
    GO:0050915    sensory perception of sour taste    The series of events required to receive a sour taste stimulus, convert it to a molecular signal, and recognize and characterize the signal. This is a neurological process.
    GO:0035725    sodium ion transmembrane transport    A process in which a sodium ion is transported from one side of a membrane to the other by means of some agent such as a transporter or pore.
    GO:0006814    sodium ion transport    The directed movement of sodium ions (Na+) into, out of or within a cell, or between cells, by means of some agent such as a transporter or pore.
    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: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.
    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.

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 Related Entries

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

UniProtKB/Swiss-Prot
        ASIC1_CHICK | Q1XA762qts 3s3w 3s3x 4fz0 4fz1 4ntw 4ntx 4nty 4nyk

(-) Related Entries Specified in the PDB File

3hgc IDENTICAL CRYSTAL STRUCTURE OBTAINED WITH A NATIVE CRYSTAL