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(-) Description

Title :  CRYSTAL STRUCTURE OF THE PHOSPHOTYROSIN BINDING DOMAIN(PTB) OF MOUSE DISABLED 1(DAB1)
 
Authors :  M. Yun, L. Keshvara, C. G. Park, Y. M. Zhang, J. B. Dickerson, J. Zheng, C. O. Rock, T. Curran, H. W. Park
Date :  18 Apr 03  (Deposition) - 05 Aug 03  (Release) - 24 Feb 09  (Revision)
Method :  X-RAY DIFFRACTION
Resolution :  2.10
Chains :  Asym. Unit :  A,B,C
Biol. Unit 1:  A  (1x)
Biol. Unit 2:  B  (1x)
Biol. Unit 3:  C  (1x)
Keywords :  Ptb, Signaling Protein (Keyword Search: [Gene Ontology, PubMed, Web (Google))
 
Reference :  M. Yun, L. Keshvara, C. G. Park, Y. M. Zhang, J. B. Dickerson, J. Zheng, C. O. Rock, T. Curran, H. W. Park
Crystal Structures Of The Dab Homology Domains Of Mouse Disabled 1 And 2.
J. Biol. Chem. V. 278 36572 2003
PubMed-ID: 12826668  |  Reference-DOI: 10.1074/JBC.M304384200
(for further references see the PDB file header)

(-) Compounds

Molecule 1 - DISABLED HOMOLOG 2
    ChainsA, B, C
    EngineeredYES
    Expression SystemESCHERICHIA COLI BL21(DE3)
    Expression System PlasmidPET30
    Expression System StrainBL21(DE3)
    Expression System Taxid469008
    Expression System Vector TypePLASMID
    FragmentPTB DOMAIN OF MOUSE DISABLED 2
    GeneDAB2 OR DOC2
    Organism CommonHOUSE MOUSE
    Organism ScientificMUS MUSCULUS
    Organism Taxid10090
    SynonymDOC-2, MITOGEN-RESPONSIVE PHOSPHOPROTEIN

 Structural Features

(-) Chains, Units

  123
Asymmetric Unit ABC
Biological Unit 1 (1x)A  
Biological Unit 2 (1x) B 
Biological Unit 3 (1x)  C

Summary Information (see also Sequences/Alignments below)

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

(no "Ligand,Modified Residues,Ions" information available for 1P3R)

(-) Sites  (0, 0)

(no "Site" information available for 1P3R)

(-) SS Bonds  (0, 0)

(no "SS Bond" information available for 1P3R)

(-) Cis Peptide Bonds  (0, 0)

(no "Cis Peptide Bond" information available for 1P3R)

 Sequence-Structure Mapping

(-) SAPs(SNPs)/Variants  (0, 0)

(no "SAP(SNP)/Variant" information available for 1P3R)

(-) PROSITE Motifs  (1, 3)

Asymmetric Unit (1, 3)
 PROSITEUniProtKBPDB
No.IDACDescriptionIDLocationCountLocation
1PIDPS01179 Phosphotyrosine interaction domain (PID) profile.DAB2_MOUSE45-196
 
 
  3A:45-179
B:45-180
C:45-178
Biological Unit 1 (1, 1)
 PROSITEUniProtKBPDB
No.IDACDescriptionIDLocationCountLocation
1PIDPS01179 Phosphotyrosine interaction domain (PID) profile.DAB2_MOUSE45-196
 
 
  1A:45-179
-
-
Biological Unit 2 (1, 1)
 PROSITEUniProtKBPDB
No.IDACDescriptionIDLocationCountLocation
1PIDPS01179 Phosphotyrosine interaction domain (PID) profile.DAB2_MOUSE45-196
 
 
  1-
B:45-180
-
Biological Unit 3 (1, 1)
 PROSITEUniProtKBPDB
No.IDACDescriptionIDLocationCountLocation
1PIDPS01179 Phosphotyrosine interaction domain (PID) profile.DAB2_MOUSE45-196
 
 
  1-
-
C:45-178

(-) Exons   (0, 0)

(no "Exon" information available for 1P3R)

(-) 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:148
 aligned with DAB2_MOUSE | P98078 from UniProtKB/Swiss-Prot  Length:766

    Alignment length:148
                                    41        51        61        71        81        91       101       111       121       131       141       151       161       171        
           DAB2_MOUSE    32 SEKTDEYLLARFKGDGVKYKAKLIGIDDVPDARGDKMSQDSMMKLKGMAAAGRSQGQHKQRIWVNISLSGIKIIDEKTGVIEHEHPVNKISFIARDVTDNRAFGYVCGGEGQHQFFAIKTGQQAEPLVVDLKDLFQVIYNVKKKEEDK 179
               SCOP domains d1p3ra_ A: Disabled homolog 2 (Dab2)                                                                                                                 SCOP domains
               CATH domains 1p3rA00 A:32-179 Pleckstrin-homology domain (PH domain)/Phosphotyrosine-binding domain (PTB)                                                         CATH domains
               Pfam domains ---------------------------------------------------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author ...hhhhhhhhhh...eeeeeeeeeeeee....hhhhhhhhhhhhhhhhhhhhh.....eeeeeeee..eeeeee.....eeeeehhh.eeeeee......eeeeee.....eeeeeeee...hhhhhhhhhhhhhhhhhhhhhhhh. Sec.struct. author
                 SAPs(SNPs) ---------------------------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE -------------PID  PDB: A:45-179 UniProt: 45-196                                                                                                      PROSITE
                 Transcript ---------------------------------------------------------------------------------------------------------------------------------------------------- Transcript
                 1p3r A  32 MEKTDEYLLARFKGDGVKYKAKLIGIDDVPDARGDKMSQDSMMKLKGMAAAGRSQGQHKQRIWVNISLSGIKIIDEKTGVIEHEHPVNKISFIARDVTDNRAFGYVCGGEGQHQFFAIKTGQQAEPLVVDLKDLFQVIYNVKKKEEDK 179
                                    41        51        61        71        81        91       101       111       121       131       141       151       161       171        

Chain B from PDB  Type:PROTEIN  Length:148
 aligned with DAB2_MOUSE | P98078 from UniProtKB/Swiss-Prot  Length:766

    Alignment length:148
                                    42        52        62        72        82        92       102       112       122       132       142       152       162       172        
           DAB2_MOUSE    33 EKTDEYLLARFKGDGVKYKAKLIGIDDVPDARGDKMSQDSMMKLKGMAAAGRSQGQHKQRIWVNISLSGIKIIDEKTGVIEHEHPVNKISFIARDVTDNRAFGYVCGGEGQHQFFAIKTGQQAEPLVVDLKDLFQVIYNVKKKEEDKK 180
               SCOP domains d1p3rb_ B: Disabled homolog 2 (Dab2)                                                                                                                 SCOP domains
               CATH domains 1p3rB00 B:33-180 Pleckstrin-homology domain (PH domain)/Phosphotyrosine-binding domain (PTB)                                                         CATH domains
               Pfam domains ---------------------------------------------------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author ..hhhhhhhhhh...eeeeeeeeeeeee....hhhhhhhhhhhhhhhhhhhhh.....eeeeeeee..eeeeee.....eeeeehhh.eeeeee......eeeeee.....eeeeeeee...hhhhhhhhhhhhhhhhhhhhhhhh.. Sec.struct. author
                 SAPs(SNPs) ---------------------------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE ------------PID  PDB: B:45-180 UniProt: 45-196                                                                                                       PROSITE
                 Transcript ---------------------------------------------------------------------------------------------------------------------------------------------------- Transcript
                 1p3r B  33 EKTDEYLLARFKGDGVKYKAKLIGIDDVPDARGDKMSQDSMMKLKGMAAAGRSQGQHKQRIWVNISLSGIKIIDEKTGVIEHEHPVNKISFIARDVTDNRAFGYVCGGEGQHQFFAIKTGQQAEPLVVDLKDLFQVIYNVKKKEEDKK 180
                                    42        52        62        72        82        92       102       112       122       132       142       152       162       172        

Chain C from PDB  Type:PROTEIN  Length:146
 aligned with DAB2_MOUSE | P98078 from UniProtKB/Swiss-Prot  Length:766

    Alignment length:146
                                    42        52        62        72        82        92       102       112       122       132       142       152       162       172      
           DAB2_MOUSE    33 EKTDEYLLARFKGDGVKYKAKLIGIDDVPDARGDKMSQDSMMKLKGMAAAGRSQGQHKQRIWVNISLSGIKIIDEKTGVIEHEHPVNKISFIARDVTDNRAFGYVCGGEGQHQFFAIKTGQQAEPLVVDLKDLFQVIYNVKKKEED 178
               SCOP domains d1p3rc_ C: Disabled homolog 2 (Dab2)                                                                                                               SCOP domains
               CATH domains 1p3rC00 C:33-178 Pleckstrin-homology domain (PH domain)/Phosphotyrosine-binding domain (PTB)                                                       CATH domains
           Pfam domains (1) -----------------PID-1p3rC01 C:50-176                                                                                                           -- Pfam domains (1)
           Pfam domains (2) -----------------PID-1p3rC02 C:50-176                                                                                                           -- Pfam domains (2)
           Pfam domains (3) -----------------PID-1p3rC03 C:50-176                                                                                                           -- Pfam domains (3)
         Sec.struct. author ..hhhhhhhhhh...eeeeeeeeeeeee....hhhhhhhhhhhhhhhhhhhhh.....eeeeeeee..eeeeee.....eeeeehhh.eeeeee......eeeeee.....eeeeeeee...hhhhhhhhhhhhhhhhhhhhhhh. Sec.struct. author
                 SAPs(SNPs) -------------------------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE ------------PID  PDB: C:45-178 UniProt: 45-196                                                                                                     PROSITE
                 Transcript -------------------------------------------------------------------------------------------------------------------------------------------------- Transcript
                 1p3r C  33 EKTDEYLLARFKGDGVKYKAKLIGIDDVPDARGDKMSQDSMMKLKGMAAAGRSQGQHKQRIWVNISLSGIKIIDEKTGVIEHEHPVNKISFIARDVTDNRAFGYVCGGEGQHQFFAIKTGQQAEPLVVDLKDLFQVIYNVKKKEED 178
                                    42        52        62        72        82        92       102       112       122       132       142       152       162       172      

   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, 3)

Asymmetric Unit

(-) CATH Domains  (1, 3)

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

(-) Pfam Domains  (1, 3)

Asymmetric Unit
(-)
Clan: PH (111)
(-)
Family: PID (14)
1aPID-1p3rC01C:50-176
1bPID-1p3rC02C:50-176
1cPID-1p3rC03C:50-176

(-) Gene Ontology  (68, 68)

Asymmetric Unit(hide GO term definitions)
Chain A,B,C   (DAB2_MOUSE | P98078)
molecular function
    GO:0035612    AP-2 adaptor complex binding    Interacting selectively and non-covalently with the AP-2 adaptor complex. The AP-2 adaptor complex is a heterotetrameric AP-type membrane coat adaptor complex that consists of alpha, beta2, mu2 and sigma2 subunits and links clathrin to the membrane surface of a vesicle. In at least humans, the AP-2 complex can be heterogeneric due to the existence of multiple subunit isoforms encoded by different alpha genes (alphaA and alphaC).
    GO:0046332    SMAD binding    Interacting selectively and non-covalently with a SMAD signaling protein.
    GO:0038024    cargo receptor activity    Combining selectively with an extracellular substance and delivering the substance into the cell via endocytosis.
    GO:0035615    clathrin adaptor activity    The binding activity of a molecule that brings together clathrin and one or more other molecules, permitting them to function in a coordinated way.
    GO:0030276    clathrin binding    Interacting selectively and non-covalently with a clathrin heavy or light chain, the main components of the coat of coated vesicles and coated pits, and which also occurs in synaptic vesicles.
    GO:0005178    integrin binding    Interacting selectively and non-covalently with an integrin.
    GO:0035091    phosphatidylinositol binding    Interacting selectively and non-covalently with any inositol-containing glycerophospholipid, i.e. phosphatidylinositol (PtdIns) and its phosphorylated derivatives.
    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:0008022    protein C-terminus binding    Interacting selectively and non-covalently with a protein C-terminus, the end of any peptide chain at which the 1-carboxy function of a constituent amino acid is not attached in peptide linkage to another amino-acid residue.
    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).
biological process
    GO:0016055    Wnt signaling pathway    The series of molecular signals initiated by binding of a Wnt protein to a frizzled family receptor on the surface of the target cell and ending with a change in cell state.
    GO:0007257    activation of JUN kinase activity    The initiation of the activity of the inactive enzyme JUN kinase (JNK).
    GO:0006915    apoptotic process    A programmed cell death process which begins when a cell receives an internal (e.g. DNA damage) or external signal (e.g. an extracellular death ligand), and proceeds through a series of biochemical events (signaling pathway phase) which trigger an execution phase. The execution phase is the last step of an apoptotic process, and is typically characterized by rounding-up of the cell, retraction of pseudopodes, reduction of cellular volume (pyknosis), chromatin condensation, nuclear fragmentation (karyorrhexis), plasma membrane blebbing and fragmentation of the cell into apoptotic bodies. When the execution phase is completed, the cell has died.
    GO:0030154    cell differentiation    The process in which relatively unspecialized cells, e.g. embryonic or regenerative cells, acquire specialized structural and/or functional features that characterize the cells, tissues, or organs of the mature organism or some other relatively stable phase of the organism's life history. Differentiation includes the processes involved in commitment of a cell to a specific fate and its subsequent development to the mature state.
    GO:0000904    cell morphogenesis involved in differentiation    The change in form (cell shape and size) that occurs when relatively unspecialized cells, e.g. embryonic or regenerative cells, acquire specialized structural and/or functional features that characterize the cells, tissues, or organs of the mature organism or some other relatively stable phase of the organism's life history.
    GO:0071560    cellular response to transforming growth factor beta 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 transforming growth factor beta stimulus.
    GO:0048268    clathrin coat assembly    The process that results in the assembly of clathrin triskelia into the ordered structure known as a clathrin cage.
    GO:0006897    endocytosis    A vesicle-mediated transport process in which cells take up external materials or membrane constituents by the invagination of a small region of the plasma membrane to form a new membrane-bounded vesicle.
    GO:0007492    endoderm development    The process whose specific outcome is the progression of the endoderm over time, from its formation to the mature structure. The endoderm is the innermost germ layer that develops into the gastrointestinal tract, the lungs and associated tissues.
    GO:0007588    excretion    The elimination by an organism of the waste products that arise as a result of metabolic activity. These products include water, carbon dioxide (CO2), and nitrogenous compounds.
    GO:0001701    in utero embryonic development    The process whose specific outcome is the progression of the embryo in the uterus over time, from formation of the zygote in the oviduct, to birth. An example of this process is found in Mus musculus.
    GO:0035026    leading edge cell differentiation    The process in which relatively unspecialized cells acquire specialized structural and/or functional features of leading edge cells, cells at the front of a migrating epithelial sheet.
    GO:0007275    multicellular organism development    The biological process whose specific outcome is the progression of a multicellular organism over time from an initial condition (e.g. a zygote or a young adult) to a later condition (e.g. a multicellular animal or an aged adult).
    GO:0030099    myeloid cell differentiation    The process in which a relatively unspecialized myeloid precursor cell acquires the specialized features of any cell of the myeloid leukocyte, megakaryocyte, thrombocyte, or erythrocyte lineages.
    GO:0060766    negative regulation of androgen receptor signaling pathway    Any process that decreases the rate, frequency, or extent of the androgen receptor signaling pathway.
    GO:0043066    negative regulation of apoptotic process    Any process that stops, prevents, or reduces the frequency, rate or extent of cell death by apoptotic process.
    GO:0090090    negative regulation of canonical Wnt signaling pathway    Any process that decreases the rate, frequency, or extent of the Wnt signaling pathway through beta-catenin, the series of molecular signals initiated by binding of a Wnt protein to a frizzled family receptor on the surface of the target cell, followed by propagation of the signal via beta-catenin, and ending with a change in transcription of target genes.
    GO:2001237    negative regulation of extrinsic apoptotic signaling pathway    Any process that stops, prevents or reduces the frequency, rate or extent of extrinsic apoptotic signaling pathway.
    GO:0032091    negative regulation of protein binding    Any process that stops, prevents, or reduces the frequency, rate or extent of protein binding.
    GO:1903077    negative regulation of protein localization to plasma membrane    Any process that stops, prevents or reduces the frequency, rate or extent of protein localization to plasma membrane.
    GO:0045892    negative regulation of transcription, DNA-templated    Any process that stops, prevents, or reduces the frequency, rate or extent of cellular DNA-templated transcription.
    GO:0006907    pinocytosis    An endocytosis process that results in the uptake of liquid material by cells from their external environment; literally 'cell drinking'. Liquid is enclosed in vesicles, called pinosomes, formed by invagination of the plasma membrane.
    GO:0060391    positive regulation of SMAD protein import into nucleus    Any process that increases the rate, frequency or extent of SMAD protein import into the nucleus, i.e. the directed movement of a SMAD proteins from the cytoplasm into the nucleus. Pathway-restricted SMAD proteins and common-partner SMAD proteins are involved in the transforming growth factor beta receptor signaling pathways.
    GO:2000096    positive regulation of Wnt signaling pathway, planar cell polarity pathway    Any process that activates or increases the frequency, rate or extent of Wnt signaling pathway, planar cell polarity pathway.
    GO:0045785    positive regulation of cell adhesion    Any process that activates or increases the frequency, rate or extent of cell adhesion.
    GO:0030335    positive regulation of cell migration    Any process that activates or increases the frequency, rate or extent of cell migration.
    GO:2000370    positive regulation of clathrin-dependent endocytosis    Any process that activates or increases the frequency, rate or extent of clathrin-mediated endocytosis.
    GO:2000643    positive regulation of early endosome to late endosome transport    Any process that activates or increases the frequency, rate or extent of early endosome to late endosome transport.
    GO:0045807    positive regulation of endocytosis    Any process that activates or increases the frequency, rate or extent of endocytosis.
    GO:0010718    positive regulation of epithelial to mesenchymal transition    Any process that increases the rate, frequency, or extent of epithelial to mesenchymal transition. Epithelial to mesenchymal transition is where an epithelial cell loses apical/basolateral polarity, severs intercellular adhesive junctions, degrades basement membrane components and becomes a migratory mesenchymal cell.
    GO:2001046    positive regulation of integrin-mediated signaling pathway    Any process that activates or increases the frequency, rate or extent of integrin-mediated signaling pathway.
    GO:0010862    positive regulation of pathway-restricted SMAD protein phosphorylation    Any process that increases the rate, frequency or extent of pathway-restricted SMAD protein phosphorylation. Pathway-restricted SMAD proteins and common-partner SMAD proteins are involved in the transforming growth factor beta receptor signaling pathways.
    GO:0032436    positive regulation of proteasomal ubiquitin-dependent protein catabolic process    Any process that activates or increases the frequency, rate or extent of the breakdown of a protein or peptide by hydrolysis of its peptide bonds, initiated by the covalent attachment of ubiquitin, and mediated by the proteasome.
    GO:0001934    positive regulation of protein phosphorylation    Any process that activates or increases the frequency, rate or extent of addition of phosphate groups to amino acids within a protein.
    GO:0002092    positive regulation of receptor internalization    Any process that activates or increases the frequency, rate or extent of receptor internalization.
    GO:0001921    positive regulation of receptor recycling    Any process that activates or increases the frequency, rate or extent of receptor recycling.
    GO:1900026    positive regulation of substrate adhesion-dependent cell spreading    Any process that activates or increases the frequency, rate or extent of substrate adhesion-dependent cell spreading.
    GO:0032968    positive regulation of transcription elongation from RNA polymerase II promoter    Any process that activates or increases the frequency, rate or extent of transcription elongation, the extension of an RNA molecule after transcription initiation and promoter clearance by the addition of ribonucleotides, catalyzed by RNA polymerase II.
    GO:0045893    positive regulation of transcription, DNA-templated    Any process that activates or increases the frequency, rate or extent of cellular DNA-templated transcription.
    GO:0030511    positive regulation of transforming growth factor beta receptor signaling pathway    Any process that activates or increases the frequency, rate or extent of TGF-beta receptor signaling pathway activity.
    GO:0015031    protein transport    The directed movement of proteins into, out of or within a cell, or between cells, by means of some agent such as a transporter or pore.
    GO:0006898    receptor-mediated endocytosis    An endocytosis process in which cell surface receptors ensure specificity of transport. A specific receptor on the cell surface binds tightly to the extracellular macromolecule (the ligand) that it recognizes; the plasma-membrane region containing the receptor-ligand complex then undergoes endocytosis, forming a transport vesicle containing the receptor-ligand complex and excluding most other plasma-membrane proteins. Receptor-mediated endocytosis generally occurs via clathrin-coated pits and vesicles.
    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:0030132    clathrin coat of coated pit    The coat found on coated pits and the coated vesicles derived from coated pits; comprises clathrin and the AP-2 adaptor complex.
    GO:0005905    clathrin-coated pit    A part of the endomembrane system in the form of an invagination of a membrane upon which a clathrin coat forms, and that can be converted by vesicle budding into a clathrin-coated vesicle. Coated pits form on the plasma membrane, where they are involved in receptor-mediated selective transport of many proteins and other macromolecules across the cell membrane, in the trans-Golgi network, and on some endosomes.
    GO:0030136    clathrin-coated vesicle    A vesicle with a coat formed of clathrin connected to the membrane via one of the clathrin adaptor complexes.
    GO:0030665    clathrin-coated vesicle membrane    The lipid bilayer surrounding a clathrin-coated vesicle.
    GO:0005737    cytoplasm    All of the contents of a cell excluding the plasma membrane and nucleus, but including other subcellular structures.
    GO:0031410    cytoplasmic vesicle    A vesicle found in the cytoplasm of a cell.
    GO:0070062    extracellular exosome    A vesicle that is released into the extracellular region by fusion of the limiting endosomal membrane of a multivesicular body with the plasma membrane. Extracellular exosomes, also simply called exosomes, have a diameter of about 40-100 nm.
    GO:0005925    focal adhesion    Small region on the surface of a cell that anchors the cell to the extracellular matrix and that forms a point of termination of actin filaments.
    GO:0043231    intracellular membrane-bounded organelle    Organized structure of distinctive morphology and function, bounded by a single or double lipid bilayer membrane and occurring within the cell. Includes the nucleus, mitochondria, plastids, vacuoles, and vesicles. Excludes the plasma membrane.
    GO:0016020    membrane    A lipid bilayer along with all the proteins and protein complexes embedded in it an attached to it.
    GO:0005730    nucleolus    A small, dense body one or more of which are present in the nucleus of eukaryotic cells. It is rich in RNA and protein, is not bounded by a limiting membrane, and is not seen during mitosis. Its prime function is the transcription of the nucleolar DNA into 45S ribosomal-precursor RNA, the processing of this RNA into 5.8S, 18S, and 28S components of ribosomal RNA, and the association of these components with 5S RNA and proteins synthesized outside the nucleolus. This association results in the formation of ribonucleoprotein precursors; these pass into the cytoplasm and mature into the 40S and 60S subunits of the ribosome.
    GO:0005634    nucleus    A membrane-bounded organelle of eukaryotic cells in which chromosomes are housed and replicated. In most cells, the nucleus contains all of the cell's chromosomes except the organellar chromosomes, and is the site of RNA synthesis and processing. In some species, or in specialized cell types, RNA metabolism or DNA replication may be absent.
    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:0070022    transforming growth factor beta receptor complex    A homodimeric receptor complex that consists of two TGF-beta receptor monomers.

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