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(-) Description

Title :  CRYSTAL STRUCTURE OF CRM1/SNURPORTIN-1 COMPLEX
 
Authors :  X. Dong, A. Biswas, K. E. Suel, L. K. Jackson, R. Martinez, H. Gu, Y. M. Cho
Date :  19 Feb 09  (Deposition) - 31 Mar 09  (Release) - 13 Jul 11  (Revision)
Method :  X-RAY DIFFRACTION
Resolution :  2.90
Chains :  Asym./Biol. Unit :  A,B
Keywords :  Nuclear Transport Complex, Host-Virus Interaction, Mrna Transport, Nucleus, Phosphoprotein, Protein Transport, Rna-Binding, Transport, Transport Protein (Keyword Search: [Gene Ontology, PubMed, Web (Google))
 
Reference :  X. Dong, A. Biswas, K. E. Suel, L. K. Jackson, R. Martinez, H. Gu, Y. M. Chook
Structural Basis For Leucine-Rich Nuclear Export Signal Recognition By Crm1.
Nature V. 458 1136 2009
PubMed-ID: 19339969  |  Reference-DOI: 10.1038/NATURE07975
(for further references see the PDB file header)

(-) Compounds

Molecule 1 - EXPORTIN-1
    ChainsA
    EngineeredYES
    Expression SystemESCHERICHIA COLI
    Expression System PlasmidPGEXTEV
    Expression System StrainBL21(DE3)
    Expression System Taxid562
    Expression System Vector TypePLASMID
    GeneCRM1, XPO1
    Organism CommonHUMAN
    Organism ScientificHOMO SAPIENS
    Organism Taxid9606
    SynonymEXP1, CHROMOSOME REGION MAINTENANCE 1 PROTEIN HOMOLOG
 
Molecule 2 - SNURPORTIN-1
    ChainsB
    EngineeredYES
    Expression SystemESCHERICHIA COLI
    Expression System PlasmidPGEXTEV
    Expression System StrainBL21(DE3)
    Expression System Taxid562
    Expression System Vector TypePLASMID
    GeneRNUT1, SNUPN, SPN1
    Organism CommonHUMAN
    Organism ScientificHOMO SAPIENS
    Organism Taxid9606
    SynonymRNA U TRANSPORTER 1

 Structural Features

(-) Chains, Units

  12
Asymmetric/Biological Unit AB

Summary Information (see also Sequences/Alignments below)

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

(no "Ligand,Modified Residues,Ions" information available for 3GB8)

(-) Sites  (0, 0)

(no "Site" information available for 3GB8)

(-) SS Bonds  (0, 0)

(no "SS Bond" information available for 3GB8)

(-) Cis Peptide Bonds  (1, 1)

Asymmetric/Biological Unit
No.Residues
1Trp A:142 -Pro A:143

 Sequence-Structure Mapping

(-) SAPs(SNPs)/Variants  (0, 0)

(no "SAP(SNP)/Variant" information available for 3GB8)

(-) PROSITE Motifs  (1, 1)

Asymmetric/Biological Unit (1, 1)
 PROSITEUniProtKBPDB
No.IDACDescriptionIDLocationCountLocation
1IBBPS51214 IBB domain profile.SPN1_HUMAN11-73  1B:11-66

(-) Exons   (8, 8)

Asymmetric/Biological Unit (8, 8)
 ENSEMBLUniProtKBPDB
No.Transcript IDExonExon IDGenome LocationLengthIDLocationLengthCountLocationLength
1.1bENST000003085881bENSE00001328747chr15:75918156-75918007150SPN1_HUMAN-00--
1.3bENST000003085883bENSE00001690493chr15:75913397-75913235163SPN1_HUMAN1-53531B:1-5353
1.4ENST000003085884ENSE00001208446chr15:75909893-75909749145SPN1_HUMAN53-101491B:53-101 (gaps)49
1.5ENST000003085885ENSE00001295612chr15:75902335-75902231105SPN1_HUMAN102-136351B:102-13635
1.6ENST000003085886ENSE00001310397chr15:75901992-7590189994SPN1_HUMAN137-168321B:137-16832
1.7ENST000003085887ENSE00001311880chr15:75899654-7589955798SPN1_HUMAN168-200331B:168-20033
1.8ENST000003085888ENSE00001208428chr15:75897568-7589749178SPN1_HUMAN201-226261B:201-22626
1.9ENST000003085889ENSE00001161530chr15:75893559-7589347981SPN1_HUMAN227-253271B:227-25327
1.10ENST0000030858810ENSE00001295764chr15:75891022-75890424599SPN1_HUMAN254-3601071B:254-29441

(-) Sequences/Alignments

Asymmetric/Biological 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:959
 aligned with XPO1_HUMAN | O14980 from UniProtKB/Swiss-Prot  Length:1071

    Alignment length:1010
                                    62        72        82        92       102       112       122       132       142       152       162       172       182       192       202       212       222       232       242       252       262       272       282       292       302       312       322       332       342       352       362       372       382       392       402       412       422       432       442       452       462       472       482       492       502       512       522       532       542       552       562       572       582       592       602       612       622       632       642       652       662       672       682       692       702       712       722       732       742       752       762       772       782       792       802       812       822       832       842       852       862       872       882       892       902       912       922       932       942       952       962       972       982       992      1002      1012      1022      1032      1042      1052      1062
          XPO1_HUMAN     53 LKEHPDAWTRVDTILEFSQNMNTKYYGLQILENVIKTRWKILPRNQCEGIKKYVVGLIIKTSSDPTCVEKEKVYIGKLNMILVQILKQEWPKHWPTFISDIVGASRTSESLCQNNMVILKLLSEEVFDFSSGQITQVKSKHLKDSMCNEFSQIFQLCQFVMENSQNAPLVHATLETLLRFLNWIPLGYIFETKLISTLIYKFLNVPMFRNVSLKCLTEIAGVSVSQYEEQFVTLFTLTMMQLKQMLPLNTNIRLAYSNGKDDEQNFIQNLSLFLCTFLKEHDQLIEKRLNLRETLMEALHYMLLVSEVEETEIFKICLEYWNHLAAELYRESPFSTSASPLLSGSQHFDVPPRRQLYLPMLFKVRLLMVSRMAKPEEVLVVENDQGEVVREFMKDTDSINLYKNMRETLVYLTHLDYVDTERIMTEKLHNQVNGTEWSWKNLNTLCWAIGSISGAMHEEDEKRFLVTVIKDLLGLCEQKRGKDNKAIIASNIMYIVGQYPRFLRAHWKFLKTVVNKLFEFMHETHDGVQDMACDTFIKIAQKCRRHFVQVQVGEVMPFIDEILNNINTIICDLQPQQVHTFYEAVGYMIGAQTDQTVQEHLIEKYMLLPNQVWDSIIQQATKNVDILKDPETVKQLGSILKTNVRACKAVGHPFVIQLGRIYLDMLNVYKCLSENISAAIQANGEMVTKQPLIRSMRTVKRETLKLISGWVSRSNDPQMVAENFVPPLLDAVLIDYQRNVPAAREPEVLSTMAIIVNKLGGHITAEIPQIFDAVFECTLNMINKDFEEYPEHRTNFFLLLQAVNSHCFPAFLAIPPTQFKLVLDSIIWAFKHTMRNVADTGLQILFTLLQNVAQEEAAAQSFYQTYFCDILQHIFSVVTDTSHTAGLTMHASILAYMFNLVEEGKISTSLNPGNPVNNQIFLQEYVANLLKSAFPHLQDAQVKLFVTGLFSLNQDIPAFKEHLRDFLVQIKEFAGEDTSDLFLEEREIALRQADEEKHKRQMSVPGIFNP 1062
               SCOP domains d3gb8    a_ A: Exportin-1 (Xpo1, Crm1)                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             SCOP domains
               CATH domains ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------3gb8A02 A:704-1027 Leucine-rich Repeat Variant                                                                                                                                                                                                                                                                                      ----------------------------------- CATH domains
               Pfam domains -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author .....----hhhhhhhh.....hhhhhhhhhhhhhhhh.----hhhhhhhhhhhhhhhhhhh.-----..hhhhhhhhhhhhhhhhhhhh.....hhhhhhhhhhh.hhhhhhhhhhhhhhhhh...-------hhhhhhhhhhhhhhhhhhhhhhhhhhhhhh.hhhhhhhhhhhhhhhh...hhhhhhh.hhhhhhhhhh..hhhhhhhhhhhhhhhhhh....hhhhhhhhhhhhhhhhhhhh....hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh..hhhhhhhhhhhhhhhhh..hhhhhhhhhhhhhhhhhhhhhhh...--------------.hhhhhhhhhhhhhhhhhhhhhh.....-----------------hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh....hhhhhhhhhhhhhhh....hhhhhhhhhhhhhhhhhhhhhhh.hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh.....hhhhhhhhhhhhhhhhhhhhh.........hhhhhhhhhhhhhhh..hhhhhhhhhhhhhhhhhh..hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh..hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh.hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh....hhhhhhhhhhhhhhhhhhh.hhhhhhhhhhhhhhhhhhhhhhhh.hhhhhhhhhhhhhhhhhhhh.hhhhhhhhhhhhhhhhhhhhhhhhhh.....hhhhhhhhhhhhhhhhhh.............hhhhhhhhhhhhhhhhhh...hhhhhhhhhhhhhh...hhhhhhhhhhhhhhhhhh.....hhhhhhhhhhhhhhhhhhhhhhhhhhh...... Sec.struct. author
                 SAPs(SNPs) -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- PROSITE
                 Transcript -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Transcript
                3gb8 A   53 LKEHP----RVDTILEFSQNMNTKYYGLQILENVIKTRW----RNQCEGIKKYVVGLIIKTSS-----EKEKVYIGKLNMILVQILKQEWPKHWPTFISDIVGASRTSESLCQNNMVILKLLSEEVF-------TQVKSKHLKDSMCNEFSQIFQLCQFVMENSQNAPLVHATLETLLRFLNWIPLGYIFETKLISTLIYKFLNVPMFRNVSLKCLTEIAGVSVSQYEEQFVTLFTLTMMQLKQMLPLNTNIRLAYSNGKDDEQNFIQNLSLFLCTFLKEHDQLIEKRLNLRETLMEALHYMLLVSEVEETEIFKICLEYWNHLAAELYRESPFS--------------VPPRRQLYLPMLFKVRLLMVSRMAKPEE-----------------DTDSINLYKNMRETLVYLTHLDYVDTERIMTEKLHNQVNGTEWSWKNLNTLCWAIGSISGAMHEEDEKRFLVTVIKDLLGLCEQKRGKDNKAIIASNIMYIVGQYPRFLRAHWKFLKTVVNKLFEFMHETHDGVQDMACDTFIKIAQKCRRHFVQVQVGEVMPFIDEILNNINTIICDLQPQQVHTFYEAVGYMIGAQTDQTVQEHLIEKYMLLPNQVWDSIIQQATKNVDILKDPETVKQLGSILKTNVRACKAVGHPFVIQLGRIYLDMLNVYKCLSENISAAIQANGEMVTKQPLIRSMRTVKRETLKLISGWVSRSNDPQMVAENFVPPLLDAVLIDYQRNVPAAREPEVLSTMAIIVNKLGGHITAEIPQIFDAVFECTLNMINKDFEEYPEHRTNFFLLLQAVNSHCFPAFLAIPPTQFKLVLDSIIWAFKHTMRNVADTGLQILFTLLQNVAQEEAAAQSFYQTYFCDILQHIFSVVTDTSHTAGLTMHASILAYMFNLVEEGKISTSLNPGNPVNNQIFLQEYVANLLKSAFPHLQDAQVKLFVTGLFSLNQDIPAFKEHLRDFLVQIKEFAGEDTSDLFLEEREIALRQADEEKHKRQMSVPGIFNP 1062
                                |   62        72        82        |-   |   102       112  |    122       132       142       152       162       172      |  -    |  192       202       212       222       232       242       252       262       272       282       292       302       312       322       332       342       352       362       372       382    |    -       402       412       422      |  -         -    |  452       462       472       482       492       502       512       522       532       542       552       562       572       582       592       602       612       622       632       642       652       662       672       682       692       702       712       722       732       742       752       762       772       782       792       802       812       822       832       842       852       862       872       882       892       902       912       922       932       942       952       962       972       982       992      1002      1012      1022      1032      1042      1052      1062
                               57   62                           91   96                115   121                                                       179     187                                                                                                                                                                                                     387            402                        429               447                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       

Chain B from PDB  Type:PROTEIN  Length:268
 aligned with SPN1_HUMAN | O95149 from UniProtKB/Swiss-Prot  Length:360

    Alignment length:295
                             1                                                                                                                                                                                                                                                                                                     
                             |       9        19        29        39        49        59        69        79        89        99       109       119       129       139       149       159       169       179       189       199       209       219       229       239       249       259       269       279       289     
          SPN1_HUMAN      - -MEELSQALASSFSVSQDLNSTAAPHPRLSQYKSKYSSLEQSERRRRLLELQKSKRLDYVNHARRLAEDDWTGMESEEENKKDDEEMDIDTVKKLPKHYANQLMLSEWLIDVPSDLGQEWIVVVCPVGKRALIVASRGSTSAYTKSGYCVNRFSSLLPGGNRRNSTAKDYTILDCIYNEVNQTYYVLDVMCWRGHPFYDCQTDFRFYWMHSKLPEEEGLGEKTKLNPFKFVGLKNFPCTPESLCDVLSMDFPFEVDGLLFYHKQTHYSPGSTPLVGWLRPYMVSDVLGVAVPAGP  294
               SCOP domains -d3gb8b2 B:1-66 importin-beta binding (IBB) domain of snurportin-1 ---------------------------d3gb8b1 B:94-294 m3G-cap binding domain of snurportin-1                                                                                                                                                   SCOP domains
               CATH domains ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- CATH domains
               Pfam domains ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author hhhhhhhhhhhh.............hhhhh..........hhhhhhhhhhhhhh....hhhhhhhh.---------------------------.........eeeee......hhhhheeeeeee..eeeeeeee..eeeee.....eeeee.................eeeeeeee....eeeeeeeeee..ee....hhhhhhhhhhhhh...............eeee..eee.hhhhhhhhhhh.....eeeeeeee.......eeeeeeeeehhhhhhhhhh....... Sec.struct. author
                 SAPs(SNPs) ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE -----------IBB  PDB: B:11-66 UniProt: 11-73                               ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- PROSITE
           Transcript 1 (1) -Exon 1.3b  PDB: B:1-53 UniProt: 1-53                 ------------------------------------------------Exon 1.5  PDB: B:102-136           Exon 1.6  PDB: B:137-168        --------------------------------Exon 1.8  PDB: B:201-226  Exon 1.9  PDB: B:227-253   Exon 1.10  PDB: B:254-294 [INCOMPLETE]    Transcript 1 (1)
           Transcript 1 (2) -----------------------------------------------------Exon 1.4  PDB: B:53-101 (gaps) UniProt: 53-101   ------------------------------------------------------------------Exon 1.7  PDB: B:168-200         ---------------------------------------------------------------------------------------------- Transcript 1 (2)
                3gb8 B    0 SMEELSQALASSFSVSQDLNSTAAPHPRLSQYKSKYSSLEQSERRRRLLELQKSKRLDYVNHARRLA---------------------------LPKHYANQLMLSEWLIDVPSDLGQEWIVVVCPVGKRALIVASRGSTSAYTKSGYCVNRFSSLLPGGNRRNSTAKDYTILDCIYNEVNQTYYVLDVMCWRGHPFYDCQTDFRFYWMHSKLPEEEGLGEKTKLNPFKFVGLKNFPCTPESLCDVLSMDFPFEVDGLLFYHKQTHYSPGSTPLVGWLRPYMVSDVLGVAVPAGP  294
                                     9        19        29        39        49        59      |  -         -         -    |   99       109       119       129       139       149       159       169       179       189       199       209       219       229       239       249       259       269       279       289     
                                                                                             66                          94                                                                                                                                                                                                        

   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  (3, 3)

Asymmetric/Biological Unit

(-) CATH Domains  (1, 1)

Asymmetric/Biological Unit

(-) Pfam Domains  (0, 0)

(no "Pfam Domain" information available for 3GB8)

(-) Gene Ontology  (44, 50)

Asymmetric/Biological Unit(hide GO term definitions)
Chain A   (XPO1_HUMAN | O14980)
molecular function
    GO:0003723    RNA binding    Interacting selectively and non-covalently with an RNA molecule or a portion thereof.
    GO:0008536    Ran GTPase binding    Interacting selectively and non-covalently with Ran, a conserved Ras-like GTP-binding protein, implicated in nucleocytoplasmic transport, cell cycle progression, spindle assembly, nuclear organization and nuclear envelope (NE) assembly.
    GO:0005487    nucleocytoplasmic transporter activity    Enables the directed movement of substances between the nucleus and the cytoplasm of a cell.
    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:0019904    protein domain specific binding    Interacting selectively and non-covalently with a specific domain of a protein.
    GO:0008565    protein transporter activity    Enables the directed movement of proteins into, out of or within a cell, or between cells.
    GO:0005215    transporter activity    Enables the directed movement of substances (such as macromolecules, small molecules, ions) into, out of or within a cell, or between cells.
biological process
    GO:0006886    intracellular protein transport    The directed movement of proteins in a cell, including the movement of proteins between specific compartments or structures within a cell, such as organelles of a eukaryotic cell.
    GO:0075733    intracellular transport of virus    The directed movement of a virus, or part of a virus, within the host cell.
    GO:0051028    mRNA transport    The directed movement of mRNA, messenger ribonucleic acid, into, out of or within a cell, or between cells, by means of some agent such as a transporter or pore.
    GO:0000122    negative regulation of transcription from RNA polymerase II promoter    Any process that stops, prevents, or reduces the frequency, rate or extent of transcription from an RNA polymerase II promoter.
    GO:0006611    protein export from nucleus    The directed movement of a protein from the nucleus into the cytoplasm.
    GO:0034504    protein localization to nucleus    A process in which a protein transports or maintains the localization of another protein to the nucleus.
    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:0010824    regulation of centrosome duplication    Any process that modulates the frequency, rate or extent of centrosome duplication. Centrosome duplication is the replication of a centrosome, a structure comprised of a pair of centrioles and peri-centriolar material from which a microtubule spindle apparatus is organized.
    GO:0043488    regulation of mRNA stability    Any process that modulates the propensity of mRNA molecules to degradation. Includes processes that both stabilize and destabilize mRNAs.
    GO:0042176    regulation of protein catabolic process    Any process that modulates the frequency, rate or extent of the chemical reactions and pathways resulting in the breakdown of a protein by the destruction of the native, active configuration, with or without the hydrolysis of peptide bonds.
    GO:0046825    regulation of protein export from nucleus    Any process that modulates the frequency, rate or extent of the directed movement of proteins from the nucleus to the cytoplasm.
    GO:0042493    response to drug    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 drug stimulus. A drug is a substance used in the diagnosis, treatment or prevention of a disease.
    GO:0000055    ribosomal large subunit export from nucleus    The directed movement of a ribosomal large subunit from the nucleus into the cytoplasm.
    GO:0000056    ribosomal small subunit export from nucleus    The directed movement of a ribosomal small subunit from the nucleus into the cytoplasm.
    GO:0007062    sister chromatid cohesion    The cell cycle process in which the sister chromatids of a replicated chromosome become tethered to each 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.
    GO:0016032    viral process    A multi-organism process in which a virus is a participant. The other participant is the host. Includes infection of a host cell, replication of the viral genome, and assembly of progeny virus particles. In some cases the viral genetic material may integrate into the host genome and only subsequently, under particular circumstances, 'complete' its life cycle.
cellular component
    GO:0015030    Cajal body    A class of nuclear body, first seen after silver staining by Ramon y Cajal in 1903, enriched in small nuclear ribonucleoproteins, and certain general RNA polymerase II transcription factors; ultrastructurally, they appear as a tangle of coiled, electron-dense threads roughly 0.5 micrometers in diameter; involved in aspects of snRNP biogenesis; the protein coilin serves as a marker for Cajal bodies. Some argue that Cajal bodies are the sites for preassembly of transcriptosomes, unitary particles involved in transcription and processing of RNA.
    GO:0005642    annulate lamellae    Stacks of endoplasmic reticulum (ER) membranes containing a high density of nuclear pores, thought to form from excess nuclear membrane components, that have been described in a number of different cells. Annulate lamellar membranes are continuous with and embedded within the ER.
    GO:0005737    cytoplasm    All of the contents of a cell excluding the plasma membrane and nucleus, but including other subcellular structures.
    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: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:0030529    intracellular ribonucleoprotein complex    An intracellular macromolecular complex containing both protein and RNA molecules.
    GO:0000776    kinetochore    A multisubunit complex that is located at the centromeric region of DNA and provides an attachment point for the spindle microtubules.
    GO:0016020    membrane    A lipid bilayer along with all the proteins and protein complexes embedded in it an attached to it.
    GO:0005635    nuclear envelope    The double lipid bilayer enclosing the nucleus and separating its contents from the rest of the cytoplasm; includes the intermembrane space, a gap of width 20-40 nm (also called the perinuclear space).
    GO:0031965    nuclear membrane    Either of the lipid bilayers that surround the nucleus and form the nuclear envelope; excludes the intermembrane space.
    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:0005654    nucleoplasm    That part of the nuclear content other than the chromosomes or the nucleolus.
    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.

Chain B   (SPN1_HUMAN | O95149)
molecular function
    GO:0003723    RNA binding    Interacting selectively and non-covalently with an RNA molecule or a portion thereof.
    GO:0000339    RNA cap binding    Interacting selectively and non-covalently with a 7-methylguanosine (m7G) group or derivative located at the 5' end of an RNA molecule.
    GO:0008565    protein transporter activity    Enables the directed movement of proteins into, out of or within a cell, or between cells.
biological process
    GO:0051170    nuclear import    The directed movement of substances into the nucleus.
    GO:0006606    protein import into nucleus    The directed movement of a protein from the cytoplasm to the nucleus.
    GO:0061015    snRNA import into nucleus    The directed movement of snRNA, small nuclear ribonucleic acid into the nucleus.
    GO:0000387    spliceosomal snRNP assembly    The aggregation, arrangement and bonding together of one or more snRNA and multiple protein components to form a ribonucleoprotein complex that is involved in formation of the spliceosome.
    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:0005737    cytoplasm    All of the contents of a cell excluding the plasma membrane and nucleus, but including other subcellular structures.
    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: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:0005643    nuclear pore    Any of the numerous similar discrete openings in the nuclear envelope of a eukaryotic cell, where the inner and outer nuclear membranes are joined.
    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.

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 Related Entries

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

UniProtKB/Swiss-Prot
        SPN1_HUMAN | O951491xk5 2p8q 2q5d 2qna 3gjx 3lww 3nby 3nbz 3nc0 5dis
        XPO1_HUMAN | O149801w9c 2l1l 4bsm 4bsn 5dis

(-) Related Entries Specified in the PDB File

(no "Related Entries Specified in the PDB File" available for 3GB8)