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(-) Description

Title :  THE STRUCTURE OF THE MAMMALIAN SRP RECEPTOR
 
Authors :  O. Schlenker, K. Wild, I. Sinning
Date :  23 Dec 05  (Deposition) - 31 Jan 06  (Release) - 24 Feb 09  (Revision)
Method :  X-RAY DIFFRACTION
Resolution :  2.45
Chains :  Asym. Unit :  A,B
Biol. Unit 1:  A,B  (1x)
Biol. Unit 2:  A,B  (4x)
Biol. Unit 3:  A,B  (2x)
Keywords :  Endomembrane Targeting, Gtpase, Gap, Longin Domain, Sedl, Signal Recognition Particle Receptor, X-Ray Structure, Transport Protein (Keyword Search: [Gene Ontology, PubMed, Web (Google))
 
Reference :  O. Schlenker, A. Hendricks, I. Sinning, K. Wild
The Structure Of The Mammalian Signal Recognition Particle (Srp) Receptor As Prototype For The Interaction Of Small Gtpases With Longin Domains.
J. Biol. Chem. V. 281 8898 2006
PubMed-ID: 16439358  |  Reference-DOI: 10.1074/JBC.M512415200
(for further references see the PDB file header)

(-) Compounds

Molecule 1 - SIGNAL RECOGNITION PARTICLE RECEPTOR ALPHA SUBUNIT
    ChainsA
    EngineeredYES
    Expression SystemESCHERICHIA COLI BL21(DE3)
    Expression System PlasmidPET16B
    Expression System StrainBL21(DE3)
    Expression System Taxid469008
    Expression System Vector TypePLASMID
    FragmentRESIDUES 1-129
    GeneSRPR
    Organism CommonHUMAN
    Organism ScientificHOMO SAPIENS
    Organism Taxid9606
    SynonymSR-ALPHA, DOCKING PROTEIN ALPHA, DP-ALPHA
 
Molecule 2 - SIGNAL RECOGNITION PARTICLE RECEPTOR BETA SUBUNIT
    ChainsB
    EngineeredYES
    Expression SystemESCHERICHIA COLI BL21(DE3)
    Expression System PlasmidPET16B
    Expression System StrainBL21(DE3)
    Expression System Taxid469008
    Expression System Vector TypePLASMID
    FragmentRESIDUES 63-269
    GeneSRPRB
    Organism CommonHOUSE MOUSE
    Organism ScientificMUS MUSCULUS
    Organism Taxid10090
    SynonymSR-BETA

 Structural Features

(-) Chains, Units

  12
Asymmetric Unit AB
Biological Unit 1 (1x)AB
Biological Unit 2 (4x)AB
Biological Unit 3 (2x)AB

Summary Information (see also Sequences/Alignments below)

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

Asymmetric Unit (2, 2)
No.NameCountTypeFull Name
1GTP1Ligand/IonGUANOSINE-5'-TRIPHOSPHATE
2MG1Ligand/IonMAGNESIUM ION
Biological Unit 1 (1, 1)
No.NameCountTypeFull Name
1GTP1Ligand/IonGUANOSINE-5'-TRIPHOSPHATE
2MG-1Ligand/IonMAGNESIUM ION
Biological Unit 2 (1, 4)
No.NameCountTypeFull Name
1GTP4Ligand/IonGUANOSINE-5'-TRIPHOSPHATE
2MG-1Ligand/IonMAGNESIUM ION
Biological Unit 3 (1, 2)
No.NameCountTypeFull Name
1GTP2Ligand/IonGUANOSINE-5'-TRIPHOSPHATE
2MG-1Ligand/IonMAGNESIUM ION

(-) Sites  (2, 2)

Asymmetric Unit (2, 2)
No.NameEvidenceResiduesDescription
1AC1SOFTWARETHR B:76 , SER B:93 , GTP B:301 , HOH B:357 , HOH B:358BINDING SITE FOR RESIDUE MG B 270
2AC2SOFTWARECYS B:71 , ASP B:72 , SER B:73 , GLY B:74 , LYS B:75 , THR B:76 , LEU B:77 , THR B:90 , THR B:92 , SER B:93 , GLY B:118 , ASN B:178 , LYS B:179 , ASP B:181 , ILE B:182 , SER B:245 , ALA B:246 , LYS B:247 , MG B:270 , HOH B:302 , HOH B:303 , HOH B:317 , HOH B:357 , HOH B:358BINDING SITE FOR RESIDUE GTP B 301

(-) SS Bonds  (1, 1)

Asymmetric Unit
No.Residues
1A:17 -A:25

(-) Cis Peptide Bonds  (0, 0)

(no "Cis Peptide Bond" information available for 2FH5)

 Sequence-Structure Mapping

(-) SAPs(SNPs)/Variants  (0, 0)

(no "SAP(SNP)/Variant" information available for 2FH5)

(-) PROSITE Motifs  (0, 0)

(no "PROSITE Motif" information available for 2FH5)

(-) Exons   (4, 4)

Asymmetric Unit (4, 4)
 ENSEMBLUniProtKBPDB
No.Transcript IDExonExon IDGenome LocationLengthIDLocationLengthCountLocationLength
1.2bENST000003321182bENSE00002174793chr11:126138854-126138583272SRPRA_HUMAN1-39391A:1-3939
1.3ENST000003321183ENSE00001465013chr11:126137981-12613789884SRPRA_HUMAN40-67281A:40-67 (gaps)28
1.4bENST000003321184bENSE00001299168chr11:126137607-126137444164SRPRA_HUMAN68-122551A:68-12255
1.4dENST000003321184dENSE00001506987chr11:126137230-126137070161SRPRA_HUMAN122-176551A:122-1298
1.5ENST000003321185ENSE00001465010chr11:126136817-126136658160SRPRA_HUMAN176-229540--
1.6ENST000003321186ENSE00001465009chr11:126136524-126136371154SRPRA_HUMAN229-280520--
1.7bENST000003321187bENSE00001465008chr11:126136173-12613608292SRPRA_HUMAN281-311310--
1.8ENST000003321188ENSE00001465007chr11:126135976-126135858119SRPRA_HUMAN311-351410--
1.9ENST000003321189ENSE00001465006chr11:126135718-12613563287SRPRA_HUMAN351-380300--
1.10bENST0000033211810bENSE00001465005chr11:126135335-126135163173SRPRA_HUMAN380-437580--
1.11cENST0000033211811cENSE00001465004chr11:126135067-126134854214SRPRA_HUMAN438-509720--
1.12bENST0000033211812bENSE00001465002chr11:126134434-126134271164SRPRA_HUMAN509-563550--
1.13aENST0000033211813aENSE00001465001chr11:126134184-12613408699SRPRA_HUMAN564-596330--
1.13dENST0000033211813dENSE00001465000chr11:126133939-1261328331107SRPRA_HUMAN597-638420--

(-) 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:124
 aligned with SRPRA_HUMAN | P08240 from UniProtKB/Swiss-Prot  Length:638

    Alignment length:131
                              1                                                                                                                                
                              |      8        18        28        38        48        58        68        78        88        98       108       118       128 
          SRPRA_HUMAN     - --MLDFFTIFSKGGLVLWCFQGVSDSCTGPVNALIRSVLLQERGGNNSFTHEALTLKYKLDNQFELVFVVGFQKILTLTYVDKLIDDVHRLFRDKYRTEIQQQSALSLLNGTFDFQNDFLRLLREAEESSK 129
               SCOP domains --d2fh5a1 A:1-129 Signal recognition parti       cle receptor alpha subunit, N-terminal domain                                      SCOP domains
               CATH domains ----------------------------------------------------------------------------------------------------------------------------------- CATH domains
               Pfam domains ----------------------------------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author .....eeeeee....eeeee........hhhhhhhhhhhhhh-------.....eeeeeee....eeeeeee.hhhhhhhhhhhhhhhhhhhhhhhhhhhhh..hhhhhh....hhhhhhhhhhhhhhhh. Sec.struct. author
                 SAPs(SNPs) ----------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE ----------------------------------------------------------------------------------------------------------------------------------- PROSITE
           Transcript 1 (1) --Exon 1.2b  PDB: A:1-39 UniProt: 1-39   Exon 1.3  PDB: A:40-67 (gapsExon 1.4b  PDB: A:68-122 UniProt: 68-122               ------- Transcript 1 (1)
           Transcript 1 (2) ---------------------------------------------------------------------------------------------------------------------------1.4d     Transcript 1 (2)
                 2fh5 A  0A HSMVDFFTIFSKGGLVLWCFQGVSDSCTGPVNALIRSVLLQE-------THEALTLKYKLDNQFELVFVVGFQKILTLTYVDKLIDDVHRLFRDKYRTEIQQQSALSLLNGTFDFQNDFLRLLREAEESSK 129
                            ||       8        18        28        38 |      48        58        68        78        88        98       108       118       128 
                            ||                                      40      48                                                                                 
                           0A|                                                                                                                                 
                            0B                                                                                                                                 

Chain B from PDB  Type:PROTEIN  Length:188
 aligned with SRPRB_MOUSE | P47758 from UniProtKB/Swiss-Prot  Length:269

    Alignment length:207
                                    72        82        92       102       112       122       132       142       152       162       172       182       192       202       212       222       232       242       252       262       
          SRPRB_MOUSE    63 RAVLFVGLCDSGKTLLFVRLLTGQYRDTQTSITDSSAIYKVNNNRGNSLTLIDLPGHESLRFQLLDRFKSSARAVVFVVDSAAFQREVKDVAEFLYQVLIDSMALKNSPSLLIACNKQDIAMAKSAKLIQQQLEKELNTLRVTRSAAPSTLDSSSTAPAQLGKKGKEFEFSQLPLKVEFLECSAKGGRGDTGSADIQDLEKWLAKIA 269
               SCOP domains d2fh5b1 B:63-269 Signal recognition particle receptor beta-subunit                                                                                                                                              SCOP domains
               CATH domains --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- CATH domains
               Pfam domains --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author .eeeee.....hhhhhhhhhhhh...........eeeeee.......eeeeee...hhhhhhhhhhhhh..eeeeeeeee..hhhhhhhhhhhhhhhhhhhhhh.....eeeeeee........hhhhhhhhhhhhhhhhhhhh.------------...........hhhhh...eeeee....-------...hhhhhhhhhhhh Sec.struct. author
                 SAPs(SNPs) --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- PROSITE
                 Transcript --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Transcript
                 2fh5 B  63 RAVLFVGLCDSGKTLLFVRLLTGQYRDTQTSITDSSAIYKVNNNRGNSLTLIDLPGHESLRFQLLDRFKSSARAVVFVVDSAAFQREVKDVAEFLYQVLIDSMALKNSPSLLIACNKQDIAMAKSAKLIQQQLEKELNTLRVTRS------------PAQLGKKGKEFEFSQLPLKVEFLECSAK-------SADIQDLEKWLAKIA 269
                                    72        82        92       102       112       122       132       142       152       162       172       182       192       202    |    -       222       232       242    |    -  |    262       
                                                                                                                                                                          207          220                        247     255              

   Legend:   → Mismatch (orange background)
  - → Gap (green background, '-', border residues have a numbering label)
    → Modified Residue (blue background, lower-case, 'x' indicates undefined single-letter code, labelled with number + name)
  x → Chemical Group (purple background, 'x', labelled with number + name, e.g. ACE or NH2)
  extra numbering lines below/above indicate numbering irregularities and modified residue names etc., number ends below/above '|'

 Classification and Annotation

(-) SCOP Domains  (2, 2)

Asymmetric Unit

(-) CATH Domains  (0, 0)

(no "CATH Domain" information available for 2FH5)

(-) Pfam Domains  (0, 0)

(no "Pfam Domain" information available for 2FH5)

(-) Gene Ontology  (19, 25)

Asymmetric Unit(hide GO term definitions)
Chain A   (SRPRA_HUMAN | P08240)
molecular function
    GO:0005525    GTP binding    Interacting selectively and non-covalently with GTP, guanosine triphosphate.
    GO:0003924    GTPase activity    Catalysis of the reaction: GTP + H2O = GDP + phosphate.
    GO:0000166    nucleotide binding    Interacting selectively and non-covalently with a nucleotide, any compound consisting of a nucleoside that is esterified with (ortho)phosphate or an oligophosphate at any hydroxyl group on the ribose or deoxyribose.
    GO:0005047    signal recognition particle binding    Interacting selectively and non-covalently with the signal recognition particle.
biological process
    GO:0036498    IRE1-mediated unfolded protein response    A series of molecular signals mediated by the endoplasmic reticulum stress sensor IRE1 (Inositol-requiring transmembrane kinase/endonuclease). Begins with activation of IRE1 in response to endoplasmic reticulum (ER) stress, and ends with regulation of a downstream cellular process, e.g. transcription. One target of activated IRE1 is the transcription factor HAC1 in yeast, or XBP1 in mammals; IRE1 cleaves an intron of a mRNA coding for HAC1/XBP1 to generate an activated HAC1/XBP1 transcription factor, which controls the up regulation of UPR-related genes. At least in mammals, IRE1 can also signal through additional intracellular pathways including JNK and NF-kappaB.
    GO:0006614    SRP-dependent cotranslational protein targeting to membrane    The targeting of proteins to a membrane that occurs during translation and is dependent upon two key components, the signal-recognition particle (SRP) and the SRP receptor. SRP is a cytosolic particle that transiently binds to the endoplasmic reticulum (ER) signal sequence in a nascent protein, to the large ribosomal unit, and to the SRP receptor in the ER membrane.
    GO:0006613    cotranslational protein targeting to membrane    The targeting of proteins to a membrane that occurs during translation. The transport of most secretory proteins, particularly those with more than 100 amino acids, into the endoplasmic reticulum lumen occurs in this manner, as does the import of some proteins into mitochondria.
    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: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:0005783    endoplasmic reticulum    The irregular network of unit membranes, visible only by electron microscopy, that occurs in the cytoplasm of many eukaryotic cells. The membranes form a complex meshwork of tubular channels, which are often expanded into slitlike cavities called cisternae. The ER takes two forms, rough (or granular), with ribosomes adhering to the outer surface, and smooth (with no ribosomes attached).
    GO:0005789    endoplasmic reticulum membrane    The lipid bilayer surrounding the endoplasmic reticulum.
    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: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:0016020    membrane    A lipid bilayer along with all the proteins and protein complexes embedded in it an attached to it.
    GO:0005785    signal recognition particle receptor complex    A transmembrane heterodimeric protein located in the membrane of the rough endoplasmic reticulum. Both subunits contain GTPase domains with which signal recognition particle interacts. In the presence of GTP and SRP receptor, SRP is released from the ribosome-nascent chain complex.

Chain B   (SRPRB_MOUSE | P47758)
molecular function
    GO:0005525    GTP binding    Interacting selectively and non-covalently with GTP, guanosine triphosphate.
    GO:0000166    nucleotide binding    Interacting selectively and non-covalently with a nucleotide, any compound consisting of a nucleoside that is esterified with (ortho)phosphate or an oligophosphate at any hydroxyl group on the ribose or deoxyribose.
biological process
    GO:0007264    small GTPase mediated signal transduction    Any series of molecular signals in which a small monomeric GTPase relays one or more of the signals.
cellular component
    GO:0005737    cytoplasm    All of the contents of a cell excluding the plasma membrane and nucleus, but including other subcellular structures.
    GO:0005881    cytoplasmic microtubule    Any microtubule in the cytoplasm of a cell.
    GO:0005783    endoplasmic reticulum    The irregular network of unit membranes, visible only by electron microscopy, that occurs in the cytoplasm of many eukaryotic cells. The membranes form a complex meshwork of tubular channels, which are often expanded into slitlike cavities called cisternae. The ER takes two forms, rough (or granular), with ribosomes adhering to the outer surface, and smooth (with no ribosomes attached).
    GO:0005789    endoplasmic reticulum membrane    The lipid bilayer surrounding the endoplasmic reticulum.
    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:0005622    intracellular    The living contents of a cell; the matter contained within (but not including) the plasma membrane, usually taken to exclude large vacuoles and masses of secretory or ingested material. In eukaryotes it includes the nucleus and cytoplasm.
    GO:0016020    membrane    A lipid bilayer along with all the proteins and protein complexes embedded in it an attached to it.

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 Related Entries

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

UniProtKB/Swiss-Prot
        SRPRA_HUMAN | P082402go5 5l3q
        SRPRB_MOUSE | P477582go5

(-) Related Entries Specified in the PDB File

(no "Related Entries Specified in the PDB File" available for 2FH5)