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(-) Description

Title :  OUTER MEMBRANE COBALAMIN TRANSPORTER (BTUB) FROM E. COLI, WITH BOUND CALCIUM AND CYANOCOBALAMIN (VITAMIN B12) SUBSTRATE
 
Authors :  D. P. Chimento, A. K. Mohanty, R. J. Kadner, M. C. Wiener
Date :  21 Jan 03  (Deposition) - 29 Apr 03  (Release) - 13 Jul 11  (Revision)
Method :  X-RAY DIFFRACTION
Resolution :  3.10
Chains :  Asym./Biol. Unit :  A
Keywords :  Beta Barrel, Cobalamin, Vitamin B12, Membrane Transport, Calcium Binding, Transport Protein (Keyword Search: [Gene Ontology, PubMed, Web (Google)] )
 
Reference :  D. P. Chimento, A. K. Mohanty, R. J. Kadner, M. C. Wiener
Substrate-Induced Transmembrane Signaling In The Cobalamin Transporter Btub
Nat. Struct. Biol. V. 10 394 2003
PubMed-ID: 12652322  |  Reference-DOI: 10.1038/NSB914
(for further references see the PDB file header)

(-) Compounds

Molecule 1 - VITAMIN B12 RECEPTOR
    Chains: A
    Engineered: YES
    Expression System: ESCHERICHIA COLI
    Expression System Plasmid: PET22B
    Expression System Strain: BL21(DE3)PLYSS
    Expression System Taxid: 562
    Expression System Vector Type: PLASMID
    Gene: BTUB
    Organism Scientific: ESCHERICHIA COLI
    Organism Taxid: 562
    Synonym: OUTER MEMBRANE COBALAMIN TRANSPORTER

 Structural Features

(-) Chains, Units

  1
Asymmetric/Biological Unit : A

Summary Information (see also Sequences/Alignments below)

(-) Ligands, Modified Residues, Ions  (3, 11)

Asymmetric/Biological Unit (3, 11)
No.NameCountTypeFull Name
1C8E6Ligand/Ion(HYDROXYETHYLOXY)TRI(ETHYLOXY)OCTANE
2CA4Ligand/IonCALCIUM ION
3CNC1Ligand/IonCO-CYANOCOBALAMIN

(-) Sites  (11, 11)

Asymmetric Unit (11, 11)
No.NameEvidenceResiduesDescription
01AC1SOFTWAREASP A:179 , GLN A:191 , ASP A:193 , ASP A:195 , ASP A:230BINDING SITE FOR RESIDUE CA A 595
02AC2SOFTWAREASP A:193 , ASP A:195 , TYR A:229 , ASP A:230 , ASP A:241BINDING SITE FOR RESIDUE CA A 596
03AC3SOFTWAREGLU A:378 , GLU A:381BINDING SITE FOR RESIDUE CA A 597
04AC4SOFTWAREASP A:411BINDING SITE FOR RESIDUE CA A 598
05AC5SOFTWAREASN A:57 , GLN A:62 , LEU A:63 , SER A:65 , ASN A:72 , ALA A:88 , GLY A:89 , VAL A:90 , SER A:91 , ASN A:185 , TYR A:229 , ALA A:231 , ASN A:276 , THR A:289 , ARG A:497 , TYR A:531 , TYR A:579BINDING SITE FOR RESIDUE CNC A 701
06AC6SOFTWAREARG A:358 , SER A:359 , ARG A:367 , GLY A:369 , THR A:370 , PHE A:470 , ASP A:471 , THR A:472 , GLY A:473 , C8E A:802 , C8E A:805BINDING SITE FOR RESIDUE C8E A 800
07AC7SOFTWARETRP A:317 , THR A:338 , ASP A:361 , SER A:363 , TYR A:383 , PHE A:422 , TRP A:431BINDING SITE FOR RESIDUE C8E A 801
08AC8SOFTWAREILE A:261 , ASN A:302 , VAL A:304 , ALA A:313 , GLY A:314 , LEU A:342 , ILE A:433 , ALA A:466 , TYR A:481 , C8E A:800 , C8E A:804BINDING SITE FOR RESIDUE C8E A 802
09AC9SOFTWAREILE A:311 , LEU A:342 , GLY A:344 , LEU A:345 , GLN A:346 , PHE A:353 , GLY A:355 , ALA A:356 , THR A:373BINDING SITE FOR RESIDUE C8E A 803
10BC1SOFTWARETRP A:214 , ILE A:261 , SER A:263 , TYR A:436 , LYS A:462 , GLY A:463 , VAL A:464 , C8E A:802BINDING SITE FOR RESIDUE C8E A 804
11BC2SOFTWARETRP A:371 , TYR A:505 , C8E A:800BINDING SITE FOR RESIDUE C8E A 805

(-) SS Bonds  (0, 0)

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

(-) Cis Peptide Bonds  (6, 6)

Asymmetric/Biological Unit
No.Residues
1Gly A:236 -Ser A:237
2Asp A:278 -Pro A:279
3Arg A:283 -Tyr A:284
4Asp A:285 -Ser A:286
5Ser A:286 -Ser A:287
6Tyr A:534 -Pro A:535

 Sequence-Structure Mapping

(-) SAPs(SNPs)/Variants  (0, 0)

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

(-) PROSITE Motifs  (1, 1)

Asymmetric/Biological Unit (1, 1)
 PROSITEUniProtKBPDB
No.IDACDescriptionIDLocationCountLocation
1TONB_DEPENDENT_REC_2PS01156 TonB-dependent receptor proteins signature 2.BTUB_ECOLI597-614  1A:577-594

(-) Exons   (0, 0)

(no "Exon" information available for 1NQH)

(-) 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:584
 aligned with BTUB_ECOLI | P06129 from UniProtKB/Swiss-Prot  Length:614

    Alignment length:589
                                    35        45        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       455       465       475       485       495       505       515       525       535       545       555       565       575       585       595       605         
           BTUB_ECOLI    26 DTLVVTANRFEQPRSTVLAPTTVVTRQDIDRWQSTSVNDVLRRLPGVDITQNGGSGQLSSIFIRGTNASHVLVLIDGVRLNLAGVSGSADLSQFPIALVQRVEYIRGPRSAVYGSDAIGGVVNIITTRDEPGTEISAGWGSNSYQNYDVSTQQQLGDKTRVTLLGDYAHTHGYDVVAYGNTGTQAQTDNDGFLSKTLYGALEHNFTDAWSGFVRGYGYDNRTNYDAYYSPGSPLLDTRKLYSQSWDAGLRYNGELIKSQLITSYSHSKDYNYDPHYGRYDSSATLDEMKQYTVQWANNVIVGHGSIGAGVDWQKQTTTPGTGYVEDGYDQRNTGIYLTGLQQVGDFTFEGAARSDDNSQFGRHGTWQTSAGWEFIEGYRFIASYGTSYKAPNLGQLYGFYGNPNLDPEKSKQWEGAFEGLTAGVNWRISGYRNDVSDLIDYDDHTLKYYNEGKARIKGVEATANFDTGPLTHTVSYDYVDARNAITDTPLLRRAKQQVKYQLDWQLYDFDWGITYQYLGTRYDKDYSSYPYQTVKMGGVSLWDLAVAYPVTSHLTVRGKIANLFDKDYETVYGYQTAGREYTLSGSYTF 614
               SCOP domains d1nqha_ A: Outer membrane cobalamin transporter BtuB                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          SCOP domains
               CATH domains -1nqhA01 A:7-130 Ferric Hydroxamate Uptake Protein; Chain A, domain 1                                                        1nqhA02 A:131-594  [code=2.40.170.20, no name defined]                                                                                                                                                                                                                                                                                                                                                                                                                           CATH domains
               Pfam domains ------------Plug-1nqhA02 A:18-126                                                                                        ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------TonB_dep_Rec-1nqhA01 A:370-593                                                                                                                                                                                                  - Pfam domains
         Sec.struct. author ............hhhhh...eeeeehhhhhhhh..hhhhhhh......eee.......eee.hhhh.....eeee..ee...............hhhhh.eeeeee..hhhhhh.....eeeeee......eeeeeeeee...eeeeeeeeeee....eeeeeeeeeeee.....................eeeeeeeeeeeee....eeeeeeeeeeeeeee.............eeeeeeeeeeeeeeee...eeeeeeeeeeeeeeeee...........eeeeeeeeeeeeeeeee...eeeeeeeeeeeeeee.-----....eeeeeeeeeeeeeee..eeeeeeeeeeee...eeeeeeeeeeeeeee..eeeeeeeeeeee..hhhhhhh.........eeeeeeeeeeeeee..eeeeeeeeeeeeeeeeee.hhhh.eeeeeeeeeeeeeeeeeee...eeeeeeeeeeeeee............eeeeeeeeee....eeeeeeeee...eee........eee...eeeeeeeeeee....eeeeeeee..................eeeeeeeee. Sec.struct. author
                 SAPs(SNPs) ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------TONB_DEPENDENT_REC PROSITE
                 Transcript ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Transcript
                 1nqh A   6 DTLVVTANRFEQPRSTVLAPTTVVTRQDIDRWQSTSVNDVLRRLPGVDITQNGGSGQLSSIFIRGTNASHVLVLIDGVRLNLAGVSGSADLSQFPIALVQRVEYIRGPRSAVYGSDAIGGVVNIITTRDEPGTEISAGWGSNSYQNYDVSTQQQLGDKTRVTLLGDYAHTHGYDVVAYGNTGTQAQTDNDGFLSKTLYGALEHNFTDAWSGFVRGYGYDNRTNYDAYYSPGSPLLDTRKLYSQSWDAGLRYNGELIKSQLITSYSHSKDYNYDPHYGRYDSSATLDEMKQYTVQWANNVIVGHGSIGAGVDWQKQTTTP-----EDGYDQRNTGIYLTGLQQVGDFTFEGAARSDDNSQFGRHGTWQTSAGWEFIEGYRFIASYGTSYKAPNLGQLYGFYGNPNLDPEKSKQWEGAFEGLTAGVNWRISGYRNDVSDLIDYDDHTLKYYNEGKARIKGVEATANFDTGPLTHTVSYDYVDARNAITDTPLLRRAKQQVKYQLDWQLYDFDWGITYQYLGTRYDKDYSSYPYQTVKMGGVSLWDLAVAYPVTSHLTVRGKIANLFDKDYETVYGYQTAGREYTLSGSYTF 594
                                    15        25        35        45        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        |-    |  335       345       355       365       375       385       395       405       415       425       435       445       455       465       475       485       495       505       515       525       535       545       555       565       575       585         
                                                                                                                                                                                                                                                                                                                                                        324   330
   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, 1)

Asymmetric/Biological Unit
(-)
Class: Membrane and cell surface proteins and peptides (2046)

(-) CATH Domains  (2, 2)

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

(-) Pfam Domains  (2, 2)

Asymmetric/Biological Unit
(-)
Clan: MBB (97)
(-)
Clan: Ubiquitin (279)

(-) Gene Ontology  (12, 12)

Asymmetric/Biological Unit(hide GO term definitions)
Chain A   (BTUB_ECOLI | P06129)
molecular function
    GO:0015235    cobalamin transporter activity    Enables the directed movement of cobalamin (vitamin B12), a water-soluble vitamin characterized by possession of a corrin nucleus containing a cobalt atom, into, out of or within a cell.
    GO:0046872    metal ion binding    Interacting selectively and non-covalently with any metal ion.
    GO:0015288    porin activity    Catalysis of the transfer of substances, sized less than 1000 Da, from one side of the membrane to the other. The transmembrane portions of porins consist exclusively of beta-strands which form a beta-barrel. They are found in the outer membranes of Gram-negative bacteria, mitochondria, plastids and possibly acid-fast Gram-positive bacteria.
    GO:0004872    receptor activity    Combining with an extracellular or intracellular messenger to initiate a change in cell activity.
biological process
    GO:0015889    cobalamin transport    The directed movement of cobalamin (vitamin B12), a water-soluble vitamin characterized by possession of a corrin nucleus containing a cobalt atom, into, out of or within a cell, or between cells, 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:0055085    transmembrane transport    The process in which a solute is transported across a lipid bilayer, from one side of a membrane to the 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.
cellular component
    GO:0009279    cell outer membrane    A lipid bilayer that forms the outermost membrane of the cell envelope; enriched in polysaccharide and protein; the outer leaflet of the membrane contains specific lipopolysaccharide structures.
    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:0046930    pore complex    Any small opening in a membrane that allows the passage of gases and/or liquids.

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 Related Entries

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

UniProtKB/Swiss-Prot
        BTUB_ECOLI | P06129: 1nqe 1nqf 1nqg 1ujw 2gsk 2guf 2ysu 3m8b 3m8d 3rgm 3rgn

(-) Related Entries Specified in the PDB File

1nqe OUTER MEMBRANE COBALAMIN TRANSPORTER (BTUB) FROM E. COLI
1nqf OUTER MEMBRANE COBALAMIN TRANSPORTER (BTUB) FROM E. COLI, METHIONINE SUBSTIUTION CONSTRUCT FOR SE-MET SAD PHASING
1nqg OUTER MEMBRANE COBALAMIN TRANSPORTER (BTUB) FROM E. COLI, WITH BOUND CALCIUM