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(-) Description

Title :  STRUCTURE OF THE REDUCED FORM OF MERP, THE PERIPLASMIC PROTEIN FROM THE BACTERIAL MERCURY DETOXIFICATION SYSTEM, NMR, 20 STRUCTURES
 
Authors :  R. A. Steele, S. J. Opella
Date :  07 Mar 97  (Deposition) - 23 Jul 97  (Release) - 24 Feb 09  (Revision)
Method :  SOLUTION NMR
Resolution :  NOT APPLICABLE
Chains :  NMR Structure  :  A  (20x)
Keywords :  Mercury Detoxification, Periplasmic, Heavy Metal Transport, Alpha-Beta Sandwich (Keyword Search: [Gene Ontology, PubMed, Web (Google)] )
 
Reference :  R. A. Steele, S. J. Opella
Structures Of The Reduced And Mercury-Bound Forms Of Merp, The Periplasmic Protein From The Bacterial Mercury Detoxification System.
Biochemistry V. 36 6885 1997
PubMed-ID: 9188683  |  Reference-DOI: 10.1021/BI9631632
(for further references see the PDB file header)

(-) Compounds

Molecule 1 - MERP
    Cellular Location: PERIPLASM
    Chains: A
    Engineered: YES
    Expression System: ESCHERICHIA COLI BL21
    Expression System Gene: MERP
    Expression System Plasmid: PSSS
    Expression System Strain: BL21
    Expression System Taxid: 511693
    Expression System Vector Type: MALTOSE BINDING PROTEIN
    Gene: MERP
    Organism Scientific: SHIGELLA FLEXNERI
    Organism Taxid: 623
    Other Details: THE PROTEIN STUDIED EXCLUDES THE PRECURSOR SIGNAL SEQUENCE. THIS IS THE NATIVE FORM OF THE PROTEIN AFTER CELL PROCESSING.
    Other Details - Source: MER GENES LOCATED ON TRANSPOSON TN21
    Synonym: MERCURIC TRANSPORT PROTEIN

 Structural Features

(-) Chains, Units

  
NMR Structure (20x): 

Summary Information (see also Sequences/Alignments below)

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

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

(-) Sites  (1, 1)

NMR Structure (1, 1)
No.NameEvidenceResiduesDescription
1HMAUNKNOWNCYS A:14 , CYS A:17MERCURY BINDING CYS RESIDUES ARE CONTAINED IN THE GMTCAAC HEAVY METAL BINDING REGION (HMA).

(-) SS Bonds  (0, 0)

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

(-) Cis Peptide Bonds  (0, 0)

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

 Sequence-Structure Mapping

(-) SAPs(SNPs)/Variants  (0, 0)

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

(-) PROSITE Motifs  (2, 2)

NMR Structure (2, 2)
 PROSITEUniProtKBPDB
No.IDACDescriptionIDLocationCountLocation
1HMA_2PS50846 Heavy-metal-associated domain profile.MERP_SHIFL23-89  1A:4-70
2HMA_1PS01047 Heavy-metal-associated domain.MERP_SHIFL28-57  1A:9-38

(-) Exons   (0, 0)

(no "Exon" information available for 1AFI)

(-) Sequences/Alignments

NMR Structure
   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:72
 aligned with MERP_SHIFL | P04129 from UniProtKB/Swiss-Prot  Length:91

    Alignment length:72
                                    29        39        49        59        69        79        89  
            MERP_SHIFL   20 ATQTVTLAVPGMTCAACPITVKKALSKVEGVSKVDVGFEKREAVVTFDDTKASVQKLTKATADAGYPSSVKQ 91
               SCOP domains d1afia_ A: Mercuric ion binding protein MerP                             SCOP domains
               CATH domains 1afiA00 A:1-72  [code=3.30.70.100, no name defined]                      CATH domains
               Pfam domains ------------------------------------------------------------------------ Pfam domains
         Sec.struct. author ..eeeeeee.......hhhhhhhhhhh...eeeeeee....eeeeee......hhhhhhhhhhh....ee.. Sec.struct. author
                 SAPs(SNPs) ------------------------------------------------------------------------ SAPs(SNPs)
                PROSITE (1) ---HMA_2  PDB: A:4-70 UniProt: 23-89                                  -- PROSITE (1)
                PROSITE (2) --------HMA_1  PDB: A:9-38            ---------------------------------- PROSITE (2)
                 Transcript ------------------------------------------------------------------------ Transcript
                  1afi A  1 ATQTVTLAVPGMTCAACPITVKKALSKVEGVSKVDVGFEKREAVVTFDDTKASVQKLTKATADAGYPSSVKQ 72
                                    10        20        30        40        50        60        70
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  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)

NMR Structure
(-)
Class: Alpha and beta proteins (a+b) (23004)

(-) CATH Domains  (1, 1)

NMR Structure
(-)
Class: Alpha Beta (26913)

(-) Pfam Domains  (0, 0)

(no "Pfam Domain" information available for 1AFI)

(-) Gene Ontology  (8, 8)

NMR Structure(hide GO term definitions)
Chain A   (MERP_SHIFL | P04129)
molecular function
    GO:0045340    mercury ion binding    Interacting selectively and non-covalently with mercury (Hg) ions.
    GO:0015097    mercury ion transmembrane transporter activity    Enables the transfer of mercury (Hg) ions from one side of a membrane to the other.
    GO:0046872    metal ion binding    Interacting selectively and non-covalently with any metal ion.
biological process
    GO:0015694    mercury ion transport    The directed movement of mercury (Hg) ions into, out of or within a cell, or between cells, by means of some agent such as a transporter or pore.
    GO:0030001    metal ion transport    The directed movement of metal ions, any metal ion with an electric charge, into, out of or within a cell, or between cells, by means of some agent such as a transporter or pore.
    GO:0046689    response to mercury ion    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 mercury ion stimulus.
    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:0042597    periplasmic space    The region between the inner (cytoplasmic) and outer membrane (Gram-negative Bacteria) or cytoplasmic membrane and cell wall (Fungi and Gram-positive Bacteria).

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  1afi
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 Related Entries

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

UniProtKB/Swiss-Prot
        MERP_SHIFL | P04129: 1afj 1dvw 2hqi

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