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(-) Description

Title :  DISTINCT METAL ENVIRONMENT IN IRON-SUBSTITUTED MANGANESE SUPEROXIDE DISMUTASE PROVIDES A STRUCTURAL BASIS OF METAL SPECIFICITY
 
Authors :  R. A. Edwards, M. M. Whittaker, J. W. Whittaker, G. B. Jameson, E. N. Baker
Date :  26 Aug 98  (Deposition) - 02 Sep 98  (Release) - 24 Feb 09  (Revision)
Method :  X-RAY DIFFRACTION
Resolution :  2.20
Chains :  Asym./Biol. Unit :  A,B
Keywords :  Iron-Substituted Manganese Superoxide Dismutase, Oxidoreductase (Keyword Search: [Gene Ontology, PubMed, Web (Google))
 
Reference :  R. A. Edwards, M. M. Whittaker, J. W. Whittaker, G. B. Jameson, E. N. Baker
Distinct Metal Environment In Fe-Substituted Manganese Superoxide Dismutase Provides A Structural Basis Of Metal Specificity
J. Am. Chem. Soc. V. 120 9684 1998
PubMed: search
(for further references see the PDB file header)

(-) Compounds

Molecule 1 - PROTEIN (IRON-SUBSTITUTED MANGANESE SUPEROXIDE DISMUTASE)
    ChainsA, B
    EC Number1.15.1.1
    Organism ScientificESCHERICHIA COLI
    Organism Taxid562
    StrainAB2463/PDT1-5
    SynonymFE-MNSOD, FE-MNSD

 Structural Features

(-) Chains, Units

  12
Asymmetric/Biological Unit AB

Summary Information (see also Sequences/Alignments below)

(-) Ligands, Modified Residues, Ions  (2, 5)

Asymmetric/Biological Unit (2, 5)
No.NameCountTypeFull Name
1FE2Ligand/IonFE (III) ION
2OH3Ligand/IonHYDROXIDE ION

(-) Sites  (7, 7)

Asymmetric Unit (7, 7)
No.NameEvidenceResiduesDescription
1AC1SOFTWAREHIS A:81 , GLN A:146 , ASP A:167 , TRP A:169 , HIS A:171 , FE A:206BINDING SITE FOR RESIDUE OH A 207
2AC2SOFTWARETYR B:34 , HIS B:81 , GLN B:146 , ASP B:167 , TRP B:169 , HIS B:171 , FE B:206 , OH B:208BINDING SITE FOR RESIDUE OH B 207
3AC3SOFTWAREHIS B:26 , HIS B:30 , TYR B:34 , HIS B:81 , HIS B:171 , FE B:206 , OH B:207BINDING SITE FOR RESIDUE OH B 208
4AC4SOFTWAREHIS A:26 , HIS A:81 , ASP A:167 , HIS A:171 , OH A:207BINDING SITE FOR RESIDUE FE A 206
5AC5SOFTWAREHIS B:26 , HIS B:81 , ASP B:167 , HIS B:171 , OH B:207 , OH B:208BINDING SITE FOR RESIDUE FE B 206
6FE1AUTHORFE A:206 , HIS A:26 , HIS A:81 , ASP A:167 , HIS A:171 , OH A:207IRON-SUBSTITUTED ACTIVE SITE CHAIN A. CONTAINS ONE EXOGENOUS LIGAND MODELLED AS HYDROXIDE.
7FE2AUTHORFE B:206 , HIS B:26 , HIS B:81 , ASP B:167 , HIS B:171 , OH B:207 , OH B:208IRON-SUBSTITUTED ACTIVE SITE CHAIN B. CONTAINS TWO EXOGENOUS LIGANDS BOTH MODELLED AS HYDROXIDES.

(-) SS Bonds  (0, 0)

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

(-) Cis Peptide Bonds  (2, 2)

Asymmetric/Biological Unit
No.Residues
1Glu A:15 -Pro A:16
2Glu B:15 -Pro B:16

 Sequence-Structure Mapping

(-) SAPs(SNPs)/Variants  (1, 2)

Asymmetric/Biological Unit (1, 2)
  dbSNPPDB
No.SourceVariant IDVariantUniProt IDStatusIDChainVariant
1UniProtVAR_SODM_ECOLI_001 *M165LSODM_ECOLI  ---  ---A/BM164L
   * ID not provided by source

  SNP/SAP Summary Statistics (UniProtKB/Swiss-Prot)

(-) PROSITE Motifs  (1, 2)

Asymmetric/Biological Unit (1, 2)
 PROSITEUniProtKBPDB
No.IDACDescriptionIDLocationCountLocation
1SOD_MNPS00088 Manganese and iron superoxide dismutases signature.SODM_ECOLI168-175
 
  2A:167-174
B:167-174

(-) Exons   (0, 0)

(no "Exon" information available for 1MMM)

(-) 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:205
 aligned with SODM_ECOLI | P00448 from UniProtKB/Swiss-Prot  Length:206

    Alignment length:205
                                    11        21        31        41        51        61        71        81        91       101       111       121       131       141       151       161       171       181       191       201     
           SODM_ECOLI     2 SYTLPSLPYAYDALEPHFDKQTMEIHHTKHHQTYVNNANAALESLPEFANLPVEELITKLDQLPADKKTVLRNNAGGHANHSLFWKGLKKGTTLQGDLKAAIERDFGSVDNFKAEFEKAAASRFGSGWAWLVLKGDKLAVVSTANQDSPLMGEAISGASGFPIMGLDVWEHAYYLKFQNRRPDYIKEFWNVVNWDEAAARFAAKK 206
               SCOP domains d1mmma1 A:1-90 Mn superoxide dismutase (MnSOD)                                            d1mmma2 A:91-205 Mn superoxide dismutase (MnSOD)                                                                    SCOP domains
               CATH domains ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- CATH domains
               Pfam domains ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author ...................hhhhhhhhh.hhhhhhhhhhhhh...hhhhh..hhhhhh.hhh..hhhhhhhhhhhhhhhhhhhhhh.........hhhhhhhhhhh..hhhhhhhhhhhhhh....eeeeeeee..eeeeeeee....hhh.hhhh....eeeeeee..hhh.hhhh...hhhhhhhhhhh..hhhhhhhhhh.. Sec.struct. author
                 SAPs(SNPs) -------------------------------------------------------------------------------------------------------------------------------------------------------------------L----------------------------------------- SAPs(SNPs)
                    PROSITE ----------------------------------------------------------------------------------------------------------------------------------------------------------------------SOD_MN  ------------------------------- PROSITE
                 Transcript ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Transcript
                 1mmm A   1 SYTLPSLPYAYDALEPHFDKQTMEIHHTKHHQTYVNNANAALESLPEFANLPVEELITKLDQLPADKKTVLRNNAGGHANHSLFWKGLKKGTTLQGDLKAAIERDFGSVDNFKAEFEKAAASRFGSGWAWLVLKGDKLAVVSTANQDSPLMGEAISGASGFPIMGLDVWEHAYYLKFQNRRPDYIKEFWNVVNWDEAAARFAAKK 205
                                    10        20        30        40        50        60        70        80        90       100       110       120       130       140       150       160       170       180       190       200     

Chain B from PDB  Type:PROTEIN  Length:205
 aligned with SODM_ECOLI | P00448 from UniProtKB/Swiss-Prot  Length:206

    Alignment length:205
                                    11        21        31        41        51        61        71        81        91       101       111       121       131       141       151       161       171       181       191       201     
           SODM_ECOLI     2 SYTLPSLPYAYDALEPHFDKQTMEIHHTKHHQTYVNNANAALESLPEFANLPVEELITKLDQLPADKKTVLRNNAGGHANHSLFWKGLKKGTTLQGDLKAAIERDFGSVDNFKAEFEKAAASRFGSGWAWLVLKGDKLAVVSTANQDSPLMGEAISGASGFPIMGLDVWEHAYYLKFQNRRPDYIKEFWNVVNWDEAAARFAAKK 206
               SCOP domains d1mmmb1 B:1-90 Mn superoxide dismutase (MnSOD)                                            d1mmmb2 B:91-205 Mn superoxide dismutase (MnSOD)                                                                    SCOP domains
               CATH domains ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- CATH domains
           Pfam domains (1) Sod_Fe_N-1mmmB03 B:1-89                                                                  --Sod_Fe_C-1mmmB01 B:92-201                                                                                     ---- Pfam domains (1)
           Pfam domains (2) Sod_Fe_N-1mmmB04 B:1-89                                                                  --Sod_Fe_C-1mmmB02 B:92-201                                                                                     ---- Pfam domains (2)
         Sec.struct. author ...................hhhhhhhhh.hhhhhhhhhhhhhhh.hhhh...hhhhhh.hhh..hhhhhhhhhhhhhhhhhhhhhh.........hhhhhhhhhhh..hhhhhhhhhhhhhh....eeeeeeee..eeeeeeee....hhh.hhhh....eeeeeee..hhh.hhhh...hhhhhhhhhhh..hhhhhhhhhh.. Sec.struct. author
                 SAPs(SNPs) -------------------------------------------------------------------------------------------------------------------------------------------------------------------L----------------------------------------- SAPs(SNPs)
                    PROSITE ----------------------------------------------------------------------------------------------------------------------------------------------------------------------SOD_MN  ------------------------------- PROSITE
                 Transcript ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Transcript
                 1mmm B   1 SYTLPSLPYAYDALEPHFDKQTMEIHHTKHHQTYVNNANAALESLPEFANLPVEELITKLDQLPADKKTVLRNNAGGHANHSLFWKGLKKGTTLQGDLKAAIERDFGSVDNFKAEFEKAAASRFGSGWAWLVLKGDKLAVVSTANQDSPLMGEAISGASGFPIMGLDVWEHAYYLKFQNRRPDYIKEFWNVVNWDEAAARFAAKK 205
                                    10        20        30        40        50        60        70        80        90       100       110       120       130       140       150       160       170       180       190       200     

   Legend:   → Mismatch (orange background)
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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  (2, 4)

Asymmetric/Biological Unit

(-) CATH Domains  (0, 0)

(no "CATH Domain" information available for 1MMM)

(-) Pfam Domains  (2, 4)

Asymmetric/Biological Unit

(-) Gene Ontology  (15, 15)

Asymmetric/Biological Unit(hide GO term definitions)
Chain A,B   (SODM_ECOLI | P00448)
molecular function
    GO:0003677    DNA binding    Any molecular function by which a gene product interacts selectively and non-covalently with DNA (deoxyribonucleic acid).
    GO:0016209    antioxidant activity    Inhibition of the reactions brought about by dioxygen (O2) or peroxides. Usually the antioxidant is effective because it can itself be more easily oxidized than the substance protected. The term is often applied to components that can trap free radicals, thereby breaking the chain reaction that normally leads to extensive biological damage.
    GO:0030145    manganese ion binding    Interacting selectively and non-covalently with manganese (Mn) ions.
    GO:0046872    metal ion binding    Interacting selectively and non-covalently with any metal ion.
    GO:0016491    oxidoreductase activity    Catalysis of an oxidation-reduction (redox) reaction, a reversible chemical reaction in which the oxidation state of an atom or atoms within a molecule is altered. One substrate acts as a hydrogen or electron donor and becomes oxidized, while the other acts as hydrogen or electron acceptor and becomes reduced.
    GO:0004784    superoxide dismutase activity    Catalysis of the reaction: 2 superoxide + 2 H+ = O2 + hydrogen peroxide.
biological process
    GO:0071291    cellular response to selenium ion    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 stimulus from selenium ion.
    GO:0055114    oxidation-reduction process    A metabolic process that results in the removal or addition of one or more electrons to or from a substance, with or without the concomitant removal or addition of a proton or protons.
    GO:0019430    removal of superoxide radicals    Any process, acting at the cellular level, involved in removing superoxide radicals (O2-) from a cell or organism, e.g. by conversion to dioxygen (O2) and hydrogen peroxide (H2O2).
    GO:0010447    response to acidic pH    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 pH stimulus with pH < 7. pH is a measure of the acidity or basicity of an aqueous solution.
    GO:0009408    response to heat    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 heat stimulus, a temperature stimulus above the optimal temperature for that organism.
    GO:0006979    response to oxidative stress    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 oxidative stress, a state often resulting from exposure to high levels of reactive oxygen species, e.g. superoxide anions, hydrogen peroxide (H2O2), and hydroxyl radicals.
    GO:0006801    superoxide metabolic process    The chemical reactions and pathways involving superoxide, the superoxide anion O2- (superoxide free radical), or any compound containing this species.
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.

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 Related Entries

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

UniProtKB/Swiss-Prot
        SODM_ECOLI | P004481d5n 1en4 1en5 1en6 1i08 1i0h 1ix9 1ixb 1vew 1zlz 3k9s 3ot7

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