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(-) Description

Title :  THE STRUCTURE OF EXONUCLEASE I SUGGESTS HOW PROCESSIVITY IS ACHIEVED
 
Authors :  W. A. Breyer, B. W. Matthews
Date :  27 Sep 00  (Deposition) - 06 Dec 00  (Release) - 13 Jul 11  (Revision)
Method :  X-RAY DIFFRACTION
Resolution :  2.40
Chains :  Asym./Biol. Unit :  A
Keywords :  Alpha-Beta Domain, Sh3-Like Domain, Dnaq Superfamily, Hydrolase (Keyword Search: [Gene Ontology, PubMed, Web (Google))
 
Reference :  W. A. Breyer, B. W. Matthews
Structure Of Escherichia Coli Exonuclease I Suggests How Processivity Is Achieved.
Nat. Struct. Biol. V. 7 1125 2000
PubMed-ID: 11101894  |  Reference-DOI: 10.1038/81978

(-) Compounds

Molecule 1 - EXONUCLEASE I
    ChainsA
    EC Number3.1.11.1
    EngineeredYES
    Expression SystemESCHERICHIA COLI
    Expression System PlasmidPET22B
    Expression System Taxid562
    Organism ScientificESCHERICHIA COLI
    Organism Taxid562
    SynonymEXODEOXYRIBONUCLEASE I

 Structural Features

(-) Chains, Units

  1
Asymmetric/Biological Unit A

Summary Information (see also Sequences/Alignments below)

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

Asymmetric/Biological Unit (3, 3)
No.NameCountTypeFull Name
1GOL1Ligand/IonGLYCEROL
2MG1Ligand/IonMAGNESIUM ION
3PO41Ligand/IonPHOSPHATE ION

(-) Sites  (3, 3)

Asymmetric Unit (3, 3)
No.NameEvidenceResiduesDescription
1AC1SOFTWAREASP A:15 , TYR A:102 , ASP A:108 , HOH A:627 , HOH A:640BINDING SITE FOR RESIDUE MG A 501
2AC2SOFTWAREASN A:255 , HIS A:302 , ASN A:304 , LYS A:305BINDING SITE FOR RESIDUE PO4 A 601
3AC3SOFTWARESER A:233 , LYS A:299 , HOH A:687BINDING SITE FOR RESIDUE GOL A 602

(-) SS Bonds  (0, 0)

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

(-) Cis Peptide Bonds  (0, 0)

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

 Sequence-Structure Mapping

(-) SAPs(SNPs)/Variants  (0, 0)

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

(-) PROSITE Motifs  (2, 2)

Asymmetric/Biological Unit (2, 2)
 PROSITEUniProtKBPDB
No.IDACDescriptionIDLocationCountLocation
1EXOI_SH3PS51784 Exonuclease I (ExoI) SH3-like domain profile.EX1_ECOLI202-355  1A:202-354
2EXOI_CPS51785 Exonuclease I (ExoI) C-terminal domain profile.EX1_ECOLI358-475  1A:359-475

(-) Exons   (0, 0)

(no "Exon" information available for 1FXX)

(-) 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:459
 aligned with EX1_ECOLI | P04995 from UniProtKB/Swiss-Prot  Length:475

    Alignment length:470
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             475  
                                    17        27        37        47        57        67        77        87        97       107       117       127       137       147       157       167       177       187       197       207       217       227       237       247       257       267       277       287       297       307       317       327       337       347       357       367       377       387       397       407       417       427       437       447       457       467       | -
            EX1_ECOLI     8 QSTFLFHDYETFGTHPALDRPAQFAAIRTDSEFNVIGEPEVFYCKPADDYLPQPGAVLITGITPQEARAKGENEAAFAARIHSLFTVPKTCILGYNNVRFDDEVTRNIFYRNFYDPYAWSWQHDNSRWDLLDVMRACYALRPEGINWPENDDGLPSFRLEHLTKANGIEHSNAHDAMADVYATIAMAKLVKTRQPRLFDYLFTHRNKHKLMALIDVPQMKPLVHVSGMFGAWRGNTSWVAPLAWHPENRNAVIMVDLAGDISPLLELDSDTLRERLYTAKTDLGDNAAVPVKLVHINKCPVLAQANTLRPEDADRLGINRQHCLDNLKILRENPQVREKVVAIFAEAEPFTPSDNVDAQLYNGFFSDADRAAMKIVLETEPRNLPALDITFVDKRIEKLLFNYRARNFPGTLDYAEQQRWLEHRRQVFTPEFLQGYADELQMLVQQYADDKEKVALLKALWQYAEEIV--   -
               SCOP domains d1fxxa_ A: Exonuclease I                                                                                                                                                                                                                                                                                                                                                                                                                                                               SCOP domains
               CATH domains 1fxxA01 A:8-201  [code=3.30.420.10, no name defined]                                                                                                                                              -----------------------------------------------------------------------------------------    ------------------------------------------------------------    ----------------------------------------------------------------------------------------------------------------------- CATH domains
               Pfam domains -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author ..eeeeeeeee.........eeeeeeeee..........eeee.........hhhhhhhhh.hhhhhhhhh.hhhhhhhhhhhhhh...eeeee.....hhhhhhhhhhhhh....hhhhh....eeeehhhhhhhhhhhh........---.....hhhhhhhh.........hhhhhhhhhhhhhhhhhhhhhhhhhhhhhh.hhhhhhhhh.......eeee.hhhhhhhh.eeeeeeeee......eeeeee....hhhhhhhhhhhhhhhhhhh....----...eeeee.....eeee.hhhhhhhhhhhh.hhhhhhhhhhhhhhhhhhhhhhhhhhh..----...hhhhhhhhh..hhhhhhhhhhhhhhhhhhh.........hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh..hhhhhhhhhhhhhhhhhhhh. Sec.struct. author
                 SAPs(SNPs) -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------EXOI_SH3  PDB: A:202-354 UniProt: 202-355                                                                                                                 --EXOI_C  PDB: A:359-475 UniProt: 358-475                                                                               -- PROSITE
                 Transcript -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Transcript
                 1fxx A   8 QSTFLFHDYETFGTHPALDRPAQFAAIRTDSEFNVIGEPEVFYCKPADDYLPQPGAVLITGITPQEARAKGENEAAFAARIHSLFTVPKTCILGYNNVRFDDEVTRNIFYRNFYDPYAWSWQHDNSRWDLLDVMRACYALRPEGINWPE---GLPSFRLEHLTKANGIEHSNAHDAMADVYATIAMAKLVKTRQPRLFDYLFTHRNKHKLMALIDVPQMKPLVHVSGMFGAWRGNTSWVAPLAWHPENRNAVIMVDLAGDISPLLELDSDTLRERLYTAKTDL----AVPVKLVHINKCPVLAQANTLRPEDADRLGINRQHCLDNLKILRENPQVREKVVAIFAEA----PSDNVDAQLYNGFFSDADRAAMKIVLETEPRNLPALDITFVDKRIEKLLFNYRARNFPGTLDYAEQQRWLEHRRQVFTPEFLQGYADELQMLVQQYADDKEKVALLKALWQYADEIVEH 477
                                    17        27        37        47        57        67        77        87        97       107       117       127       137       147        |-  |    167       177       187       197       207       217       227       237       247       257       267       277       287  |    297       307       317       327       337       347      |  - |     367       377       387       397       407       417       427       437       447       457       467       477
                                                                                                                                                                              156 160                                                                                                                               290  295                                                        354  359                                                                                                                      

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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)

Asymmetric/Biological Unit

(-) CATH Domains  (1, 1)

Asymmetric/Biological Unit
(-)
Class: Alpha Beta (26913)

(-) Pfam Domains  (0, 0)

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

(-) Gene Ontology  (19, 19)

Asymmetric/Biological Unit(hide GO term definitions)
Chain A   (EX1_ECOLI | P04995)
molecular function
    GO:0000175    3'-5'-exoribonuclease activity    Catalysis of the sequential cleavage of mononucleotides from a free 3' terminus of an RNA molecule.
    GO:0051575    5'-deoxyribose-5-phosphate lyase activity    Catalysis of the beta-elimination of the 5' deoxyribose-5-phosphate at an abasic site in DNA where a DNA-(apurinic or apyrimidinic site) lyase has already cleaved the C-O-P bond 3' to the apurinic or apyrimidinic site.
    GO:0003677    DNA binding    Any molecular function by which a gene product interacts selectively and non-covalently with DNA (deoxyribonucleic acid).
    GO:0008852    exodeoxyribonuclease I activity    Catalysis of the degradation of single-stranded DNA. It acts progressively in a 3' to 5' direction, releasing 5'-phosphomononucleotides.
    GO:0004529    exodeoxyribonuclease activity    Catalysis of the sequential cleavage of mononucleotides from a free 5' or 3' terminus of a DNA molecule.
    GO:0004527    exonuclease activity    Catalysis of the hydrolysis of ester linkages within nucleic acids by removing nucleotide residues from the 3' or 5' end.
    GO:0016787    hydrolase activity    Catalysis of the hydrolysis of various bonds, e.g. C-O, C-N, C-C, phosphoric anhydride bonds, etc. Hydrolase is the systematic name for any enzyme of EC class 3.
    GO:0000287    magnesium ion binding    Interacting selectively and non-covalently with magnesium (Mg) ions.
    GO:0046872    metal ion binding    Interacting selectively and non-covalently with any metal ion.
    GO:0004518    nuclease activity    Catalysis of the hydrolysis of ester linkages within nucleic acids.
    GO:0003676    nucleic acid binding    Interacting selectively and non-covalently with any nucleic acid.
    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:0008310    single-stranded DNA 3'-5' exodeoxyribonuclease activity    Catalysis of the sequential cleavage of mononucleotides from a free 3' terminus of a single-stranded DNA molecule.
    GO:0003697    single-stranded DNA binding    Interacting selectively and non-covalently with single-stranded DNA.
biological process
    GO:0006308    DNA catabolic process    The cellular DNA metabolic process resulting in the breakdown of DNA, deoxyribonucleic acid, one of the two main types of nucleic acid, consisting of a long unbranched macromolecule formed from one or two strands of linked deoxyribonucleotides, the 3'-phosphate group of each constituent deoxyribonucleotide being joined in 3',5'-phosphodiester linkage to the 5'-hydroxyl group of the deoxyribose moiety of the next one.
    GO:0000738    DNA catabolic process, exonucleolytic    The chemical reactions and pathways resulting in the breakdown of DNA, involving the hydrolysis of terminal 3',5'-phosphodiester bonds in one or two strands of deoxyribonucleotides.
    GO:0006281    DNA repair    The process of restoring DNA after damage. Genomes are subject to damage by chemical and physical agents in the environment (e.g. UV and ionizing radiations, chemical mutagens, fungal and bacterial toxins, etc.) and by free radicals or alkylating agents endogenously generated in metabolism. DNA is also damaged because of errors during its replication. A variety of different DNA repair pathways have been reported that include direct reversal, base excision repair, nucleotide excision repair, photoreactivation, bypass, double-strand break repair pathway, and mismatch repair pathway.
    GO:0090503    RNA phosphodiester bond hydrolysis, exonucleolytic    The chemical reactions and pathways involving the hydrolysis of terminal 3',5'-phosphodiester bonds in one or two strands of ribonucleotides.
    GO:0006974    cellular response to DNA damage stimulus    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 indicating damage to its DNA from environmental insults or errors during metabolism.

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 Related Entries

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

UniProtKB/Swiss-Prot
        EX1_ECOLI | P049952qxf 3c94 3c95 3hl8 3hp9 4hcb 4hcc 4jrp 4jrq 4js4 4js5

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