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(-) Description

Title :  EXONUCLEASE I (APO)
 
Authors :  J. L. Keck, D. Lu
Date :  15 Feb 08  (Deposition) - 08 Jul 08  (Release) - 21 Mar 12  (Revision)
Method :  X-RAY DIFFRACTION
Resolution :  1.70
Chains :  Asym./Biol. Unit :  A
Keywords :  Exonuclease, Ssb, Genome Maintenance, Dna Damage, Dna Repair, Hydrolase (Keyword Search: [Gene Ontology, PubMed, Web (Google))
 
Reference :  D. Lu, J. L. Keck
Structural Basis Of Escherichia Coli Single-Stranded Dna-Binding Protein Stimulation Of Exonuclease I.
Proc. Natl. Acad. Sci. Usa V. 105 9169 2008
PubMed-ID: 18591666  |  Reference-DOI: 10.1073/PNAS.0800741105

(-) Compounds

Molecule 1 - EXODEOXYRIBONUCLEASE I
    ChainsA
    EC Number3.1.11.1
    EngineeredYES
    Expression SystemESCHERICHIA COLI
    Expression System PlasmidPET
    Expression System StrainBL21 (DE3)
    Expression System Taxid562
    Expression System Vector TypePLASMID
    GeneSBCB, CPEA, XONA
    Organism ScientificESCHERICHIA COLI
    Organism Taxid562
    StrainK12
    SynonymEXONUCLEASE I, DNA DEOXYRIBOPHOSPHODIESTERASE, DRPASE

 Structural Features

(-) Chains, Units

  1
Asymmetric/Biological Unit A

Summary Information (see also Sequences/Alignments below)

(-) Ligands, Modified Residues, Ions  (1, 1)

Asymmetric/Biological Unit (1, 1)
No.NameCountTypeFull Name
1MG1Ligand/IonMAGNESIUM ION

(-) Sites  (1, 1)

Asymmetric Unit (1, 1)
No.NameEvidenceResiduesDescription
1AC1SOFTWAREASP A:15 , HOH A:490 , HOH A:496 , HOH A:497 , HOH A:512 , HOH A:545BINDING SITE FOR RESIDUE MG A 483

(-) SS Bonds  (0, 0)

(no "SS Bond" information available for 3C95)

(-) Cis Peptide Bonds  (0, 0)

(no "Cis Peptide Bond" information available for 3C95)

 Sequence-Structure Mapping

(-) SAPs(SNPs)/Variants  (0, 0)

(no "SAP(SNP)/Variant" information available for 3C95)

(-) 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:202-353
2EXOI_CPS51785 Exonuclease I (ExoI) C-terminal domain profile.EX1_ECOLI358-475  1A:360-475

(-) Exons   (0, 0)

(no "Exon" information available for 3C95)

(-) 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:446
 aligned with EX1_ECOLI | P04995 from UniProtKB/Swiss-Prot  Length:475

    Alignment length:470
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              475 
                                    16        26        36        46        56        66        76        86        96       106       116       126       136       146       156       166       176       186       196       206       216       226       236       246       256       266       276       286       296       306       316       326       336       346       356       366       376       386       396       406       416       426       436       446       456       466        |-
            EX1_ECOLI     7 QQSTFLFHDYETFGTHPALDRPAQFAAIRTDSEFNVIGEPEVFYCKPADDYLPQPGAVLITGITPQEARAKGENEAAFAARIHSLFTVPKTCILGYNNVRFDDEVTRNIFYRNFYDPYAWSWQHDNSRWDLLDVMRACYALRPEGINWPENDDGLPSFRLEHLTKANGIEHSNAHDAMADVYATIAMAKLVKTRQPRLFDYLFTHRNKHKLMALIDVPQMKPLVHVSGMFGAWRGNTSWVAPLAWHPENRNAVIMVDLAGDISPLLELDSDTLRERLYTAKTDLGDNAAVPVKLVHINKCPVLAQANTLRPEDADRLGINRQHCLDNLKILRENPQVREKVVAIFAEAEPFTPSDNVDAQLYNGFFSDADRAAMKIVLETEPRNLPALDITFVDKRIEKLLFNYRARNFPGTLDYAEQQRWLEHRRQVFTPEFLQGYADELQMLVQQYADDKEKVALLKALWQYAEEIV-   -
               SCOP domains d3c95a_ A: automated matches                                                                                                                                                                                                                                                                                                                                                                                                                                                           SCOP domains
               CATH domains 3c95A01 A:7-201  [code=3.30.420.10, no name defined]                                                                                                                                               -------------------------------------------------------------------------------              -----------------------------------------------------------      --------------------------------------------------------------------------------------------------------------------- CATH domains
               Pfam domains -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author ...eeeeeeeee.........eeeeeeeeee.........eeeee........hhhhhhhhh.hhhhhhhheehhhhhhhhhhhhhh...eeeee.....hhhhhhhhhhhhh....hhhhhhhhheeeehhhhhhhhhhhh................hhhhhhhhh....----..hhhhhhhhhhhhhhhhhhhhhhhhhhhh.hhhhhhh.........eeee.hhhhhhhh.eeeeeeeee......eeeeee....hhhhhhhhhhhhh--------------...eeeee.....eeee.hhhhhhhhhhhh.hhhhhhhhhhhhhhhhhhhhhhhhhhh.------..hhhhhhhhh..hhhhhhhhhhhhhhhhhhhhhh......hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh..hhhhhhhhhhhhhhhhhhh. Sec.struct. author
                 SAPs(SNPs) -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------EXOI_SH3  PDB: A:202-353 UniProt: 202-355                                                                                                                 --EXOI_C  PDB: A:360-475 UniProt: 358-475                                                                               - PROSITE
                 Transcript -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Transcript
                 3c95 A   7 QQSTFLFHDYETFGTHPALDRPAQFAAIRTDSEFNVIGEPEVFYCKPADDYLPQPGAVLITGITPQEARAKGENEAAFAARIHSLFTVPKTCILGYNNVRFDDEVTRNIFYRNFYDPYAWSWQHDNSRWDLLDVMRACYALRPEGINWPENDDGLPSFRLEHLTKANGIEH----DAMADVYATIAMAKLVKTRQPRLFDYLFTHRNKHKLMALIDVPQMKPLVHVSGMFGAWRGNTSWVAPLAWHPENRNAVIMVDLAGDISPLLELDSDTLR--------------AVPVKLVHINKCPVLAQANTLRPEDADRLGINRQHCLDNLKILRENPQVREKVVAIFAE------SDNVDAQLYNGFFSDADRAAMKIVLETEPRNLPALDITFVDKRIEKLLFNYRARNFPGTLDYAEQQRWLEHRRQVFTPEFLQGYADELQMLVQQYADDKEKVALLKALWQYADEIVE 476
                                    16        26        36        46        56        66        76        86        96       106       116       126       136       146       156       166       176|    | 186       196       206       216       226       236       246       256       266       276   |     -       296       306       316       326       336       346      |  -   |   366       376       386       396       406       416       426       436       446       456       466       476
                                                                                                                                                                                                    177  182                                                                                               280            295                                                       353    360                                                                                                                    

   Legend:   → Mismatch (orange background)
  - → Gap (green background, '-', border residues have a numbering label)
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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 3C95)

(-) 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 | P049951fxx 2qxf 3c94 3hl8 3hp9 4hcb 4hcc 4jrp 4jrq 4js4 4js5

(-) Related Entries Specified in the PDB File

1fxx APO EXONUCLESE I
2c94 SSB-CT/EXONUCLEASE I COMPLEX