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(-) Description

Title :  CRYSTAL STRUCTURE OF HUMAN EXONUCLEASE 1 EXO1 (WT) IN COMPLEX WITH DNA (COMPLEX II)
 
Authors :  J. Orans, E. A. Mcsweeney, R. R. Iyer, M. A. Hast, H. W. Hellinga, P. Modri L. S. Beese
Date :  20 Jan 11  (Deposition) - 20 Apr 11  (Release) - 04 May 11  (Revision)
Method :  X-RAY DIFFRACTION
Resolution :  3.10
Chains :  Asym./Biol. Unit :  A,B,Z
Keywords :  Exonuclease, Hydrolase-Dna Complex (Keyword Search: [Gene Ontology, PubMed, Web (Google))
 
Reference :  J. Orans, E. A. Mcsweeney, R. R. Iyer, M. A. Hast, H. W. Hellinga, P. Modrich, L. S. Beese
Structures Of Human Exonuclease 1 Dna Complexes Suggest A Unified Mechanism For Nuclease Family.
Cell(Cambridge, Mass. ) V. 145 212 2011
PubMed-ID: 21496642  |  Reference-DOI: 10.1016/J.CELL.2011.03.005

(-) Compounds

Molecule 1 - EXONUCLEASE 1
    ChainsZ
    EC Number3.1.-.-
    EngineeredYES
    Expression SystemESCHERICHIA COLI
    Expression System Taxid562
    GeneEXO1, EXOI, HEX1
    Organism CommonHUMAN
    Organism ScientificHOMO SAPIENS
    Organism Taxid9606
    SynonymHEXO1, EXONUCLEASE I, HEXOI
 
Molecule 2 - DNA (5'-D(P*CP*GP*CP*TP*AP*GP*TP*CP*GP*AP*CP*AP*T)-3')
    ChainsA
    EngineeredYES
    SyntheticYES
 
Molecule 3 - DNA (5'-D(P*TP*CP*GP*AP*CP*TP*AP*GP*CP*G)-3')
    ChainsB
    EngineeredYES
    SyntheticYES

 Structural Features

(-) Chains, Units

  123
Asymmetric/Biological Unit ABZ

Summary Information (see also Sequences/Alignments below)

(-) Ligands, Modified Residues, Ions  (1, 4)

Asymmetric/Biological Unit (1, 4)
No.NameCountTypeFull Name
1BA4Ligand/IonBARIUM ION

(-) Sites  (4, 4)

Asymmetric Unit (4, 4)
No.NameEvidenceResiduesDescription
1AC1SOFTWAREASP Z:152 , ASP Z:171 , ASP Z:173BINDING SITE FOR RESIDUE BA Z 353
2AC2SOFTWAREASP Z:30 , ASP Z:152BINDING SITE FOR RESIDUE BA Z 354
3AC3SOFTWAREDT A:14 , SER Z:222 , SER Z:229 , ILE Z:233BINDING SITE FOR RESIDUE BA Z 355
4AC4SOFTWAREARG Z:243BINDING SITE FOR RESIDUE BA Z 356

(-) SS Bonds  (0, 0)

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

(-) Cis Peptide Bonds  (0, 0)

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

 Sequence-Structure Mapping

(-) SAPs(SNPs)/Variants  (8, 8)

Asymmetric/Biological Unit (8, 8)
  dbSNPPDB
No.SourceVariant IDVariantUniProt IDStatusIDChainVariant
1UniProtVAR_024966V27AEXO1_HUMANPolymorphism  ---ZV27A
2UniProtVAR_024967V76IEXO1_HUMANPolymorphism4149864ZV76I
3UniProtVAR_024968R93GEXO1_HUMANPolymorphism4149865ZR93G
4UniProtVAR_024969E109KEXO1_HUMANPolymorphism143546023ZE109K
5UniProtVAR_024970A137SEXO1_HUMANPolymorphism147663824ZA137S
6UniProtVAR_077352A153VEXO1_HUMANPolymorphism  ---ZA153V
7UniProtVAR_024971N279SEXO1_HUMANPolymorphism4149909ZN279S
8UniProtVAR_024972N299SEXO1_HUMANPolymorphism4149910ZN299S

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

(-) PROSITE Motifs  (2, 2)

Asymmetric/Biological Unit (2, 2)
 PROSITEUniProtKBPDB
No.IDACDescriptionIDLocationCountLocation
1XPG_1PS00841 XPG protein signature 1.EXO1_HUMAN71-85  1Z:71-85
2XPG_2PS00842 XPG protein signature 2.EXO1_HUMAN141-155  1Z:141-155

(-) Exons   (0, 0)

(no "Exon" information available for 3QEA)

(-) 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:DNA  Length:12
                                            
                 3qea A  11 CGCTAGTCGACA  22
                                    20  

Chain B from PDB  Type:DNA  Length:10
                                          
                 3qea B   1 TCGACTAGCG  10
                                    10

Chain Z from PDB  Type:PROTEIN  Length:345
 aligned with EXO1_HUMAN | Q9UQ84 from UniProtKB/Swiss-Prot  Length:846

    Alignment length:345
                                    11        21        31        41        51        61        71        81        91       101       111       121       131       141       151       161       171       181       191       201       211       221       231       241       251       261       271       281       291       301       311       321       331       341     
           EXO1_HUMAN     2 GIQGLLQFIKEASEPIHVRKYKGQVVAVDTYCWLHKGAIACAEKLAKGEPTDRYVGFCMKFVNMLLSHGIKPILVFDGCTLPSKKEVERSRRERRQANLLKGKQLLREGKVSEARECFTRSINITHAMAHKVIKAARSQGVDCLVAPYEADAQLAYLNKAGIVQAIITEDSDLLAFGCKKVILKMDQFGNGLEIDQARLGMCRQLGDVFTEEKFRYMCILSGCDYLSSLRGIGLAKACKVLRLANNPDIVKVIKKIGHYLKMNITVPEDYINGFIRANNTFLYQLVFDPIKRKLIPLNAYEDDVDPETLSYAGQYVDDSIALQIALGNKDINTFEQIDDYNPDTA 346
               SCOP domains --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- SCOP domains
               CATH domains --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- CATH domains
               Pfam domains XPG_N-3qeaZ02 Z:2-99                                                                              --------------------------------------XPG_I-3qeaZ01 Z:138-225                                                                 ------------------------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author ...hhhhhh...eeeee.hhhh..eeeeehhhhhhhhhhhhhhhhhh....hhhhhhhhhhhhhhhhh..eeeeee.......hhhhhhhhhhhhhhhhhhhhhhh......hhhhhhhhhh..hhhhhhhhhhhhhh...eeee...hhhhhhhhhhhh....eee..hhhhhhhh..eeee......eeeeee.hhhhhh.......hhhhhhhhhhhhhh.........hhhhhhhhhhhh...hhhhhhhhhhhhh......hhhhhhhhhhhhhhhhhheeee....eeee........hhhhhhhhh...hhhhhhhhhh................... Sec.struct. author
                 SAPs(SNPs) -------------------------A------------------------------------------------I----------------G---------------K---------------------------S---------------V-----------------------------------------------------------------------------------------------------------------------------S-------------------S----------------------------------------------- SAPs(SNPs)
                    PROSITE ---------------------------------------------------------------------XPG_1          -------------------------------------------------------XPG_2          ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- PROSITE
                 Transcript --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Transcript
                 3qea Z   2 GIQGLLQFIKEASEPIHVRKYKGQVVAVDTYCWLHKGAIACAEKLAKGEPTDRYVGFCMKFVNMLLSHGIKPILVFDGCTLPSKKEVERSRRERRQANLLKGKQLLREGKVSEARECFTRSINITHAMAHKVIKAARSQGVDCLVAPYEADAQLAYLNKAGIVQAIITEDSDLLAFGCKKVILKMDQFGNGLEIDQARLGMCRQLGDVFTEEKFRYMCILSGCDYLSSLRGIGLAKACKVLRLANNPDIVKVIKKIGHYLKMNITVPEDYINGFIRANNTFLYQLVFDPIKRKLIPLNAYEDDVDPETLSYAGQYVDDSIALQIALGNKDINTFEQIDDYNPDTA 346
                                    11        21        31        41        51        61        71        81        91       101       111       121       131       141       151       161       171       181       191       201       211       221       231       241       251       261       271       281       291       301       311       321       331       341     

   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  (0, 0)

(no "SCOP Domain" information available for 3QEA)

(-) CATH Domains  (0, 0)

(no "CATH Domain" information available for 3QEA)

(-) Pfam Domains  (2, 2)

Asymmetric/Biological Unit
(-)
Clan: PIN (27)

(-) Gene Ontology  (34, 34)

Asymmetric/Biological Unit(hide GO term definitions)
Chain Z   (EXO1_HUMAN | Q9UQ84)
molecular function
    GO:0035312    5'-3' exodeoxyribonuclease activity    Catalysis of the sequential cleavage of mononucleotides from a free 5' terminus of a DNA molecule.
    GO:0008409    5'-3' exonuclease activity    Catalysis of the hydrolysis of ester linkages within nucleic acids by removing nucleotide residues from the 5' end.
    GO:0003677    DNA binding    Any molecular function by which a gene product interacts selectively and non-covalently with DNA (deoxyribonucleic acid).
    GO:0004523    RNA-DNA hybrid ribonuclease activity    Catalysis of the endonucleolytic cleavage of RNA in RNA-DNA hybrids to 5'-phosphomonoesters.
    GO:0003824    catalytic activity    Catalysis of a biochemical reaction at physiological temperatures. In biologically catalyzed reactions, the reactants are known as substrates, and the catalysts are naturally occurring macromolecular substances known as enzymes. Enzymes possess specific binding sites for substrates, and are usually composed wholly or largely of protein, but RNA that has catalytic activity (ribozyme) is often also regarded as enzymatic.
    GO:0003682    chromatin binding    Interacting selectively and non-covalently with chromatin, the network of fibers of DNA, protein, and sometimes RNA, that make up the chromosomes of the eukaryotic nucleus during interphase.
    GO:0051908    double-stranded DNA 5'-3' exodeoxyribonuclease activity    Catalysis of the sequential cleavage of mononucleotides from a free 5' terminus of a double-stranded DNA molecule.
    GO:0004519    endonuclease activity    Catalysis of the hydrolysis of ester linkages within nucleic acids by creating internal breaks.
    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:0048256    flap endonuclease activity    Catalysis of the cleavage of a flap structure in DNA, but not other DNA structures; processes the ends of Okazaki fragments in lagging strand DNA synthesis.
    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:0016788    hydrolase activity, acting on ester bonds    Catalysis of the hydrolysis of any ester bond.
    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: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:0045145    single-stranded DNA 5'-3' exodeoxyribonuclease activity    Catalysis of the sequential cleavage of nucleotides (such as mononucleotides or dinucleotides) from a free 5' terminus of a single-stranded DNA molecule.
biological process
    GO:0006310    DNA recombination    Any process in which a new genotype is formed by reassortment of genes resulting in gene combinations different from those that were present in the parents. In eukaryotes genetic recombination can occur by chromosome assortment, intrachromosomal recombination, or nonreciprocal interchromosomal recombination. Intrachromosomal recombination occurs by crossing over. In bacteria it may occur by genetic transformation, conjugation, transduction, or F-duction.
    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:0006260    DNA replication    The cellular metabolic process in which a cell duplicates one or more molecules of DNA. DNA replication begins when specific sequences, known as origins of replication, are recognized and bound by initiation proteins, and ends when the original DNA molecule has been completely duplicated and the copies topologically separated. The unit of replication usually corresponds to the genome of the cell, an organelle, or a virus. The template for replication can either be an existing DNA molecule or RNA.
    GO:0000731    DNA synthesis involved in DNA repair    Synthesis of DNA that proceeds from the broken 3' single-strand DNA end and uses the homologous intact duplex as the template.
    GO:0090502    RNA phosphodiester bond hydrolysis, endonucleolytic    The chemical reactions and pathways involving the hydrolysis of internal 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.
    GO:0002455    humoral immune response mediated by circulating immunoglobulin    An immune response dependent upon secreted immunoglobulin. An example of this process is found in Mus musculus.
    GO:0002376    immune system process    Any process involved in the development or functioning of the immune system, an organismal system for calibrated responses to potential internal or invasive threats.
    GO:0045190    isotype switching    The switching of activated B cells from IgM biosynthesis to biosynthesis of other isotypes of immunoglobulin, accomplished through a recombination process involving an intrachromosomal deletion involving switch regions that reside 5' of each constant region gene segment in the immunoglobulin heavy chain locus.
    GO:0051321    meiotic cell cycle    Progression through the phases of the meiotic cell cycle, in which canonically a cell replicates to produce four offspring with half the chromosomal content of the progenitor cell via two nuclear divisions.
    GO:0006298    mismatch repair    A system for the correction of errors in which an incorrect base, which cannot form hydrogen bonds with the corresponding base in the parent strand, is incorporated into the daughter strand. The mismatch repair system promotes genomic fidelity by repairing base-base mismatches, insertion-deletion loops and heterologies generated during DNA replication and recombination.
    GO:0090305    nucleic acid phosphodiester bond hydrolysis    The nucleic acid metabolic process in which the phosphodiester bonds between nucleotides are cleaved by hydrolysis.
    GO:1901796    regulation of signal transduction by p53 class mediator    Any process that modulates the frequency, rate or extent of signal transduction by p53 class mediator.
    GO:0016446    somatic hypermutation of immunoglobulin genes    Mutations occurring somatically that result in amino acid changes in the rearranged V regions of immunoglobulins.
    GO:0000732    strand displacement    The rejection of the broken 3' single-strand DNA molecule that formed heteroduplex DNA with its complement in an intact duplex DNA. The Watson-Crick base pairing in the original duplex is restored. The rejected 3' single-strand DNA molecule reanneals with its original complement to reform two intact duplex molecules.
cellular component
    GO:0005737    cytoplasm    All of the contents of a cell excluding the plasma membrane and nucleus, but including other subcellular structures.
    GO:0005654    nucleoplasm    That part of the nuclear content other than the chromosomes or the nucleolus.
    GO:0005634    nucleus    A membrane-bounded organelle of eukaryotic cells in which chromosomes are housed and replicated. In most cells, the nucleus contains all of the cell's chromosomes except the organellar chromosomes, and is the site of RNA synthesis and processing. In some species, or in specialized cell types, RNA metabolism or DNA replication may be absent.

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 Related Entries

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

UniProtKB/Swiss-Prot
        EXO1_HUMAN | Q9UQ843qe9 3qeb 5uzv 5v04 5v05 5v06 5v07 5v08 5v09 5v0a 5v0b 5v0c 5v0d 5v0e

(-) Related Entries Specified in the PDB File

3qe9 3qeb