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(-) Description

Title :  YEAST DNA TOPOISOMERASE I, N-TERMINAL FRAGMENT
 
Authors :  N. Lue, A. Sharma, A. Mondragon, J. C. Wang
Date :  14 Sep 96  (Deposition) - 12 Mar 97  (Release) - 24 Feb 09  (Revision)
Method :  X-RAY DIFFRACTION
Resolution :  1.90
Chains :  Asym./Biol. Unit :  A
Keywords :  Isomerase, Topoisomerase, Dna-Binding Protein (Keyword Search: [Gene Ontology, PubMed, Web (Google))
 
Reference :  N. Lue, A. Sharma, A. Mondragon, J. C. Wang
A 26 Kda Yeast Dna Topoisomerase I Fragment: Crystallographic Structure And Mechanistic Implications.
Structure V. 3 1315 1995
PubMed-ID: 8747458  |  Reference-DOI: 10.1016/S0969-2126(01)00269-6
(for further references see the PDB file header)

(-) Compounds

Molecule 1 - DNA TOPOISOMERASE I
    ChainsA
    EC Number5.99.1.2
    EngineeredYES
    Expression SystemSACCHAROMYCES CEREVISIAE
    Expression System CommonBAKER'S YEAST
    Expression System GeneTOP1
    Expression System PlasmidPYT-N
    Expression System Taxid4932
    FragmentN-TERMINAL FRAGMENT, RESIDUES 141 - 363
    GeneTOP1
    Organism CommonBAKER'S YEAST
    Organism ScientificSACCHAROMYCES CEREVISIAE
    Organism Taxid4932
    Other DetailsYEAST GALACTOSE INDUCIBLE EXPRESSION SYSTEM
    StrainBCY123/PYT-N

 Structural Features

(-) Chains, Units

  1
Asymmetric/Biological Unit A

Summary Information (see also Sequences/Alignments below)

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

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

(-) Sites  (0, 0)

(no "Site" information available for 1OIS)

(-) SS Bonds  (0, 0)

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

(-) Cis Peptide Bonds  (0, 0)

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

 Sequence-Structure Mapping

(-) SAPs(SNPs)/Variants  (0, 0)

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

(-) PROSITE Motifs  (0, 0)

(no "PROSITE Motif" information available for 1OIS)

(-) Exons   (1, 1)

Asymmetric/Biological Unit (1, 1)
 ENSEMBLUniProtKBPDB
No.Transcript IDExonExon IDGenome LocationLengthIDLocationLengthCountLocationLength
1.1YOL006C1YOL006C.1XV:315388-3130792310TOP1_YEAST1-7697691A:141-363 (gaps)223

(-) Sequences/Alignments

Asymmetric/Biological Unit
   Reformat: Number of residues per line =  ('0' or empty: single-line sequence representation)
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  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:221
 aligned with TOP1_YEAST | P04786 from UniProtKB/Swiss-Prot  Length:769

    Alignment length:223
                                   150       160       170       180       190       200       210       220       230       240       250       260       270       280       290       300       310       320       330       340       350       360   
           TOP1_YEAST   141 DTIKWVTLKHNGVIFPPPYQPLPSHIKLYYDGKPVDLPPQAEEVAGFFAALLESDHAKNPVFQKNFFNDFLQVLKESGGPLNGIEIKEFSRCDFTKMFDYFQLQKEQKKQLTSQEKKQIRLEREKFEEDYKFCELDGRREQVGNFKVEPPDLFRGRGAHPKTGKLKRRVNPEDIVLNLSKDAPVPPAPEGHKWGEIRHDNTVQWLAMWRENIFNSFKYVRLAA 363
               SCOP domains d1oisa_ A: Eukaryotic DNA topoisomerase I, N-terminal DNA-binding fragment                                                                                                                                                      SCOP domains
               CATH domains 1oisA02            1oisA01 A:160-251 Yeast DNA topoisomerase - domain 1                                        ---1oisA02 A:141-159,A:255-363 DNA Topoisomerase I, domain 2                                                     CATH domains
               Pfam domains --Topoisom_I_N-1oisA01 A:143-361                                                                                                                                                                                             -- Pfam domains
         Sec.struct. author ...........................eee..eee...hhhhhhhhhhhhh....hhh.hhhhhhhhhhhhhhhhh............hhh...hhhhhhhhhhhhhhhh..--.hhhhhhhhhhhhhhhheeee..eeee.............................hhh.eee.................eee........eeee......eeee.... Sec.struct. author
                 SAPs(SNPs) ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- PROSITE
               Transcript 1 Exon 1.1  PDB: A:141-363 (gaps) UniProt: 1-769 [INCOMPLETE]                                                                                                                                                                     Transcript 1
                 1ois A 141 DTIKWVTLKHNGVIFPPPYQPLPSHIKLYYDGKPVDLPPQAEEVAGFFAALLESDHAKNPVFQKNFFNDFLQVLKESGGPLNGIEIKEFSRCDFTKMFDYFQLQKEQKKQLT--EKKQIRLEREKFEEDYKFCELDGRREQVGNFKVEPPDLFRGRGAHPKTGKLKRRVNPEDIVLNLSKDAPVPPAPEGHKWGEIRHDNTVQWLAMWRENIFNSFKYVRLAA 363
                                   150       160       170       180       190       200       210       220       230       240       250 |  |  260       270       280       290       300       310       320       330       340       350       360   
                                                                                                                                         252  |                                                                                                            
                                                                                                                                            255                                                                                                            

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  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  (2, 2)

Asymmetric/Biological Unit
(-)
Class: Mainly Beta (13760)

(-) Pfam Domains  (1, 1)

Asymmetric/Biological Unit

(-) Gene Ontology  (20, 20)

Asymmetric/Biological Unit(hide GO term definitions)
Chain A   (TOP1_YEAST | P04786)
molecular function
    GO:0003677    DNA binding    Any molecular function by which a gene product interacts selectively and non-covalently with DNA (deoxyribonucleic acid).
    GO:0003916    DNA topoisomerase activity    Catalysis of the transient cleavage and passage of individual DNA strands or double helices through one another, resulting a topological transformation in double-stranded DNA.
    GO:0003917    DNA topoisomerase type I activity    Catalysis of a DNA topological transformation by transiently cleaving one DNA strand at a time to allow passage of another strand; changes the linking number by +1 per catalytic cycle.
    GO:0003918    DNA topoisomerase type II (ATP-hydrolyzing) activity    Catalysis of a DNA topological transformation by transiently cleaving a pair of complementary DNA strands to form a gate through which a second double-stranded DNA segment is passed, after which the severed strands in the first DNA segment are rejoined; product release is coupled to ATP binding and hydrolysis; changes the linking number in multiples of 2.
    GO:0016853    isomerase activity    Catalysis of the geometric or structural changes within one molecule. Isomerase is the systematic name for any enzyme of EC class 5.
biological process
    GO:0006271    DNA strand elongation involved in DNA replication    The process in which a DNA strand is synthesized from template DNA during replication by the action of polymerases, which add nucleotides to the 3' end of the nascent DNA strand.
    GO:0006265    DNA topological change    The process in which a transformation is induced in the topological structure of a double-stranded DNA helix, resulting in a change in linking number.
    GO:0006333    chromatin assembly or disassembly    The formation or destruction of chromatin structures.
    GO:0006338    chromatin remodeling    Dynamic structural changes to eukaryotic chromatin occurring throughout the cell division cycle. These changes range from the local changes necessary for transcriptional regulation to global changes necessary for chromosome segregation.
    GO:0000183    chromatin silencing at rDNA    Repression of transcription of ribosomal DNA by altering the structure of chromatin.
    GO:0007076    mitotic chromosome condensation    The cell cycle process in which chromatin structure is compacted prior to and during mitosis in eukaryotic cells.
    GO:0007097    nuclear migration    The directed movement of the nucleus.
    GO:0000019    regulation of mitotic recombination    Any process that modulates the frequency, rate or extent of DNA recombination during mitosis.
    GO:0006357    regulation of transcription from RNA polymerase II promoter    Any process that modulates the frequency, rate or extent of transcription from an RNA polymerase II promoter.
    GO:0006368    transcription elongation from RNA polymerase II promoter    The extension of an RNA molecule after transcription initiation and promoter clearance at an RNA polymerase II promoter by the addition of ribonucleotides catalyzed by RNA polymerase II.
cellular component
    GO:0005694    chromosome    A structure composed of a very long molecule of DNA and associated proteins (e.g. histones) that carries hereditary information.
    GO:0005730    nucleolus    A small, dense body one or more of which are present in the nucleus of eukaryotic cells. It is rich in RNA and protein, is not bounded by a limiting membrane, and is not seen during mitosis. Its prime function is the transcription of the nucleolar DNA into 45S ribosomal-precursor RNA, the processing of this RNA into 5.8S, 18S, and 28S components of ribosomal RNA, and the association of these components with 5S RNA and proteins synthesized outside the nucleolus. This association results in the formation of ribonucleoprotein precursors; these pass into the cytoplasm and mature into the 40S and 60S subunits of the ribosome.
    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.
    GO:0031298    replication fork protection complex    A protein complex conserved in eukaryotes and associated with the replication fork; the complex stabilizes stalled replication forks and is thought to be involved in coordinating leading- and lagging-strand synthesis and in replication checkpoint signaling.

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