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(-) Description

Title :  CRYSTAL STRUCTURE OF THE MUS81-EME1 COMPLEX
 
Authors :  J. H. Chang, J. J. Kim, J. M. Choi, J. H. Lee, Y. Cho
Date :  25 Feb 08  (Deposition) - 29 Apr 08  (Release) - 24 Feb 09  (Revision)
Method :  X-RAY DIFFRACTION
Resolution :  2.80
Chains :  Asym./Biol. Unit :  A,B
Keywords :  Helix-Hairpin-Helix, Alternative Splicing, Dna Damage, Dna Recombination, Dna Repair, Endonuclease, Hydrolase, Magnesium, Metal-Binding, Nuclease, Nucleus, Phosphoprotein, Polymorphism (Keyword Search: [Gene Ontology, PubMed, Web (Google))
 
Reference :  J. H. Chang, J. J. Kim, J. M. Choi, J. H. Lee, Y. Cho
Crystal Structure Of The Mus81-Eme1 Complex
Genes Dev. V. 22 1093 2008
PubMed-ID: 18413719  |  Reference-DOI: 10.1101/GAD.1618708
(for further references see the PDB file header)

(-) Compounds

Molecule 1 - MUS81 PROTEIN
    ChainsA
    EngineeredYES
    Expression SystemESCHERICHIA COLI BL21(DE3)
    Expression System PlasmidPCDF DUET
    Expression System StrainBL21(DE3)
    Expression System Taxid469008
    Expression System Vector TypePLASMID
    FragmentNUCLEASE DOMAIN AND C-TERMINAL DOMAIN, UNP RESIDUES 303-612
    GeneMUS81
    Organism CommonZEBRAFISH
    Organism ScientificDANIO RERIO
    Organism Taxid7955
    SynonymDNA STRUCTURE SPECIFIC ENDONUCLEASE MUS81
 
Molecule 2 - CROSSOVER JUNCTION ENDONUCLEASE EME1
    ChainsB
    EC Number3.1.22.-
    EngineeredYES
    Expression SystemESCHERICHIA COLI BL21(DE3)
    Expression System PlasmidPET DUET
    Expression System StrainBL21(DE3)
    Expression System Taxid469008
    Expression System Vector TypePLASMID
    FragmentNUCLEASE-LIKE DOMAIN AND C-TERMINAL DOMAIN, UNP RESIDUES 246-570
    GeneEME1
    Organism CommonHUMAN
    Organism ScientificHOMO SAPIENS
    Organism Taxid9606
    SynonymHMMS4, DNA REPAIR PROTEIN EME1

 Structural Features

(-) Chains, Units

  12
Asymmetric/Biological Unit AB

Summary Information (see also Sequences/Alignments below)

(-) Ligands, Modified Residues, Ions  (1, 8)

Asymmetric/Biological Unit (1, 8)
No.NameCountTypeFull Name
1MSE8Mod. Amino AcidSELENOMETHIONINE

(-) Sites  (0, 0)

(no "Site" information available for 2ZIW)

(-) SS Bonds  (0, 0)

(no "SS Bond" information available for 2ZIW)

(-) Cis Peptide Bonds  (1, 1)

Asymmetric/Biological Unit
No.Residues
1Ala B:446 -Pro B:447

 Sequence-Structure Mapping

(-) SAPs(SNPs)/Variants  (1, 1)

Asymmetric/Biological Unit (1, 1)
  dbSNPPDB
No.SourceVariant IDVariantUniProt IDStatusIDChainVariant
1UniProtVAR_025339I350TEME1_HUMANPolymorphism12450550BI350T

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

(-) PROSITE Motifs  (0, 0)

(no "PROSITE Motif" information available for 2ZIW)

(-) Exons   (0, 0)

(no "Exon" information available for 2ZIW)

(-) 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:271
 aligned with MUS81_DANRE | Q7SXA9 from UniProtKB/Swiss-Prot  Length:604

    Alignment length:301
                                   313       323       333       343       353       363       373       383       393       403       413       423       433       443       453       463       473       483       493       503       513       523       533       543       553       563       573       583       593       603 
          MUS81_DANRE   304 WHLSPGSYDIVLCVDLCETTGGSSVRKQELVKELQRNSVTFDVRKLNVGDFLWVARERVTPVPGQLRPPVGKELVLDYIIERKRMDDLCGSIIDGRFREQKFRLKRCGLRKPIYLVEECGSAAAHLSIPESTLQQAIVNTQVVDGFFVKRVQDAKESAAYLTIMTRYLQKLYQNCTLLCRSRELEGDGEAESEKMVANLSCSLMAFTEFNYGAIKNKCQTVREVFARQLMQISGVSGDKAAAVLKHYSTVSSLLQAYDKCSSETEKEKLLSSVKYGKLKRNLGPALSRTIYQLYCTRGPLS 604
               SCOP domains ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- SCOP domains
               CATH domains ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- CATH domains
               Pfam domains ----------ERCC4-2zi        wA01 A:322-431                                                                                    ------------------------------------------------------                 --------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author ........eeeeee.....--------hhhhhhhhh....eee........eeeee................eeeeeeeeeeeehhhhhhhhhh.hhhhhhhhhh.....eeeeeee...-----...hhhhhhhhhhhhhhh...eeee..hhhhhhhhhhhhhhhhhh.........-----------------.......eehhhhhhhhhhhhh.hhhhhhhhhhh.....hhhhhhhhhhhh.hhhhhhhhhhh..hhhhhh..............hhhhhhhhhhhhhh...... Sec.struct. author
                 SAPs(SNPs) ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- PROSITE
                 Transcript ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Transcript
                 2ziw A 312 WHLSPGSYDIVLCVDLCET--------QELVKELQRNSVTFDVRKLNVGDFLWVARERVTPVPGQLRPPVGKELVLDYIIERKRmDDLCGSIIDGRFREQKFRLKRCGLRKPIYLVEECG-----LSIPESTLQQAIVNTQVVDGFFVKRVQDAKESAAYLTImTRYLQKLYQNCTLFC-----------------ANLSCSLmAFTEFNYGAIKNKCQTVREVFARQLmQISGVSGDKAAAVLEHYSTVSSLLQAYDKCSSETEKEKLLSSVKYGKLKRNLGPALSRTIYQLYCTRGPLS 612
                                   321        |-       341       351       361       371       381       391    |  401       411       421       431     | 441       451       461       471   |   481        |-         -      |511   |   521       531       541       551       561       571       581       591       601       611 
                                            330      339                                                      396-MSE                            431   437                                   475-MSE        490               508      |                       541-MSE                                                                   
                                                                                                                                                                                                                                     515-MSE                                                                                             

Chain A from PDB  Type:PROTEIN  Length:271
 aligned with Q6GML8_DANRE | Q6GML8 from UniProtKB/TrEMBL  Length:612

    Alignment length:301
                                   321       331       341       351       361       371       381       391       401       411       421       431       441       451       461       471       481       491       501       511       521       531       541       551       561       571       581       591       601       611 
         Q6GML8_DANRE   312 WHLSPGSYDIVLCVDLCETTGGSSVRKQELVKELQRNSVTFDVRKLNVGDFLWVARERVTPVPGQLRPPVGKELVLDYIIERKRMDDLCGSIIDGRFREQKFRLKRCGLRKPIYLVEECGSAAAHLSIPESTLQQAIVNTQVVDGFFVKRVQDAKESAAYLTIMTRYLQKLYQNCTLFCRSRELEGDGEAESEKMVANLSCSLMAFTEFNYGAIKNKCQTVREVFARQLMQISGVSGDKAAAVLEHYSTVSSLLQAYDKCSSETEKEKLLSSVKYGKLKRNLGPALSRTIYQLYCTRGPLS 612
               SCOP domains ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- SCOP domains
               CATH domains ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- CATH domains
               Pfam domains ----------ERCC4-2zi        wA01 A:322-431                                                                                    ------------------------------------------------------                 --------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author ........eeeeee.....--------hhhhhhhhh....eee........eeeee................eeeeeeeeeeeehhhhhhhhhh.hhhhhhhhhh.....eeeeeee...-----...hhhhhhhhhhhhhhh...eeee..hhhhhhhhhhhhhhhhhh.........-----------------.......eehhhhhhhhhhhhh.hhhhhhhhhhh.....hhhhhhhhhhhh.hhhhhhhhhhh..hhhhhh..............hhhhhhhhhhhhhh...... Sec.struct. author
                 SAPs(SNPs) ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- PROSITE
                 Transcript ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Transcript
                 2ziw A 312 WHLSPGSYDIVLCVDLCET--------QELVKELQRNSVTFDVRKLNVGDFLWVARERVTPVPGQLRPPVGKELVLDYIIERKRmDDLCGSIIDGRFREQKFRLKRCGLRKPIYLVEECG-----LSIPESTLQQAIVNTQVVDGFFVKRVQDAKESAAYLTImTRYLQKLYQNCTLFC-----------------ANLSCSLmAFTEFNYGAIKNKCQTVREVFARQLmQISGVSGDKAAAVLEHYSTVSSLLQAYDKCSSETEKEKLLSSVKYGKLKRNLGPALSRTIYQLYCTRGPLS 612
                                   321        |-       341       351       361       371       381       391    |  401       411       421       431     | 441       451       461       471   |   481        |-         -      |511   |   521       531       541       551       561       571       581       591       601       611 
                                            330      339                                                      396-MSE                            431   437                                   475-MSE        490               508      |                       541-MSE                                                                   
                                                                                                                                                                                                                                     515-MSE                                                                                             

Chain B from PDB  Type:PROTEIN  Length:228
 aligned with EME1_HUMAN | Q96AY2 from UniProtKB/Swiss-Prot  Length:570

    Alignment length:318
                                   259       269       279       289       299       309       319       329       339       349       359       369       379       389       399       409       419       429       439       449       459       469       479       489       499       509       519       529       539       549       559        
           EME1_HUMAN   250 KHIIVVLDPVLLQMEGGGQLLGALQTMECRCVIEAQAVPCSVTWRRRAGPSEDREDWVEEPTVLVLLRAEAFVSMIDNGKQGSLDSTMKGKETLQGFVTDITAKTAGKALSLVIVDQEKCFSAQNPPRRGKQGANKQTKKQQQRQPEASIGSMVSRVDAEEALVDLQLHTEAQAQIVQSWKELADFTCAFTKAVAEAPFKKLRDETTFSFCLESDWAGGVKVDLAGRGLALVWRRQIQQLNRVSLEMASAVVNAYPSPQLLVQAYQQCFSDKERQNLLADIQVRRGEGVTSTSRRIGPELSRRIYLQMTTLQPHLSLD 567
               SCOP domains ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ SCOP domains
               CATH domains ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ CATH domains
               Pfam domains ---ERCC4-2ziwB01 B:253-515                                                                                                                                                                                                                                                -------------------         ------------------------ Pfam domains
         Sec.struct. author .......hhhhhh..hhhhhhhhhhhh.............ee...------------......eee....-----------------------------hhhhhhhh.--..eee.ee.-----------------------------------.hhhhhhhhhhhhh.......ee..hhhhhhhhhhhhhhhh...---....hhhhhhh...............hhhhhhhhhhh.....hhhhhhhhhhhh.hhhhhhhhhh...hhhhhh..........---------...hhhhhhhhhhhh......... Sec.struct. author
                 SAPs(SNPs) ----------------------------------------------------------------------------------------------------T------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ PROSITE
                 Transcript ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ Transcript
                 2ziw B 250 KHIIVVLDPVLLQmEGGGQLLGALQTmECRCVIEAQAVPCSVTWR------------VEEPTVLVLLRAE-----------------------------DITAKTAGK--SLVIVDQEK-----------------------------------SRVDAEEALVDLQLHTEAQAQIVQSWKELADFTCAFTKAVAEAP---LRDETTFSFCLESDWAGGVKVDLAGRGLALVWRRQIQQLNRVSLEmASAVVNAYPSPQLLVQAYQQCFSDKERQNLLADIQVRR---------RIGPELSRRIYLQmTTLQPHLSLD 567
                                   259   |   269      |279       289    |    -       309       319         -         -       349       | -|       |-         -         -         -    |  409       419       429       439       | - |     459       469       479       489      |499       509       519       529    |    -    |  549       559        
                                       263-MSE      276-MSE           294          307         319                           349     357  |     368                                 404                                        447 451                                          496-MSE                               534       544          557-MSE      
                                                                                                                                        360                                                                                                                                                                                                               

   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 2ZIW)

(-) CATH Domains  (0, 0)

(no "CATH Domain" information available for 2ZIW)

(-) Pfam Domains  (2, 2)

Asymmetric/Biological Unit

(-) Gene Ontology  (22, 41)

Asymmetric/Biological Unit(hide GO term definitions)
Chain A   (Q6GML8_DANRE | Q6GML8)
molecular function
    GO:0003677    DNA binding    Any molecular function by which a gene product interacts selectively and non-covalently with DNA (deoxyribonucleic acid).
    GO:0008821    crossover junction endodeoxyribonuclease activity    Catalysis of the endonucleolytic cleavage at a junction such as a reciprocal single-stranded crossover between two homologous DNA duplexes (Holliday junction).
    GO:0004518    nuclease activity    Catalysis of the hydrolysis of ester linkages within nucleic acids.
biological process
    GO:0006259    DNA metabolic process    Any cellular metabolic process involving deoxyribonucleic acid. This is one of the two main types of nucleic acid, consisting of a long, unbranched macromolecule formed from one, or more commonly, two, strands of linked 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:0090305    nucleic acid phosphodiester bond hydrolysis    The nucleic acid metabolic process in which the phosphodiester bonds between nucleotides are cleaved by hydrolysis.
cellular component
    GO:0048476    Holliday junction resolvase complex    A protein complex that mediates the conversion of a Holliday junction into two separate duplex DNA molecules; the complex includes a single- or multisubunit helicase that catalyzes the extension of heteroduplex DNA by branch migration and a nuclease that resolves the junction by nucleolytic cleavage.
    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.

Chain A   (MUS81_DANRE | Q7SXA9)
molecular function
    GO:0003677    DNA binding    Any molecular function by which a gene product interacts selectively and non-covalently with DNA (deoxyribonucleic acid).
    GO:0008821    crossover junction endodeoxyribonuclease activity    Catalysis of the endonucleolytic cleavage at a junction such as a reciprocal single-stranded crossover between two homologous DNA duplexes (Holliday junction).
    GO:0004519    endonuclease activity    Catalysis of the hydrolysis of ester linkages within nucleic acids by creating internal breaks.
    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: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.
biological process
    GO:0006259    DNA metabolic process    Any cellular metabolic process involving deoxyribonucleic acid. This is one of the two main types of nucleic acid, consisting of a long, unbranched macromolecule formed from one, or more commonly, two, strands of linked deoxyribonucleotides.
    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: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:0090305    nucleic acid phosphodiester bond hydrolysis    The nucleic acid metabolic process in which the phosphodiester bonds between nucleotides are cleaved by hydrolysis.
cellular component
    GO:0048476    Holliday junction resolvase complex    A protein complex that mediates the conversion of a Holliday junction into two separate duplex DNA molecules; the complex includes a single- or multisubunit helicase that catalyzes the extension of heteroduplex DNA by branch migration and a nuclease that resolves the junction by nucleolytic cleavage.
    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.

Chain B   (EME1_HUMAN | Q96AY2)
molecular function
    GO:0003677    DNA binding    Any molecular function by which a gene product interacts selectively and non-covalently with DNA (deoxyribonucleic acid).
    GO:0004520    endodeoxyribonuclease activity    Catalysis of the hydrolysis of ester linkages within deoxyribonucleic acid by creating internal breaks.
    GO:0004519    endonuclease activity    Catalysis of the hydrolysis of ester linkages within nucleic acids by creating internal breaks.
    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: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).
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: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:0036297    interstrand cross-link repair    Removal of a DNA interstrand crosslink (a covalent attachment of DNA bases on opposite strands of the DNA) and restoration of the DNA. DNA interstrand crosslinks occur when both strands of duplex DNA are covalently tethered together (e.g. by an exogenous or endogenous agent), thus preventing the strand unwinding necessary for essential DNA functions such as transcription and replication.
    GO:0090305    nucleic acid phosphodiester bond hydrolysis    The nucleic acid metabolic process in which the phosphodiester bonds between nucleotides are cleaved by hydrolysis.
    GO:0072429    response to intra-S DNA damage checkpoint signaling    A process that occurs in response to signals generated as a result of intra-S DNA damage checkpoint signaling.
cellular component
    GO:0048476    Holliday junction resolvase complex    A protein complex that mediates the conversion of a Holliday junction into two separate duplex DNA molecules; the complex includes a single- or multisubunit helicase that catalyzes the extension of heteroduplex DNA by branch migration and a nuclease that resolves the junction by nucleolytic cleavage.
    GO:0005737    cytoplasm    All of the contents of a cell excluding the plasma membrane and nucleus, but including other subcellular structures.
    GO:0000790    nuclear chromatin    The ordered and organized complex of DNA, protein, and sometimes RNA, that forms the chromosome in the nucleus.
    GO:0005720    nuclear heterochromatin    A condensed form of chromatin, occurring in the nucleus during interphase, that stains strongly with basophilic dyes. The DNA of heterochromatin is typically replicated at a later stage in the cell-division cycle than euchromatin.
    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.

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 Related Entries

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

UniProtKB/Swiss-Prot
        EME1_HUMAN | Q96AY22ziu 2ziv 2zix 4p0p 4p0q 4p0r 4p0s
        MUS81_DANRE | Q7SXA92ziu 2ziv
        Q6GML8_DANRE | Q6GML82ziu 2ziv

(-) Related Entries Specified in the PDB File

2ziu 2ziv 2zix