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(-) Description

Title :  CRYSTAL STRUCTURE OF TRF2 TRFH DOMAIN AND TIN2 PEPTIDE COMPLEX
 
Authors :  Y. Chen, Y. Yang, M. Van Overbeek, J. R. Donigian, P. Baciu, T. De Lange, M. Lei
Date :  02 Jan 08  (Deposition) - 19 Feb 08  (Release) - 24 Feb 09  (Revision)
Method :  X-RAY DIFFRACTION
Resolution :  2.15
Chains :  Asym. Unit :  A,B,C,D
Biol. Unit 1:  A,B,C,D  (2x)
Biol. Unit 2:  A (1x),B (1x),C (1x),D (1x)
Biol. Unit 3:  A,C  (1x)
Biol. Unit 4:  B,D  (1x)
Keywords :  Trf2 Trfh Domain Trf2 Dimerization Domain Tin2 Peptide, Alternative Splicing, Cell Cycle, Chromosomal Protein, Dna- Binding, Nucleus, Phosphoprotein, Telomere, Dna Binding Protein (Keyword Search: [Gene Ontology, PubMed, Web (Google)] )
 
Reference :  Y. Chen, Y. Yang, M. Van Overbeek, J. R. Donigian, P. Baciu, T. De Lange, M. Lei
A Shared Docking Motif In Trf1 And Trf2 Used For Differential Recruitment Of Telomeric Proteins.
Science V. 319 1092 2008
PubMed-ID: 18202258  |  Reference-DOI: 10.1126/SCIENCE.1151804
(for further references see the PDB file header)

(-) Compounds

Molecule 1 - TELOMERIC REPEAT-BINDING FACTOR 2
    Chains: A, B
    Engineered: YES
    Expression System: ESCHERICHIA COLI BL21(DE3)
    Expression System Plasmid: PET28B-SUMO
    Expression System Strain: BL21 (DE3)
    Expression System Taxid: 469008
    Expression System Vector Type: PLASMID
    Fragment: TRFH DOMAIN, DIMERIZATION DOMAIN
    Gene: TERF2, TRBF2, TRF2
    Organism Common: HUMAN
    Organism Scientific: HOMO SAPIENS
    Organism Taxid: 9606
    Synonym: TTAGGG REPEAT-BINDING FACTOR 2, TELOMERIC DNA- BINDING PROTEIN
 
Molecule 2 - TERF1-INTERACTING NUCLEAR FACTOR 2
    Chains: C, D
    Engineered: YES
    Expression System: ESCHERICHIA COLI BL21(DE3)
    Expression System Plasmid: PET28B-SUMO
    Expression System Strain: BL21 (DE3)
    Expression System Taxid: 469008
    Expression System Vector Type: PLASMID
    Fragment: UNP RESIDUES 2-19
    Gene: TINF2, TIN2
    Organism Common: HUMAN
    Organism Scientific: HOMO SAPIENS
    Organism Taxid: 9606
    Synonym: TRF1-INTERACTING NUCLEAR PROTEIN 2

 Structural Features

(-) Chains, Units

  1234
Asymmetric Unit : ABCD
Biological Unit 1 (2x): ABCD
Biological Unit 2 (1x): A (1x)B (1x)C (1x)D (1x)
Biological Unit 3 (1x): A C 
Biological Unit 4 (1x):  B D

Summary Information (see also Sequences/Alignments below)

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

(no "Ligand,Modified Residues,Ions" information available for 3BU8)

(-) Sites  (0, 0)

(no "Site" information available for 3BU8)

(-) SS Bonds  (0, 0)

(no "SS Bond" information available for 3BU8)

(-) Cis Peptide Bonds  (0, 0)

(no "Cis Peptide Bond" information available for 3BU8)

 Sequence-Structure Mapping

(-) SAPs(SNPs)/Variants  (0, 0)

(no "SAP(SNP)/Variant" information available for 3BU8)

(-) PROSITE Motifs  (0, 0)

(no "PROSITE Motif" information available for 3BU8)

(-) Exons   (8, 15)

Asymmetric Unit (8, 15)
 ENSEMBLUniProtKBPDB
No.Transcript IDExonExon IDGenome LocationLengthIDLocationLengthCountLocationLength
1.1ENST000002549421ENSE00001141462chr16:69419859-69419496364TERF2_HUMAN1-85851-
B:43-43		-
1
1.2ENST000002549422ENSE00000904627chr16:69419389-6941929496TERF2_HUMAN85-117332A:44-75
B:43-75		32
33
1.3ENST000002549423ENSE00000904625chr16:69418613-69418483131TERF2_HUMAN117-160442A:75-118
B:75-118		44
44
1.4ENST000002549424ENSE00000904623chr16:69406258-6940617287TERF2_HUMAN161-189292A:119-147
B:119-147		29
29
1.5ENST000002549425ENSE00000904620chr16:69404532-69404386147TERF2_HUMAN190-238492A:148-196
B:148-196		49
49
1.6ENST000002549426ENSE00000904618chr16:69402385-69402279107TERF2_HUMAN239-274362A:197-232
B:197-232		36
36
1.7ENST000002549427ENSE00000904616chr16:69401102-69400710393TERF2_HUMAN274-4051322A:232-247
B:232-249		16
18
1.8ENST000002549428ENSE00000904614chr16:69395392-6939530786TERF2_HUMAN405-434300--
1.9ENST000002549429ENSE00000904612chr16:69391464-6939142144TERF2_HUMAN434-448150--
1.10ENST0000025494210ENSE00001141451chr16:69390959-693894641496TERF2_HUMAN449-500520--
2.1ENST000002674151ENSE00001193210chr14:24711880-24711347534TINF2_HUMAN1-64640--
2.2ENST000002674152ENSE00000654387chr14:24711200-24711096105TINF2_HUMAN65-99350--
2.3ENST000002674153ENSE00001288582chr14:24710982-24710881102TINF2_HUMAN100-133340--
2.4ENST000002674154ENSE00000586400chr14:24710517-24710410108TINF2_HUMAN134-169360--
2.5ENST000002674155ENSE00000654380chr14:24710322-2471022697TINF2_HUMAN170-202330--
2.6aENST000002674156aENSE00001288575chr14:24710081-24709625457TINF2_HUMAN202-3541532C:257-271 (gaps)
D:257-266 (gaps)		26
21
2.6cENST000002674156cENSE00001193206chr14:24709536-2470946968TINF2_HUMAN354-377240--
2.6dENST000002674156dENSE00001193174chr14:24709361-2470927092TINF2_HUMAN377-407310--
2.6eENST000002674156eENSE00001348153chr14:24709137-24708853285TINF2_HUMAN408-451440--

(-) Sequences/Alignments

Asymmetric 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:204
 aligned with TERF2_HUMAN | Q15554 from UniProtKB/Swiss-Prot  Length:542

    Alignment length:204
                                    95       105       115       125       135       145       155       165       175       185       195       205       215       225       235       245       255       265       275       285    
          TERF2_HUMAN    86 GEARLEEAVNRWVLKFYFHEALRAFRGSRYGDFRQIRDIMQALLVRPLGKEHTVSRLLRVMQCLSRIEEGENLDCSFDMEAELTPLESAINVLEMIKTEFTLTEAVVESSRKLVKEAAVIICIKNKEFEKASKILKKHMSKDPTTQKLRNDLLNIIREKNLAHPVIQNFSYETFQQKMLRFLESHLDDAEPYLLTMAKKALKSE 289
               SCOP domains d3bu8a_ A: TRF2                                                                                                                                                                                              SCOP domains
               CATH domains 3bu8A00 A:44-247 Telomeric repeat binding factor (TRF) dimerisation domain                                                                                                                                   CATH domains
               Pfam domains ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ Pfam domains
         Sec.struct. author ...hhhhhhhhhhhhhhhhhhhhhhhh.hhhhhhhhhhhhhhhh......hhhhhhhhhhhhhhhhhhh.....ee.......hhhhhhhhhhhhhhhhh..hhhhhhhhhhhhhhhhhhhhhhh.hhhhhhhhhhhhh..hhhhhhhhhhhhhhhhhh...hhhhhh.hhhhhhhhhhhhhhh......hhhhhhhhhhh... Sec.struct. author
                 SAPs(SNPs) ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ SAPs(SNPs)
                    PROSITE ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ PROSITE
           Transcript 1 (1) -------------------------------Exon 1.3  PDB: A:75-118 UniProt: 117-160    Exon 1.4  PDB: A:119-147     Exon 1.5  PDB: A:148-196 UniProt: 190-238        Exon 1.6  PDB: A:197-232            --------------- Transcript 1 (1)
           Transcript 1 (2) Exon 1.2  PDB: A:44-75          ------------------------------------------------------------------------------------------------------------------------------------------------------------Exon 1.7         Transcript 1 (2)
                 3bu8 A  44 GEARLEEAVNRWVLKFYFHEALRAFRGSRYGDFRQIRDIMQALLVRPLGKEHTVSRLLRVMQCLSRIEEGENLDCSFDMEAELTPLESAINVLEMIKTEFTLTEAVVESSRKLVKEAAVIICIKNKEFEKASKILKKHMSKDPTTQKLRNDLLNIIREKNLAHPVIQNFSYETFQQKMLRFLESHLDDAEPYLLTMAKKALKSE 247
                                    53        63        73        83        93       103       113       123       133       143       153       163       173       183       193       203       213       223       233       243    


Chain B from PDB  Type:PROTEIN  Length:207
 aligned with TERF2_HUMAN | Q15554 from UniProtKB/Swiss-Prot  Length:542

    Alignment length:207
                                    94       104       114       124       134       144       154       164       174       184       194       204       214       224       234       244       254       264       274       284       
          TERF2_HUMAN    85 AGEARLEEAVNRWVLKFYFHEALRAFRGSRYGDFRQIRDIMQALLVRPLGKEHTVSRLLRVMQCLSRIEEGENLDCSFDMEAELTPLESAINVLEMIKTEFTLTEAVVESSRKLVKEAAVIICIKNKEFEKASKILKKHMSKDPTTQKLRNDLLNIIREKNLAHPVIQNFSYETFQQKMLRFLESHLDDAEPYLLTMAKKALKSESA 291
               SCOP domains d3bu8b_ B: TRF2                                                                                                                                                                                                 SCOP domains
               CATH domains 3bu8B00 B:43-249 Telomeric repeat binding factor (TRF) dimerisation domain                                                                                                                                      CATH domains
               Pfam domains --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author hhhhhhhhhhhhhhhhhhhhhhhhhhhh.hhhhhhhhhhhhhhhh......hhhhhhhhhhhhhhhhhhh..............hhhhhhhhhhhhhhhhh..hhhhhhhhhhhhhhhhhhhhhhh.hhhhhhhhhhhhh.....hhhhhhhhhhhhhhh...hhhhhh.hhhhhhhhhhhhhhh......hhhhhhhhhhh..... Sec.struct. author
                 SAPs(SNPs) --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- PROSITE
           Transcript 1 (1) 1-------------------------------Exon 1.3  PDB: B:75-118 UniProt: 117-160    Exon 1.4  PDB: B:119-147     Exon 1.5  PDB: B:148-196 UniProt: 190-238        Exon 1.6  PDB: B:197-232            ----------------- Transcript 1 (1)
           Transcript 1 (2) Exon 1.2  PDB: B:43-75           ------------------------------------------------------------------------------------------------------------------------------------------------------------Exon 1.7           Transcript 1 (2)
                 3bu8 B  43 AGEARLEEAVNRWVLKFYFHEALRAFRGSRYGDFRQIRDIMQALLVRPLGKEHTVSRLLRVMQCLSRIEEGENLDCSFDMEAELTPLESAINVLEMIKTEFTLTEAVVESSRKLVKEAAVIICIKNKEFEKASKILKKHMSKDPTTQKLRNDLLNIIREKNLAHPVIQNFSYETFQQKMLRFLESHLDDAEPYLLTMAKKALKSESA 249
                                    52        62        72        82        92       102       112       122       132       142       152       162       172       182       192       202       212       222       232       242       


Chain C from PDB  Type:PROTEIN  Length:15
 aligned with TINF2_HUMAN | Q9BSI4 from UniProtKB/Swiss-Prot  Length:451

    Alignment length:26
                                   255       265      
          TINF2_HUMAN   246 SRTHPEPLAGRHFNLAPLGRRRVQSQ 271
               SCOP domains -------------------------- SCOP domains
               CATH domains -------------------------- CATH domains
               Pfam domains -------------------------- Pfam domains
         Sec.struct. author .-----------......ee...... Sec.struct. author
                 SAPs(SNPs) -------------------------- SAPs(SNPs)
                    PROSITE -------------------------- PROSITE
               Transcript 2 Exon 2.6a UniProt: 202-354 Transcript 2
                 3bu8 C 257 S-----------FNLAPLGRRRVQSQ 271
                            |        -  |    265      
                          257         258             


Chain D from PDB  Type:PROTEIN  Length:10
 aligned with TINF2_HUMAN | Q9BSI4 from UniProtKB/Swiss-Prot  Length:451

    Alignment length:21
                                   255       265 
          TINF2_HUMAN   246 SRTHPEPLAGRHFNLAPLGRR 266
               SCOP domains --------------------- SCOP domains
               CATH domains --------------------- CATH domains
               Pfam domains --------------------- Pfam domains
         Sec.struct. author .-----------......... Sec.struct. author
                 SAPs(SNPs) --------------------- SAPs(SNPs)
                    PROSITE --------------------- PROSITE
               Transcript 2 Exon 2.6a             Transcript 2
                 3bu8 D 257 S-----------FNLAPLGRR 266
                            |        -  |    265 
                          257         258
   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  (1, 2)

Asymmetric Unit
(-)
Class: All alpha proteins (14657)

(-) CATH Domains  (1, 2)

Asymmetric Unit
(-)
Class: Mainly Alpha (13335)

(-) Pfam Domains  (0, 0)

(no "Pfam Domain" information available for 3BU8)

(-) Gene Ontology  (51, 64)

Asymmetric Unit(hide GO term definitions)
Chain A,B   (TERF2_HUMAN | Q15554)
molecular function
    GO:0003677    DNA binding    Any molecular function by which a gene product interacts selectively and non-covalently with DNA (deoxyribonucleic acid).
    GO:0098505    G-rich strand telomeric DNA binding    Interacting selectively and non-covalently with G-rich, single-stranded, telomere-associated DNA.
    GO:0003691    double-stranded telomeric DNA binding    Interacting selectively and non-covalently with double-stranded telomere-associated DNA.
    GO:0044877    macromolecular complex binding    Interacting selectively and non-covalently with any macromolecular complex.
    GO:0008022    protein C-terminus binding    Interacting selectively and non-covalently with a protein C-terminus, the end of any peptide chain at which the 1-carboxy function of a constituent amino acid is not attached in peptide linkage to another amino-acid residue.
    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:0042803    protein homodimerization activity    Interacting selectively and non-covalently with an identical protein to form a homodimer.
    GO:0003720    telomerase activity    Catalysis of the reaction: deoxynucleoside triphosphate + DNA(n) = diphosphate + DNA(n+1). Catalyzes extension of the 3'- end of a DNA strand by one deoxynucleotide at a time using an internal RNA template that encodes the telomeric repeat sequence.
    GO:0042162    telomeric DNA binding    Interacting selectively and non-covalently with a telomere, a specific structure at the end of a linear chromosome required for the integrity and maintenance of the end.
biological process
    GO:0007049    cell cycle    The progression of biochemical and morphological phases and events that occur in a cell during successive cell replication or nuclear replication events. Canonically, the cell cycle comprises the replication and segregation of genetic material followed by the division of the cell, but in endocycles or syncytial cells nuclear replication or nuclear division may not be followed by cell division.
    GO:0090398    cellular senescence    A cell aging process stimulated in response to cellular stress, whereby normal cells lose the ability to divide through irreversible cell cycle arrest.
    GO:1903770    negative regulation of beta-galactosidase activity    Any process that stops, prevents or reduces the frequency, rate or extent of beta-galactosidase activity.
    GO:2000773    negative regulation of cellular senescence    Any process that stops, prevents or reduces the frequency, rate or extent of cellular senescence.
    GO:0010629    negative regulation of gene expression    Any process that decreases the frequency, rate or extent of gene expression. Gene expression is the process in which a gene's coding sequence is converted into a mature gene product or products (proteins or RNA). This includes the production of an RNA transcript as well as any processing to produce a mature RNA product or an mRNA or circRNA (for protein-coding genes) and the translation of that mRNA or circRNA into protein. Protein maturation is included when required to form an active form of a product from an inactive precursor form.
    GO:1904430    negative regulation of t-circle formation    Any process that stops, prevents or reduces the frequency, rate or extent of t-circle formation.
    GO:1904354    negative regulation of telomere capping    Any process that stops, prevents or reduces the frequency, rate or extent of telomere capping.
    GO:0032205    negative regulation of telomere maintenance    Any process that stops, prevents, or reduces the frequency, rate or extent of a process that affects and monitors the activity of telomeric proteins and the length of telomeric DNA.
    GO:0032208    negative regulation of telomere maintenance via recombination    Any process that stops, prevents, or reduces the frequency, rate or extent of a recombinational process involved in the maintenance of proper telomeric length.
    GO:0032214    negative regulation of telomere maintenance via semi-conservative replication    Any process that stops, prevents, or reduces the frequency, rate or extent of the semi-conservative replication of telomeric DNA.
    GO:1903824    negative regulation of telomere single strand break repair    Any process that stops, prevents or reduces the frequency, rate or extent of telomere single strand break repair.
    GO:0010628    positive regulation of gene expression    Any process that increases the frequency, rate or extent of gene expression. Gene expression is the process in which a gene's coding sequence is converted into a mature gene product or products (proteins or RNA). This includes the production of an RNA transcript as well as any processing to produce a mature RNA product or an mRNA or circRNA (for protein-coding genes) and the translation of that mRNA or circRNA into protein. Protein maturation is included when required to form an active form of a product from an inactive precursor form.
    GO:0051000    positive regulation of nitric-oxide synthase activity    Any process that activates or increases the activity of the enzyme nitric-oxide synthase.
    GO:0032206    positive regulation of telomere maintenance    Any process that activates or increases the frequency, rate or extent of a process that affects and monitors the activity of telomeric proteins and the length of telomeric DNA.
    GO:0031848    protection from non-homologous end joining at telomere    A process that prevents non-homologous end joining at telomere, thereby ensuring that telomeres do not fuse.
    GO:0070198    protein localization to chromosome, telomeric region    Any process in which a protein is transported to, or maintained at, the telomeric region of a chromosome.
    GO:0032204    regulation of telomere maintenance    Any process that modulates the frequency, rate or extent of a process that affects and monitors the activity of telomeric proteins and the length of telomeric DNA.
    GO:0032210    regulation of telomere maintenance via telomerase    Any process that modulates the frequency, rate or extent of the addition of telomeric repeats by telomerase.
    GO:0016233    telomere capping    A process in which telomeres are protected from degradation and fusion, thereby ensuring chromosome stability by protecting the ends from both degradation and from being recognized as damaged DNA. May be mediated by specific single- or double-stranded telomeric DNA binding proteins.
    GO:0000723    telomere maintenance    Any process that contributes to the maintenance of proper telomeric length and structure by affecting and monitoring the activity of telomeric proteins, the length of telomeric DNA and the replication and repair of the DNA. These processes includes those that shorten, lengthen, replicate and repair the telomeric DNA sequences.
    GO:0007004    telomere maintenance via telomerase    The maintenance of proper telomeric length by the addition of telomeric repeats by telomerase.
    GO:0031627    telomeric loop formation    The process in which linear telomeric DNA is remodeled into duplex loops, by the invasion of a 3' single-stranded overhang into the duplex region.
cellular component
    GO:0005794    Golgi apparatus    A compound membranous cytoplasmic organelle of eukaryotic cells, consisting of flattened, ribosome-free vesicles arranged in a more or less regular stack. The Golgi apparatus differs from the endoplasmic reticulum in often having slightly thicker membranes, appearing in sections as a characteristic shallow semicircle so that the convex side (cis or entry face) abuts the endoplasmic reticulum, secretory vesicles emerging from the concave side (trans or exit face). In vertebrate cells there is usually one such organelle, while in invertebrates and plants, where they are known usually as dictyosomes, there may be several scattered in the cytoplasm. The Golgi apparatus processes proteins produced on the ribosomes of the rough endoplasmic reticulum; such processing includes modification of the core oligosaccharides of glycoproteins, and the sorting and packaging of proteins for transport to a variety of cellular locations. Three different regions of the Golgi are now recognized both in terms of structure and function: cis, in the vicinity of the cis face, trans, in the vicinity of the trans face, and medial, lying between the cis and trans regions.
    GO:0030870    Mre11 complex    Trimeric protein complex that possesses endonuclease activity; involved in meiotic recombination, DNA repair and checkpoint signaling. In Saccharomyces cerevisiae, the complex comprises Mre11p, Rad50p, and Xrs2p; complexes identified in other species generally contain proteins orthologous to the Saccharomyces cerevisiae proteins.
    GO:0005694    chromosome    A structure composed of a very long molecule of DNA and associated proteins (e.g. histones) that carries hereditary information.
    GO:0000781    chromosome, telomeric region    The terminal region of a linear chromosome that includes the telomeric DNA repeats and associated proteins.
    GO:0005737    cytoplasm    All of the contents of a cell excluding the plasma membrane and nucleus, but including other subcellular structures.
    GO:0000784    nuclear chromosome, telomeric region    The terminal region of a linear nuclear chromosome that includes the telomeric DNA repeats and associated proteins.
    GO:0000783    nuclear telomere cap complex    A complex of DNA and protein located at the end of a linear chromosome in the nucleus that protects and stabilizes a linear chromosome.
    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:0070187    shelterin complex    A nuclear telomere cap complex that is formed by the association of telomeric ssDNA- and dsDNA-binding proteins with telomeric DNA, and is involved in telomere protection and recruitment of telomerase. The complex is known to contain TERF1, TERF2, POT1, RAP1, TINF2 and ACD in mammalian cells, and Pot1, Tpz1, Rap1, Rif1, Rif2 and Taz1 in Schizosaccharomyces. Taz1 and Rap1 (or their mammalian equivalents) form a dsDNA-binding subcomplex, Pot1 and Tpz1 form an ssDNA-binding subcomplex, and the two subcomplexes are bridged by Poz1, which acts as an effector molecule along with Ccq1.

Chain C,D   (TINF2_HUMAN | Q9BSI4)
molecular function
    GO:0003677    DNA binding    Any molecular function by which a gene product interacts selectively and non-covalently with DNA (deoxyribonucleic 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:0010521    telomerase inhibitor activity    Stops, prevents or reduces the activity of a telomerase. Telomerase catalyzes the reaction: deoxynucleoside triphosphate + DNA(n) = diphosphate + DNA(n+1). Catalyzes extension of the 3'- end of a DNA strand by one deoxynucleotide at a time using an internal RNA template that encodes the telomeric repeat sequence.
    GO:0042162    telomeric DNA binding    Interacting selectively and non-covalently with a telomere, a specific structure at the end of a linear chromosome required for the integrity and maintenance of the end.
biological process
    GO:0050680    negative regulation of epithelial cell proliferation    Any process that stops, prevents or reduces the rate or extent of epithelial cell proliferation.
    GO:0010836    negative regulation of protein ADP-ribosylation    Any process that decreases the frequency, rate or extent of protein ADP-ribosylation. Protein ADP-ribosylation is the transfer, from NAD, of ADP-ribose to protein amino acids.
    GO:0051974    negative regulation of telomerase activity    Any process that stops or reduces the activity of the enzyme telomerase, which catalyzes of the reaction: deoxynucleoside triphosphate + DNA(n) = diphosphate + DNA(n+1).
    GO:0032211    negative regulation of telomere maintenance via telomerase    Any process that stops, prevents, or reduces the frequency, rate or extent of the addition of telomeric repeats by telomerase.
    GO:0032206    positive regulation of telomere maintenance    Any process that activates or increases the frequency, rate or extent of a process that affects and monitors the activity of telomeric proteins and the length of telomeric DNA.
    GO:0034502    protein localization to chromosome    Any process in which a protein is transported to, or maintained at, a specific location on a chromosome.
    GO:0070198    protein localization to chromosome, telomeric region    Any process in which a protein is transported to, or maintained at, the telomeric region of a chromosome.
    GO:0032202    telomere assembly    A cellular process that results in the aggregation, arrangement and bonding together of a set of components to form a telomere at a non-telomeric double-stranded DNA end. A telomere is a terminal region of a linear chromosome that includes telomeric DNA repeats and associated proteins.
    GO:0016233    telomere capping    A process in which telomeres are protected from degradation and fusion, thereby ensuring chromosome stability by protecting the ends from both degradation and from being recognized as damaged DNA. May be mediated by specific single- or double-stranded telomeric DNA binding proteins.
    GO:0010833    telomere maintenance via telomere lengthening    Any process that contributes to the maintenance of proper telomeric length and structure by affecting and monitoring the activity of telomeric proteins and lengthening the telomeric DNA.
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:0000781    chromosome, telomeric region    The terminal region of a linear chromosome that includes the telomeric DNA repeats and associated proteins.
    GO:0000784    nuclear chromosome, telomeric region    The terminal region of a linear nuclear chromosome that includes the telomeric DNA repeats and associated proteins.
    GO:0016363    nuclear matrix    The dense fibrillar network lying on the inner side of the nuclear membrane.
    GO:0000783    nuclear telomere cap complex    A complex of DNA and protein located at the end of a linear chromosome in the nucleus that protects and stabilizes a linear chromosome.
    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:0010370    perinucleolar chromocenter    A chromocenter adjacent to the nucleolus.
    GO:0070187    shelterin complex    A nuclear telomere cap complex that is formed by the association of telomeric ssDNA- and dsDNA-binding proteins with telomeric DNA, and is involved in telomere protection and recruitment of telomerase. The complex is known to contain TERF1, TERF2, POT1, RAP1, TINF2 and ACD in mammalian cells, and Pot1, Tpz1, Rap1, Rif1, Rif2 and Taz1 in Schizosaccharomyces. Taz1 and Rap1 (or their mammalian equivalents) form a dsDNA-binding subcomplex, Pot1 and Tpz1 form an ssDNA-binding subcomplex, and the two subcomplexes are bridged by Poz1, which acts as an effector molecule along with Ccq1.

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

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        TERF2_HUMAN | Q15554: 1h6p 1vf9 1vfc 1w0u 1xg1 3bua 3k6g 3sjm 4m7c 4rqi 5wqd
        TINF2_HUMAN | Q9BSI4: 3bqo

(-) Related Entries Specified in the PDB File

3bqo 3bua