Now showing items 1-16 of 16

    • Análisis digital de imágenes obtenidas con el microscopio electrónico 

      Subirana Torrent, Juan A.; Muñoz Guerra, Sebastián; Martínez Velasco, Antonio Benito; Fita Rodríguez, Ignacio (Universitat Politècnica de Barcelona, 1980-12)
      Conference report
      Open Access
      Se describe la metodología utilizada en el tratamiento digital de fotografías de fibras de cro­matina obtenidas con la ayuda del microscopio elec­trónico, El método consiste básicamente en un filtra­do de paso bajo y otro ...
    • Coiled-coil conformation of a pentamidine-DNA complex 

      Moreno Chicano, Tadeo; Pous, Joan; Subirana Torrent, Juan A.; Campos López, Josefina de Lourdes (2010-03)
      Article
      Restricted access - publisher's policy
      The coiled-coil structure formed by the complex of the DNA duplex d(ATATATATAT)2 with pentamidine is presented. The duplex was found to have a mixed structure containing Watson-Crick and Hoogsteen base pairs. The drug ...
    • Crystal structure of a complex of DNA with one AT-hook of HMGA1 

      Fonfria Subirós, Elsa; Acosta Reyes, Francisco Javier; Saperas Plana, Núria; Pous, Joan; Subirana Torrent, Juan A.; Campos López, Josefina de Lourdes (2012-05-16)
      Article
      Open Access
      We present here for the first time the crystal structure of an AT-hook domain. We show the structure of an AT-hook of the ubiquitous nuclear protein HMGA1, combined with the oligonucleotide d(CGAATTAATTCG)2, which has two ...
    • DNA coiled coil superstructures in oligonucleotide crystals 

      Luchi, Daniela de; Urpí Garriga, Lourdes; Subirana Torrent, Juan A.; Campos López, Josefina de Lourdes (American Chemical Society (ACS), 2011-05-04)
      Article
      Restricted access - publisher's policy
      We present the structure of coiled coils found in two oligonucleotide DNA crystals. The sequences d-(ATATATATAT) and d(CGATATATAT) are used. In the first case several coiled coils with different structures are found. In ...
    • Dna satellites are transcribed as part of the non-coding genome in eukaryotes and bacteria 

      Subirana Torrent, Juan A.; Messeguer Peypoch, Xavier (2021-10-20)
      Article
      Open Access
      It has been shown in recent years that many repeated sequences in the genome are expressed as RNA transcripts, although the role of such RNAs is poorly understood. Some isolated and tandem repeats (satellites) have been ...
    • Dr. D. Juan A. Subirana : Medio siglo investigando : los orígenes 

      Subirana Torrent, Juan A. (Instituto de España, 2012)
      Part of book or chapter of book
      Open Access
      Ressenya autobiogràfica
    • Evolution of tandem repeat satellite sequences in two closely related caenorhabditis species: Diminution of satellites in hermaphrodites 

      Subirana Torrent, Juan A.; Messeguer Peypoch, Xavier (2017-12-01)
      Article
      Open Access
      The availability of the genome sequence of the unisexual (male-female) Caenorhabditis nigoni offers an opportunity to compare its non-coding features with the related hermaphroditic species Caenorhabditis briggsae; to ...
    • High evolutionary turnover of satellite families in Caenorhabditis 

      Subirana Torrent, Juan A.; Albà, M. Mar; Messeguer Peypoch, Xavier (2015-10-05)
      Article
      Open Access
      Background: The high density of tandem repeat sequences (satellites) in nematode genomes and the availability of genome sequences from several species in the group offer a unique opportunity to better understand the ...
    • How long are long tandem repeats? A challenge for current methods of whole-genome sequence assembly: The case of satellites in caenorhabditis elegans 

      Subirana Torrent, Juan A.; Messeguer Peypoch, Xavier (2018-10-16)
      Article
      Open Access
      Repetitive genome regions have been difficult to sequence, mainly because of the comparatively small size of the fragments used in assembly. Satellites or tandem repeats are very abundant in nematodes and offer an excellent ...
    • Long non-coding RNAs as a source of new peptides 

      Ruiz Orera, Jorge; Messeguer Peypoch, Xavier; Subirana Torrent, Juan A.; Albà Soler, M. Mar (2014-09-16)
      Article
      Open Access
      Deep transcriptome sequencing has revealed the existence of many transcripts that lack long or conserved open reading frames (ORFs) and which have been termed long non-coding RNAs (lncRNAs). The vast majority of lncRNAs ...
    • Satellites in the prokaryote world 

      Subirana Torrent, Juan A.; Messeguer Peypoch, Xavier (2019-09-18)
      Article
      Open Access
      Background Satellites or tandem repeats are very abundant in many eukaryotic genomes. Occasionally they have been reported to be present in some prokaryotes, but to our knowledge there is no general comparative study ...
    • Tandem repeats in Bacillus: Unique features and taxonomic distribution 

      Subirana Torrent, Juan A.; Messeguer Peypoch, Xavier (2021-05-20)
      Article
      Open Access
      Little is known about DNA tandem repeats across prokaryotes. We have recently described an enigmatic group of tandem repeats in bacterial genomes with a constant repeat size but variable sequence. These findings strongly ...
    • The influence of Ni2+ and other ions on the trigonal structure of DNA 

      Acosta Reyes, Francisco Javier; Pagan, Mireia; Fonfría-Subirós, Elsa; Saperas Plana, Núria; Subirana Torrent, Juan A.; Campos López, Josefina de Lourdes (Wiley, 2021-04-13)
      Article
      Open Access
      We present a new structure of a DNA dodecamer obtained in the presence of Ni2+ ions. The DNA forms Ni-guanine cross-links between neighboring molecules. Our results show that an adequate dosage of Ni2+ may help to form ...
    • Unique features of satellite DNA transcription in different tissues of Caenorhabditis elegans 

      Subirana Torrent, Juan A.; Messeguer Peypoch, Xavier (2023-02-03)
      Article
      Open Access
      A large part of the genome is known to be transcribed as non-coding DNA including some tandem repeats (satellites) such as telomeric/centromeric satellites in different species. However, there has been no detailed study ...
    • Unique features of tandem repeats in bacteria 

      Subirana Torrent, Juan A.; Messeguer Peypoch, Xavier (2020-08-24)
      Article
      Restricted access - publisher's policy
      DNA tandem repeats, or satellites, are well described in eukaryotic species, but little is known about their prevalence across prokaryotes. Here, we performed the most complete characterization to date of satellites in ...
    • Visualization of sequence and structural features of genomes and chromosome fragments. Application to CpG islands, Alu sequences and whole genomes 

      Subirana Torrent, Juan A.; Anokian, Ezequiel (2011-03-01)
      Article
      Restricted access - publisher's policy
      A very simple new program is presented (G-SQUARES). It is useful in order to visualize the composition and basic structural features of whole genomes and selected chromosome regions. The frequency of all dimer and tetramer ...