Library

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Electronic Resource
    Electronic Resource
    HYPOTHESIS: CYTOTOXIC LYMPHOCYTE GRANULE SERINE PROTEASES ACTIVATE TARGET CELL ENDONUCLEASES TO TRIGGER APOPTOSIS (1994)
    Oxford, UK : Blackwell Publishing Ltd
    Clinical and experimental pharmacology and physiology 21 (1994), S. 0 
    Details
    ISSN: 1440-1681
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Upon interaction with target cells, cytotoxic T lymphocytes and natural killer cells vectorially secrete highly specialized cytoplasmic granules containing perforin and a family of serine proteases (granzymes). This granule exocytosis mechanism of cytolysis is of patho-physiological importance, and usually results in target cell DNA fragmentation. Neither perforin nor granzymes possess inherent nuclease activity, but in combination they can induce target cell apoptosis. Perforin forms transmembrane pores in the target cell, thereby enabling granzymes to access target cell substrates. The target cell substrates of granzymes are unknown, but granzyme A binding and cleavage of the nuclear shuttle protein nucleolin in target cells demonstrates that granzymes may act on nuclear substrates. Furthermore, the presence of granzyme B and other granzyme activities in the nucleus of cytotoxic lymphocytes indicates that granzymes can be transported from the cytoplasm to the nucleus.It is hypothesized that perforin enables effector granzymes to enter the target cell cytoplasm and following their transport into the nucleus, granzymes cleave specific target cell nuclear proteins to activate autolytic endonucleases that fragment DNA. In cytotoxic effectors, these nuclear substrates are normally protected from granzymes by endogenous inhibitors.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1440-1681.1994.tb02438.x
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Cloning and expression of the recombinant mouse natural killer cell granzyme Met-ase-1 (1996)
    Springer
    Immunogenetics 44 (1996), S. 340-350 
    Details
    ISSN: 1432-1211
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract  Met-ase-1 is a 30 000 M r serine protease (granzyme) that was first isolated in the cytolytic granules of rat CD3– large granular lymphocytes. We screened a mouse genomic library with rat Met-ase-1 cDNA, and obtained bacteriophage clones that contained the mouse Met-ase-1 gene. The mouse Met-ase-1 gene comprises five exons spanning approximately 5.2 kilobases (kb) and exhibits a similar structural organization to its rat homologue and a family of neutrophil elastase-like serine proteases. Mouse Met-ase-1 mRNA was only detected in total cellular and poly A mRNA of mouse CD3– GM1+ large granular lymphocytes derived from splenocytes stimulated with IL-2 and the mouse NK1.1+ cell line 4 – 16. Spleen T-cell populations generated by Concanavalin A stimulation and a number of mouse pre-NK and T cell lines did not express mouse Met-ase-1 mRNA. The 5′ flanking region of the mouse Met-ase-1 gene also shares considerable regions of identity with the 5′ flanking region of the rat Met-ase-1 gene. A 3.3 kb segment of 5′ sequence flanking the mouse Met-ase-1 gene was inserted upstream of the chloramphenicol acetyltransferase reporter gene and this construct transiently transfected into a variety of mouse and rat large granular lymphocyte leukemia and T-cell lines. The transcriptional activity of the mouse Met-ase-1 5′ flanking region was significant in the RNK-16 large granular lymphocyte leukemia, strongest in the 4 – 16 mouse NK1.1+ cell line, and weak in several mouse pre-NK cell lines. Reverse transcriptase polymerase chain reaction of mouse large granular lymphocyte mRNA was used to derive the full-length coding sequence for mouse Met-ase-1. The predicted hexapropeptide of mouse Met-ase-1 (Asn–6 to Gln–1), was deleted by polymerase chain reaction mutagenesis to enable expression of active mouse Met-ase-1 in mammalian COS-7 cells. Northern blot analysis and protease assays of transfected COS cell lysates against a panel of thiobenzyl ester substrates formally demonstrated that the mouse Met-ase-1 gene encodes a serine proteinase that hydrolyzes substrates containing a long narrow hydrophobic amino acids like methionine, norleucine, and leucine in the P1.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002510050135
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Cloning and characterization of a novel NK cell-specific serine protease gene and its functional 5′-flanking sequences (1995)
    Springer
    Immunogenetics 42 (1995), S. 101-111 
    Details
    ISSN: 1432-1211
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract Rat natural killer cell Met-ase-1 (RNK-Met-1) is a 30 000 M r serine protease (granzyme) found in the cytolytic granules of CD3- large granular lymphocytes (LGL) with natural killer (NK) activity. To characterize the genomic sequences responsible for the CD3- LGL-restricted expression of this gene, we screened a rat genomic library with RNK-Met-1 cDNA, and obtained bacteriophage clones that contained the RNK-Met-1 gene. The RNK-Met-1 gene comprises 5 exons and spans approximately 5.2 kilobases (kb), exhibiting a similar structural organization to a class of CTL-serine proteases with protease catalytic residues encoded near the borders of exons 2, 3, and 5. The 5′-flanking region of the RNK-Met-1 gene contains a number of putative promoter and enhancer regulatory elements and shares several regions of homology with the 5′-flanking region of the mouse perforin gene. We have prepared nested deletions from approximately 3.3 kb of the 5′-flanking region of the RNK-Met-1 gene, and inserted these upstream of the chloramphenicol acetyltransferase (CAT) reporter gene. These 5′-flanking RNK-Met-1-CAT constructs were transiently transfected into rat LGL leukemia, T-lymphoma, and basophilic leukemia cell lines.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00178584
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    The natural killer cell serine protease gene Lmet1 maps to mouse chromosome 10 (1995)
    Springer
    Immunogenetics 41 (1995), S. 47-49 
    Details
    ISSN: 1432-1211
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00188433
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...