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Related Experiment Videos

[Nuclear ribonucleoproteins containing pro-mRNA. XIV. Structural study using ethidium and fluorescamine].

O F Borisova, A A Krichevskaia, V V Prosvirnin

    Molekuliarnaia Biologiia
    |March 1, 1979
    PubMed
    Summary

    Fluorescence techniques reveal that fluorescamin labels protein NH2-groups in 30S RNP particles. Double-stranded pre-mRNA regions, bound to proteins, extend from the particle, with their accessibility changing under varying salt concentrations.

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    [Complexes of telomeric oligonucleotide d(TTAGGG)4 with the new recombinant protein PGEk--nucleic acid carrier into proliferating cells].

    Molekuliarnaia biologiia·2006

    Area of Science:

    • Biochemistry and Molecular Biology
    • Biophysical Chemistry
    • Structural Biology

    Context:

    • Ribonucleoprotein (RNP) particles are fundamental to gene expression, involving interactions between RNA and proteins.
    • Understanding the structural organization and dynamics of RNP particles is crucial for deciphering their functions.
    • Fluorescence techniques offer sensitive methods for probing molecular interactions and structures within biological complexes.

    Purpose:

    • To investigate the structural and dynamic properties of nuclear 30S RNP particles using fluorescence spectroscopy.
    • To characterize the interaction of fluorescamin with protein components and ethidium bromide with pre-mRNA.
    • To determine the accessibility and structural state of pre-mRNA within 30S RNP particles under varying conditions.

    Summary:

    Related Experiment Videos

    • Fluorescamin covalently labels protein NH2-groups in 30S RNP particles, forming fluorescent complexes with distinct quantum yields and lifetimes.
    • Energy transfer measurements indicate that double-stranded pre-mRNA regions are associated with proteins and protrude from the RNP particle.
    • Increased salt concentration dissociates protein subunits, increasing the accessibility of pre-mRNA and altering the structure of RNP particles.

    Impact:

    • Provides insights into the specific binding sites and conformational states of proteins within 30S RNP particles.
    • Quantifies the extent of double-stranded pre-mRNA and its structural relationship with proteins in RNP complexes.
    • Demonstrates the dynamic nature of RNP structure and the influence of ionic strength on RNA-protein interactions.