相关实验视频

Updated: May 12, 2026

In Vitro Transcription Assays and Their Application in Drug Discovery
09:28

In Vitro Transcription Assays and Their Application in Drug Discovery

Published on: September 20, 2016

有证据表明,核酸序列"boxA"参与了NusaA蛋白的作用

D I Friedman, E R Olson

    Cell
    |August 1, 1983
    PubMed
    概括

    菌体兰巴的新突变boxA1揭示了boxA序列对于宿主因子NusaA来说至关重要,使转录成为可能. 这一发现对于理解菌体与宿主相互作用和基因调节至关重要.

    更多相关视频

    An Assay for Quantifying Protein-RNA Binding in Bacteria07:02

    An Assay for Quantifying Protein-RNA Binding in Bacteria

    Published on: June 12, 2019

    In Vivo Proximity Biotinylation for Protein Interaction Studies in Paramecium tetraurelia06:43

    In Vivo Proximity Biotinylation for Protein Interaction Studies in Paramecium tetraurelia

    Published on: September 12, 2025

    相关概念视频

    Protein Complexes with Interchangeable Parts01:57

    Protein Complexes with Interchangeable Parts

    Groups of proteins may form a complex where each protein in this complex has a different role in the overall execution of the complex’s function. Often some of the proteins in the complex can be replaced by a closely related variant to give a complex that contains many of the same components yet is functionally distinct.
    The SCF ubiquitin ligase is a protein complex of five individual proteins. This complex attaches ubiquitin to other target proteins to mark them for degradation. In order to...
    Nuclear Protein Sorting01:34

    Nuclear Protein Sorting

    Nuclear protein sorting is the selective trafficking of histones, polymerases, gene regulatory proteins into the nucleus and exporting RNAs and ribosomes to the cytosol. It is a tightly controlled process that regulates gene expression within a cell.
    Proteins targeted to the nucleus carry nuclear localization signals or NLS recognized by import receptors in the cytosol. Similarly, proteins with nuclear export signals are recognized by export receptors. Import and export receptors are...
    Nuclear Localization Signals and Import01:46

    Nuclear Localization Signals and Import

    Proteins targeted to the nucleus carry short stretches of amino acid sequences called the nuclear localization signal or NLS. Classical nuclear localization signals are of two types: monopartite and bipartite NLS. Monopartite classical NLS (cNLS) consists of a single cluster of 4-8 amino acids. Bipartite cNLS consists of two clusters of  2-3 amino acids and a 9-12 residue long proline-rich linker bridging the two clusters. Signal clusters are rich in positively charged amino acids such as...
    Regulation of Nuclear Protein Sorting01:45

    Regulation of Nuclear Protein Sorting

    Nuclear protein sorting regulates nucleus composition and gene expression, crucial for determining the fate of a eukaryotic cell. Hence, the entry and exit of molecules across the nuclear envelope is a tightly controlled process. Nuclear protein sorting can be inhibited by one of the following ways: 1) masking cargo signal sequences, 2) modifying the nuclear receptor's affinity for cargo, 3) controlling the nuclear pore size, 4) retaining the cargo during its transit to the cytosol or the...
    Allosteric Proteins-ATCase01:19

    Allosteric Proteins-ATCase

    Binding sites linkages can regulate a protein's function.  For example, enzyme activity is often regulated through a feedback mechanism where the end product of the biochemical process serves as an inhibitor.
    Aspartate transcarbamoylase (ATCase) is a cytosolic enzyme that catalyzes the condensation of L-aspartate and carbamoyl phosphate to  N-carbamoyl-L-aspartate. This reaction is the first step in pyrimidine biosynthesis. UTP and CTP, the end products of the pyrimidine synthesis pathway,...
    Nucleoid01:24

    Nucleoid

    The nucleoid represents a structurally and functionally distinct region within prokaryotic cells, where the cell's DNA and associated proteins are housed. Unlike eukaryotic cells, prokaryotes lack a membrane-bound nucleus, and the nucleoid facilitates the organization and accessibility of the genetic material within this constraint. The DNA in most bacteria and archaea exists as a single, circular, double-stranded molecule that is highly compacted through supercoiling and interactions with...