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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...
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Splicing is the process by which eukaryotic RNA is edited before its translation into protein. The RNA strand transcribed from eukaryotic DNA is called the primary transcript. The primary transcripts that become mRNAs are called precursor messenger RNAs (pre-mRNAs). Eukaryotic pre-mRNA contains alternating sequences of exons and introns. Exons are nucleotide sequences that code for proteins, whereas introns are the non-coding regions. In RNA splicing, introns are removed and exons are bonded...
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Alternative RNA Splicing02:18

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Alternative RNA splicing is the regulated splicing of exons and introns to produce different mature mRNAs from a single pre-mRNA. Unlike in constitutive splicing where a single gene produces a single type of mRNA, alternative splicing allows an organism to produce multiple proteins from a single gene and plays an important role in protein diversity.
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In eukaryotic cells, nascent mRNA transcripts need to undergo many post-transcriptional modifications to reach the cell cytoplasm and translate into functional proteins. For a long time, transcription and pre-mRNA processing were considered two independent events that occur sequentially in the cell. However, it has now been well established that transcription and pre-mRNA processing are two simultaneous processes that are precisely regulated inside the cell.
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Related Experiment Video

Updated: Jun 11, 2025

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The syntaxin-binding protein STXBP5 regulates progerin expression.

Hongqian Qi1,2, Yingying Wu3,4, Weiyu Zhang5

  • 1State Key Laboratory of Medicinal Chemical Biology, Nankai University, Tianjin, 300350, China.

Scientific Reports
|October 8, 2024
PubMed
Summary
This summary is machine-generated.

Syntaxin Binding Protein 5 (STXBP5) influences Hutchinson-Gilford progeria syndrome (HGPS) by affecting progerin expression and cellular senescence. Decreasing STXBP5 offers a potential therapeutic strategy for HGPS-related aging phenotypes.

Keywords:
Cellular senescenceLamin AProgerinSTXBP5

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Area of Science:

  • Molecular Biology
  • Genetics
  • Cellular Aging Research

Background:

  • Hutchinson-Gilford progeria syndrome (HGPS) results from Lamin A mutations, leading to progerin accumulation.
  • Progerin accumulation triggers cellular senescence, inflammation, and P53 pathway activation.

Purpose of the Study:

  • To identify factors influencing progerin expression in HGPS.
  • To investigate the role of Syntaxin Binding Protein 5 (STXBP5) in HGPS pathogenesis.
  • To explore STXBP5 as a potential therapeutic target for HGPS.

Main Methods:

  • Public dataset analysis to identify influencing factors.
  • Bioinformatics analysis of signaling pathways (MAPK, Hippo, IL17).
  • Protein co-immunoprecipitation (Co-IP) to confirm protein-protein interactions.

Main Results:

  • STXBP5 was identified as a key factor in progerin expression.
  • STXBP5 overexpression accelerated senescence; STXBP5 deletion delayed it and reduced senescence markers.
  • STXBP5 directly binds to progerin, exhibiting synergistic effects.
  • STXBP5 affects aging-related pathways and transposable elements like HERVH-int.

Conclusions:

  • STXBP5 plays a significant role in HGPS pathophysiology by modulating progerin expression and senescence.
  • Targeting STXBP5 presents a promising therapeutic avenue for mitigating aging phenotypes in HGPS patients.