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Related Concept Videos

Repressible Operon: trp Operon01:21

Repressible Operon: trp Operon

The trp operon in Escherichia coli exemplifies a repressible operon. It regulates the synthesis of tryptophan through repressor-mediated transcriptional control and attenuation. This dual regulatory mechanism ensures tryptophan biosynthesis occurs only when needed, conserving cellular resources.Structure of the trp OperonThe trp operon consists of five structural genes (trpE, trpD, trpC, trpB, and trpA) that encode enzymes for tryptophan biosynthesis. These genes are transcribed as a single...
Cotranslational Protein Translocation01:20

Cotranslational Protein Translocation

Translocation of proteins across membranes is an ancient process that occurs even in bacteria and archaebacteria. In fact, the components of the translocation machinery are still conserved between prokaryotes and eukaryotes.
Sec61 channel partners for cotranslational translocation
During cotranslational translocation, the Sec61 channel partners with the signal recognition particle (SRP), the signal recognition particle receptor (SR), and the ribosomes to transport the nascent polypeptide chain...
LTR Retrotransposons03:08

LTR Retrotransposons

LTR retrotransposons are class I transposable elements with long terminal repeats flanking an internal coding region. These elements are less abundant in mammals compared to other class I transposable elements. About 8 percent of human genomic DNA comprises LTR retrotransposons. Some of the common examples of LTR retrotransposons are Ty elements in yeast and Copia elements in Drosophila.
The internal coding region of LTR retrotransposons and their mechanism of transposition closely resembles a...
Thermosensation01:43

Thermosensation

Peripheral thermosensation is the perception of external temperature. A change in temperature (on the surface of the skin and other tissues) is detected by a family of temperature-sensitive ion channels called Transient Receptor Potential, or TRP, receptors. These receptors are located on free nerve endings. Those detecting cold temperatures are closer to the surface of the skin than the nerve endings detecting warmth. These thermoTRP channels, while temperature selective, have relatively...
Directing Proteins to the Rough Endoplasmic Reticulum01:34

Directing Proteins to the Rough Endoplasmic Reticulum

The organelle-specific signaling sequences direct proteins synthesized in the cytosol to their final destination like ER, mitochondria, peroxisomes, etc. Some of the proteins directed to ER are then trafficked via vesicles to other organelles within the cell or the extracellular environment through the Golgi complex. For example, the rough ER synthesizes soluble proteins for transportation to the lysosomes or secretion out of the cell. It can also synthesize transmembrane proteins that can...
Transcription Attenuation in Prokaryotes02:42

Transcription Attenuation in Prokaryotes

Transcriptional attenuation occurs when RNA transcription is prematurely terminated due to the formation of a terminator mRNA hairpin structure.  Bacteria use these hairpins to regulate the transcription process and control the synthesis of several amino acids including histidine, lysine, threonine, and phenylalanine. Transcription attenuation takes place in the non-coding regions of mRNA.
There are several different mechanisms used to attenuate transcription. In ribosome mediated...

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Related Experiment Video

Updated: Jun 4, 2026

TRAP-rc, Translating Ribosome Affinity Purification from Rare Cell Populations of Drosophila Embryos
10:26

TRAP-rc, Translating Ribosome Affinity Purification from Rare Cell Populations of Drosophila Embryos

Published on: September 10, 2015

TRPML1.

Grace A Colletti1, Kirill Kiselyov

  • 1Department of Biological Sciences, University of Pittsburgh, Pittsburgh, PA 15260, USA. gac13@pitt.edu

Advances in Experimental Medicine and Biology
|February 4, 2011
PubMed
Summary
This summary is machine-generated.

Transient Receptor Potential Mucolipin-1 (TRPML1) channels are crucial for endocytic pathway function. Mutations cause mucolipidosis type IV (MLIV), highlighting TRPML1

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Expression and Purification of the Human Lipid-sensitive Cation Channel TRPC3 for Structural Determination by Single-particle Cryo-electron Microscopy
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Expression and Purification of the Human Lipid-sensitive Cation Channel TRPC3 for Structural Determination by Single-particle Cryo-electron Microscopy

Published on: January 7, 2019

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TRAP-rc, Translating Ribosome Affinity Purification from Rare Cell Populations of Drosophila Embryos
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Expression and Purification of the Human Lipid-sensitive Cation Channel TRPC3 for Structural Determination by Single-particle Cryo-electron Microscopy
08:27

Expression and Purification of the Human Lipid-sensitive Cation Channel TRPC3 for Structural Determination by Single-particle Cryo-electron Microscopy

Published on: January 7, 2019

Area of Science:

  • Cell Biology
  • Molecular Biology
  • Ion Channel Physiology

Background:

  • Transient Receptor Potential Mucolipin-1 (TRPML1) is an ion channel located in lysosomes.
  • Mutations in the TRPML1 gene (MCOLN1) cause mucolipidosis type IV (MLIV), a lysosomal storage disease.
  • TRPML1's function in the endocytic pathway is critical but not fully understood.

Purpose of the Study:

  • To review recent developments in identifying the specific functions of TRPML1 in the endocytic pathway.
  • To explore TRPML1's role in lysosomal storage diseases and cellular processes.
  • To discuss potential therapeutic targets related to TRPML1.

Main Methods:

  • Literature review of recent research on TRPML1.
  • Analysis of TRPML1's proposed roles in membrane fusion and ion homeostasis.
  • Examination of MLIV pathogenesis and its connection to TRPML1 dysfunction.

Main Results:

  • TRPML1 is essential for the proper functioning of the lower endocytic pathway.
  • Potential roles include mediating Ca(2+) release for membrane fusion and regulating lysosomal ion balance (pH, iron).
  • Understanding TRPML1 is key to deciphering MLIV pathogenesis and cellular integrative functions.

Conclusions:

  • TRPML1 plays a vital role in endosomal trafficking and lysosomal function.
  • Further research into TRPML1 mechanisms can advance understanding of lysosomal storage diseases and cellular processes.
  • TRPML1 modulators may offer novel therapeutic strategies for MLIV and related conditions.