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Related Concept Videos

Transcription01:10

Transcription

Overview
Transcription is the process of synthesizing RNA from a DNA sequence by RNA polymerase. It is the first step in producing a protein from a gene sequence. Additionally, many other proteins and regulatory sequences are involved in the proper synthesis of messenger RNA (mRNA). Regulation of transcription is responsible for the differentiation of all the different types of cells and often for the proper cellular response to environmental signals.
Transcription Can Produce Different Kinds...
Transcription01:10

Transcription

Overview
Transcription is the process of synthesizing RNA from a DNA sequence by RNA polymerase. It is the first step in producing a protein from a gene sequence. Additionally, many other proteins and regulatory sequences are involved in the proper synthesis of messenger RNA (mRNA). Regulation of transcription is responsible for the differentiation of all the different types of cells and often for the proper cellular response to environmental signals.
Transcription Can Produce Different Kinds...
Transcription Initiation01:47

Transcription Initiation

Initiation is the first step of transcription in eukaryotes. Prokaryotic RNA Polymerase (RNAP) can bind to the template DNA and start transcribing. On the other hand, transcription in eukaryotes requires additional proteins, called transcription factors, to first bind to the promoter region in the DNA template. This binding helps recruit the specific RNAP that can assemble on the DNA and start transcription.
The promoters and enhancers and their accessory proteins allow tight regulation of...
Transcription01:17

Transcription

Transcription is the synthesis of RNA from a DNA sequence by RNA polymerase. It is the first step in producing a protein from a gene sequence. Additionally, many other proteins and regulatory sequences are involved in correctly synthesizing messenger RNA (mRNA). Transcriptional regulation is responsible for the differentiation of different types of cells and often for the proper cellular response to environmental signals.
Transcription Can Produce Different Kinds of RNA Molecules
In eukaryotes,...
Initiation of Translation02:33

Initiation of Translation

Initiating translation is complex because it involves multiple molecules. Initiator tRNA, ribosomal subunits, and eukaryotic initiation factors (eIFs) are all required to assemble on the initiation codon of mRNA. This process consists of several steps that are mediated by different eIFs.
First, the initiator tRNA must be selected from the pool of elongator tRNAs by eukaryotic initiation factor 2 (eIF2). The initiator tRNA (Met-tRNAi) has conserved sequence elements including modified bases at...
Transcription01:17

Transcription

Transcription is the synthesis of RNA from a DNA sequence by RNA polymerase. It is the first step in producing a protein from a gene sequence. Additionally, many other proteins and regulatory sequences are involved in correctly synthesizing messenger RNA (mRNA). Transcriptional regulation is responsible for the differentiation of different types of cells and often for the proper cellular response to environmental signals.
Transcription Can Produce Different Kinds of RNA Molecules
In eukaryotes,...

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Related Experiment Video

Updated: Jun 6, 2026

Transcriptome Analysis of Single Cells
07:27

Transcriptome Analysis of Single Cells

Published on: April 25, 2011

Transcription initiation at its most basic level.

Ronen Marmorstein1

  • 1The Wistar Institute and the Department of Chemistry, University of Pennsylvania, Philadelphia, PA 19104, USA.

Cell
|November 19, 2003
PubMed
Summary
This summary is machine-generated.

The initiator binding protein from Trichomonas vaginalis has a structure that explains how it recognizes DNA promoters and recruits RNA polymerase II. This finding links primitive and higher eukaryotic transcription initiation.

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Last Updated: Jun 6, 2026

Transcriptome Analysis of Single Cells
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Published on: April 25, 2011

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09:28

In Vitro Transcription Assays and Their Application in Drug Discovery

Published on: September 20, 2016

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06:59

Transcription Start Site Mapping Using Super-low Input Carrier-CAGE

Published on: June 26, 2019

Area of Science:

  • Molecular Biology
  • Structural Biology
  • Eukaryotic Transcription

Background:

  • The transcription initiation process is fundamental to gene expression in all domains of life.
  • Understanding the roles of specific proteins in transcription initiation is crucial for deciphering gene regulation.
  • Trichomonas vaginalis, a primitive eukaryote, offers a unique model for studying conserved biological mechanisms.

Discussion:

  • The study elucidates the three-dimensional structure of the initiator binding protein from Trichomonas vaginalis.
  • This protein demonstrates a multi-functional capability, coordinating promoter recognition, RNA polymerase II recruitment, and transcription start site selection.
  • The structural insights provide a mechanistic explanation for how a single protein can manage these critical steps in transcription initiation.

Key Insights:

  • A single initiator binding protein in Trichomonas vaginalis performs multiple essential roles in transcription initiation.
  • The protein's structure reveals its capacity for direct interaction with DNA promoter elements.
  • The findings highlight the protein's function in recruiting the core transcription machinery, specifically RNA polymerase II.

Outlook:

  • The identified structure offers an evolutionary perspective on transcription initiation mechanisms.
  • Comparative analysis with homologous proteins in higher eukaryotes can illuminate conserved and divergent strategies.
  • This research may pave the way for understanding variations in transcription regulation across different eukaryotic lineages.