Transcription Elongation
Transcription Elongation - Related Videos
02:35
Transcription Elongation Factors
0 Views •
2020
Transcription elongation is a dynamic process that alters depending upon the sequence heterogeneity of the DNA being transcribed. Hence, it is not surprising that the elongation complex's composition also varies along the way while transcribing a gene. The transcription elongation is regulated via pausing of RNA polymerase on several occasions during transcription. In bacteria, these halts are necessary because the transcription of DNA into mRNA is coupled to the translation of that mRNA into a...
02:35
Transcription Elongation Factors
0 Views •
2023
Transcription elongation is a dynamic process that alters depending upon the sequence heterogeneity of the DNA being transcribed. Hence, it is not surprising that the elongation complex's composition also varies along the way while transcribing a gene. The transcription elongation is regulated via pausing of RNA polymerase on several occasions during transcription. In bacteria, these halts are necessary because the transcription of DNA into mRNA is coupled to the translation of that mRNA into a...
10:59
Artificial RNA Polymerase II Elongation Complexes for Dissecting Co-transcriptional RNA Processing Events
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Cited by 1 •
2019
Here, we describe the assembly of RNA polymerase II (Pol II) elongation complexes requiring only short synthetic DNA and RNA oligonucleotides and purified Pol II. These complexes are useful for studying mechanisms underlying co-transcriptional processing of transcripts associated with the Pol II elongation complex.
02:42
Eukaryotic Transcription Activators
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2020
Transcription activators are proteins that promote the transcription of genes from DNA to RNA. In most cases, these proteins contain two separate domains ‒ a domain that binds to DNA and a domain for activating transcription; however, in some cases, a single domain is responsible for both binding and activation of transcription, as seen in the glucocorticoid receptor and MyoD. The binding domains are capable of recognizing and interacting with regulatory sequences on the DNA. These domains are...
10:46
Novel Metrics to Characterize Embryonic Elongation of the Nematode Caenorhabditis elegans
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Cited by 3 •
2016
Here we detail protocols specifically designed to monitor morphogenic defects that occur during early and late phases of embryonic elongation of the nematode Caenorhabditis elegans. Ultimately, these protocols are designed to identify genes that regulate these phases and to characterize their differential requirements along the antero-posterior axis of the embryo.
FAQs
The transcription bubble provides a locally opened region of DNA where RNA polymerase can read the template strand while progressing along the gene. Within this region, complementary ribonucleoside triphosphates are selected and added to the RNA’s 3′ end. Maintaining the bubble therefore links DNA-template access with continuous transcript growth.
Elongation rate and pausing can change how efficiently a growing transcript is produced and how transcription connects with later RNA processing. A polymerase that pauses may alter the timing of transcript completion or its interactions with regulatory factors. These effects make elongation dynamics an important layer of control over gene expression, beyond simply starting transcription.
Initiation establishes a newly begun RNA molecule, whereas elongation acts on that initiated transcript and extends it as RNA polymerase travels along the DNA template. This distinction separates the decision to begin RNA production from the subsequent control of transcript growth. Studying both stages helps clarify where regulation influences overall gene expression.
Several features shape the outcome: the polymerase’s movement along the template, its selection of complementary ribonucleoside triphosphates, the maintenance of the transcription bubble, elongation rate, pausing, and interactions with regulatory factors. Together, these features can influence the developing RNA molecule, its processing, and the level of gene expression produced from the DNA-encoded information.
A study can focus on elongation rate, polymerase pausing, or interactions between the transcription machinery and regulatory factors. Researchers can then relate these features to RNA processing and gene expression. This approach helps connect molecular events during transcript growth with broader changes in how cells use DNA-encoded information to produce RNA and, ultimately, proteins.
Because elongation helps regulate transcript production after transcription has begun, disruptions in its control can affect protein production and cellular behavior. Its study provides context for developmental biology, cellular responses, and diseases caused by disrupted transcriptional regulation. Examining this stage can therefore reveal how altered RNA production contributes to broader biological outcomes.