Contents
What is motif analysis ChIP-seq?
Differential motif enrichment analysis can be used to analyze two ChIP-seq experiments for the same TF. One objective of such an analysis is to determine if the ChIP-ed TF changes co-factors between the two experiments.
What is motif in DNA sequence?
Sequence motifs are short, recurring patterns in DNA that are presumed to have a biological function. Often they indicate sequence-specific binding sites for proteins such as nucleases and transcription factors (TF).
How do you identify transcription factor binding sites?
Prediction of transcription factor binding sites is generally performed by scanning a DNA sequence of interest with a position weight matrix (PWM) for a transcription factor of interest [6, 7] and various pattern-matching tools have been developed for this purpose.
What are the two main categories of motif discovery algorithms?
There are two principal types of motif discovery algorithms; i.e. enumeration approach and probabilistic technique.
What is ChIP PCR?
ChIP-PCR is performed to analyze histone modifications and/or protein binding to a known subset of target loci in the genome. In ChIP-PCR, immune-enriched DNA fragments are identified and quantified using widely available PCR or qPCR reagents and technologies.
How do you identify motifs in a query sequence?
To know the motifs that our problem sequence has: guessing about function. Search with a protein query sequence against a database of regular expressions (PROSITE) or profiles (PROSITE profiles or Pfam). The result provides a description of the motivs found in the sequence.
How many transcription factors are there?
Approximately 1,500 transcription factors (TFs) are encoded in the mammalian genome1 and constitute the second largest gene family, with the immunoglobulin superfamily being the largest.
Which tool is used for identification of motifs?
Table 1
| Web Tool | Pipeline | # of Motifs Option |
|---|---|---|
| CompleteMOTIFs | Yes | No |
| DREME | No | No |
| MEME-ChIP | Yes | Yes |
| RSAT peak-motifs | Yes | Yes |
When to use motif oriented analysis of ChIP-seq?
A motif-centered, strand specific analysis of ChIP-seq data improves the accuracy of determining peak positions. If a genome contains a large number of binding sites for a given protein complex, such as transcription factor heterodimers or transcription factor/cofactor complexes, the relative positi …
What can ChIP seq data be used for?
ChIP-Seq is a powerful tool for identifying the interaction between genomic regulators and their bound DNAs, especially for locating transcription factor binding sites. However, high cost and high rate of false discovery of transcription factor binding sites identified from ChIP-Seq data significantly limit its application.
How does motif oriented high resolution analysis work?
Motif oriented high-resolution analysis of ChIP-seq data reveals the topological order of CTCF and cohesin proteins on DNA A motif-centered, strand specific analysis of ChIP-seq data improves the accuracy of determining peak positions.
How are motifs and motifs used in protein classification?
Motifs Motif is a region (a subsequence) of protein or DNA sequence that has a specific structure Motifs are candidates for functionally important sites Presence of a motif may be used as a base of protein classification