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Related Concept Videos

Protein-protein Interfaces02:04

Protein-protein Interfaces

Many proteins form complexes to carry out their functions, making protein-protein interactions (PPIs) essential for an organism's survival. Most PPIs are stabilized by numerous weak noncovalent chemical forces. The physical shape of the interfaces determines the way two proteins interact. Many globular proteins have closely-matching shapes on their surfaces, which form a large number of weak bonds. Additionally, many PPIs occur between two helices or between a surface cleft and a polypeptide...
Globular and Fibrous Proteins02:21

Globular and Fibrous Proteins

Many proteins can be classified into two distinct subtypes - globular or fibrous. These two types differ in their shapes and solubilities.
Globular proteins are also known as spheroproteins and typically are approximately round in shape. They contain a mix of amino acid types and contain differing sequences in their primary structures. Globular proteins have many different functions, such as enzymes, cellular messengers, and molecular transporters. These roles often require the proteins to be...
Conservation of Protein Domains Over Different Proteins02:26

Conservation of Protein Domains Over Different Proteins

Protein domains are small structurally independent units that are part of a single amino acid chain.  Although these domains are often structurally independent, they may rely on synergistic effects to perform their functions as part of a larger protein. Protein domains may be conserved within the same organism, as well as across different organisms.
A limited set of protein domains often duplicate and recombine during evolution. These domains can be organized in different combinations to form...
Conservation of Protein Domains02:26

Conservation of Protein Domains

Protein domains are small structurally independent units that are part of a single amino acid chain.  Although these domains are often structurally independent, they may rely on synergistic effects to perform their functions as part of a larger protein. Protein domains may be conserved within the same organism, as well as across different organisms.
A limited set of protein domains often duplicate and recombine during evolution. These domains can be organized in different combinations to form...
Protein Families02:47

Protein Families

Protein families are groups of homologous proteins; that is, they have similarities in amino acid sequences and three-dimensional structures. Protein families usually occur because of gene duplication, where an additional copy of a gene is inserted into the genome of an organism.   Mutations that change the amino acids but still allow the protein to be properly synthesized, will lead to new protein family members.   If these new proteins contain similar amino acids in key locations, protein...
Rapid Identification of Pathogens01:25

Rapid Identification of Pathogens

MALDI-TOF MS has transformed clinical microbiology by offering a rapid and reliable method for pathogen identification. The traditional approach to microbial identification typically involves time-consuming culture techniques and biochemical tests, which can delay the initiation of appropriate antimicrobial therapy. MALDI-TOF MS avoids these delays by using characteristic ribosomal protein mass patterns of microbial cells, enabling accurate species-level identification within minutes.Principle...

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Peptide-based Identification of Functional Motifs and their Binding Partners
14:28

Peptide-based Identification of Functional Motifs and their Binding Partners

Published on: June 30, 2013

RecMotif: a novel fast algorithm for weak motif discovery.

He Quan Sun1, Malcolm Yoke Hean Low, Wen Jing Hsu

  • 1School of Computer Engineering, Nanyang Technological University, 639798, Singapore. Sunh0013@e.ntu.edu.sg

BMC Bioinformatics
|December 22, 2010
PubMed
Summary

RecMotif is a novel algorithm for DNA sequence analysis. It efficiently discovers weak motifs, outperforming existing methods in speed and memory usage for complex biological data.

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Area of Science:

  • Computational Biology
  • Bioinformatics
  • Genomics

Background:

  • Weak motif discovery in DNA is a challenging computational biology problem.
  • Existing algorithms often suffer from high memory or execution time requirements.
  • A new algorithm, RecMotif, is proposed to address these limitations.

Purpose of the Study:

  • To introduce RecMotif, a fast and memory-efficient algorithm for DNA motif discovery.
  • To enable the discovery of all motifs under specific (l, d) parameters.
  • To overcome the scalability issues of previous motif discovery methods.

Main Methods:

  • RecMotif employs a novel approach to guarantee the discovery of all motifs.
  • The algorithm's space complexity is analyzed as O(m²n).
  • Performance is evaluated against existing algorithms using benchmark datasets and real biological sequences.

Main Results:

  • RecMotif demonstrates superior scalability for longer and weaker motifs compared to other algorithms.
  • It successfully solves challenging cases like (40, 14) within 5 hours.
  • For E.coli CRP sequences, RecMotif accurately identifies (18, 6) motifs in under 1 second.

Conclusions:

  • RecMotif is a highly efficient and scalable algorithm for weak DNA motif discovery.
  • Its low space complexity makes it suitable for large-scale genomic analyses.
  • RecMotif offers a significant advancement in computational biology tools.