Homepeptide Repeats: Implications for Protein Structure, Function and Evolution

Analysis of protein sequences from Mycobacterium tuberculosis H37Rv (Mtb H37Rv) was performed to identify homopeptide repeat-containing proteins (HRCPs). Functional annotation of the HRCPs showed that they are preferentially involved in cellular metabolism. Furthermore, these homopeptide repeats mig...

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Veröffentlicht in:Genomics, proteomics & bioinformatics proteomics & bioinformatics, 2012-08, Vol.10 (4), p.217-225
Hauptverfasser: Uthayakumar, Muthukumarasamy, Benazir, Bowdadu, Patra, Sanjeev, Vaishnavi, Marthandan Kirti, Gurusaran, Manickam, Sureka, Kanagarajan, Jeyakanthan, Jeyaraman, Sekar, Kanagaraj
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container_title Genomics, proteomics & bioinformatics
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creator Uthayakumar, Muthukumarasamy
Benazir, Bowdadu
Patra, Sanjeev
Vaishnavi, Marthandan Kirti
Gurusaran, Manickam
Sureka, Kanagarajan
Jeyakanthan, Jeyaraman
Sekar, Kanagaraj
description Analysis of protein sequences from Mycobacterium tuberculosis H37Rv (Mtb H37Rv) was performed to identify homopeptide repeat-containing proteins (HRCPs). Functional annotation of the HRCPs showed that they are preferentially involved in cellular metabolism. Furthermore, these homopeptide repeats might play some specific roles in protein–protein interaction. Repeat length differences among Bacteria, Archaea and Eukaryotes were calculated in order to identify the conservation of the repeats in these divergent kingdoms. From the results, it was evident that these repeats have a higher degree of conservation in Bacteria and Archaea than in Eukaryotes. In addition, there seems to be a direct correlation between the repeat length difference and the degree of divergence between the species. Our study supports the hypothesis that the presence of homopeptide repeats influences the rate of evolution of the protein sequences in which they are embedded. Thus, homopeptide repeat may have structural, functional and evolutionary implications on proteins.
doi_str_mv 10.1016/j.gpb.2012.04.001
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subjects Amino Acid Sequence
amino acid sequences
Amino Acids - analysis
Archaea
Archaeal Proteins - chemistry
bacteria
Bacterial Proteins - chemistry
Bacterial Proteins - genetics
Bacterial Proteins - metabolism
Bioinformatics
Biological Evolution
Disordered regions
Escherichia coli - chemistry
eukaryotic cells
evolution
Evolution, Molecular
Homopeptide repeats
Humans
Metabolism
Models, Molecular
Mycobacterium tuberculosis
Mycobacterium tuberculosis - chemistry
Mycobacterium tuberculosis - genetics
Mycobacterium tuberculosis - metabolism
Original Research
Peptides - chemistry
Peptides - genetics
Protein Conformation
Protein domains
Protein structure
Protein Structure, Tertiary
proteins
Proteins - chemistry
proteomics
Rate of evolution
Repetitive Sequences, Amino Acid
Replication slippage
Sequence Analysis, Protein
Structure-function relationships
Sulfolobus acidocaldarius - chemistry
古细菌
真核细胞
结核分枝杆菌
结核杆菌
蛋白质序列
蛋白质相互作用
蛋白质结构
进化
title Homepeptide Repeats: Implications for Protein Structure, Function and Evolution
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