Title
Statistical Analysis of Terminal Extensions of Protein β-Strand Pairs.
Abstract
The long-range interactions, required to the accurate predictions of tertiary structures of β-sheet-containing proteins, are still difficult to simulate. To remedy this problem and to facilitate β-sheet structure predictions, many efforts have been made by computational methods. However, known efforts on β-sheets mainly focus on interresidue contacts or amino acid partners. In this study, to go one step further, we studied β-sheets on the strand level, in which a statistical analysis was made on the terminal extensions of paired β-strands. In most cases, the two paired β-strands have different lengths, and terminal extensions exist. The terminal extensions are the extended part of the paired strands besides the common paired part. However, we found that the best pairing required a terminal alignment, and β-strands tend to pair to make bigger common parts. As a result, 96.97%  of β-strand pairs have a ratio of 25% of the paired common part to the whole length. Also 94.26% and 95.98%  of β-strand pairs have a ratio of 40% of the paired common part to the length of the two β-strands, respectively. Interstrand register predictions by searching interacting β-strands from several alternative offsets should comply with this rule to reduce the computational searching space to improve the performances of algorithms.
Year
DOI
Venue
2013
10.1155/2013/909436
Adv. Bioinformatics
Keywords
Field
DocType
bioinformatics,biomedical research
Computer science,Pairing,Bioinformatics,Statistical analysis
Journal
Volume
Issue
ISSN
2013
null
1687-8027
Citations 
PageRank 
References 
1
0.39
11
Authors
5
Name
Order
Citations
PageRank
Ning Zhang1192.75
Shan Gao255.17
Lei Zhang340568.71
Jishou Ruan41389.78
Tao Zhang511.40