Primer-BLAST: A tool to design target-specific primers for polymerase chain reaction
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- 作者：Jian Ye (1)
George Coulouris (1)
Irena Zaretskaya (1)
Ioana Cutcutache (2)
Steve Rozen (2)
Thomas L Madden (1) - 刊名：BMC Bioinformatics
- 出版年：2012
- 出版时间：December 2012
- 年：2012
- 卷：13
- 期：1
- 全文大小：853KB
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17. PUBLIC DOMAIN NOTICE for NCBIhttp://www.ncbi.nlm.nih.gov/bookshelf/br.fcgi?book=toolkit&part=toolkit.fm#A3 - 作者单位：Jian Ye (1)
George Coulouris (1)
Irena Zaretskaya (1)
Ioana Cutcutache (2)
Steve Rozen (2)
Thomas L Madden (1)
1. National Center for Biotechnology Information, National Library of Medicine, National Institutes of Health, Building 45, 8600 Rockville Pike, Bethesda, MD, 20894, USA
2. Neuroscience and Behavioral Disorders Program, Duke-NUS Graduate Medical School, 8 College Road, Singapore, 169857, Singapore - ISSN：1471-2105
文摘
Background Choosing appropriate primers is probably the single most important factor affecting the polymerase chain reaction (PCR). Specific amplification of the intended target requires that primers do not have matches to other targets in certain orientations and within certain distances that allow undesired amplification. The process of designing specific primers typically involves two stages. First, the primers flanking regions of interest are generated either manually or using software tools; then they are searched against an appropriate nucleotide sequence database using tools such as BLAST to examine the potential targets. However, the latter is not an easy process as one needs to examine many details between primers and targets, such as the number and the positions of matched bases, the primer orientations and distance between forward and reverse primers. The complexity of such analysis usually makes this a time-consuming and very difficult task for users, especially when the primers have a large number of hits. Furthermore, although the BLAST program has been widely used for primer target detection, it is in fact not an ideal tool for this purpose as BLAST is a local alignment algorithm and does not necessarily return complete match information over the entire primer range. Results We present a new software tool called Primer-BLAST to alleviate the difficulty in designing target-specific primers. This tool combines BLAST with a global alignment algorithm to ensure a full primer-target alignment and is sensitive enough to detect targets that have a significant number of mismatches to primers. Primer-BLAST allows users to design new target-specific primers in one step as well as to check the specificity of pre-existing primers. Primer-BLAST also supports placing primers based on exon/intron locations and excluding single nucleotide polymorphism (SNP) sites in primers. Conclusions We describe a robust and fully implemented general purpose primer design tool that designs target-specific PCR primers. Primer-BLAST offers flexible options to adjust the specificity threshold and other primer properties. This tool is publicly available at http://www.ncbi.nlm.nih.gov/tools/primer-blast.