Prunus Unigene v3

Analysis NamePrunus Unigene v3
SourceGenbank Prunus ESTs (Jun 1, 2006)
Date performed2006-06-01

Many sequencing projects around the world are depositing ESTs from the genus Prunus in the NCBI dbEST database. However, not all of these ESTs are of high quality. To filter, we crossmatched the public sequences against NCBI's UniVec database and used the BLAST sequence similarity algorithm to remove species-specific chloroplast, mitochondrial, tRNA, and rRNA sequences.

To reduce redundancy and create longer transcripts we assembled these ESTs using the CAP3 1 program. For some sequences, we were able to obtain the original trace files and incorporate the phred quality values for each base into the assembly. The final assembly has been annotated by BLAST sequence similarity searching 2 against Swiss-Prot 3, TrEMBL 3, and TAIR 4's Arabidopsis proteins.

For more information on this project please contact the GDR development team.

All the Prunus ESTs from GenBank on July 14, 2006 were included in this assembly. The parameters used for CAP3 were -p 90. CAP3 outputs assembled contigs and singlets. The number of tentative unigenes for this assembly is comprised of the combined contigs and singlets.

 Processing Summary
 Number of ESTs available  85340
 Number of ESTs available after filtering  83751
 Average Length  570
 Number of Contigs(CAP3 Assembly, -p 90 )  8818
 Average Length of Contigs  920
 Number of Singlets  14903
 Number of Putative Unigenes  23721



  1. Huan, X. and Madan, A. (1999). CAP3: A DNA sequence assembly program. Genome Research, 9, 868-877.
  2. Altschul SF, Gish W, Miller W, Myers EW, Lipman DJ. (1990) Basic local alignment search tool. J Mol Biol. 215(3):403-10.
  3. Boeckmann B., Bairoch A., Apweiler R., Blatter M.-C., Estreicher A., Gasteiger E., Martin M.J., Michoud K., O'Donovan C., Phan I., Pilbout S., and Sneider M. (2003) The SWISS-PROT protein knowledgebase and its supplement TrEMBL in 2003. Nucleic Acids Research. 31:365-370.
  4. Rhee SY, Beavis W, Berardini TZ, Chen G, Dixon D, Doyle A, Garcia-Hernandez M, Huala E, Lander G, Montoya M, Miller N, Mueller LA, Mundodi S, Reiser L, Tacklind J, Weems DC, Wu Y, Xu I, Yoo D, Yoon J, Zhang P. (2003) The Arabidopsis Information Resource (TAIR): a model organism database providing a centralized, curated gate way to Arabidopsis biology, research materials and community. Nucleic Acids Res.. 31(1):224-8.



Library Information
The Prunus ESTs used for this assembly were downloaded on June 14th, 2006


 EST Libraries
 Number of ESTs available  83751
 # of Species  6
 # of Libraries  35
 # of Tissues  10
 # of Development Stages  17


View detailed chart of libraries.

 Prunus armeniaca  14710
 Prunus avium  21
 Prunus avium x cerasus x canescens  84
 Prunus cerasus  12
 Prunus dulcis  3776
 Prunus persica  65148



Homology was determined using the BLASTx algorithm for the Prunus Contigs and Singlets vs. the Swiss-Prot and TrEMBL databases. Only matches with an E-value of 1.0 e-9 or better were recorded. Swiss-Prot is a curated protein database with a high level of annotation and a minimal level of redundancy, and TrEMBL is a computer-annotated supplement of Swiss-Prot that contains all the translations of TrEMBL nucleotide sequence entries not yet integrated in Swiss-Prot.

 Homology of Prunus Contigs
 Number of Contigs  8818
 Number (%) of Contigs with a Match in Swiss-Prot Database
 Download Excel Spreadsheet
 4996 (56.7%)
 Number (%) of Contigs with a Match in TrEMBL Database
 Download Excel Spreadsheet
 7592 (86.1%)


 Homology of Prunus Singlets
 Number of Singlets  58982
 Number (%) of Singlets with a Match in Swiss-Prot Database
 Download Excel Spreadsheet
 4464 (30.0%)
 Number (%) of Singlets with a Match in TrEMBL Database
 Download Excel Spreadsheet
 8423 (56.5%)


Microsatellite Analysis

The type and frequency of simple sequence repeats in this unigene assembly (v3) were determined using the program. For these searches, SSRs are defined as dinucleotides repeated at least 5 times, trinucleotides repeated at least 4 times, tetranucleotides repeated at least 3 times, or pentanucleotides repeated at least 3 times.

 Sequence information
 Number of Sequences  83751
 Number of Sequences Having One Or More SSRs  19821
 Percentage of Sequences Having One Or More SSRs  23.7%
 Total Number of SSRs Found  26772
 Number of Motifs  577


Frequency of Motif Type
 Motif Length  Frequency  Percentage Frequency
 2bp  8670  32.4%
 3bp  13129  49.0%
 4bp  13129  13.4%
 5bp  1379  5.2%



Contact Details
 Name  Main, Dorrie
 Lab  Department of Horticulture
 Organization  Washington State University
 Address  45 Johnson Hall, Pullman, WA 99164
 Telephone  509-335-2774
 Fax  509-335-8690



No publications are currently available.

Contig GO Terms

The GO Terms ( were determined by comparing the contigs against Swiss-Prot using BLAST. The Sprot2GO annotation file was then used to map go terms to the sequences using relevant matches (1e-9).

2429 Contigs have Biological Process annotation:

2785 Contigs have Cellular Component annotation:

3410 Contigs have Molecular Function annotation:


ESNP Summary

The type and frequency of single nucleotide polymorphisms in this unigene assembly (V3) were determined using the AutoSNP software package (Savage et al., 2005).

View autoSNP output:

 SNP Summary
 Number of Contigs  8818
 Number of SNPs  5284
 Consensus Size  8118336 bp
 SNP Frequency  0.07/100 bp
 Total Transistions  2345
 Total Transversions  1353
 Total Indels  1586