The open-access JASPAR database of matrix-based transcription factor binding profiles (Bryne et al. 2008) was used to search 3,000 bp upstream and 500 bp downstream of the TSS of each gene.
Given two sets of PFMs, one comprising the predicted matrices and the other a database of known matrices for TFBSs, a Perl [ 43] script was used to carry out matrix comparisons – comparing each predicted matrix to all the entries in the database.
Following which the DNA sequences for transcriptional elements were identified by using TRANSFAC database of weighted matrices of transcription factor binding sites.
The first 600 bp of the 5′-non-coding regions of X. tropicalis ADH genes were checked for potential transcription factor binding sites using MATCH [ 38], based on the TRANSFAC database of position weight matrices, using 100% coincidence for the core and 95% for the whole matrix.
For this analysis, we used the JASPAR Core 2005 database, an open-access database of 123 annotated, matrix-based TFBS motifs for multicellular eukaryotes [35].
In brief, CCO studies begin by confirming that data meet a series of necessary requisites and end with a sensitivity analysis, after passing through a series of intermediate steps that include the transformation of the database into a matrix with CCO structure.
Database of position-specific scoring matrix (PSSMs) for COGs are downloaded from NCBI and are used to annotate protein sequences.
Because the consolidated database of TF binding weight matrix models may have multiple models for the same TF, the bias in P-value calculation implanted by multiple hypothesis testing was removed by performing a Bonferroni correction on the raw P-value for each individual weight matrix of the same TF.
Protein identification was processed and analyzed by searching the Swiss-Prot aNCBICBI protein database using the MASCOT search engine of Matrix Science, integrated in the Global Protein Server (GPS) Workstation.
JASPAR [ 18, 19] is an open-access database of annotated, high-quality, matrix-based transcription factor binding site profiles for multicellular eukaryotes.
However, in order to discover genes within our dataset that are likely to play a role in shell deposition and calcium regulation, we searched the literature to generate an in-house database of proteins involved in extracellular matrix (ECM) formation and calcium homeostasis in metazoans (Supplemental Tables 1 and 2).
