Evola: Ortholog database of all human genes in H-InvDB with manual curation of phylogenetic trees

Akihiro Matsuya, Ryuichi Sakate*, Yoshihiro Kawahara, Kanako O. Koyanagi, Yoshiharu Sato, Yasuyuki Fujii, Chisato Yamasaki, Takuya Habara, Hajime Nakaoka, Fusano Todokoro, Kaori Yamaguchi, Toshinori Endo, Satoshi Oota, Wojciech Makalowski, Kazuho Ikeo, Yoshiyuki Suzuki, Kousuke Hanada, Katsuyuki Hashimoto, Momoki Hirai, Hisakazu IwamaNaruya Saitou, Aiko T. Hiraki, Lihua Jin, Yayoi Kaneko, Masako Kanno, Katsuhiko Murakami, Akiko Ogura Noda, Naomi Saichi, Ryoko Sanbonmatsu, Mami Suzuki, Jun Ichi Takeda, Masayuki Tanaka, Takashi Gojobori, Tadashi Imanishi, Takeshi Itoh

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

33 Scopus citations


Orthologs are genes in different species that evolved from a common ancestral gene by speciation. Currently, with the rapid growth of transcriptome data of various species, more reliable orthology information is prerequisite for further studies. However, detection of orthologs could be erroneous if pairwise distance-based methods, such as reciprocal BLAST searches, are utilized. Thus, as a sub-database of H-InvDB, an integrated database of annotated human genes (http://h-invitational.jp/), we constructed a fully curated database of evolutionary features of human genes, called 'Evola'. In the process of the ortholog detection, computational analysis based on conserved genome synteny and transcript sequence similarity was followed by manual curation by researchers examining phylogenetic trees. In total, 18 968 human genes have orthologs among 11 vertebrates (chimpanzee, mouse, cow, chicken, zebrafish, etc.), either computationally detected or manually curated orthologs. Evola provides amino acid sequence alignments and phylogenetic trees of orthologs and homologs. In 'dN/ dS view', natural selection on genes can be analyzed between human and other species. In 'Locus maps', all transcript variants and their exon/intron structures can be compared among orthologous gene loci. We expect the Evola to serve as a comprehensive and reliable database to be utilized in comparative analyses for obtaining new knowledge about human genes.

Original languageEnglish (US)
Pages (from-to)D787-D792
Issue numberSUPPL. 1
StatePublished - Jan 2008
Externally publishedYes

ASJC Scopus subject areas

  • Genetics


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