Journal
MOLECULAR BIOLOGY
Volume 45, Issue 6, Pages 983-992Publisher
MAIK NAUKA/INTERPERIODICA/SPRINGER
DOI: 10.1134/S0026893311060082
Keywords
glycoside hydrolase; GHL families; new protein families; protein superfamily; PSI-BLAST; PSI Protein Classifier; CAZy; TIM-barrel fold; hierarchical protein classification; protein evolution; search for homologues; gene annotation
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The domains of 15 recently discovered families of the hypothetical glycoside hydrolases GHL1-GHL15 were used for iterative screening of the protein database. The evolutionary relationships between these families were revealed, as well as their relationship with the previously known families of protein domains: GH5, GH13, GH13-33, GH17, GH18, GH20, GH27, GH29, GH31, GH35, GH36A, GH36B, GH36C, GH36D, GH36E, GH36F, GH36G, GH36H, GH36J, GH36K, GH39, GH42, GH53, GH66, GH97, GH101, GH107, GH112, GH114, COG1082, COG1306, COG1649, COG2342, DUF3111, and PF00962. The unclassified homologues were grouped in 35 new families of the hypothetical glycoside hydrolases: GHL16-GHL50. The position of the families GHL1-GHL15 in the hierarchical classification of glycoside hydrolases and their homologues is discussed. Several new superfamilies of protein domains are proposed.
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