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Nucleic Acids Research, 2000, Vol. 28, No. 1 33-36
© 2000 Oxford University Press

The COG database: a tool for genome-scale analysis of protein functions and evolution

Roman L. Tatusov, Michael Y. Galperin, Darren A. Natale and Eugene V. Koonin*

National Center for Biotechnology Information, National Library of Medicine, National Institutes of Health, Bethesda, MD 20894, USA

Rational classification of proteins encoded in sequenced genomes is critical for making the genome sequences maximally useful for functional and evolutionary studies. The database of Clusters of Orthologous Groups of proteins (COGs) is an attempt on a phylogenetic classification of the proteins encoded in 21 complete genomes of bacteria, archaea and eukaryotes (http://www.ncbi.nlm.nih.gov/COG ). The COGs were constructed by applying the criterion of consistency of genome-specific best hits to the results of an exhaustive comparison of all protein sequences from these genomes. The database comprises 2091 COGs that include 56–83% of the gene products from each of the complete bacterial and archaeal genomes and ~35% of those from the yeast Saccharomyces cerevisiae genome. The COG database is accompanied by the COGNITOR program that is used to fit new proteins into the COGs and can be applied to functional and phylogenetic annotation of newly sequenced genomes.

* To whom correspondence should be addressed. Tel: +1 301 435 5913; Fax: +1 301 480 9241; Email: koonin@ncbi.nlm.nih.gov


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The Homologous Putative GTPases Grn1p from Fission Yeast and the Human GNL3L Are Required for Growth and Play a Role in Processing of Nucleolar Pre-rRNA
Mol. Biol. Cell, January 1, 2006; 17(1): 460 - 474.
[Abstract] [Full Text] [PDF]


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Hum Mol GenetHome page
N. Reynolds, B. Collier, K. Maratou, V. Bingham, R. M. Speed, M. Taggart, C. A. Semple, N. K. Gray, and H. J. Cooke
Dazl binds in vivo to specific transcripts and can regulate the pre-meiotic translation of Mvh in germ cells
Hum. Mol. Genet., December 15, 2005; 14(24): 3899 - 3909.
[Abstract] [Full Text] [PDF]


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Infect. Immun.Home page
A. R. Mey, E. E. Wyckoff, V. Kanukurthy, C. R. Fisher, and S. M. Payne
Iron and Fur Regulation in Vibrio cholerae and the Role of Fur in Virulence
Infect. Immun., December 1, 2005; 73(12): 8167 - 8178.
[Abstract] [Full Text] [PDF]


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J. Bacteriol.Home page
K. V. Alsaker and E. T. Papoutsakis
Transcriptional Program of Early Sporulation and Stationary-Phase Events in Clostridium acetobutylicum
J. Bacteriol., October 15, 2005; 187(20): 7103 - 7118.
[Abstract] [Full Text] [PDF]


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Nucleic Acids ResHome page
K. S. Makarova, Y. I. Wolf, S. L. Mekhedov, B. G. Mirkin, and E. V. Koonin
Ancestral paralogs and pseudoparalogs and their role in the emergence of the eukaryotic cell
Nucleic Acids Res., August 16, 2005; 33(14): 4626 - 4638.
[Abstract] [Full Text] [PDF]


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J. Bacteriol.Home page
A. Tauch, O. Kaiser, T. Hain, A. Goesmann, B. Weisshaar, A. Albersmeier, T. Bekel, N. Bischoff, I. Brune, T. Chakraborty, et al.
Complete Genome Sequence and Analysis of the Multiresistant Nosocomial Pathogen Corynebacterium jeikeium K411, a Lipid-Requiring Bacterium of the Human Skin Flora
J. Bacteriol., July 1, 2005; 187(13): 4671 - 4682.
[Abstract] [Full Text] [PDF]


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Nucleic Acids ResHome page
L. Jaroszewski, L. Rychlewski, Z. Li, W. Li, and A. Godzik
FFAS03: a server for profile-profile sequence alignments
Nucleic Acids Res., July 1, 2005; 33(suppl_2): W284 - W288.
[Abstract] [Full Text] [PDF]


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BioinformaticsHome page
W. H. Majoros, M. Pertea, and S. L. Salzberg
Efficient implementation of a generalized pair hidden Markov model for comparative gene finding
Bioinformatics, May 1, 2005; 21(9): 1782 - 1788.
[Abstract] [Full Text] [PDF]


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Plant Physiol.Home page
K. Horan, J. Lauricha, J. Bailey-Serres, N. Raikhel, and T. Girke
Genome Cluster Database. A Sequence Family Analysis Platform for Arabidopsis and Rice
Plant Physiology, May 1, 2005; 138(1): 47 - 54.
[Abstract] [Full Text] [PDF]


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GeneticsHome page
S. Huang and E. K. O'Shea
A Systematic High-Throughput Screen of a Yeast Deletion Collection for Mutants Defective in PHO5 Regulation
Genetics, April 1, 2005; 169(4): 1859 - 1871.
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MicrobiologyHome page
S.-V. Albers and A. J. M. Driessen
Analysis of ATPases of putative secretion operons in the thermoacidophilic archaeon Sulfolobus solfataricus
Microbiology, March 1, 2005; 151(3): 763 - 773.
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BioinformaticsHome page
Y. Chen and D. Xu
Understanding protein dispensability through machine-learning analysis of high-throughput data
Bioinformatics, March 1, 2005; 21(5): 575 - 581.
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BioinformaticsHome page
P. Stothard and D. S. Wishart
Circular genome visualization and exploration using CGView
Bioinformatics, February 15, 2005; 21(4): 537 - 539.
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J. Bacteriol.Home page
G. Huang, Q. Fan, S. Lechno-Yossef, E. Wojciuch, C. P. Wolk, T. Kaneko, and S. Tabata
Clustered Genes Required for the Synthesis of Heterocyst Envelope Polysaccharide in Anabaena sp. Strain PCC 7120
J. Bacteriol., February 1, 2005; 187(3): 1114 - 1123.
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Plant Physiol.Home page
A. Montsant, K. Jabbari, U. Maheswari, and C. Bowler
Comparative Genomics of the Pennate Diatom Phaeodactylum tricornutum
Plant Physiology, February 1, 2005; 137(2): 500 - 513.
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J. Biol. Chem.Home page
A. X. Tran, M. J. Karbarz, X. Wang, C. R. H. Raetz, S. C. McGrath, R. J. Cotter, and M. S. Trent
Periplasmic Cleavage and Modification of the 1-Phosphate Group of Helicobacter pylori Lipid A
J. Biol. Chem., December 31, 2004; 279(53): 55780 - 55791.
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Plant Cell PhysiolHome page
T. Nanjo, N. Futamura, M. Nishiguchi, T. Igasaki, K. Shinozaki, and K. Shinohara
Characterization of Full-length Enriched Expressed Sequence Tags of Stress-treated Poplar Leaves
Plant Cell Physiol., December 15, 2004; 45(12): 1738 - 1748.
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Microbiol. Mol. Biol. Rev.Home page
E. Zientz, T. Dandekar, and R. Gross
Metabolic Interdependence of Obligate Intracellular Bacteria and Their Insect Hosts
Microbiol. Mol. Biol. Rev., December 1, 2004; 68(4): 745 - 770.
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J. Bacteriol.Home page
J. Kang, D. Tavakoli, A. Tschumi, R. A. Aras, and M. J. Blaser
Effect of Host Species on RecG Phenotypes in Helicobacter pylori and Escherichia coli
J. Bacteriol., November 15, 2004; 186(22): 7704 - 7713.
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MicrobiologyHome page
D. A. Rodionov, M. S. Gelfand, and N. Hugouvieux-Cotte-Pattat
Comparative genomics of the KdgR regulon in Erwinia chrysanthemi 3937 and other gamma-proteobacteria
Microbiology, November 1, 2004; 150(11): 3571 - 3590.
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Genome ResHome page
J. D. Jaffe, N. Stange-Thomann, C. Smith, D. DeCaprio, S. Fisher, J. Butler, S. Calvo, T. Elkins, M. G. FitzGerald, N. Hafez, et al.
The Complete Genome and Proteome of Mycoplasma mobile
Genome Res., August 1, 2004; 14(8): 1447 - 1461.
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GeneticsHome page
D. P. Zimmer, O. Paliy, B. Thomas, P. Gyaneshwar, and S. Kustu
Genome Image Programs: Visualization and Interpretation of Escherichia coli Microarray Experiments
Genetics, August 1, 2004; 167(4): 2111 - 2119.
[Abstract] [Full Text] [PDF]


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Nucleic Acids ResHome page
E. Kolker, K. S. Makarova, S. Shabalina, A. F. Picone, S. Purvine, T. Holzman, T. Cherny, D. Armbruster, R. S. Munson Jr, G. Kolesov, et al.
Identification and functional analysis of 'hypothetical' genes expressed in Haemophilus influenzae
Nucleic Acids Res., April 30, 2004; 32(8): 2353 - 2361.
[Abstract] [Full Text] [PDF]



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