T-Coffee: a web server for the multiple sequence alignment of protein and RNA sequences using structural information and homology extension

Nucleic Acids Res. 2011 Jul;39(Web Server issue):W13-7. doi: 10.1093/nar/gkr245. Epub 2011 May 9.


This article introduces a new interface for T-Coffee, a consistency-based multiple sequence alignment program. This interface provides an easy and intuitive access to the most popular functionality of the package. These include the default T-Coffee mode for protein and nucleic acid sequences, the M-Coffee mode that allows combining the output of any other aligners, and template-based modes of T-Coffee that deliver high accuracy alignments while using structural or homology derived templates. These three available template modes are Expresso for the alignment of protein with a known 3D-Structure, R-Coffee to align RNA sequences with conserved secondary structures and PSI-Coffee to accurately align distantly related sequences using homology extension. The new server benefits from recent improvements of the T-Coffee algorithm and can align up to 150 sequences as long as 10,000 residues and is available from both http://www.tcoffee.org and its main mirror http://tcoffee.crg.cat.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Internet
  • Nucleic Acid Conformation
  • Protein Conformation
  • RNA / chemistry
  • Sequence Alignment / methods*
  • Sequence Analysis, Protein*
  • Sequence Analysis, RNA*
  • Software*


  • RNA