HMM search tools @ Stockholm Bioinformatics Center


Search a protein database (KIND) through a HMM model


The search uses a protein query in FASTA format and runs it against the KIND - Karolinska Institutet Non-redundant Database using the position independent Smith-Waterman algorithm (swp). The search can be done using several standard substitution matrixes like BLOSUM62 or PAM250. The matching protein sequences are multiple aligned by a hierarchical method using the ClustalW software. A position-specific scoring matrix or HMM is then calculated and calibrate with the HMMER package. The HMM is searched against the KIND database. By multiple aligning the output and building a new HMM the user can choose to iterate several times in order to get a better result.

Search a HMM database (Scop, pfam)

The search compares a protein sequence against a database of HMM models like pfam and Scop. HMM searches perform position independent gap scoring using the Viterbi algorithm.



The theory behind HMMs

Comparison and benchmarks

 

 

 

The search hardware used was manufactured by Paracel and kindly provided by biovitrum.


Comments or questions on the site? Send a mail to julian#sbc.su.se


Links to databases:
Pfam | Scop |KIND
Other HMM search links:
KI (Sweden) | The Sanger Center | Washinton University | INRA (France) | SwissPfam | SAM-T99