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RepeatsDB

Provides annotated tandem repeat protein structures. RepeatsDB includes high quality annotations for ∼5400 protein structures. RepeatsDB features information on start and end positions for the repeat regions and units for all entries. The extensive growth of repeat unit characterization was possible by applying the ReUPred annotation method over the entire Protein Data Bank. The data quality is guaranteed by a manual validation for more than 60% of the entries. The updated web interface includes a search engine for complex queries and a fully re-designed entry page for a better overview of structural data. It is possible to compare unit positions, together with secondary structure, fold information and Pfam domains.

PolyQ

Supplies a set of all currently known human polyQ repeat-containing proteins. PolyQ provides basic information for each entry, it lacks in both depth and breadth of annotation as well as functionality. It contains a variety of structural and functional annotations, such as polyQ protein disease models in mouse, protein 3D structure, Pfam domain, post-translational modification (PTM) sites, single point mutations and complementary protein annotations, and also covers domain context of polyQ repeats.

CyanoPhyChe

Aids to choosing optimal conditions for expression, purification and characterization of a cyanobacterial protein. CyanoPhyChe is a collection of the calculated physicochemical properties, solubility, and probability of an expressed protein entering into an inclusion body, structural stability, polarity and secondary structure of all cyanobacterial proteins. User can also export the physicochemical properties, predicted secondary structure, amino acid sequence and amino acid composition of selected cyanobacterial proteins for further analysis.

HProtDB / Halophile Protein Database

A systematic attempt to document the biochemical and biophysical properties of proteins from halophilic archaea/bacteria which may be involved in adaptation of these organisms to saline conditions. In this database, various physicochemical properties such as molecular weight, theoretical pI, amino acid composition, atomic composition, estimated half-life, instability index, aliphatic index and grand average of hydropathicity (Gravy) have been listed.

COPASAAR

Obsolete
A tool to facilitate the rapid analysis of single amino acid repeats at a proteome level. The database aims to simplify the comparison of repeat distributions between proteomes in order to provide a better understanding of their function and evolution. COPASAAR is a useful tool for comparative proteomics that provides rapid access to amino acid repeat data that can be readily data-mined. The COPASAAR database can be queried at the kingdom, proteome or individual protein level.