NPS

NPS provides integrated protein sequence analysis for homology searching, sequence set construction, multiple sequence alignment, secondary structure prediction, physico-chemical profiling, motif/signature detection, and databank integration to support protein sequence annotation.

Key Features:

• Homology searching: Performs sequence similarity searches against integrated sequence resources.
• Customized sequence set construction: Builds user-defined sequence collections for downstream analyses.
• Multiple sequence alignment: Produces alignments for sets of homologous protein sequences.
• Secondary structure prediction and consensus annotation: Predicts secondary structure elements and generates consensus annotations.
• Physico-chemical profiling: Computes properties including hydrophobicity, antigenicity, membrane propensity, and solvent accessibility.
• Functional motif and signature detection (PROSITE): Detects PROSITE patterns and signatures in protein sequences.
• Coiled-coil and helix-turn-helix prediction: Identifies coiled-coil regions and helix-turn-helix motifs.
• Custom pattern and personal databank searching: Supports searching with user-defined patterns and personal sequence databanks.
• Integration with public sequence resources: Interfaces with EMBL, GenBank, SWISS-PROT, and PDB for sequence retrieval and comparison.

Scientific Applications:

• Homology-based annotation: Supports transfer of functional information via sequence similarity.
• Structural feature prediction: Facilitates identification of secondary structure elements and structural motifs.
• Motif and signature identification: Enables detection of functional motifs and PROSITE signatures for functional inference.
• Dataset curation: Assists construction and refinement of customized sequence datasets for comparative analyses.

Methodology:

Computational methods include homology searches, construction of customized sequence sets, multiple sequence alignment, secondary structure prediction with consensus annotation, physico-chemical profiling (hydrophobicity, antigenicity, membrane propensity, solvent accessibility), PROSITE pattern matching, coiled-coil and helix-turn-helix prediction, customizable pattern searches, and integration with EMBL, GenBank, SWISS-PROT, and PDB.