Protein Structure and Sequence Analyser (PSSA)
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Structure and Sequence Analysis for


Contact Map Protein Analysis Secondary Structure Analysis LCR Analysis


Percentage analysis
Amino-acid Content


Contact Map


Protein Analysis

Non-Polar Amino acids

GLY, ALA, VAL, ILE , LEU, MET, PHE, TYR, TRP, PRO

Polar-Amino acids

SER, THR, ASN, GLN, CYS

Charged Amino acids

Positive (LYS, ARG, HIS) | Negative (GLU, ASP)

**Histidine is assigned unit positive charge



Secondary Structure Analysis


Fr. = Fraction ; St.=Structure ; aa= Amino acid


LCR Analysis


Like Charge Regions (LCRs) are the regions in protein sequence where only similar charged residues are present, shown in figure below.

LCR-image


In the table above, Column1: Secondary structure, Column2: Length of the secondary structure, Column3:Residue Numbers of that secondary structure, Column4 and Column6: Positive and Negative LCRs, [a,b] represents LCRs of length 'a' and 'b' in that particular secondary structure, Column5 and Column7: Number of Charged residues, [c,d] represents the 'c' charged residues in LCR of length 'a' and 'd' charged residues in LCR of length 'b'

*** The Download-Data has image file of protein, and four excel files, two containing the data for amino acid analysis, LCR analysis and One with data for amino acid in each secondary structure.