Physicochemical Properties of Peptide



PPepDB ID:PPepDB_6118
Number of amino acids:247
Molecular Weight:26646.21 Da
Theoretical pI:8.28


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)187.29%
Cysteine CYS (C)176.88%
Glutamic Acid GLU (E)62.43%
Aspartic Acid ASP (D)104.05%
Glycine GLY (G)2811.34%
Phynylalanine PHE (F)145.67%
Isoleucine ILE (I)83.24%
Histidine HIS (H)20.81%
Lysine LYS (K)93.64%
Methionine MET (M)41.62%
Leucine LEU (L)135.26%
Asparagine ASN (N)166.48%
Glutamine GLN (Q)83.24%
Proline PRO (P)218.5%
Serine SER (S)114.45%
Arginine ARG (R)114.45%
Threonine THR (T)2510.12%
Tryptophan TRP (W)52.02%
Valine VAL (V)124.86%
Tyrosine TYR (Y)93.64%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1173
HydrogenH1776
NitrogenN322
OxygenO349
SulphurS21

FormulaC1173H1776N322O349S21
Total Number of Atoms:3641


Total number of positively charged residues (ARG + LYS):20
Total number of negatively charged residues (ASP + GLU):16
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    41910
Absorption 0.1% (=1 g/l)    1.573,   assuming all pairs of CYS residues form cystines

Ext. coefficient    40910
Absorption 0.1% (=1 g/l)    1.535,   assuming all CYS residues are reduced
Aromaticity:0.113

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 35.95

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[24.70, 30.77, 16.60]

Amino acids in helix: V, I, Y, F, W, L || Amino acids in turn: N, P, G, S || Amino acids in sheet: E, M, A, L
Aliphatic index:54.5344
Grand average of hydropathicity (GRAVY):-0.25