Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5995
Number of amino acids:252
Molecular Weight:27863.75 Da
Theoretical pI:9.04


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)145.56%
Cysteine CYS (C)124.76%
Glutamic Acid GLU (E)103.97%
Aspartic Acid ASP (D)93.57%
Glycine GLY (G)176.75%
Phynylalanine PHE (F)145.56%
Isoleucine ILE (I)155.95%
Histidine HIS (H)20.79%
Lysine LYS (K)197.54%
Methionine MET (M)10.4%
Leucine LEU (L)249.52%
Asparagine ASN (N)239.13%
Glutamine GLN (Q)83.17%
Proline PRO (P)83.17%
Serine SER (S)2610.32%
Arginine ARG (R)103.97%
Threonine THR (T)176.75%
Tryptophan TRP (W)20.79%
Valine VAL (V)124.76%
Tyrosine TYR (Y)93.57%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1230
HydrogenH1940
NitrogenN338
OxygenO374
SulphurS13

FormulaC1230H1940N338O374S13
Total Number of Atoms:3895


Total number of positively charged residues (ARG + LYS):29
Total number of negatively charged residues (ASP + GLU):19
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    25160
Absorption 0.1% (=1 g/l)    0.903,   assuming all pairs of CYS residues form cystines

Ext. coefficient    24410
Absorption 0.1% (=1 g/l)    0.876,   assuming all CYS residues are reduced
Aromaticity:0.099

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 39.67

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[30.16, 29.37, 19.44]

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:79.7222
Grand average of hydropathicity (GRAVY):-0.24