Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4548
Number of amino acids:157
Molecular Weight:17519.78 Da
Theoretical pI:5.44


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)159.55%
Cysteine CYS (C)00%
Glutamic Acid GLU (E)74.46%
Aspartic Acid ASP (D)95.73%
Glycine GLY (G)74.46%
Phynylalanine PHE (F)63.82%
Isoleucine ILE (I)117.01%
Histidine HIS (H)00%
Lysine LYS (K)95.73%
Methionine MET (M)21.27%
Leucine LEU (L)138.28%
Asparagine ASN (N)117.01%
Glutamine GLN (Q)74.46%
Proline PRO (P)53.18%
Serine SER (S)117.01%
Arginine ARG (R)63.82%
Threonine THR (T)1610.19%
Tryptophan TRP (W)21.27%
Valine VAL (V)117.01%
Tyrosine TYR (Y)95.73%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC787
HydrogenH1232
NitrogenN204
OxygenO244
SulphurS2

FormulaC787H1232N204O244S2
Total Number of Atoms:2469


Total number of positively charged residues (ARG + LYS):15
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    24410
Absorption 0.1% (=1 g/l)    1.393
Aromaticity:0.108

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 32.24

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[33.12, 21.66, 23.57]

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:89.4904
Grand average of hydropathicity (GRAVY):-0.21