Physicochemical Properties of Peptide



PPepDB ID:PPepDB_600
Number of amino acids:207
Molecular Weight:22128.86 Da
Theoretical pI:8.16


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)2210.63%
Cysteine CYS (C)167.73%
Glutamic Acid GLU (E)41.93%
Aspartic Acid ASP (D)136.28%
Glycine GLY (G)2210.63%
Phynylalanine PHE (F)125.8%
Isoleucine ILE (I)41.93%
Histidine HIS (H)10.48%
Lysine LYS (K)73.38%
Methionine MET (M)10.48%
Leucine LEU (L)83.86%
Asparagine ASN (N)125.8%
Glutamine GLN (Q)62.9%
Proline PRO (P)146.76%
Serine SER (S)125.8%
Arginine ARG (R)136.28%
Threonine THR (T)146.76%
Tryptophan TRP (W)31.45%
Valine VAL (V)157.25%
Tyrosine TYR (Y)83.86%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC961
HydrogenH1460
NitrogenN276
OxygenO294
SulphurS17

FormulaC961H1460N276O294S17
Total Number of Atoms:3008


Total number of positively charged residues (ARG + LYS):20
Total number of negatively charged residues (ASP + GLU):17
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    29420
Absorption 0.1% (=1 g/l)    1.329,   assuming all pairs of CYS residues form cystines

Ext. coefficient    28420
Absorption 0.1% (=1 g/l)    1.284,   assuming all CYS residues are reduced
Aromaticity:0.111

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 33.36

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[24.15, 28.99, 16.91]

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:54.2512
Grand average of hydropathicity (GRAVY):-0.23