Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5801
Number of amino acids:148
Molecular Weight:16135.67 Da
Theoretical pI:7.66


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)1711.49%
Cysteine CYS (C)106.76%
Glutamic Acid GLU (E)64.05%
Aspartic Acid ASP (D)53.38%
Glycine GLY (G)106.76%
Phynylalanine PHE (F)42.7%
Isoleucine ILE (I)64.05%
Histidine HIS (H)32.03%
Lysine LYS (K)32.03%
Methionine MET (M)42.7%
Leucine LEU (L)1510.14%
Asparagine ASN (N)42.7%
Glutamine GLN (Q)85.41%
Proline PRO (P)106.76%
Serine SER (S)96.08%
Arginine ARG (R)96.08%
Threonine THR (T)85.41%
Tryptophan TRP (W)10.68%
Valine VAL (V)96.08%
Tyrosine TYR (Y)74.73%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC707
HydrogenH1115
NitrogenN197
OxygenO207
SulphurS14

FormulaC707H1115N197O207S14
Total Number of Atoms:2240


Total number of positively charged residues (ARG + LYS):12
Total number of negatively charged residues (ASP + GLU):11
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    16555
Absorption 0.1% (=1 g/l)    1.026,   assuming all pairs of CYS residues form cystines

Ext. coefficient    15930
Absorption 0.1% (=1 g/l)    0.987,   assuming all CYS residues are reduced
Aromaticity:0.081

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 48.00

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[28.38, 22.30, 28.38]

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:84.4593
Grand average of hydropathicity (GRAVY):0.07