Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5545
Number of amino acids:293
Molecular Weight:33540.69 Da
Theoretical pI:9.03


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)165.46%
Cysteine CYS (C)51.71%
Glutamic Acid GLU (E)93.07%
Aspartic Acid ASP (D)186.14%
Glycine GLY (G)196.48%
Phynylalanine PHE (F)175.8%
Isoleucine ILE (I)103.41%
Histidine HIS (H)82.73%
Lysine LYS (K)113.75%
Methionine MET (M)51.71%
Leucine LEU (L)217.17%
Asparagine ASN (N)134.44%
Glutamine GLN (Q)144.78%
Proline PRO (P)237.85%
Serine SER (S)279.22%
Arginine ARG (R)227.51%
Threonine THR (T)186.14%
Tryptophan TRP (W)82.73%
Valine VAL (V)155.12%
Tyrosine TYR (Y)144.78%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1507
HydrogenH2261
NitrogenN421
OxygenO434
SulphurS10

FormulaC1507H2261N421O434S10
Total Number of Atoms:4633


Total number of positively charged residues (ARG + LYS):33
Total number of negatively charged residues (ASP + GLU):27
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    65110
Absorption 0.1% (=1 g/l)    1.941,   assuming all pairs of CYS residues form cystines

Ext. coefficient    64860
Absorption 0.1% (=1 g/l)    1.934,   assuming all CYS residues are reduced
Aromaticity:0.133

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 47.10

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[29.01, 27.99, 17.41]

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:61.57
Grand average of hydropathicity (GRAVY):-0.59