Physicochemical Properties of Peptide



PPepDB ID:PPepDB_6038
Number of amino acids:113
Molecular Weight:12420.92 Da
Theoretical pI:5.52


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)119.73%
Cysteine CYS (C)10.88%
Glutamic Acid GLU (E)87.08%
Aspartic Acid ASP (D)54.42%
Glycine GLY (G)108.85%
Phynylalanine PHE (F)43.54%
Isoleucine ILE (I)65.31%
Histidine HIS (H)32.65%
Lysine LYS (K)32.65%
Methionine MET (M)32.65%
Leucine LEU (L)87.08%
Asparagine ASN (N)76.19%
Glutamine GLN (Q)43.54%
Proline PRO (P)43.54%
Serine SER (S)87.08%
Arginine ARG (R)76.19%
Threonine THR (T)87.08%
Tryptophan TRP (W)32.65%
Valine VAL (V)87.08%
Tyrosine TYR (Y)21.77%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC544
HydrogenH849
NitrogenN157
OxygenO169
SulphurS4

FormulaC544H849N157O169S4
Total Number of Atoms:1723


Total number of positively charged residues (ARG + LYS):10
Total number of negatively charged residues (ASP + GLU):13
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    19480
Absorption 0.1% (=1 g/l)    1.568,   assuming all pairs of CYS residues form cystines

Ext. coefficient    19480
Absorption 0.1% (=1 g/l)    1.568,   assuming all CYS residues are reduced
Aromaticity:0.080

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 43.49

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[27.43, 25.66, 26.55]

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:78.5841
Grand average of hydropathicity (GRAVY):-0.30