Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4453
Number of amino acids:735
Molecular Weight:81299.05 Da
Theoretical pI:8.42


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)506.8%
Cysteine CYS (C)91.22%
Glutamic Acid GLU (E)385.17%
Aspartic Acid ASP (D)283.81%
Glycine GLY (G)466.26%
Phynylalanine PHE (F)334.49%
Isoleucine ILE (I)405.44%
Histidine HIS (H)192.59%
Lysine LYS (K)334.49%
Methionine MET (M)101.36%
Leucine LEU (L)10414.15%
Asparagine ASN (N)385.17%
Glutamine GLN (Q)324.35%
Proline PRO (P)476.39%
Serine SER (S)7410.07%
Arginine ARG (R)375.03%
Threonine THR (T)415.58%
Tryptophan TRP (W)70.95%
Valine VAL (V)304.08%
Tyrosine TYR (Y)192.59%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC3647
HydrogenH5766
NitrogenN994
OxygenO1072
SulphurS19

FormulaC3647H5766N994O1072S19
Total Number of Atoms:11498


Total number of positively charged residues (ARG + LYS):70
Total number of negatively charged residues (ASP + GLU):66
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    67310
Absorption 0.1% (=1 g/l)    0.828,   assuming all pairs of CYS residues form cystines

Ext. coefficient    66810
Absorption 0.1% (=1 g/l)    0.822,   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 : 47.38

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[31.70, 27.89, 27.48]

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:95.0478
Grand average of hydropathicity (GRAVY):-0.16