Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4250
Number of amino acids:683
Molecular Weight:75908.01 Da
Theoretical pI:7.51


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)446.44%
Cysteine CYS (C)213.07%
Glutamic Acid GLU (E)375.42%
Aspartic Acid ASP (D)355.12%
Glycine GLY (G)547.91%
Phynylalanine PHE (F)395.71%
Isoleucine ILE (I)436.3%
Histidine HIS (H)91.32%
Lysine LYS (K)355.12%
Methionine MET (M)111.61%
Leucine LEU (L)7110.4%
Asparagine ASN (N)324.69%
Glutamine GLN (Q)213.07%
Proline PRO (P)294.25%
Serine SER (S)618.93%
Arginine ARG (R)385.56%
Threonine THR (T)294.25%
Tryptophan TRP (W)81.17%
Valine VAL (V)426.15%
Tyrosine TYR (Y)243.51%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC3401
HydrogenH5311
NitrogenN911
OxygenO995
SulphurS32

FormulaC3401H5311N911O995S32
Total Number of Atoms:10650


Total number of positively charged residues (ARG + LYS):73
Total number of negatively charged residues (ASP + GLU):72
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    81010
Absorption 0.1% (=1 g/l)    1.067,   assuming all pairs of CYS residues form cystines

Ext. coefficient    79760
Absorption 0.1% (=1 g/l)    1.051,   assuming all CYS residues are reduced
Aromaticity:0.104

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 44.37

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[33.24, 25.77, 23.87]

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:89.3704
Grand average of hydropathicity (GRAVY):-0.07