Physicochemical Properties of Peptide



PPepDB ID:PPepDB_6025
Number of amino acids:82
Molecular Weight:9006.47 Da
Theoretical pI:7.5


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)89.76%
Cysteine CYS (C)89.76%
Glutamic Acid GLU (E)11.22%
Aspartic Acid ASP (D)67.32%
Glycine GLY (G)22.44%
Phynylalanine PHE (F)22.44%
Isoleucine ILE (I)89.76%
Histidine HIS (H)11.22%
Lysine LYS (K)67.32%
Methionine MET (M)11.22%
Leucine LEU (L)67.32%
Asparagine ASN (N)44.88%
Glutamine GLN (Q)78.54%
Proline PRO (P)33.66%
Serine SER (S)56.1%
Arginine ARG (R)22.44%
Threonine THR (T)67.32%
Tryptophan TRP (W)11.22%
Valine VAL (V)44.88%
Tyrosine TYR (Y)11.22%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC387
HydrogenH632
NitrogenN108
OxygenO120
SulphurS9

FormulaC387H632N108O120S9
Total Number of Atoms:1256


Total number of positively charged residues (ARG + LYS):8
Total number of negatively charged residues (ASP + GLU):7
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    7490
Absorption 0.1% (=1 g/l)    0.832,   assuming all pairs of CYS residues form cystines

Ext. coefficient    6990
Absorption 0.1% (=1 g/l)    0.776,   assuming all CYS residues are reduced
Aromaticity:0.049

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 16.69

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[26.83, 17.07, 19.51]

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:90.4878
Grand average of hydropathicity (GRAVY):0.04