Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5989
Number of amino acids:441
Molecular Weight:49985.65 Da
Theoretical pI:5.91


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)173.85%
Cysteine CYS (C)92.04%
Glutamic Acid GLU (E)286.35%
Aspartic Acid ASP (D)163.63%
Glycine GLY (G)327.26%
Phynylalanine PHE (F)194.31%
Isoleucine ILE (I)286.35%
Histidine HIS (H)92.04%
Lysine LYS (K)245.44%
Methionine MET (M)71.59%
Leucine LEU (L)419.3%
Asparagine ASN (N)255.67%
Glutamine GLN (Q)184.08%
Proline PRO (P)245.44%
Serine SER (S)409.07%
Arginine ARG (R)143.17%
Threonine THR (T)296.58%
Tryptophan TRP (W)92.04%
Valine VAL (V)245.44%
Tyrosine TYR (Y)286.35%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2265
HydrogenH3439
NitrogenN577
OxygenO670
SulphurS16

FormulaC2265H3439N577O670S16
Total Number of Atoms:6967


Total number of positively charged residues (ARG + LYS):38
Total number of negatively charged residues (ASP + GLU):44
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    91720
Absorption 0.1% (=1 g/l)    1.835,   assuming all pairs of CYS residues form cystines

Ext. coefficient    91220
Absorption 0.1% (=1 g/l)    1.825,   assuming all CYS residues are reduced
Aromaticity:0.127

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 36.44

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[33.79, 27.44, 21.09]

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:80.6576
Grand average of hydropathicity (GRAVY):-0.31