Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4208
Number of amino acids:459
Molecular Weight:51626.04 Da
Theoretical pI:9.18


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)245.23%
Cysteine CYS (C)102.18%
Glutamic Acid GLU (E)214.58%
Aspartic Acid ASP (D)194.14%
Glycine GLY (G)265.66%
Phynylalanine PHE (F)286.1%
Isoleucine ILE (I)224.79%
Histidine HIS (H)132.83%
Lysine LYS (K)296.32%
Methionine MET (M)122.61%
Leucine LEU (L)5912.85%
Asparagine ASN (N)204.36%
Glutamine GLN (Q)61.31%
Proline PRO (P)214.58%
Serine SER (S)449.59%
Arginine ARG (R)245.23%
Threonine THR (T)286.1%
Tryptophan TRP (W)40.87%
Valine VAL (V)337.19%
Tyrosine TYR (Y)163.49%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2341
HydrogenH3682
NitrogenN616
OxygenO654
SulphurS22

FormulaC2341H3682N616O654S22
Total Number of Atoms:7315


Total number of positively charged residues (ARG + LYS):53
Total number of negatively charged residues (ASP + GLU):40
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    46465
Absorption 0.1% (=1 g/l)    0.900,   assuming all pairs of CYS residues form cystines

Ext. coefficient    45840
Absorption 0.1% (=1 g/l)    0.888,   assuming all CYS residues are reduced
Aromaticity:0.105

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 35.23

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[35.29, 24.18, 25.27]

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:94.9018
Grand average of hydropathicity (GRAVY):0.03