Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4387
Number of amino acids:507
Molecular Weight:57089.45 Da
Theoretical pI:4.84


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)346.71%
Cysteine CYS (C)61.18%
Glutamic Acid GLU (E)509.86%
Aspartic Acid ASP (D)356.9%
Glycine GLY (G)244.73%
Phynylalanine PHE (F)407.89%
Isoleucine ILE (I)265.13%
Histidine HIS (H)81.58%
Lysine LYS (K)469.07%
Methionine MET (M)30.59%
Leucine LEU (L)418.09%
Asparagine ASN (N)254.93%
Glutamine GLN (Q)101.97%
Proline PRO (P)275.33%
Serine SER (S)438.48%
Arginine ARG (R)122.37%
Threonine THR (T)173.35%
Tryptophan TRP (W)30.59%
Valine VAL (V)418.09%
Tyrosine TYR (Y)163.16%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2595
HydrogenH3971
NitrogenN643
OxygenO789
SulphurS9

FormulaC2595H3971N643O789S9
Total Number of Atoms:8007


Total number of positively charged residues (ARG + LYS):58
Total number of negatively charged residues (ASP + GLU):85
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    40715
Absorption 0.1% (=1 g/l)    0.713,   assuming all pairs of CYS residues form cystines

Ext. coefficient    40340
Absorption 0.1% (=1 g/l)    0.707,   assuming all CYS residues are reduced
Aromaticity:0.116

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 36.24

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[32.94, 23.47, 25.25]

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:81.6963
Grand average of hydropathicity (GRAVY):-0.32