Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4693
Number of amino acids:355
Molecular Weight:39617.52 Da
Theoretical pI:5.6


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)246.76%
Cysteine CYS (C)92.54%
Glutamic Acid GLU (E)277.61%
Aspartic Acid ASP (D)215.92%
Glycine GLY (G)318.73%
Phynylalanine PHE (F)185.07%
Isoleucine ILE (I)164.51%
Histidine HIS (H)82.25%
Lysine LYS (K)257.04%
Methionine MET (M)71.97%
Leucine LEU (L)267.32%
Asparagine ASN (N)164.51%
Glutamine GLN (Q)123.38%
Proline PRO (P)123.38%
Serine SER (S)318.73%
Arginine ARG (R)154.23%
Threonine THR (T)164.51%
Tryptophan TRP (W)61.69%
Valine VAL (V)215.92%
Tyrosine TYR (Y)143.94%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1755
HydrogenH2695
NitrogenN475
OxygenO541
SulphurS16

FormulaC1755H2695N475O541S16
Total Number of Atoms:5482


Total number of positively charged residues (ARG + LYS):40
Total number of negatively charged residues (ASP + GLU):48
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    54360
Absorption 0.1% (=1 g/l)    1.372,   assuming all pairs of CYS residues form cystines

Ext. coefficient    53860
Absorption 0.1% (=1 g/l)    1.359,   assuming all CYS residues are reduced
Aromaticity:0.107

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 30.89

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[28.45, 25.35, 23.66]

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:70.0563
Grand average of hydropathicity (GRAVY):-0.45