Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4688
Number of amino acids:360
Molecular Weight:40110.92 Da
Theoretical pI:5.98


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)236.39%
Cysteine CYS (C)71.94%
Glutamic Acid GLU (E)287.78%
Aspartic Acid ASP (D)205.56%
Glycine GLY (G)339.17%
Phynylalanine PHE (F)154.17%
Isoleucine ILE (I)164.44%
Histidine HIS (H)123.33%
Lysine LYS (K)298.06%
Methionine MET (M)92.5%
Leucine LEU (L)215.83%
Asparagine ASN (N)215.83%
Glutamine GLN (Q)113.06%
Proline PRO (P)113.06%
Serine SER (S)298.06%
Arginine ARG (R)123.33%
Threonine THR (T)195.28%
Tryptophan TRP (W)71.94%
Valine VAL (V)246.67%
Tyrosine TYR (Y)133.61%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1767
HydrogenH2718
NitrogenN488
OxygenO550
SulphurS16

FormulaC1767H2718N488O550S16
Total Number of Atoms:5539


Total number of positively charged residues (ARG + LYS):41
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    58245
Absorption 0.1% (=1 g/l)    1.452,   assuming all pairs of CYS residues form cystines

Ext. coefficient    57870
Absorption 0.1% (=1 g/l)    1.443,   assuming all CYS residues are reduced
Aromaticity:0.097

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 26.59

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[26.67, 26.11, 22.50]

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:65.8055
Grand average of hydropathicity (GRAVY):-0.57