Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4490
Number of amino acids:353
Molecular Weight:38825.09 Da
Theoretical pI:5.68


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)257.08%
Cysteine CYS (C)102.83%
Glutamic Acid GLU (E)82.27%
Aspartic Acid ASP (D)246.8%
Glycine GLY (G)174.82%
Phynylalanine PHE (F)236.52%
Isoleucine ILE (I)164.53%
Histidine HIS (H)61.7%
Lysine LYS (K)61.7%
Methionine MET (M)71.98%
Leucine LEU (L)4312.18%
Asparagine ASN (N)277.65%
Glutamine GLN (Q)133.68%
Proline PRO (P)185.1%
Serine SER (S)339.35%
Arginine ARG (R)215.95%
Threonine THR (T)287.93%
Tryptophan TRP (W)10.28%
Valine VAL (V)226.23%
Tyrosine TYR (Y)51.42%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1709
HydrogenH2695
NitrogenN475
OxygenO524
SulphurS17

FormulaC1709H2695N475O524S17
Total Number of Atoms:5420


Total number of positively charged residues (ARG + LYS):27
Total number of negatively charged residues (ASP + GLU):32
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    13575
Absorption 0.1% (=1 g/l)    0.350,   assuming all pairs of CYS residues form cystines

Ext. coefficient    12950
Absorption 0.1% (=1 g/l)    0.334,   assuming all CYS residues are reduced
Aromaticity:0.082

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 44.04

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[31.16, 26.91, 23.51]

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:90.3399
Grand average of hydropathicity (GRAVY):-0.01